S-19500/19501 Series
AUTOMOTIVE, 125°C OPERATION,
36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER
V
OLTAGE REGULATOR WITH RESET FUNCTION
www.ablic.com
© ABLIC Inc., 2014-2020 Rev.1.7_00
1
The S-19500/19501 Series, developed by using high-withstand voltage CMOS technology, is a low dropout positive
voltage regulator with the watchdog timer and the reset function, which has high-withstand voltage. The monitoring time of
watchdog timer can be adjusted by an external capacitor. Moreover, a voltage detection circuit which monitors the output
voltage is also prepared.
ABLIC Inc. offers a "thermal simulation service" which supports the thermal design in conditions when our power
management ICs are in use by customers. Our thermal simulation service will contribute to reducing the risk in the thermal
design at customers' development stage.
ABLIC Inc. also offers FIT rate calculated based on actual customer usage conditions in order to support customer
functional safety design.
Contact our sales representatives for details.
Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product for
these purposes, it is imperative to contact our sales representatives.
Features
Regulator block
• Output voltage: 3.0 V to 5.3 V, selectable in 0.1 V step
• Input voltage: 4.0 V to 36.0 V
• Output voltage accuracy: ±2.0% (Tj = −40°C to +150°C)
• Dropout voltage: 120 mV typ. (5.0 V output product, IOUT = 100 mA)
• Output current: Possible to output 200 mA (VIN = VOUT(S) + 1.0 V)*1
• Input and output capacitors: A ceramic capacitor of 2.2 μF or more can be used.
• Ripple rejection: 70 dB typ. (f = 100 Hz)
• Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
• Built-in thermal shutdown circuit: Detection temperature 170°C typ.
Detector block
• Detection voltage: 2.6 V to 5.0 V, selectable in 0.1 V step
• Detection voltage accuracy: ±100 mV (Tj = −40°C to +150°C)
• Hysteresis width: 0.12 V min.
• Release delay time is adjustable*2: 18 ms typ. (CDLY = 47 nF)
Watchdog timer block
• Watchdog activation current is adjustable: 1.5 mA typ. (WADJ pin is open)
• Watchdog trigger time is adjustable*2: 43 ms typ. (CDLY = 47 nF)
• Product type is selectable: S-19500 Series (Product with WEN pin (Output: WO / RO pin))
S-19501 Series (Product without WEN pin (Output: WO pin and RO pin))
• Autonomous watchdog operation function: Watchdog timer operates due to detection of load current.
• Watchdog mode: Time-out mode
Overall
• Current consumption: 60 μA typ. (IOUT = 0 mA, During the watchdog timer deactivation)
75 μA typ. (IOUT ≤ 5 mA, During the watchdog timer activation)
• Operation temperature range: Ta = −40°C to +125°C
• Lead-free (Sn 100%), halogen-free
• Withstand 45 V load dump
• AEC-Q100 qualified*3
*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
*2. The release delay time and the watchdog trigger time can be adjusted by connecting CDLY to the DLY pin.
*3. Contact our sales representatives for details.
Applications
• Constant-voltage power supply for automotive electric component, monitoring of microcontroller
Package
• HSOP-8A
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
2
Block Diagrams
1. S-19500 Series (Product with WEN pin)
VIN
VSS
WADJ
VOUT
DLY
WO / RO
WI
WEN
Voltage
detection
circuit
WDT
circuit
−
+
−
−
−
+
+
+
Thermal
shutdown
circuit
Overcurrent protection circuit
Reference
voltage circuit
Reference
voltage
circuit
Figure 1
2. S-19501 Series (Product without WEN pin)
VIN
VSS
WADJ
VOUT
DLY
WO
WI
Voltage
detection
circuit
WDT
circuit
−
+
−
−
−
+
+
+
RO
Thermal
shutdown
circuit
Overcurrent protection circuit
Reference
voltage circuit
Reference
voltage
circuit
Figure 2
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
3
AEC-Q100 Qualified
This IC supports AEC-Q100 for the operation temperature grade 1.
Contact our sales representatives for details of AEC-Q100 reliability specification.
Product Name Structure
1. Product name
S-1950 x A x x A - E8T1 U 4
Package abbreviation and IC packing specifications*1
E8T1: HSOP-8A, Tape
Environmental code
U: Lead-free (Sn 100%), halogen-free
Operation temperature
A: Ta = −40°C to +125°C
Product type
0: S-19500 Series (Product with WEN pin)
1: S-19501 Series (Product without WEN pin)
Detection voltage*2
F to Z, 0 to 5
Output voltage*2
C to Z, 0, 1
*1. Refer to the tape drawing.
*2. Refer to "2. Product option list".
2. Product option list
Table 1 Output Voltage Table 2 Detection Voltage
Set Output
Voltage Symbol Set Output
Voltage Symbol Set Detection
Voltage Symbol Set Detection
Voltage Symbol
5.3 V C 4.1 V Q 5.0 V F 3.7 V U
5.2 V D 4.0 V R 4.9 V G 3.6 V V
5.1 V E 3.9 V S 4.8 V H 3.5 V W
5.0 V F 3.8 V T 4.7 V J 3.4 V X
4.9 V G 3.7 V U 4.6 V K 3.3 V Y
4.8 V H 3.6 V V 4.5 V L 3.2 V Z
4.7 V J 3.5 V W 4.4 V M 3.1 V 0
4.6 V K 3.4 V X 4.3 V N 3.0 V 1
4.5 V L 3.3 V Y 4.2 V P 2.9 V 2
4.4 V M 3.2 V Z 4.1 V Q 2.8 V 3
4.3 V N 3.1 V 0 4.0 V R 2.7 V 4
4.2 V P 3.0 V 1 3.9 V S 2.6 V 5
3.8 V T
Remark Set output voltage ≥ Set detection voltage + 0.3 V
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
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3. Package
Table 3 Package Drawing Codes
Package Name Dimension Tape Reel Land
HSOP-8A FH008-A-P-SD FH008-A-C-SD FH008-A-R-SD FH008-A-L-SD
4. Product name list
4. 1 S-19500 Series (Product with WEN pin)
Table 4
Output Voltage (VOUT) Detection Voltage (−VDET) HSOP-8A
3.1 V ± 2.0% 2.8 V ± 0.1 V S-19500A03A-E8T1U4
3.3 V ± 2.0% 2.8 V ± 0.1 V S-19500AY3A-E8T1U4
3.3 V ± 2.0% 3.0 V ± 0.1 V S-19500AY1A-E8T1U4
5.0 V ± 2.0% 2.8 V ± 0.1 V S-19500AF3A-E8T1U4
5.0 V ± 2.0% 4.2 V ± 0.1 V S-19500AFPA-E8T1U4
5.0 V ± 2.0% 4.5 V ± 0.1 V S-19500AFLA-E8T1U4
5.0 V ± 2.0% 4.6 V ± 0.1 V S-19500AFKA-E8T1U4
5.0 V ± 2.0% 4.7 V ± 0.1 V S-19500AFJA-E8T1U4
5.3 V ± 2.0% 5.0 V ± 0.1 V S-19500ACFA-E8T1U4
Remark Please contact our sales representatives for products other than the above.
4. 2 S-19501 Series (Product without WEN pin)
Table 5
Output Voltage (VOUT) Detection Voltage (−VDET) HSOP-8A
3.3 V ± 2.0% 2.8 V ± 0.1 V S-19501AY3A-E8T1U4
5.0 V ± 2.0% 2.9 V ± 0.1 V S-19501AF2A-E8T1U4
5.0 V ± 2.0% 3.5 V ± 0.1 V S-19501AFWA-E8T1U4
5.0 V ± 2.0% 4.2 V ± 0.1 V S-19501AFPA-E8T1U4
5.0 V ± 2.0% 4.5 V ± 0.1 V S-19501AFLA-E8T1U4
5.0 V ± 2.0% 4.6 V ± 0.1 V S-19501AFKA-E8T1U4
5.0 V ± 2.0% 4.7 V ± 0.1 V S-19501AFJA-E8T1U4
Remark Please contact our sales representatives for products other than the above.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
5
Pin Configuration
1. HSOP-8A
8
5
6
7
1
4
3
2
Bottom view
Top view
1
4
3
2
8
5
6
7
*1
Figure 3
Table 6 S-19500 Series (Product with WEN pin)
Pin No. Symbol Description
1 VOUT Voltage output pin (Regulator block)
2 WADJ Connection pin for watchdog activation
threshold current adjustment resisto
r
3 VSS GND pin
4 DLY Connection pin for release delay time and
monitoring time adjustment capacito
r
5 WO / RO*2 WO Watchdog output pin
RO Reset output pin
6 WEN Watchdog enable pin
7 WI Watchdog input pin
8 VIN Voltage input pin (Regulator block)
Table 7 S-19501 Series (Product without WEN pin)
Pin No. Symbol Description
1 VOUT Voltage output pin (Regulator block)
2 WADJ Connection pin for watchdog activation
threshold current adjustment resisto
r
3 VSS GND pin
4 DLY Connection pin for release delay time and
monitoring time adjustment capacito
r
5 RO Reset output pin
6 WO Watchdog output pin
7 WI Watchdog input pin
8 VIN Voltage input pin (Regulator block)
*1. Connect the heat sink of backside at shadowed area to the board, and set electric potential GND.
