© Semiconductor Components Industries, LLC, 2014
May, 2014 − Rev. 26 1Publication Order Number:
NCP302/D
NCP302, NCP303
Voltage Detector Series
with Programmable Delay
The NCP302 and NCP303 series are second generation ultra−low
current voltage detectors that contain a programmable time delay
generator. These devices are specifically designed for use as reset
controllers in portable microprocessor based systems where extended
battery life is paramount.
Each series features a highly accurate undervoltage detector with
hysteresis and an externally programmable time delay generator. This
combination of features prevents erratic system reset operation.
The NCP302 series consists of complementary output devices that
are available with either an active high or active low reset. The
NCP303 series has an open drain N−Channel output with an active low
reset output.
Features
•Quiescent Current of 0.5 mA Typical
•High Accuracy Undervoltage Threshold of 2.0%
•Externally Programmable Time Delay Generator
•Wide Operating Voltage Range of 0.8 V to 10 V
•Complementary or Open Drain Output
•Active Low or Active High Reset
•Specified Over the −40°C to +125°C Temperature Range
(Except for Voltage Options from 0.9 to 1.1 V)
•NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
•These Devices are Pb−Free and are RoHS Compliant
Typical Applications
•Microprocessor Reset Controller
•Low Battery Detection
•Power Fail Indicator
•Battery Backup Detection
Figure 1. Representative Block Diagrams
This device contains 28 active transistors.
NCP303LSNxxT1
Open Drain Output Configuration
NCP302xSNxxT1
Complementary Output Configuration
* Inverter for active low devices.
* Buffer for active high devices.
Vref
2 Input
1
Reset
Output
3 GND 5C
D
RD
*Vref
2 Input
3 GND 5C
D
RD
1 Reset Outp
ut
See detailed ordering and shipping information in the ordering
information section on page 22 of this data sheet.
ORDERING INFORMATION
TSOP−5/
SOT23−5
CASE 483
PIN CONNECTIONS
1
3N.C.
Reset
Output
2
Input
Ground 4
CD
5
(Top View)
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1
5
xxx AYWG
G
MARKING
DIAGRAM
xxx = Specific Device Code
A = Assembly Location
Y = Year
W = Work Week
G= Pb−Free Package
1
5
(Note: Microdot may be in either location)
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MAXIMUM RATINGS
Rating Symbol Value Unit
Input Power Supply Voltage (Pin 2) Vin 12 V
Delay Capacitor Pin Voltage (Pin 5) VCD −0.3 to Vin + 0.3 V
Output Voltage (Pin 1)
Complementary, NCP302
N−Channel Open Drain, NCP303
VOUT −0.3 to Vin + 0.3
−0.3 to 12
V
Output Current (Pin 1) (Note 2) IOUT 70 mA
Thermal Resistance Junction−to−Air RqJA 250 °C/W
Maximum Junction Temperature TJ+150 °C
Operating Ambient Temperature Range
All Voltage Options: 0.9 V to 1.1 V
All Voltage Options: 1.2 V to 4.9 V TA
TA−40 to +85
−40 to +125 °C
°C
Storage Temperature Range Tstg −55 to +150 °C
Moisture Sensitivity Level MSL 1
Latchup Performance (Note 3)
Positive
Negative
ILATCHUP 200
200
mA
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be af fected.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.
2. The maximum package power dissipation limit must not be exceeded.
PD+TJ(max) *TA
RqJA
3. Maximum ratings per JEDEC standard JESD78.
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ELECTRICAL CHARACTERISTICS (For all values TA = −40°C to +125°C, unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
NCP302/3 − 0.9 (TA = 255C for voltage options from 0.9 to 1.1 V)
Detector Threshold (Pin 2, Vin Decreasing) VDET− 0.882 0.900 0.918 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.027 0.045 0.063 V
Supply Current (Pin 2)
(Vin = 0.8 V)
(Vin = 2.9 V)
Iin −
−0.20
0.45 0.6
1.2
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2)
(TA= −40°C to 85°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 0.85V) 0.01
0.05 0.05
0.50 −
−
Pch Source Current, NCP302
(VOUT = 2.4V, Vin = 4.5V) 1.0 6.0 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 1.5 V) 1.05 2.5 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 0.8 V) 0.011
0.014 0.04
0.08 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 0.99 V) VTCD 0.50 0.67 0.84 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 0.85 V, VCD = 0.5V)
ICD 2.0
10 120
300 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3 − 1.8
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 1.764
1.746 1.800
−1.836
1.854 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.054 0.090 0.126 V
Supply Current (Pin 2)
(Vin = 1.7 V)
(Vin = 3.8 V)
Iin −
−0.23
0.48 0.7
1.3
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.05
2.0 −
−
Pch Source Current, NCP302
(VOUT = 2.4V, Vin = 4.5V) 1.0 6.0 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 1.98 V) VTCD 0.99 1.34 1.68 V
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ELECTRICAL CHARACTERISTICS (continued) (For all values TA = −40°C to +125°C, unless otherwise noted.)