However, do not use it as the function of electrode.
*2. The WO / RO pin combines the watchdog output pin and the reset output pin.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
6
Absolute Maximum Ratings
Table 8
(Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
VIN pin voltage VIN VSS − 0.3 to VSS + 45.0 V
VOUT pin voltage VOUT VSS − 0.3 to VIN + 0.3 ≤ VSS + 7.0 V
DLY pin voltage VDLY VSS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V
RO pin voltage VRO VSS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V
WADJ pin voltage VWADJ VSS − 0.3 to VIN + 0.3 ≤ VSS + 7.0 V
WEN pin voltage VWEN VSS − 0.3 to VSS + 7.0 V
WI pin voltage VWI VSS − 0.3 to VSS + 7.0 V
WO pin voltage VWO VSS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V
WO / RO pin voltage VWO / RO VSS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V
Output current IOUT 260 mA
Junction temperature Tj −40 to +150 °C
Operation ambient temperature Topr −40 to +125 °C
Storage temperature Tstg −40 to +150 °C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
Thermal Resistance Value
Table 9
Item Symbol Condition Min. Typ. Max. Unit
Junction-to-ambient thermal resistance*1 θJA HSOP-8A
Board A − 104 − °C/W
Board B − 74 − °C/W
Board C − 39 − °C/W
Board D − 37 − °C/W
Board E − 31 − °C/W
*1. Test environment: compliance with JEDEC STANDARD JESD51-2A
Remark Refer to " Power Dissipation" and "Test Board" for details.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
7
Recommended Operation Conditions
Table 10
Item Symbol Condition Min. Typ. Max. Unit
VIN pin voltage VIN
− 4.0 − 36.0 V
When using autonomous
watchdog operation function*1
VOUT(S)
+ 1.0 − 36.0 V
VOUT pin voltage VOUT
Detector block 1.0 − − V
Watchdog timer block +VDET − − V
Watchdog input voltage "H"*2 V
WIH − 2 − − V
Watchdog input voltage "L"*2 V
WIL − − −
0.8 V
Watchdog input "H" time*2 t
high VWI ≥ VWIH 5.0 − − μs
Watchdog input "L" time*2 t
Iow VWI ≤ VWIL 5.0 − − μs
Slew rate*2 dVWI
dt VWI = VWIL + (VWIH − VWIL) × 0.1
to VWIL + (VWIH − VWIL) × 0.9 1 − − V/μs
Watchdog input frequency fWI Duty ratio 50% − −
0.2 MHz
WEN pin input voltage "H" VWENH S-19500 Series 2.0 − VOUT(S) V
WEN pin input voltage "L" VWENL S-19500 Series 0 − 0.8 V
Input capacitance CIN − 2.2 − − μF
Output capacitance CL − 2.2 − − μF
Equivalent series resistance RESR Output capacito
r
(CL) − − 10 Ω
Release delay time and monitoring
time adjustment capacitance
*3
CDLY − 1 47 − nF
Watchdog activation threshold
current adjustment resistance*4 RWADJ,ext Connected to WADJ pin 10 − − kΩ
External pull-up resistances for
output pins
RextW S-19501 Series Connected to
WO pin 3 − − kΩ
RextR
S-19500 Series Connected to
WO / RO pin 3 − − kΩ
S-19501 Series Connected to
RO pin 3 − − kΩ
*1. Refer to "3. Watchdog timer block" in " Operation" for the autonomous watchdog operation function.
*2. When inputting a rising edge that satisfies the condition of Figure 4 to the WI pin, the watchdog timer detects a
trigger.
The signal input from the monitored object by the watchdog timer should satisfy the condition of Figure 4.
*3. Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in " Selection of
External Parts" for the details.
*4. Refer to "3. Watchdog activation threshold current adjustment resistor (RWADJ,ext)" in " Selection of
External Parts" for the details.
V
WIH
V
WIL
V
WI
t
low
t
hi
g
h
dV
WI
dt
t
Figure 4
Caution 1. Generally a series regulator may cause oscillation, depending on the selection of external parts.
Confirm that no oscillation occurs in the actual application using capacitors that meet the above
CIN, CL, and RESR.
2. Define the external pull-up resistance by sufficient evaluation including the temperature
characteristics under the actual usage conditions.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
8
Electrical Characteristics
1. Regulator block
Table 11
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max.
Unit Test
Circuit
Output voltage*1 VOUT(E) VIN = 13.5 V, IOUT = 30 mA VOUT(S)
− 2.0% VOUT(S) VOUT(S)
+ 2.0% V 1
Output current*2 I
OUT VIN ≥ VOUT(S) + 1.0 V 200*7 − −
mA 2
Dropout voltage*3 V
drop
IOUT = 30 mA, Ta = +25°C,
VOUT(S) = 3.0 V to 5.3 V − 40 50
mV 1
IOUT = 100 mA, Ta = +25°C,
VOUT(S) = 3.0 V to 5.3 V − 120 200
mV 1
Line regulation*4 ΔVOUT1
ΔVIN • VOUT VOUT(S) + 1.0 V ≤ VIN ≤ 36.0 V,
IOUT = 30 mA, Ta = +25°C − 0.02 0.10
%/V 1
Load regulation*5 ΔVOUT2 VIN = 13.5 V, 100 μA ≤ IOUT ≤ 100 mA,
Ta = +25°C − 20 40
mV 1
Input voltage VIN − 4.0 − 36.0 V −
Ripple rejection |RR| VIN = 13.5 V, IOUT = 30 mA,
f = 100 Hz, ΔVrip = 1.0 Vp-p − 70 − dB 3
Limit current*6 I
LIM VIN = VOUT(S) + 1.0 V, VOUT = 1.2 V,
Ta = +25°C 260 500 700 mA 2
Short-circuit current Ishort VIN = 13.5 V, VOUT = 0 V, Ta = +25°C 30 60 80
mA 2
Thermal shutdown
detection
temperature
TSD Junction temperature − 170 − °C −
Thermal shutdown
release temperature TSR Junction temperature − 135 − °C −
*1. The accuracy is guaranteed when the input voltage, output current, and temperature satisfy the conditions listed
above.
V
OUT(S): Set output voltage
V
OUT(E): Actual output voltage
*2. The output current when increasing the output current gradually until the output voltage has reached the value of
95% of VOUT(E).
*3. The difference between input voltage (VIN1) and the output voltage when decreasing input voltage (VIN) gradually
until the output voltage has dropped out to the value of 98% of output voltage (VOUT3).
Vdrop: VIN1 − (VOUT3 × 0.98)
VOUT3: Output voltage when VIN = VOUT(S) + 1.0 V
*4. The dependency of the output voltage against the input voltage. The value shows how much the output voltage
changes due to a change in the input voltage while keeping output current constant.
*5. The dependency of the output voltage against the output current. The value shows how much the output voltage
changes due to a change in the output current while keeping input voltage constant.
*6. The current limited by overcurrent protection circuit.
*7. Due to limitation of the power dissipation, this value may not be satisfied. Attention should be paid to the power
dissipation when the output current is large.
This specification is guaranteed by design.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
9
2. Detector block
Table 12
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
Circuit
Detection voltage*1 −VDET − −VDET(S)
− 0.1 −VDET(S) −VDET(S)
+ 0.1 V 4
Hysteresis width*2 V
HYS − 120 150 − mV 4
Reset output voltage "H" VROH − VOUT(S)
× 0.9 − −
V 4
Reset output voltage "L" VROL VOUT ≥ 1.0 V, RextR ≥ 3 kΩ,
Connected to VOUT pin − 0.2 0.4 V 4
Reset pull-up resistance RRO VOUT pin internal resistance 20 30 45 kΩ −
Reset output current IRO VRO = 0.4 V, VOUT = −VDET(S) − 0.1 V 3.0 − −
mA 5
Release delay time*3 t
rd C
DLY = 47 nF 11 18 25 ms 4
Reset reaction time*4 t
rr C
DLY = 47 nF − −
50*5 μs 4
*1. The voltage at which the output of the RO pin turns to "L". The accuracy is guaranteed when the input voltage and
temperature satisfy the listed conditions above.
−VDET(S): Set detection voltage
−VDET: Actual detection voltage
*2. The voltage difference between the detection voltage (−VDET) and the release voltage (+VDET). The relation between the
actual output voltage (VOUT(E)) of the regulator block and the actual release voltage (+VDET = −VDET + VHYS) of the
detector block is as follows.
V
OUT(E) > +VDET
*3. The time from when VOUT exceeds +VDET to when the RO pin output inverts (Refer to Figure 5). This value changes
according to the release delay time and monitoring time adjustment capacitor (CDLY).
The time period from when VOUT changes to +VDET → VOUT(S) to when VRO reaches VOUT / 2.
*4. The time from when VOUT falls below −VDET to when the RO pin output inverts (Refer to Figure 6). The time period from
when VOUT changes to VOUT(S) → −VDET to when VRO reaches VOUT / 2.
*5. The guaranteed value when the watchdog timer is deactivated. trr may shorten since the discharge operation of CDLY
may be performed while the watchdog timer is activated.
t
rd
V
OUT
V
RO
V
+V
DET
t
t
rr
V
OUT
V
RO
V
−V
DET
t
Figure 5 Release Delay Time Figure 6 Reset Reaction Time
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
10
3. Watchdog timer block
3. 1 S-19500 Series (Product with WEN pin)
Table 13
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
Circuit
Watchdog activation threshold
current IO,WDact WADJ pin is open 1.1 1.5 1.9 mA 6
Watchdog deactivation
threshold current IO,WDdeact WADJ pin is open − 1.3 − mA 6
Watchdog activation hysteresis
current IO,WDhys WADJ pin is open 0.1 0.2 − mA 6
Watchdog activation threshold
voltage VWADJ,th − 1.28 1.35 1.45 V 7
WADJ pin current ratio IOUT
IWADJ V
WADJ = 0 V, IOUT = 10 mA − 750 − −
7
WADJ pin internal resistance RWADJ,int − 490 650 845
kΩ −
Watchdog output pulse period*1 t
WD,p CDLY = 47 nF 38 54 72 ms 6
Watchdog output "L" time*2 t
WD,L VOUT > −VDET, CDLY = 47 nF
Watchdog timer is activated 6 11 16 ms 6
Watchdog trigger time*3 t
WI,tr C
DLY = 47 nF 32 43 56 ms 6
WEN pin input voltage "H" VSH − 2 − − V 8
WEN pin input voltage "L" VSL − − −
0.8 V 8
WEN pin input current "H" ISH V
WEN = VOUT(S) − 0.1 1
μ
A 8
WEN pin input current "L" ISL V
WEN = 0 V −0.1 − 0.1 μA 8
*1. The period of the continuous rectangular wave that appears in the WO / RO pin when the watchdog timer repeats
the detection of a time-out (Refer to Figure 7). It is calculated by using the following equation.
t
WD,p = tWI,tr + tWD,L
*2. The time when the WO / RO pin continues "L" after the watchdog timer detects a time-out (Refer to Figure 7).
*3. The time from when the watchdog timer initiates the detection of a trigger signal to when a time-out is detected and
the WO / RO pin output changes to "L" (Refer to Figure 7). This value changes according to CDLY.
This is the guaranteed value when VOUT increases to +VDET or higher and the discharge operation of CDLY due to the
detector operation is not performed. The discharge operation of CDLY may be performed when VOUT decreases to
−VDET or lower. At that time, tWI,tr, tWD,L and tWD,p may be changed.
t
WI,tr
t
V
DLY
V
DU
V
DWL
t
WD,L
t
V
WO / RO
t
WD,p
Figure 7
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
11
3. 2 S-19501 Series (Product without WEN pin)
Table 14
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
Circuit
Watchdog activation threshold
current IO,WDact WADJ pin is open 1.1 1.5 1.9 mA 6
Watchdog deactivation
threshold current IO,WDdeact WADJ pin is open − 1.3 − mA 6
Watchdog activation hysteresis
current IO,WDhys WADJ pin is open 0.1 0.2 − mA 6
Watchdog activation threshold
voltage VWADJ,th − 1.28 1.35 1.45 V 7
WADJ pin current ratio IOUT
IWADJ V
WADJ = 0 V, IOUT = 10 mA − 750 − −
7
WADJ pin inte
r
nal resistance RWADJ,int − 490 650 845 kΩ −
Watchdog output voltage "H" VWOH − VOUT(S)
× 0.9 − − V 11
Watchdog output voltage "L" VWOL RextW ≥ 3 kΩ,
Connected to VOUT pin − 0.2 0.4 V 11
Watchdog pull-up resistance RWO VOUT pin internal resistance 20 30 45 kΩ −
Watchdog output current IWO VWO = 0.4 V,
VOUT = −VDET(S) − 0.1 V 3.0 − − mA 12
Watchdog output pulse
period*1 tWD,p C
DLY = 47 nF 38 54 72 ms 6
Watchdog output "L" time*2 t
WD,L VOUT > −VDET, CDLY = 47 nF
Watchdog time
r
is activated 6 11 16 ms 6
Watchdog trigger time*3 t
WI,tr C
DLY = 47 nF 32 43 56 ms 6
*1. The period of the continuous rectangular wave that appears in the WO pin when the watchdog timer repeats the
detection of a time-out (Refer to Figure 8). It is calculated by using the following equation.
t
WD,p = tWI,tr + tWD,L
*2. The time when the WO pin continues "L" after the watchdog timer detects a time-out (Refer to Figure 8).
*3. The time from when the watchdog timer initiates the detection of a trigger signal to when a time-out is detected and
the WO pin output changes to "L" (Refer to Figure 8). This value changes according to CDLY.
This is the guaranteed value when VOUT increases to +VDET or higher and the discharge operation of CDLY due to the
detector operation is not performed. The discharge operation of CDLY may be performed when VOUT decreases to
−VDET or lower. At that time, tWI,tr, tWD,L and tWD,p may be changed.
t
WI,tr
t
V
DLY
V
DU
V
DWL
t
WD,L
t
V
WO
t
WD,p
Figure 8
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
12
4. Overall
Table 15
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
Circuit
Current consumption
during operation ISS1
IOUT ≤ 5 mA, WADJ pin is open,
during watchdog timer activation,
WO pin = "H"
− 75 115 μA 9
IOUT = 50 mA, WADJ pin is open,
during watchdog timer activation,
WO pin = "H"
− 80 125 μA 9
IOUT = 200 mA, WADJ pin is open,
during watchdog timer activation,
WO pin = "H"
− 100 150 μA 9
Current consumption
during watchdog timer
deactivation
ISS2
IOUT = 0 mA,
during watchdog timer deactivation − 60 95 μA 10
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
13
Test Circuits
1. S-19500 Series (Product with WEN pin)
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V
+ A
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V
+ A
Figure 9 Test Circuit 1 Figure 10 Test Circuit 2
R
L
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V +
V
R
extR
Figure 11 Test Circuit 3 Figure 12 Test Circuit 4
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V
V
RO
+
V +
A
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+ A
+
V
Figure 13 Test Circuit 5 Figure 14 Test Circuit 6
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+ A
+
V
+
V
+
A
V
WADJ
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
V R
L
+
V
+
A
Figure 15 Test Circuit 7 Figure 16 Test Circuit 8
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+
A
+ A
+
V
WO / RO pin outputs "H".
VIN
WI
VSS
WO / RO
WEN
VOUT
DLY WADJ
+ A
Figure 17 Test Circuit 9 Figure 18 Test Circuit 10
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
14
2. S-19501 Series (Product without WEN pin)
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
V
+ A
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
V
+ A
Figure 19 Test Circuit 1 Figure 20 Test Circuit 2
R
L
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
V
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
V +
V
R
extR
Figure 21 Test Circuit 3 Figure 22 Test Circuit 4
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
A
+
V
V
RO
+
V
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+ A
+
V
Figure 23 Test Circuit 5 Figure 24 Test Circuit 6
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+ A
+
V
+
V
+
A
V
WADJ
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
A
+ A
+
V
WO pin outputs "H".
Figure 25 Test Circuit 7 Figure 26 Test Circuit 8
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+ A
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ +
V
+
V
R
extW
Figure 27 Test Circuit 9 Figure 28 Test Circuit 10
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
15
VIN
WI
VSS
RO
VOUT
WO
DLY WADJ
+
V
V
WO
+
V +
A
Figure 29 Test Circuit 11
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
16
Standard Circuits
1. S-19500 Series (Product with WEN pin)
C
IN*1
C
L*2
Input Output
GND
Single GND
VIN
WI
VSS
WO / RO
R
extR*5
R
WADJ,ext*4
C
DLY*3
WEN
VOUT
DLY WADJ
Figure 30
2. S-19501 Series (Product without WEN pin)
C
IN*1
C
L*2
Input Output
GND
Single GND
VIN
WI
VSS
RO
R
extR*5
R
WADJ,ext*4
C
DLY*3
VOUT
WO
DLY WADJ
R
extW*5
Figure 31
*1. C
IN is a capacitor for stabilizing the input.
*2. C
L is a capacitor for stabilizing the output. A ceramic capacitor of 2.2 μF or more can be used.
*3. C
DLY is the release delay time and monitoring time adjustment capacitor.
*4. R
WADJ,ext is the watchdog activation threshold current adjustment resistor.
*5. R
extR and RextW are the external pull-up resistors for the reset output pin and the watchdog output pin,
respectively. Connection of the external pull-up resistor is not absolutely essential since the
S-19500/19501 Series has a built-in pull-up resistor.
Caution The above connection diagram and constants will not guarantee successful operation. Perform
thorough evaluation using an actual application to set the constants.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
17
Selection of External Parts
1. Input and output capacitors (CIN, CL)
The S-19500/19501 Series requires CL between the VOUT pin and the VSS pin for phase compensation. Operation
is stabilized by a ceramic capacitor with an output capacitance of 2.2 μF or more over the entire temperature range.