Characteristic UnitMaxTypMinSymbol
NCP302/3 − 1.8
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 120
1600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3 − 2.0
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 1.96
1.94 2.00
−2.04
2.06 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.06 0.10 0.14 V
Supply Current (Pin 2)
(Vin = 1.9 V)
(Vin = 4.0 V)
Iin −
−0.23
0.48 0.8
1.3
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.14
3.5 −
−
Pch Source Current, NCP302
(VOUT = 2.4V, Vin = 4.5V) 1.0 9.7 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 2.2 V) VTCD 1.10 1.49 1.87 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 250
3600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3− 2.7
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 2.646
2.619 2.700
−2.754
2.781 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.081 0.135 0.189 V
Supply Current (Pin 2)
(Vin = 2.6 V)
(Vin = 4.7 V)
Iin −
−0.25
0.50 0.8
1.3
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.14
3.5 −
−
Pch Source Current, NCP302
(VOUT = 2.4V, Vin = 4.5V) 1.0 9.7 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
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ELECTRICAL CHARACTERISTICS (continued) (For all values TA = −40°C to +125°C, unless otherwise noted.)
Characteristic UnitMaxTypMinSymbol
NCP302/3− 2.7
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 2.97 V) VTCD 1.49 2.01 2.53 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 250
3600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3 − 3.0
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 2.94
2.91 3.00
−3.06
3.09 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.09 0.15 0.21 V
Supply Current (Pin 2)
(Vin = 2.87 V)
(Vin = 5.0 V)
Iin −
−0.25
0.50 0.9
1.3
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.14
3.5 −
−
Pch Source Current, NCP302
(VOUT = 2.4V, Vin = 4.5V) 1.0 9.7 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 3.3 V) VTCD 1.65 2.23 2.81 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 250
3600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3 − 4.5
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 4.410
4.365 4.500
−4.590
4.635 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.135 0.225 0.315 V
Supply Current (Pin 2)
(Vin = 4.34 V)
(Vin = 6.5 V)
Iin −
−0.33
0.52 1.0
1.4
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.05
2.0 −
−
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ELECTRICAL CHARACTERISTICS (continued) (For all values TA = −40°C to +125°C, unless otherwise noted.)
Characteristic UnitMaxTypMinSymbol
NCP302/3 − 4.5
Pch Source Current, NCP302
(VOUT = 5.9V, Vin = 8.0V) 1.5 10.5 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 4.95 V) VTCD 2.25 3.04 3.83 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 120
1600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
NCP302/3 − 4.7
Detector Threshold (Pin 2, Vin Decreasing) (TA= 25°C)
(TA= −40°C to 125°C) VDET− 4.606
4.559 4.700
−4.794
4.841 V
Detector Threshold Hysteresis (Pin 2, Vin Increasing) VHYS 0.141 0.235 0.329 V
Supply Current (Pin 2)
(Vin = 4.54 V)
(Vin = 6.7 V)
Iin −
−0.34
0.53 1.0
1.4
mA
Maximum Operating Voltage (Pin 2) Vin(max) − − 10 V
Minimum Operating Voltage (Pin 2) (TA= 25°C)
(TA= −40°C to 125°C) Vin(min) −
−0.55
0.65 0.70
0.80 V
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.05V, Vin = 0.70V)
(VOUT = 0.50V, Vin = 1.5V) 0.01
1.0 0.05
2.0 −
−
Pch Source Current, NCP302
(VOUT = 5.9V, Vin = 8.0V) 1.5 10.5 −
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices) IOUT mA
Nch Sink Current, NCP302, NCP303
(VOUT = 0.5 V, Vin = 5.0 V) 6.3 11 −
Pch Source Current, NCP302
(VOUT = 0.4 V, Vin = 0.7 V)
(VOUT = GND, Vin = 1.5 V) 0.011
0.525 0.04
0.6 −
−
CD Delay Pin Threshold Voltage (Pin 5)
(Vin = 5.17 V) VTCD 2.59 3.49 4.40 V
Delay Capacitor Pin Sink Current (Pin 5)
(Vin = 0.7 V, VCD = 0.1V)
(Vin = 1.5 V, VCD = 0.5V)
ICD 2.0
200 120
1600 −
−
mA
Delay Pullup Resistance (Pin 5) RD0.5 1.0 2.0 MW
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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0.7 V
GND
5.0 V
2.5 V
GND
VDET+ + 2.0 V
NCP303LNCP302L
tD2
Input Voltage,
Pin 2
0.7 V
GND
GND
VDET+ + 2.0 V
tD2
VDET+ + 2.0 V
VDET+ + 2.0 V
2
Reset Output
Voltage, Pin 1
NCP302 and NCP303 series are measured with a 10 pF capacitive load. NCP303 has an additional 470 k pullup resistor
connected from the reset output to +5.0 V. The reset output voltage waveforms are shown for the active low ‘L’ devices. Output
time delay tD1 and tD2 are dependent upon the delay capacitance. Refer to Figures 30, 31, and 32. The upper detector
threshold, VDET+ is the sum of the lower detector threshold, VDET− plus the input hysteresis, VHYS.