When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, the capacitance must be
2.2 μF or more, and the ESR must be 10 Ω or less.
The values of output overshoot and undershoot, which are transient response characteristics, vary depending on the
value of the output capacitor.
The required value of capacitance for the input capacitor differs depending on the application.
Caution Define the capacitance of CIN and CL by sufficient evaluation including the temperature
characteristics under the actual usage conditions.
2. Release delay time and monitoring time adjustment capacitor (CDLY)
In the S-19500/19501 Series, the release delay time and monitoring time adjustment capacitor (CDLY) is necessary
between the DLY pin and the VSS pin to adjust the release delay time (trd) of the detector and the monitoring time of
the watchdog timer.
The set release delay time (trd(S)), the set watchdog trigger time (tWI,tr(S)), the set watchdog output "L" time (tWD,L(S))
and the set watchdog output pulse period (tWD,p(S)) are calculated by using following equations, respectively.
The release delay time (trd), the watchdog trigger time (tWI,tr), the watchdog output "L" time (tWD,L) and the watchdog
output pulse period (tWD,p) at the time of the condition of CDLY = 47 nF are shown in " Electrical Characteristics".
trd(S) [ms] = trd [ms] × CDLY [nF]
47 [nF]
tWI,tr(S) [ms] = tWI,tr [ms] × CDLY [nF]
47 [nF]
tWD,L(S) [ms] = tWD,L [ms] × CDLY [nF]
47 [nF]
tWD,p(S) [ms] = tWI,tr(S) [ms] + tWD,L(S) [ms]
Caution 1. The above equations will not guarantee successful operation. Perform thorough evaluation including
the temperature characteristics using an actual application to set the constants.
2. Mounted board layout should be made in such a way that no current flows into or flows from the DLY
pin since the impedance of the DLY pin is high, otherwise correct delay time and monitoring time may
not be provided.
3. Select CDLY whose leakage current can be ignored against the built-in constant current (5.0 μA typ.).
The leakage current may cause deviation in delay time and monitoring time. When the leakage
current is larger than the built-in constant current, no release takes place.
4. Deviations of CDLY are not included in the equations mentioned above. Be sure to determine the
constants considering the deviation of CDLY to be used.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
18
3. Watchdog activation threshold current adjustment resistor (RWADJ,ext)
In the S-19500/19501 Series, the watchdog activation threshold current adjustment resistor (RWADJ,ext) can be
connected between the WADJ pin and the VSS pin to adjust the watchdog timer activation threshold current.
The set watchdog activation threshold current (IO,WDact(S)), the set watchdog deactivation threshold current
(IO,WDdeact(S)) and the set watchdog activation hysteresis current (IO,WDhys(s)) are calculated by using following
equations, respectively.
The watchdog activation threshold current (IO,WDact), the watchdog deactivation threshold current (IO,WDdeact) and the
watchdog activation hysteresis current (IO,WDhys) when the WADJ pin is open are shown in " Electrical
Characteristics".
IO,WDact(S) [mA] = IO,WDact [mA] ×
1 + RWADJ,int [kΩ]
RWADJ,ext [kΩ]
IO,WDdeact(S) [mA] = IO,WDdeact [mA] ×
1 + RWADJ,int [kΩ]
RWADJ,ext [kΩ]
IO,WDhys(S) [mA] = IO,WDact(S) [mA] − IO,WDdeact(S) [mA]
Caution 1. The above equations will not guarantee successful operation. Perform thorough evaluation including
the temperature characteristics using an actual application to set the constants.
2. Mounted board layout should be made in such a way that no current flows into or flows from the
WADJ pin since the impedance of the WADJ pin is high, otherwise correct IO,WDact and IO,WDdeact may
not be provided.
3. Refer to "3. 2 Autonomous watchdog operation function (Output current detection circuit)" in
" Operation" for the details.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
19
Operation
1. Regulator block
1. 1 Basic operation
Figure 32 shows the block diagram of the regulator in the S-19500/19501 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the
constant output voltage which is not influenced by the input voltage and temperature change, to the output
transistor.
VOUT
*1
VSS
VIN
Rs
Rf
Error
amplifier
Current
supply
Vref
Vfb
−
+
Reference voltage
circuit
*1. Parasitic diode
Figure 32
1. 2 Output transistor
In the S-19500/19501 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to
reverse current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential of VOUT
became higher than VIN.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
20
1. 3 Overcurrent protection circuit
The S-19500/19501 Series includes an overcurrent protection circuit which having the characteristics shown in
"1. 1 Output voltage vs. Output current (When load current increases) (Ta = +25°C)" of "1. Regulator
block" in " Characteristics (Typical Data)", in order to limit an excessive output current and overcurrent of the
output transistor due to short-circuiting between the VOUT pin and the VSS pin. The current when the output pin
is short-circuited (Ishort) is internally set at 60 mA typ., and the load current when short-circuiting is limited based
on this value. The output voltage restarts regulating if the output transistor is released from overcurrent status.
Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps
short circuiting, pay attention to the conditions of input voltage and load current so that, under
the usage conditions including short circuit, the loss of the IC will not exceed power dissipation.
1. 4 Thermal shutdown circuit
The S-19500/19501 Series has a thermal shutdown circuit to limit self-heating. When the junction temperature
rises to 170°C typ., the thermal shutdown circuit operates to stop regulating. After that, when the junction
temperature drops to 135°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-19500/19501 Series, if the thermal shutdown circuit starts operating, it stops
regulating so that the output voltage drops. For this reason, self-heating is limited and the IC's temperature drops.
When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus self-heating is
generated again due to rising of the output voltage. Repeating this procedure makes the waveform of the VOUT
pin output into a pulse-like form. This phenomenon continues unless decreasing either or both of the input
voltage and the output current in order to reduce the internal power consumption, or decreasing the ambient
temperature. Note that the product may suffer physical damage such as deterioration if the above phenomenon
occurs continuously.
Table 16
Thermal Shutdown Circuit VOUT Pin Voltage
Detect: 170°C typ.*1 VSS level
Release: 135°C typ.*1 Set value
*1. Junction temperature
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
21
2. Detector block
2. 1 Basic operation
(1) When the output voltage (VOUT) of the regulator is release voltage (+VDET) of the detector or higher, the Nch
transistor (N1 and N2) are turned off and "H" is output to the RO pin. Since the Pch transistor (P1) is turned on,
the input voltage to the comparator (C1) is RB • VOUT
RA + RB .
(2) Even if VOUT decreases to +VDET or lower, "H" is output to the RO pin when VOUT is the detection voltage (−VDET)
or higher. When VOUT decreases to −VDET (point A in Figure 34) or lower, N1 which is controlled by C1 is turned
on, and CDLY is discharged. If the DLY pin voltage (VDLY) decreases to the lower reset timing threshold voltage
(VDRL) or lower, N2 of output stage of C2 is turned on, and then "L" is output to the RO pin. At this time, P1 is
turned off, and the input voltage to C1 is RB • VOUT
RA + RB + RC .
(3) If VOUT further decreases to the IC's minimum operation voltage or lower, the RO pin output is "H".
(4) When VOUT increases to the IC's minimum operation voltage or higher, "L" is output to the RO pin. Moreover,
even if VOUT exceeds −VDET, the output is "L" when VOUT is lower than +VDET.
(5) When VOUT increases to +VDET (point B in Figure 34) or higher, N1 is turned off and CDLY is charged. N2 is
turned off if VDLY increases to the upper timing threshold voltage (VDU) or higher, and "H" is output to the RO
pin.
VOUT
VSS
DLY
RO
−
+
Reference
volta
g
e circuit
+
−
P1
N1
N2
R
A
R
B
R
C
C1
C2
C
DLY
Figure 33 Operation of Detector Block
Hysteresis width
(V
HYS
)
A
B V
OUT
V
SS
Minimum operation voltage
RO pin output
V
OUT
V
SS
(1) (2) (3) (5) (4)
Release voltage (+V
DET
)
Detection voltage (−V
DET
)
t
rd
Figure 34 Timing Chart of Detector Block
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
22
2. 2 Delay circuit
When the output voltage (VOUT) of the regulator rises under the status that "L" is output to the RO pin, the reset
release signal is output to the RO pin later than when VOUT becomes +VDET. The release delay time (trd) changes
according to CDLY. Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "
Selection of External Parts" for details.
In addition, if the time from when VOUT decreases to −VDET or lower to when VOUT increases to +VDET or higher is
significantly shorter compared to the length of the reset reaction time (trr), VDLY may not decrease to VDRL or lower.
In that case, "H" output remains in the RO pin. Refer to "2. 9 Reset reaction time vs. Release delay time and
monitoring time adjustment capacitance" in " Characteristics (Typical Data)" for the details.
Caution Since trd depends on the charge time of CDLY, trd may be shorter than the set value if the charge
operation is initiated under the condition that a residual electric charge is left in CDLY.