Figure 2. Measurement Conditions for tD1 and tD2
tD1 tD1
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Table 1. ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V
NCP302 Series Detector Threshold Detector Threshold
Hysteresis
Supply Current Nch Sink Current Pch
Source
Current
Vin Low Vin High Vin Low Vin High
VDET− (V) (Note 4) VHYS (V) Iin (mA)
(Note 5) Iin (mA)
(Note 6) IOUT (mA)
(Note 7) IOUT (mA)
(Note 8) IOUT(mA)
(Note 9)
Part Number Min Typ Max Min Typ Max Typ Typ Typ Typ Typ
NCP302LSN09T1 0.882 0.9 0.918 0.027 0.045 0.063 0.20 0.45 0.05 0.5 2.0
NCP302LSN15T1 1.470 1.5 1.530 0.045 0.075 0.105
NCP302LSN18T1 1.764 1.8 1.836 0.054 0.090 0.126 0.23 0.48
NCP302LSN20T1 1.960 2.0 2.040 0.060 0.100 0.140
NCP302LSN27T1 2.646 2.7 2.754 0.081 0.135 0.189 0.25 0.50
NCP302LSN30T1, 2.940 3.0 3.060 0.090 0.150 0.210
NCV302LSN30T1, 2.940 3.0 3.060 0.090 0.150 0.210
NCP302LSN33T1 3.234 3.3 3.366 0.099 0.165 0.231
NCP302LSN38T1 3.724 3.8 3.876 0.114 0.190 0.266
NCP302LSN40T1 3.920 4.0 4.080 0.120 0.200 0.280 3.0
NCP302LSN43T1 4.214 4.3 4.386 0.129 0.215 0.301
NCP302LSN45T1 4.410 4.5 4.590 0.135 0.225 0.315 0.33 0.52
NCP302LSN47T1 4.606 4.7 4.794 0.141 0.235 0.329 0.34 0.53
4. Values shown apply at +25°C only. For voltage options greater than 1.1 V, VDET− limits over operating temperature range (−40°C to +125°C)
are VNOM ±3%. For voltage options < 1.2 V, VDET− is guaranteed only at +25°C.
5. Condition 1: 0.9 — 2.9 V, Vin = VDET− − 0.10 V; 3.0 — 3.9 V, Vin = VDET− − 0.13 V; 4.0 — 4.9 V, Vin = VDET− − 0.16 V
6. Condition 2: 0.9 — 4.9 V, Vin = VDET− + 2.0 V
7. Condition 3: 0.9 — 4.9 V, Vin = 0.7 V, VOUT = 0.05 V, Active Low ‘L’ Suffix Devices
8. Condition 4: 0.9 — 1.0 V, Vin = 0.85 V, VOUT = 0.5 V; 1.1 — 1.5 V, Vin = 1.0 V, VOUT = 0.5 V ; 1.6 — 4.9 V, Vin = 1.5 V, VOUT = 0.5 V,
Condition 4: Active Low ‘L’ Suffix Devices
9. Condition 5: 0.9 — 3.9 V, Vin = 4.5 V, VOUT = 2.4 V; 4.0 — 4.9 V, Vin = 8.0 V, VOUT = 5.9 V, Active Low ‘L’ Suffix Devices
Table 2. ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V
NCP302 Series Detector Threshold Detector Threshold
Hysteresis
Supply Current Nch Sink
Current
Pch Source Current
Vin Low Vin High Vin Low Vin High
VDET− (V) (Note 10) VHYS (V) Iin (mA)
(Note 11) Iin (mA)
(Note 12) IOUT (mA)
(Note 13) IOUT (mA)
(Note 14) IOUT (mA)
(Note 15)
Part Number Min Typ Max Min Typ Max Typ Typ Typ Typ Typ
NCP302HSN09T1 0.882 0.9 0.918 0.027 0.045 0.063 0.20 0.45 2.5 0.04 0.08
NCP302HSN18T1 1.764 1.8 1.836 0.054 0.090 0.126 0.23 0.48
NCP302HSN27T1 2.646 2.7 2.754 0.081 0.135 0.189 0.25 0.50
NCP302HSN30T1 2.940 3.0 3.060 0.090 0.150 0.210
NCP302HSN40T1 3.920 4.0 4.080 0.120 0.200 0.280
NCP302HSN45T1 4.410 4.5 4.590 0.135 0.225 0.315 0.33 0.52
10.Values shown apply at +25°C only. For voltage options greater than 1.1 V, VDET− limits over operating temperature range (−40°C to +125°C)
are VNOM ±3%. For voltage options < 1.2 V, VDET− is guaranteed only at +25°C.
11.Condition 1: 0.9 — 2.9 V, Vin = VDET− − 0.10 V; 3.0 — 3.9 V, Vin = VDET− − 0.13 V; 4.0 — 4.9 V, Vin = VDET− − 0.16 V
12.Condition 2: 0.9 — 4.9 V, Vin = VDET− + 2.0 V
13.Condition 3: 0.9 — 1.4 V, Vin = 1.5 V, VOUT = 0.5 V; 1.5 — 4.9 V, Vin = 5.0 V, VOUT = 0.5 V, Active High ‘H’ Suf fix Devices
14.Condition 4: 0.9 — 4.9 V, Vin = 0.7 V, VOUT = 0.4 V, Active High ‘H’ Suffix Devices
15.Condition 5: 0.9 — 1.0 V, Vin = 0.8 V, VOUT = GND; 1.1 — 1.5 V, Vin = 1.0 V, VOUT = GND; 1.6 — 4.9 V, Vin = 1.5 V, VOUT = GND,
Active High ‘H’ Suffix Devices
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Table 3. ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V
NCP303 Series Detector Threshold Detector Threshold
Hysteresis
Supply Current Nch Sink Current
Vin Low Vin High Vin Low Vin High
VDET− (V) (Note 16) VHYS (V) Iin (mA)
(Note 17) Iin (mA)
(Note 18) IOUT (mA)
(Note 19) IOUT (mA)
(Note 20)
Part Number Min Typ Max Min Typ Max Typ Typ Typ Typ
NCP303LSN09T1 0.882 0.9 0.918 0.027 0.045 0.063 0.20 0.45 0.05 0.5
NCP303LSN10T1 0.980 1.0 1.020 0.030 0.050 0.070
NCP303LSN11T1 1.078 1.1 1.122 0.033 0.055 0.077 1.0
NCP303LSN13T1 1.274 1.3 1.326 0.039 0.065 0.091
NCP303LSN14T1 1.372 1.4 1.428 0.042 0.070 0.098
NCP303LSN15T1 1.470 1.5 1.530 0.045 0.075 0.105
NCP303LSN16T1 1.568 1.6 1.632 0.048 0.080 0.112 2.0
NCP303LSN17T1 1.666 1.7 1.734 0.051 0.085 0.119
NCP303LSN18T1 1.764 1.8 1.836 0.054 0.090 0.126 0.23 0.48
NCP303LSN20T1 1.960 2.0 2.040 0.060 0.100 0.140
NCP303LSN22T1 2.156 2.2 2.244 0.066 0.110 0.154
NCP303LSN23T1 2.254 2.3 2.346 0.069 0.115 0.161
NCP303LSN24T1 2.352 2.4 2.448 0.072 0.120 0.168
NCP303LSN25T1 2.450 2.5 2.550 0.075 0.125 0.175
NCP303LSN26T1 2.548 2.6 2.652 0.078 0.130 0.182
NCP303LSN27T1 2.646 2.7 2.754 0.081 0.135 0.189 0.25 0.50
NCP303LSN28T1 2.744 2.8 2.856 0.084 0.140 0.196
NCP303LSN29T1 2.842 2.9 2.958 0.087 0.145 0.203
NCP303LSN30T1 2.940 3.0 3.060 0.090 0.150 0.210
NCP303LSN31T1 3.038 3.1 3.162 0.093 0.155 0.217
NCP303LSN32T1 3.136 3.2 3.264 0.096 0.160 0.224
NCP303LSN33T1 3.234 3.3 3.366 0.099 0.165 0.231
NCP303LSN34T1 3.332 3.4 3.468 0.102 0.170 0.238
NCP303LSN36T1 3.528 3.6 3.672 0.108 0.180 0.252
NCP303LSN38T1 3.724 3.8 3.876 0.114 0.190 0.266
NCP303LSN40T1 3.920 4.0 4.080 0.120 0.200 0.280
NCP303LSN42T1 4.116 4.2 4.284 0.126 0.210 0.294
NCP303LSN44T1 4.312 4.4 4.488 0.132 0.220 0.308
NCP303LSN45T1 4.410 4.5 4.590 0.135 0.225 0.315 0.33 0.52
NCP303LSN46T1 4.508 4.6 4.692 0.138 0.230 0.322
NCP303LSN47T1 4.606 4.7 4.794 0.141 0.235 0.329 0.34 0.53
NCP303LSN49T1 4.802 4.9 4.998 0.147 0.245 0.343
16.Values shown apply at +25°C only. For voltage options greater than 1.1 V, VDET− limits over operating temperature range (−40°C to +125°C)
are VNOM ±3%. For voltage options < 1.2 V, VDET− is guaranteed only at +25°C.