2. 3 Output circuit
Since the RO pin has a built-in resistor to pull up to the VOUT pin internally, the RO pin can output a signal
without an external pull-up resistor
Do not connect to the pin other than VOUT pin when connecting an external pull-up resistor.
In the S-19500 Series, the reset output pin and the watchdog output pin are prepared as the WO / RO pin.
The output level of the WO / RO pin is applied by the AND logic of the reset output pin and the watchdog output
pin.
Example: When the WO pin is "L" and the RO pin is "H", the WO / RO pin is "L".
In the S-19501 Series, the reset output pin is prepared as the RO pin.
Caution Define the external pull-up resistance by sufficient evaluation including the temperature
characteristics under the actual usage conditions.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
23
3. Watchdog timer block
3. 1 Basic operation
The watchdog timer operates as follows during monitoring operation.
(1) When the WO pin outputs "H", CDLY is discharged by an internal constant current source, and the DLY pin
voltage (VDLY) decreases. The watchdog timer detects a trigger and the CDLY is charged by an internal constant
current source if a rising edge is input to the WI pin from a monitored object by the watchdog timer, and then
VDLY rises. The discharge operation is restarted if VDLY reaches the upper timing threshold voltage (VDU), and
VDLY decreases again. By inputting a rising edge to the WI pin again during the discharge operation, the similar
operation is repeated. At this time, the WO pin outputs "H" continuously.
(2) The watchdog timer does not detect a trigger if the rising edge is not input to the WI pin from a monitored object
by the watchdog timer when the CDLY is discharged and VDLY decreases. The WO pin outputs "L" if the
discharge operation continues not detecting a trigger when VDLY reaches the lower watchdog timing threshold
voltage (VDWL). This operation is called the time-out detection.
(3) After the time-out detection, CDLY is charged while the WO pin outputs "L", and VDLY increases. The WO pin
outputs "H" and restarts the discharge operation if VDLY reaches VDU.
(4) By the operation of (3), a monitored object by the watchdog timer is reset. If a rising edge is input to the WI pin
again, the operation similar to (1) is continued since the watchdog timer detects a trigger.
(5) After the operation of (3), if the status in which a rising edge is not input to the WI pin continues, the watchdog
timer repeats the operation of (5) → (3) → (5) →...
DLY
WO
Reference
voltage circuit
+
−
WI
WDT input circuit
VOUT
WEN Charge-
discharge
control
circuit
Output current
detection circuit
WDT enable circuit
VSS
VIN
WADJ
C
DLY
Figure 35
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
24
The time period from when the watchdog timer detects a trigger to when it detects a time-out (tWD,TO) is indicated
as the following expression. Figure 36 shows a timing chart of the watchdog timer.
tWI,tr ≤ tWD,TO ≤ tWD,p
t
V
DLY
V
DU
V
DWL
t
V
WO
t
V
WI
(1)
(2), (5)
(3)
(4)
t
WI,tr
t
WD,TO
Figure 36
Regardless of the status of the watchdog timer, the capacitance of CDLY could be discharged by the detector
operation. Even if watchdog timer detects a trigger of signal input to the WI pin, the WO pin outputs "L" when VDLY
reaches VDWL. After that, the watchdog timer restarts the monitoring operation if the WO pin outputs "H" when VDLY
reaches VDU.
3. 2 Autonomous watchdog operation function (Output current detection circuit)
Since the S-19500/19501 Series has a built-in output current detection circuit, the watchdog timer operates
autonomously. When using the autonomous watchdog operation function, the current flows in the load is detected
by the output current of the regulator, the watchdog timer initiates the activation when the output current is the
watchdog activation threshold current (IO,WDact) or more, the watchdog timer is deactivated when the output current
is the watchdog deactivation threshold current (IO,WDdeact) or less.
Table 17 shows the connection of WADJ pin depending on the usage of the watchdog timer.
In the S-19500 Series, the watchdog timer is deactivated regardless of the connection of the WADJ pin if the
watchdog timer is set to Disable by the WEN pin.
Table 17
Usage of Watchdog Timer Connection of WADJ Pin Status of WADJ Pin
Watchdog timer is not in use Connect to the VSS pin "L"
Watchdog timer is always activated Connect to the VOUT pin via a 270 kΩ
(recommended) resistor*1 "H"
Watchdog timer turns on and off
autonomously depending on the load current
(Autonomous watchdog operation function)
Open or connect to the VSS pin via an
external resistor*2
"H": IOUT > IO,WDact
"L": IOUT < IO,WDdeact
*1. Even if the WADJ pin is directly connected to the VOUT pin, the watchdog timer is always activated. Note that the
current consumption will increase by as many resistors as unconnected.
*2. Refer to "3. Watchdog activation threshold current adjustment resistor (RWADJ,ext)" in " Selection of
External Parts" for details.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
25
Depending on the output current (IOUT) of the regulator, the watchdog timer monitoring activation is as follows.
(1) When IOUT of the regulator is the watchdog activation threshold current (IO,WDact) or more, the WADJ pin voltage
(VWADJ) is higher than the reference voltage (Vref), and the output of the comparator (C1) is "H". At this time, the
watchdog timer initiates the monitoring activation.
(2) When IOUT decreases to the watchdog deactivation threshold current (IO,WDdeact) (point A in Figure 38) or less,
V
WADJ decreases to Vref or less and the output of C1 is "L". At this time, the watchdog timer deactivates the
monitoring. Even if IOUT increases, the watchdog timer continues the monitoring deactivation when IOUT is within
less than IO,WDact
(3) If IOUT further increases to IO,WDact (point B in Figure 38) or more, VWADJ increases to Vref or higher and the
output of C1 is "H". And then, the watchdog timer initiates the monitoring activation.
Reference voltage
circuit
VIN
VSS
WADJ
VOUT
WEN
WDT
circuit
−
+
−
+
R
WADJ,int
R
WADJ,ext
V
ref
V
WADJ
C1
Reference
voltage
circuit
Figure 37 Operation of Output Current Detection Circuit
Watchdog activation
hysteresis current
(I
O,WDhys
)
A
B
I
OUT
0 mA
(1) (2) (3)
Watchdog activation threshold current (I
O,WDact
)
WDT
monitoring
activation
Watchdog deactivation threshold current (I
O,WDdeact
)
WDT
monitoring
activation
WDT
monitoring
deactivation
Figure 38 Autonomous Watchdog Operation Function
Caution Due to detecting IOUT of the regulator, current flows through the resistors connected to the WADJ pin
(RWADJ,ext and RWADJ,int). Therefore, the WADJ pin voltage (VWADJ) may fluctuate since the current
flowing through RWADJ,ext and RWADJ,int also changes in the same way if the output current changes
transiently. VWADJ at that time should be evaluated with the actual device.
Remark IO,WDact, IO,WDdeact and IO,WDhys can be adjusted by connecting RWADJ,ext to the WADJ pin. Refer to
"3. Watchdog activation threshold current adjustment resistor (RWADJ,ext)" in " Selection of External
Parts" for the detail.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
26
3. 3 Watchdog enable circuit (only S-19500 Series)
When inputting "L" to the WEN pin, the watchdog timer becomes Disable and stops the output current detection
operation and monitoring activation. When inputting "H" to the WEN pin, the watchdog timer becomes Enable.
The watchdog timer monitoring activation is performed depending on the connection of the WADJ pin.
The WEN pin is pulled down internally by the constant current source. For this reason, the WEN pin is set to "L"
when using the WEN pin in the floating status, and the watchdog timer becomes Disable. However, in order that
the watchdog timer become Disable certainly, connect the WEN pin to GND so that "L" is input to the WEN pin
certainly, since the impedance of the WEN pin becomes high when using the WEN pin in the floating status.
In order to fix the watchdog timer to Enable, connect the WEN pin to the VOUT pin so that "H" is input to the WEN
pin.
Table 18 and Table 19 show the relation between each pin status and the watchdog timer.
3. 4 Watchdog input circuit
By inputting a rising edge to the WI pin, the watchdog timer detects a trigger. The S-19500/19501 Series has a
built-in watchdog input circuit which contains a band pass filter in the WI pin, and detects a rising edge which
satisfies an input condition as a trigger signal. Refer to *2 of Table 10 and Figure 4 in " Recommended
Operation Conditions".
During the operation of the watchdog timer, a trigger is detected only when the DLY pin voltage is in VDU to VDWL
and while the discharge operation of CDLY is being performed. Refer to "3. Watchdog timer block" in
" Operation" for details. The signal input from a monitored object by the watchdog timer to the watchdog timer
should be input with a time interval which is sufficiently shorter than the watchdog trigger time (tWI,tr).
Table 18 and Table 19 show the relation between each pin status and the watchdog timer.
Caution Under a noisy environment, the watchdog input circuit may detect the noise as a trigger signal.
Sufficiently evaluate with the actual application to confirm that a trigger is detected only in the
intended signal.
3. 5 Watchdog output circuit
Since the WO pin has a built-in resistor to pull up to the VOUT pin internally, the WO pin can output a signal
without an external pull-up resistor
Do not connect to the pin other than VOUT pin when connecting an external pull-up resistor.