17.Condition 1: 0.9 — 2.9 V, Vin = VDET− − 0.10 V; 3.0 — 3.9 V, Vin = VDET− − 0.13 V; 4.0 — 4.9 V, Vin = VDET− − 0.16 V
18.Condition 2: 0.9 — 4.9 V, Vin = VDET− + 2.0 V
19.Condition 3: 0.9 — 4.9 V, Vin = 0.7 V, VOUT = 0.05 V, Active Low ‘L’ Suffix Devices
20.Condition 4: 0.9 — 1.0 V, Vin = 0.85 V, VOUT = 0.5 V; 1.1 — 1.5 V, Vin = 1.0 V, VOUT = 0.5 V; 1.6 — 4.9 V, Vin = 1.5 V, VOUT = 0.5 V,
Condition 4: Active Low ‘L’ Suffix Devices
NCP302, NCP303
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Figure 3. NCP302/3 Series 0.9 V
Input Current vs. Input Voltage Figure 4. NCP302/3 Series 2.7 V
Input Current vs. Input Voltage
Figure 5. NCP302/3 Series 4.5 V
Input Current vs. Input Voltage Figure 6. NCP302/3 Series 0.9 V
Detector Threshold Voltage vs. Temperature
Figure 7. NCP302/3 Series 2.7 V
Detector Threshold Voltage vs. Temperature Figure 8. NCP302/3 Series 4.5 V
Detector Threshold Voltage vs. Temperature
Iin, INPUT CURRENT (mA)
Vin, INPUT VOLTAGE (V)
TA = 25°C
0
0.1
0.2
0.3
0.4
0.5
0.6
0 2.0 4.0 6.0 8.0 12
−50
TA, AMBIENT TEMPERATURE (°C)
1.00
0.95
0.85
−25 025 50 75 10
0
0.90
0.80
VDET, DETECTOR THRESHOLD VOLTAGE (V)
VDET+
VDET−
V
DET
, DETECTOR THRESHOLD VOLTAGE (V)
2.90
2.80
2.70
2.60
−50 −25 025 50 75 125
TA, AMBIENT TEMPERATURE (°C)
2.65
2.75
2.85
VDET+
VDET−
Iin, INPUT CURRENT (mA)
TA = 25°C
02.0 6.0 8.0 1
2
2.0
1.5
1.0
0.5
0
Vin, INPUT VOLTAGE (V)
4.0
2.5
10.5
10
100
Iin, INPUT CURRENT (mA)
TA = 25°C
0 2.0 1210
2.0
1.5
1.0
0.5
0
Vin, INPUT VOLTAGE (V)
8.0
2.5
6.0
17.2
4.0
VDET, DETECTOR THRESHOLD VOLTAGE (V)
−50
4.9
TA, AMBIENT TEMPERATURE (°C)
4.8
4.7
4.6
4.4
−25 025 50 75 1
25
4.5
4.3
VDET+
VDET−
100
0.7
0.8
0.9
1.0
10
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Figure 9. NCP302L/3L Series 0.9 V
Reset Output Voltage vs. Input Voltage Figure 10. NCP302L/3L Series 2.7 V
Reset Output Voltage vs. Input Voltage
Figure 11. NCP302L/3L Series 4.5 V
Reset Output Voltage vs. Input Voltage Figure 12. NCP302H/3L Series 0.9 V
Reset Output Sink Current vs. Input Voltage
Figure 13. NCP302H/3L Series 2.7 V
Reset Output Sink Current vs. Input Voltage Figure 14. NCP302H/3L Series 4.5 V
Reset Output Sink Current vs. Input Voltage
Vin, INPUT VOLTAGE (V)
00.2 0.4 0.6 0.8
1.0
0.8
0.6
0.4
0.2
01.0
V
OUT
, OUTPUT VOLTAGE (V)
IOUT, OUTPUT SINK CURRENT (mA)
Vin, INPUT VOLTAGE (V)
1.2
0.8
0.4
0
0.2
0.6
1.0
1.6
00.2 0.4 0.6 0.8 1
.0
TA = 25°C
TA = −40°C
TA = 85°C
1.4 VOUT = 0.5 V
I
OUT
, OUTPUT SINK CURRENT (mA)
Vin, INPUT VOLTAGE (V)
0
10
6.0
2.0
0.5 1.0 1.5 2.0 2.5 3.0
4.0
0
8.0
TA = 25°C
TA = −40°C
TA = 125°C
VOUT = 0.5 V
12
VOUT, OUTPUT VOLTAGE (V)
01.0 1.5 2.0 2.5
3.5
2.0
1.5
1.0
0.5
03
.5
Vin, INPUT VOLTAGE (V)
0.5
2.5
TA = −40°C (303L only)
TA = 125°C (303L only)
TA = 25°C (303L only)
3.0
3.0
V
OUT
, OUTPUT VOLTAGE (V)
01.0 2.0 3.0 4.0
5.0
4.0
3.0
2.0
1.0
05.0
6.0
6.0
Vin, INPUT VOLTAGE (V)
TA = −40°C (303L only)
TA = 25°C (303L only)
IOUT, OUTPUT SINK CURRENT (mA)
Vin, INPUT VOLTAGE (V)
01.0 2.0 3.0 4.0 5
.0
20
5.0
0
10 TA = 25°C
TA = −40°C
TA = 125°C
VOUT = 0.5 V
15
TA = −40°C (303L only)
TA = 25°C (303L only)
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Figure 15. NCP302L Series 0.9 V
Reset Output Source Current vs. Input Voltage Figure 16. NCP302L Series 2.7 V
Reset Output Source Current vs. Input Voltage
Figure 17. NCP302L Series 4.5 V
Reset Output Source Current vs. Input Voltage Figure 18. NCP302H/3L Series 0.9 V
Reset Output Sink Current vs. Output Voltage
Figure 19. NCP302H/3L Series 2.7 V
Reset Output Sink Current vs. Output Voltage Figure 20. NCP302H/3L Series 4.5 V
Reset Output Sink Current vs. Output Voltage
20
5.0
002.0 4.0 6.0 8.0 10
Vin, INPUT VOLTAGE (V)
10
15
VOUT = Vin −2.1 V
Vin −1.5 V
Vin −1.0 V
Vin −0.5 V
TA = 25°C
IOUT, OUTPUT SOURCE CURRENT (mA
)
IOUT, OUTPUT SINK CURRENT (mA)
0
VOUT, OUTPUT VOLTAGE (V)
0.2 0.4 0.6 0.8 1
.0
1.5
0.5
0
1.0 Vin = 0.85 V
TA = 25°C
Vin = 0.7 V
I
OUT
, OUTPUT SINK CURRENT (mA)
15
10
5.0
000.5 1.0 1.5 2.0 2.5
VOUT, OUTPUT VOLTAGE (V)
Vin = 2.5 V
Vin = 2.0 V
Vin = 1.5 V
TA = 25°C
IOUT, OUTPUT SOURCE CURRENT (mA)
15
002.0 4.0 6.0 8.0 1
0
Vin, INPUT VOLTAGE (V)
5.0
10
20
VOUT = Vin −2.1 V
Vin −1.5 V
Vin −1.0 V
Vin −0.5 V
TA = 25°C
I
OUT
, OUTPUT SOURCE CURRENT (mA)
15
002.0 4.0 6.0 8.0 10
Vin, INPUT VOLTAGE (V)
5.0
10
20 VOUT = Vin −2.1 V
TA = 25°C
Vin −1.5 V
Vin −1.0 V
Vin −0.5 V
0
35
25
15
5.0
1.0 2.0 3.0
10
04
.0
20
30
VOUT, OUTPUT VOLTAGE (V)
TA = 25°C
Vin = 4.0 V
Vin = 3.5 V
Vin = 3.0 V
Vin = 2.5 V
Vin = 2.0 V
Vin = 1.5 V
IOUT, OUTPUT SINK CURRENT (mA)
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Figure 21. NCP302/3 Series 0.9 V
CD Delay Pin Sink Current vs. Input Voltage Figure 22. NCP302/3 Series 2.7 V
CD Delay Pin Sink Current vs. Input Voltage
Figure 23. NCP302/3 Series 4.5 V
CD Delay Pin Sink Current vs. Input Voltage Figure 24. NCP302/3 Series 0.9 V
CD Delay Pin Sink Current vs. Voltage
Figure 25. NCP302/3 Series 2.7 V
CD Delay Pin Sink Current vs. Voltage Figure 26. NCP302/3 Series 4.5 V
CD Delay Pin Sink Current vs. Voltage
TA = 25°C
Vin, INPUT VOLTAGE (V)
1.2
0.8
0.4
0
0.2
0.6
1.0
1.4
00.2 0.4 0.6 0.8 1.0
TA = −40°C
TA = 85°C
I
CD
, C
D
DELAY PIN SINK CURRENT (mA)
VCD = 0.5 V
ICD, CD DELAY PIN SINK CURRENT (mA
)
TA = 25°C
Vin, INPUT VOLTAGE (V)
0
10
6.0
2.0
0.5 1.0 1.5 2.0 2.5 3
.0
4.0
0
8.0
TA = −40°C
TA = 125°C
VCD = 0.5 V
I
CD
, C
D
DELAY PIN SINK CURRENT (mA)
TA = 25°C
Vin, INPUT VOLTAGE (V)
01.0 2.0 3.0 4.0 5.0
12
8.0
0
4.0
16
20
TA = −40°C
TA = 125°C
VCD = 0.5 V
0
VCD, DELAY PIN VOLTAGE (V)
0.2 0.4 0.6 0.8 1
.0
1.5
0.5
0
1.0
TA = 25°C
ICD, CD DELAY PIN SINK CURRENT (mA)
Vin = 0.85 V
Vin = 0.7 V
16
12
8.0
4.0
000.5 1.0 1.5 2.0 2.5
VCD, DELAY PIN VOLTAGE (V)
TA = 25°CVin = 2.5 V
Vin = 2.0 V
Vin = 1.5 V
I
CD
, C
D
DELAY PIN SINK CURRENT (mA)
0 1.0 2.0 3.0
10
04
.0
40
20
30
VCD, DELAY PIN VOLTAGE (V)
TA = 25°C
Vin = 4.0 V
Vin = 3.5 V
Vin = 3.0 V
Vin = 2.5 V
ICD, CD DELAY PIN SINK CURRENT (mA)
14
12
1.6
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Figure 27. NCP302/3 Series 0.9 V
CD Delay Pin Threshold Voltage vs. Temperature Figure 28. NCP302/3 Series 2.7 V
CD Delay Pin Threshold Voltage vs. Temperature
Figure 29. NCP302/3 Series 4.5 V
CD Delay Pin Threshold Voltage vs. Temperature Figure 30. NCP302/3 Series 0.9 V
Output Time Delay vs. Capacitance
Figure 31. NCP302/3 Series 2.7 V
Output Time Delay vs. Capacitance Figure 32. NCP302/3 Series 4.5 V
Output Time Delay vs. Capacitance
−50
0.9
0.8
0.7
0.6
0.4