In the S-19500 Series, the reset output pin and the watchdog output pin are prepared as the WO / RO pin.
The output level of the WO / RO pin is applied by the AND logic of the reset output pin and the watchdog output
pin.
Example: When the WO pin is "L" and the RO pin is "H", the WO / RO pin is "L".
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
27
3. 6 Each pin status and output logic
Table 18 and Table 19 show each pin status and output logic in truth table.
3. 6. 1 S-19500 Series (Product with WEN pin)
Table 18
Status
Each Pin Status Output Logic
WEN Input WADJ
Status*1 WI Input VOUT Output WO / RO
Output
WDT monitoring activation "H" "H" Trigger ≥ +VDET "H"
WDT abnormal detection "H" "H" No trigger ≥ +VDET "L"
WDT monitoring deactivation "H" "L" Don't care ≥ +VDET "H"
WDT Disable "L" Don't care Don't care ≥ +VDET "H"
Low voltage detection Don't care Don't care Don't care ≤ −VDET "L"
*1. Refer to Table 17 for the status of WADJ pin.
3. 6. 2 S-19501 Series (Product without WEN pin)
Table 19
Status
Each Pin Status Output Logic
WADJ
Status*1 WI Input VOUT Output WO Output RO Output
WDT monitoring activation "H" Trigger ≥ +VDET "H" "H"
WDT abnormal detection "H" No trigger ≥ +VDET "L" "H"
WDT monitoring deactivation "L" Don't care ≥ +VDET "H" "H"
Low voltage detection "H" Don't care ≤ −VDET "L" "L"
"L" Don't care ≤ −VDET "H" "L"
*1. Refer to Table 17 for the status of WADJ pin.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
28
Timing Charts
1. S-19500 Series (Product with WEN pin)
V
DU
V
DWL
t
V
IN
V
OUT
V
WADJ
V
WEN
V
WI
V
DLY
V
WO / RO
+V
DET
t
rd
1/f
WI
t
WI,tr
t
WD,L
t
WD,p
Figure 39 Example of Watchdog Timer Monitoring Operation 1
V
DU
V
DWL
t
V
IN
V
OUT
V
WADJ
V
WEN
V
WI
V
DLY
V
WO / RO
+V
DET
t
rd
1/f
WI
t
WI,tr
t
WD,L
t
WD,p
Figure 40 Example of Watchdog Timer Monitoring Operation 2
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
29
−VDET
+VDET
t
VIN
VOUT
VWADJ
VWEN
VWI
VDLY
VWO / RO
trd trr
≪trr
VDU
VDRL
Figure 41 Example of Detector Operation
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
30
2. S-19501 Series (Product without WEN pin)
t
VIN
VOUT
VWADJ
VWI
VDLY
VRO
VWO
trd
1/fWI
tWI
,
t
r
tWD,L
tWD,p
VDU
VDWL
+VDET
Figure 42 Example of Watchdog Timer Monitoring Operation
−VDET
+VDET
t
VIN
VOUT
VWADJ
VWI
VDLY
VRO
VWO
trd trr
≪trr
VDU
VDRL
Figure 43 Example of Detector Operation
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
31
Precautions
• Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When
mounting an output capacitor between the VOUT pin and the VSS pin (CL) and an input capacitor between the VIN
pin and the VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
• Note that generally the output voltage may increase when a series regulator is used at low load current (0.1 mA or
less).
• Note that generally the output voltage may increase due to the leakage current from an output transistor when a
series regulator is used at high temperature.
• Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for the S-19500/19501 Series. However, be sure to perform sufficient evaluation under
the actual usage conditions for selection, including evaluation of temperature characteristics. Refer to "4. Example
of equivalent series resistance vs. Output current characteristics (Ta = −40°C to +125°C)" in " Reference
Data" for the equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN): 2.2 μF or more
Output capacitor (CL): 2.2 μF or more
• In a series regulator, generally the values of overshoot and undershoot in the output voltage vary depending on the
variation factors of power-on, power supply fluctuation and load fluctuation, or output capacitance.
Determine the conditions of the output capacitor after sufficiently evaluating the temperature characteristics of
overshoot or undershoot in the output voltage with the actual device.
• The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is
small or an input capacitor is not connected.
• Overshoot may occur in the output voltage momentarily if the voltage is rapidly raised at power-on or when the
power supply fluctuates. Sufficiently evaluate the output voltage at that time with the actual device.
• If the VOUT pin is steeply shorted with GND, a negative voltage exceeding the absolute maximum ratings may occur
to the VOUT pin due to resonance of the wiring inductance and the output capacitance in the application. The
negative voltage can be limited by inserting a protection diode between the VOUT pin and the VSS pin or inserting a
series resistor to the output capacitor.
• The application conditions for the input voltage, the output voltage, and the load current should not exceed the power
dissipation.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
• In determining the output current, attention should be paid to the output current value specified in Table 11 in
" Electrical Characteristics" and footnote *7 of the table.
• ABLIC Inc. claims no responsibility for any disputes arising out of or in connection with any infringement by products
including this IC of patents owned by a third party.
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
32
Characteristics (Typical Data)
1. Regulator block
1. 1 Output voltage vs. Output current (When load current increases) (Ta = +25°C)
1. 1. 1
V
OUT = 3.3
V
1. 1. 2
V
OUT = 5.0 V
4.0
0.0
0 600
I
OUT
[mA]
3.0
2.0
1.0
V
OUT
[V]
500400300200100
V
IN
= 3.8 V
V
IN
= 4.3 V
V
IN
= 13.5 V
6.0
0.0
0 600
I
OUT
[mA]
V
OUT
[V]
500400300200100
5.0
4.0
3.0
2.0
1.0
V
IN
= 5.5 V
V
IN
= 6.0 V
V
IN
= 13.5 V
1. 2 Output voltage vs. Input voltage (Ta = +25°C)
1. 2. 1 VOUT = 3.3 V 1. 2. 2 VOUT = 5.0 V
4.0
0.0
018
V
IN
[V]
3.0
2.0
1.0
V
OUT
[V]
1512963
I
OUT
= 1 mA
I
OUT
= 30 mA
I
OUT
= 10 mA
I
OUT
= 100 mA
6.0
0.0
018
V
IN
[V]
V
OUT
[V]
1512963
5.0
4.0
3.0
2.0
1.0
I
OUT
= 1 mA
I
OUT
= 30 mA
I
OUT
= 10 mA
I
OUT
= 100 mA
1. 3 Dropout voltage vs. Output current
1. 3. 1 VOUT = 3.3 V 1. 3. 2 VOUT = 5.0 V
200
0
0 200
I
OUT
[mA]
150
100
50
V
drop
[mV]
15010050
T
j
=
+
125
°C
T
j
=
+
150
°C
T
j
=
+
25
°C
T
j
=
−
40
°C
200
0
0 200
I
OUT
[mA]
150
100
50
V
drop
[mV]
15010050
T
j
=
+
125
°C
T
j
=
+
150
°C
T
j
=
+
25
°C
T
j
=
−
40
°C
1. 4 Dropout voltage vs. Junction temperature
1. 4. 1 VOUT = 3.3 V 1. 4. 2 VOUT = 5.0 V
−25 0 150125100755025−40
T
j
[°C]
0
100
V
drop
[mV]
80
60
40
20
I
OUT
= 30 mA
I
OUT
= 100 mA
−25 0 150125100755025−40
T
j
[°C]
0
100
V
drop
[mV]
80
60
40
20
I
OUT
= 30 mA
I
OUT
= 100 mA
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
33
1. 5 Output voltage vs. Junction temperature
1. 5. 1 VOUT = 3.3 V
VIN = 13.5 V
1. 5. 2 VOUT = 5.0 V
VIN = 13.5 V
−25 0 150125100755025−40
T
j
[°C]
3.0
3.6
V
OUT
[V]
3.5
3.4
3.3
3.2
3.1
−25 0 150125100755025−40
T
j
[°C]
4.7
5.3
V
OUT
[V]
5.2
5.1
5.0
4.9
4.8
1. 6 Ripple rejection (Ta = +25°C)