−25 025 50 75 100
0.5
0.3
TA, AMBIENT TEMPERATURE (°C)
VTCD, CD PIN THRESHOLD VOLTAGE (V
)
Vin = 0.99 V
−50
2.2
2.1
2.0
1.8
−25 025 50 75 12
5
1.9
1.7
TA, AMBIENT TEMPERATURE (°C)
VTCD, CD PIN THRESHOLD VOLTAGE (V
)
Vin = 2.97 V
−50
3.6
3.5
3.4
3.3
3.7
−25 025 50 75 125
3.2
TA, AMBIENT TEMPERATURE (°C)
VTCD, CD PIN THRESHOLD VOLTAGE (V)
Vin = 4.95 V
0.00001 0.001 0.01 0.1 1.0
10000
1000
100
10
0.1
1.0
CD, DELAY PIN CAPACITANCE ( mF)
TA = 25°C
tD2 (ms)
tD1 (ms)
, t D2, OUTPUT TIME DELAYtD1
100
0.0001
100
0.00001 0.001 0.01 0.1 1
.0
10000
1000
100
10
0.1
1.0
CD, DELAY PIN CAPACITANCE ( mF)
TA = 25°C
tD2 (ms)
tD1 (ms)
, t D2, OUTPUT TIME DELAYtD1
0.0001
0.00001 0.001 0.01 0.1 1
.0
10000
1000
100
10
0.1
1.0
CD, DELAY PIN CAPACITANCE ( mF)
TA = 25°C
tD2 (ms)
tD1 (ms)
, t D2, OUTPUT TIME DELAYtD1
0.0001
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Figure 33. NCP302/3 Series 0.9 V
Reset Output Time Delay vs. Temperature Figure 34. NCP302/3 Series 2.7 V
Reset Output Time Delay vs. Temperature
Figure 35. NCP302/3 Series 4.5 V
Reset Output Time Delay vs. Temperature Figure 36. NCP302/3 Series
Delay Resistance vs. Temperature
−50
TA, AMBIENT TEMPERATURE (°C)
250
200
160
80
−25 025 50 75 100
120
0
CD = 0.1 mF
t
D2
, OUTPUT TIME DELAY (ms)
120
80
40
0
−50 −25 025 50 75 12
5
TA, AMBIENT TEMPERATURE (°C)
20
60
100
160
CD = 0.1 mF
tD2, OUTPUT TIME DELAY (ms)
−50
TA, AMBIENT TEMPERATURE (°C)
250
200
150
50
−25 025 50 75 100
100
0
CD = 0.1 mF
t
D2
, OUTPUT TIME DELAY (ms)
1.6
1.2
0.8
0.4
0
−50 −25 025 50 75 12
5
TA, AMBIENT TEMPERATURE (°C)
RD, DELAY RESISTANCE (MW)
100
140
100
40
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OPERATING DESCRIPTION
The NCP302 and NCP303 series devices consist of a
precision voltage detector that drives a time delay generator.
Figures 37 and 38 show a timing diagram and a typical
application. Initially consider that input voltage Vin is at a
nominal level and it is greater than the voltage detector upper
threshold (VDET+). The voltage at Pin 5 and capacitor CD
will be at the same level as Vin, and the reset output (Pin 1)
will be in the high state for active low devices, or in the low
state for active high devices. If there is a power interruption
and Vin becomes significantly deficient, it will fall below th e
lower detector threshold (VDET−) and the external time
delay capacitor CD will be immediately discharged by an
internal N−Channel MOSFET that connects to Pin 5. This
sequence of events causes the Reset output to be in the low
state for active low devices, or in the high state for active
high devices. After completion of the power interruption,
Vin will again return to its nominal level and become greater
than the VDET+. The voltage detector will turn off the
N−Channel MOSFET and allow pullup resistor RD to char ge
external capacitor CD, thus creating a programmable delay
for releasing the reset signal. When the voltage at Pin 5
exceeds the inverter/buffer threshold, typically 0.675 Vin,
the reset output will revert back to its original state. The reset
output time delay versus capacitance is shown in Figures 30
through 32. The voltage detector and inverter/buffer have
built−in hysteresis to prevent erratic reset operation.