1. 6. 1 VOUT = 3.3 V
VIN = 13.5 V, CL = 2.2 μF
1. 6. 2 VOUT = 5.0 V
VIN = 13.5 V, CL = 2.2 μF
100 1k 10k
Ripple Rejection [dB]
Frequency [Hz]
10 1M
0
100
100k
80
60
40
20
I
OUT
= 1 mA
I
OUT
= 30 mA
I
OUT
= 100 mA
100 1k 10k
Ripple Rejection [dB]
Frequency [Hz]
10 1M
0
100
100k
80
60
40
20
I
OUT
= 1 mA
I
OUT
= 30 mA
I
OUT
= 100 mA
2. Detector block
2. 1 Detection voltage, Release voltage vs. Junction temperature
2. 1. 1 −
V
DET = 2.6
V
2. 1. 2 −
V
DET = 4.7
V
−25 0 150125100755025−40
T
j
[°C]
2.2
3.2
3.0
2.8
2.6
2.4
−V
DET
,+V
DET
[V]
+V
DET
−V
DET
−25 0 150125100755025−40
T
j
[°C]
4.3
5.3
5.1
4.9
4.7
4.5
−V
DET
,+V
DET
[V]
+V
DET
−V
DET
2. 2 Hysteresis width vs. Junction temperature
2. 2. 1 −
V
DET = 2.6
V
2. 2. 2 −
V
DET = 4.7
V
−25 0 150125100755025−40
T
j
[°C]
0
300
V
HYS
[mV]
250
200
150
100
50
−25 0 150125100755025−40
T
j
[°C]
0
300
V
HYS
[mV]
250
200
150
100
50
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
34
2. 3 Reset output current vs. VDS
2. 3. 1 −
V
DET = 2.6
V
2. 3. 2 −
V
DET = 4.7
V
100
0
0.0 3.0
IRO [mA]
VDS [V]
2.52.01.51.00.5
80
60
40
20
Ta =
+
125
°C
Ta =
+
25
°C
Ta =
−
40
°C
200
0
05
I
RO
[mA]
V
DS
[V]
160
120
80
40
4321
Ta =
+
125
°C
Ta =
+
25
°C
Ta =
−
40
°C
2. 4 Reset output current vs. Output voltage
2. 4. 1 −VDET = 2.6 V
VDS = 0.4 V
2. 4. 2 −VDET = 4.7 V
VDS = 0.4 V
20
0
0.0 3.0
IRO [mA]
VOUT [V]
2.52.01.51.00.5
15
10
5
Ta =
+
125
°C
Ta =
+
25
°C
Ta =
−
40
°C
30
0
05
I
RO
[mA]
V
OUT
[V]
4321
25
20
15
10
5
Ta =
+
125
°C
Ta =
+
25
°C
Ta =
−
40
°C
2. 5 RO pin voltage vs. Output voltage
2. 5. 1 −VDET = 2.6 V
VDS = 0.4 V
2. 5. 2 −VDET = 4.7 V
VDS = 0.4 V
4
0
0.0 3.0
V
RO
[V]
V
OUT
[V]
2.52.01.51.00.5
3
2
1
Tj =
+
125
°C
Tj =
+
150
°C
Tj =
+
25
°C
Tj =
−
40
°C
6
0
05
V
RO
[V]
V
OUT
[V]
4321
5
4
3
2
1
T
j
=
+
125
°C
T
j
=
+
150
°C
T
j
=
+
25
°C
T
j
=
−
40
°C
Remark IRO: Nch transistor output current
V
RO: Nch transistor output voltage
V
DS: Drain-to-source voltage of Nch transistor
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
35
2. 6 Release delay time vs. Junction temperature
2. 6. 1 −
V
DET = 2.6
V
2. 6. 2 −
V
DET = 4.7
V
−25 0 150125100755025−40
T
j
[°C]
0
25
t
rd
[ms]
20
15
10
5
−25 0 150125100755025−40
T
j
[°C]
0
25
t
rd
[ms]
20
15
10
5
2. 7 Release delay time vs. Release delay time and monitoring time adjustment capacitance
2. 7. 1 −
V
DET = 2.6
V
2. 7. 2 −
V
DET = 4.7
V
1000
1000
100
10
1
0.1
100101
t
rd
[ms]
C
DLY
[nF]
T
j
=
+
125
°C
T
j
=
+
150
°C
T
j
=
+
25
°C
T
j
=
−
40
°C
1000
1000
100
10
1
0.1
100101
t
rd
[ms]
C
DLY
[nF]
T
j
=
+
125
°C
T
j
=
+
150
°C
T
j
=
+
25
°C
T
j
=
−
40
°C
2. 8 Reset reaction time vs. Junction temperature
2. 8. 1 −
V
DET = 2.6
V
2. 8. 2 −
V
DET = 4.7
V
−25 0 150125100755025−40
T
j
[°C]
0
25
t
rr
[μs]
20
15
10
5
−25 0 150125100755025−40
T
j
[°C]
0
25
t
rr
[μs]
20
15
10
5
2. 9 Reset reaction time vs. Release delay time and monitoring time adjustment capacitance
2. 9. 1 −
V
DET = 2.6
V
2. 9. 2 −
V
DET = 4.7
V
100
1000
10
1
100101
t
rr
[μs]
C
DLY
[nF]
Tj =
+
125
°C
Tj =
+
150
°C
Tj =
+
25
°C
Tj =
−
40
°C
100
1000
10
1
100101
t
rr
[μs]
C
DLY
[nF]
Tj =
+
125
°C
Tj =
+
150
°C
Tj =
+
25
°C
Tj =
−
40
°C
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
36
3. Watchdog timer block
3. 1 Watchdog trigger time vs. Junction temperature
3. 1. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 1. 2 VOUT = 5.0 V
VIN = 13.5 V
−25 0 150125100755025−40
T
j
[°C]
0
60
t
WI,tr
[ms]
50
40
30
20
10
−25 0 150125100755025−40
T
j
[°C]
0
60
t
WI,tr
[ms]
50
40
30
20
10
3. 2 Watchdog trigger time vs. Release delay time and monitoring time adjustment capacitance
3. 2. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 2. 2 VOUT = 5.0 V
VIN = 13.5 V
1000100101
t
WI,tr
[ms]
C
DLY
[nF]
10000
1000
100
10
1
0.1
+ °C
+ °C
+ °C
− °C
1000100101
t
WI,tr
[ms]
C
DLY
[nF]
10000
1000
100
10
1
0.1
+ °C
+ °C
+ °C
− °C
3. 3 Charge current, discharge current vs. Junction temperature
3. 3. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 3. 2 VOUT = 5.0 V
VIN = 13.5 V
−25 0 150125100755025−40
T
j
[°C]
0
8
I
D,cha
, I
D,dcha
[
μ
A]
6
4
2
I
D,dcha
I
D,cha
−25 0 150125100755025−40
T
j
[°C]
0
8
I
D,cha
,I
D,dcha
[
μ
A]
6
4
2
I
D,dcha
I
D,cha
3. 4 Upper timing threshold voltage, lower watchdog timing threshold voltage, lower reset timing threshold voltage vs. Junction temperature
3. 4. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 4. 2 VOUT = 5.0 V
VIN = 13.5 V
−25 0 150125100755025−40
T
j
[°C]
0.0
2.5
V
DU
, V
DWL
, V
DRL
[V]
2.0
1.5
1.0
0.5
V
DWL
V
DRL
V
DU
−25 0 150125100755025−40
T
j
[°C]
0.0
2.5
2.0
1.5
1.0
0.5
V
DU
, V
DWL
, V
DRL
[V]
V
DWL
V
DRL
V
DU
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
37
3. 5 Watchdog activation threshold current, watchdog deactivation threshold
current vs. Junction temperature
3. 5. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 5. 2 VOUT = 5.0 V
VIN = 13.5 V
−25 0 150125100755025−40
T
j
[°C]
0.0
3.0
I
O,WDact
, I
O,WDdeact
[mA]
2.5
2.0
1.5
1.0
0.5 I
O,WDdeact
I
O,WDact
−25 0 150125100755025−40
T
j
[°C]
0.0
3.0
I
O,WDact
, I
O,WDdeact
[mA]
2.5
2.0
1.5
1.0
0.5 I
O,WDdeact
I
O,WDact
3. 6 Watchdog activation
threshold
current, Watchdog deactivation
threshold
current
vs. Watchdog activation threshold current adjustment resistance (Ta = +25°C)
3. 6. 1 VOUT = 3.3 V
VIN = 13.5 V
3. 6. 2 VOUT = 5.0 V
VIN = 13.5 V
100
10000
0
100010010
I
O,WDact
, I
O,WDdeact
[mA]
R
WADJ,ext
[kΩ]
80
60
40
20
I
O,WDdeact
I
O,WDact
100
10000
0
100010010
I
O,WDact
,I
O,WDdeact
[mA]
R
WADJ,ext
[kΩ]
80
60
40
20
I
O,WDdeact
I
O,WDact
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
38
4. Overall
4. 1 Current consumption during operation vs. Input voltage
4. 1. 1 VOUT = 3.3 V, −VDET = 2.6 V
When watchdog timer is deactivated
4. 1. 2 VOUT = 5.0 V, −VDET = 4.7 V
When watchdog time
r
is deactivated
300
0
018
I
SS1
[μA]
V
IN
[V]
15963
250
200
150
100
50
12
+ °C
+ °C
+ °C
− °C
300
0
I
SS1
[μA]
V
IN
[V]
250
200
150
100
50
0181596312
+ °C
+ °C
+ °C
− °C
4. 2 Current consumption during operation vs. Output current
4. 2. 1 VOUT = 3.3 V, −VDET = 2.6 V
VIN = 13.5 V, WADJ pin is open
4. 2. 2 VOUT = 5.0 V, −VDET = 4.7 V
VIN = 13.5 V, WADJ pin is open
160
0
0 200
I
SS1
[μA]
I
OUT
[mA]
1601208040
120
80
40
Ta =
+
125
°C
Ta =
−
40
°C
Ta =
+
25
°C
160
0
0 200
I
SS1
[μA]
I
OUT
[mA]
1601208040
120
80
40
Ta =
+
125
°C
Ta =
−
40
°C
Ta =
+
25
°C
4. 3 Current consumption during operation vs. Junction temperature
4. 3. 1 VOUT = 3.3 V, −VDET = 2.6 V
VIN = 13.5 V, WADJ pin is open
4. 3. 2 VOUT = 5.0 V, −VDET = 4.7 V
VIN = 13.5 V, WADJ pin is open
160
0
I
SS1
[μA]
120
80
40
−25 0 150125100755025−40
T
j
[°C]
I
OUT
= 50 mA
I
OUT
= 5 mA
I
OUT
= 200 mA
160
0
I
SS1
[μA]
120
80
40
−25 0 150125100755025−40
T
j
[°C]
I
OUT
= 50 mA
I
OUT
= 5 mA
I
OUT
= 200 mA
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.7_00 S-19500/19501 Series
39
Reference Data
1. Characteristics of input transient response (Ta = +25°C)
1. 1 VOUT = 3.3 V
I
OUT
= 30 mA, C
L
= 2.2
μ
F, V
IN
= 11.5 V
↔
13.5 V, t
r
= t
f
= 5.0
μ
s
1. 2 VOUT = 5.0 V
I
OUT
= 30 mA, C
L
= 2.2
μ
F, V
IN
= 11.5 V
↔
13.5 V, t
r
= t
f
= 5.0
μ
s
3.8
3.2
−100 500
V
OUT
[V]
4003002001000
3.7
3.6
3.5
3.4
3.3
t [μs]
14
8
13
12
11
10
9
V
IN
[V]
V
OUT
V
IN
6.0
4.8
−100 500
V
OUT
[V]
4003002001000
5.8
5.6
5.4
5.2
5.0
t [μs]
14
8
13
12
11
10
9
V
IN
[V]
V
OUT
V
IN
2. Characteristics of load transient response (Ta = +25°C)
2. 1 VOUT = 3.3 V
VIN = 13.5 V, CL = 2.2 μF, IOUT = 50 mA ↔ 100 mA
2. 2 VOUT = 5.0 V
VIN = 13.5 V, CL = 2.2 μF, IOUT = 50 mA ↔ 100 mA
3.7
3.1
−100 500
V
OUT
[V]
4003002001000
3.6
3.5
3.4
3.3
3.2
t [μs]
150
−150
100
50
0
−50
−100
I
OUT
[mA]
V
OUT
I
OUT
5.8
4.6
−100 500
VOUT [V]
4003002001000
5.6
5.4
5.2
5.0
4.8
t [μs]
150
−150
100
50
0
−50
−100
IOUT [mA]
VOUT
IOUT
3. Load dump characteristics (Ta = +25°C)
3. 1 VOUT = 5.0 V
I
OUT
= 0.1 mA, V
IN
= 13.5 V
↔
45.0 V, C
IN
= C
L
= 2.2
μ
F
6.0
4.8
−0.1 0.9
VOUT [V]
0.40.30.20.10
5.8
5.6
5.4
5.2
5.0
t [s]
50
−10
40
30
20
10
0
VIN [V]
0.5 0.6 0.7 0.8
VOUT
VIN
4. Example of equivalent series resistance vs. Output current characteristics (Ta =
−
40°C to
+
125°C)
CIN = CL = 2.2 μF, CDLY = 47 nF
10
0.1 200
I
OUT
[mA]
R
ESR
[Ω]
0
Stable
CIN
VIN
VSS
CL*1
RESR
S-19500
Series
VOUT
WO / RO
WEN
WI
DLY
CDLY
WADJ
*1. CL: Murata Manufacturing Co., Ltd.
GCM31CR71H225K (2.2 μF)
Figure 44 Figure 45
AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 200 mA, BUILT-IN WATCHDOG TIMER VOLTAGE REGULATOR WITH RESET FUNCTION
S-19500/19501 Series Rev.1.7_00
40
Power Dissipation
0 25 50 75 100 125 150 175
0
1
2
3
4
5
Ambient temperature (Ta) [°C]
Power dissipation (P
D
) [W]
T
j
= +150°C max.
HSOP-8A
E
D
C
B
A
Board Power Dissipation (PD)
A 1.20 W
B 1.69 W
C 3.21 W
D 3.38 W
E 4.03 W
(1)
1
2
3
4
(2)
1
2
3
4
(3)
1
2
3
4
Board A
Board B
Board C
Thermal via Number: 4
Diameter: 0.3 mm
Number of copper foil layer 4
Copper foil layer [mm]
Land pattern and wiring for testing: t0.070
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.070
Material FR-4
Thermal via -
Item Specification
Copper foil layer [mm]
Land pattern and wiring for testing: t0.070
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.070
Size [mm] 114.3 x 76.2 x t1.6
Size [mm] 114.3 x 76.2 x t1.6
Material FR-4
Number of copper foil layer 4
Copper foil layer [mm]
Land pattern and wiring for testing: t0.070
-
-
Item Specification
74.2 x 74.2 x t0.070
Size [mm] 114.3 x 76.2 x t1.6
Item Specification
Thermal via -
Material FR-4
Number of copper foil layer 2
ICMountArea
enlargedview
HSOP-8A Test Board
No. HSOP8A-A-Board-SD-1.0
ABLIC Inc.
(4)
1
2
3
4
(5)
1
2
3
4
Size [mm] 114.3 x 76.2 x t1.6
Material FR-4
Item Specification
Number of copper foil layer 4
Copper foil layer [mm]
Pattern for heat radiation: 2000mm2 t0.070
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.070
74.2 x 74.2 x t0.070
Size [mm] 114.3 x 76.2 x t1.6
Material FR-4
Thermal via -
Item Specification
Board D
Board E
Thermal via Number: 4
Diameter: 0.3 mm
Number of copper foil layer 4
Copper foil layer [mm]
Pattern for heat radiation: 2000mm
2
t0.070
74.2 x 74.2 x t0.035
74.2 x 74.2 x t0.035
enlargedview
ICMountArea
HSOP-8A Test Board
No. HSOP8A-A-Board-SD-1.0
ABLIC Inc.
ABLIC Inc.
No.
TITLE
UNIT
ANGLE
No. FH008-A-P-SD-2.0
mm
HSOP8A-A-PKG Dimensions
FH008-A-P-SD-2.0
0.4±0.05
1.27
5.02±0.2
14
85 58
41
3.0
0.20±0.05
ABLIC Inc.
No.
TITLE
UNIT
ANGLE
mm
5
8
1
4
ø2.0±0.05
ø1.5 0.3±0.05
2.1±0.1
8.0±0.1
6.7±0.1
2.0±0.05
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
HSOP8A-A-Carrier Tape
No. FH008-A-C-SD-1.0
FH008-A-C-SD-1.0
+0.1
-0.0
ABLIC Inc.
No.
TITLE
UNIT
ANGLE
mm
QTY. 4,000
HSOP8A-A-Reel
No. FH008-A-R-SD-1.0
FH008-A-R-SD-1.0
2±0.5
ø13±0.2
ø21±0.8
Enlarged drawing in the central part
17.4±1.0
13.4±1.0
ABLIC Inc.
No.
TITLE
UNIT
ANGLE
mm
HSOP8A-A
-Land Recommendation
FH008-A-L-SD-1.0
1.27
0.76
1.27 1.27
3.2
No. FH008-A-L-SD-1.0
Disclaimers (Handling Precautions)
1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and
application circuit examples, etc.) is current as of publishing date of this document and is subject to change without
notice.
2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
ABLIC Inc. is not liable for any losses, damages, claims or demands caused by the reasons other than the products
described herein (hereinafter "the products") or infringement of third-party intellectual property right and any other
right due to the use of the information described herein.
3. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by the incorrect information described
herein.
4. Be careful to use the products within their ranges described herein. Pay special attention for use to the absolute
maximum ratings, operation voltage range and electrical characteristics, etc.
ABLIC Inc. is not liable for any losses, damages, claims or demands caused by failures and / or accidents, etc. due to
the use of the products outside their specified ranges.
5. Before using the products, confirm their applications, and the laws and regulations of the region or country where they
are used and verify suitability, safety and other factors for the intended use.
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life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control
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ABLIC, Inc. Do not apply the products to the above listed devices and equipments.
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9. In general, semiconductor products may fail or malfunction with some probability. The user of the products should
therefore take responsibility to give thorough consideration to safety design including redundancy, fire spread
prevention measures, and malfunction prevention to prevent accidents causing injury or death, fires and social
damage, etc. that may ensue from the products' failure or malfunction.
The entire system in which the products are used must be sufficiently evaluated and judged whether the products are
allowed to apply for the system on customer's own responsibility.
10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the
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careful when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.
13. The information described herein contains copyright information and know-how of ABLIC Inc. The information
described herein does not convey any license under any intellectual property rights or any other rights belonging to
ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any part of this
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the English language and the Chinese language, shall be controlling.
2.4-2019.07
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