Although these device series are specifically designed for
use as reset controllers in portable microprocessor based
systems, they offer a cost−effective solution in numerous
applications where precise voltage monitoring and time
delay are required. Figures 38 through 46 show various
application examples.
Figure 37. Timing Waveforms
tD2
Vin
VDET+
VDET−
Input Voltage, Pin 2
Capacitor, Pin 5
Vin
0 V
Reset Output (Active Low), Pin 1
Vin
Reset Output (Active High), Pin 1 Vin
0 V
0.675 Vin
VDET−
VDET−
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APPLICATION CIRCUIT INFORMATION
Figure 38. Microprocessor Reset Circuit
2 Input
1
Reset Output
GN-
D
5
CD
NCP302
LSN27T1
Figure 39. Battery Charge Indicator
2 Input
1
Reset Output
GN-
DGND
VDD
Reset
VDD
5
CD
CD
NCP302
Series
3
3
Microprocessor
* Required for
NCP303
Vin < 2.7 ON
Vin > 2.835 ON
To Additional Circuitry
2 Input
1
Reset Output
GN-
D
5
CD
NCP303
LSN45T1
Figure 40. Missing Pulse Detector or Frequency Detector
3
Vsupply
To Additional Circuitry
CD
*
Reset Output
CD
Input
[0.675*Vin
Missing Pulse
tD2
470 k
0.001 mF
2.85 V
2.70 V
0 V
5.0 V
1.0 V
0 V
Vin
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Figure 41. Microprocessor Reset Circuit with Additional Hysteresis
2
1
NCP301
LSN27T1
3
VDD
GN-
D
Reset Output
Input
RH
RL
NCP301
LSN27T1
GN-
D
NCP303
LSN27T1
GN-
DGN-
D
Reset
VDD
Microprocessor
5
CD
Comparator hysteresis can be increased with the addition of
resistor RH. The hysteresis equations have been simplified and
do not account for the change of input current Iin as Vin crosses
the comparator threshold. The internal resistance, Rin is simply
calculated using Iin = 0.26 mA at 2.6 V.
Vin Decreasing:
Vth +ǒRH
Rin )1ǓǒVDET*Ǔ
Vin Increasing:
Vth +ǒRH
Rin øRL)1ǓǒVDET*)VHYSǓ
VHYS = Vin Increasing − V in Decreasing
Test Data
Vth Decreasing
(V) Vth Increasing
(V) VHYS
(V) RH
(W)RL
(kW)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
2.84
2.87
2.88
2.91
2.90
2.94
2.98
2.70
3.04
3.15
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
0.135
0.17
0.19
0.21
0.20
0.24
0.28
0.27
0.34
0.35
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
0
100
100
100
220
220
220
470
470
470
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
−
10
6.8
4.3
10
6.8
4.3
10
6.8
4.3
Figure 42. Simple Clock Oscillator
NCP301
LSN27T1
GN-
D
Reset Output
Input 82 k
NCP301
LSN27T1
GN-
D
NCP302
HSN27T1
GN-
D
C
5.0 V
100 k
C (mF) fOSC (kHz) IQ (mA)
0.01 2590 21.77
0.1 490 21.97
1.0 52 22.07
Test Data
5
CD
2
3
1
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Figure 43. Microcontroller Systems Load Sensing
NCP301
LSN27T1
50 k
NCP301
LSN27T1
NCP303
LSN09T1
V
supply
Load
Rsense Input
2
3GND
1
Reset Output Microcontroller
GND
VDD
If:
ILoad t VDET− /Rsense
ILoad w (VDET−+VHYS)/Rsense
Then:
Reset Output = 0 V
Reset Output = VDD
This circuit monitors the current at the load. As
current flows through the load, a voltage drop with
respect to ground appears across Rsense where
Vsense = Iload * Rsense. The following conditions apply:
5
CD
Figure 44. LED Bar Graph Voltage Monitor
NCP301
LSN27T1
2
NCP301
LSN27T1
NCP303
LSN45T1
3
1
Vsupply
NCP301
LSN27T1
2
NCP301
LSN27T1
NCP303
LSN27T1
3
1
NCP301
LSN27T1
2
NCP301
LSN27T1
NCP303
LSN18T1
3
1
Input
GND
Reset
Output
Input
GND
Reset
Output
Input
GND
Reset
Output
Vin = 1.0 V to 10 V
A simple voltage monitor can be constructed by connecting several voltage detectors as shown above. Each LED will
sequentially turn on when the respective voltage detector threshold (VDET− +VHYS) is exceeded. Note that detector
thresholds (VDET−) that range from 0.9 V to 4.9 V in 100 mV steps can be manufactured.
5
CD
5
CD
5
CD
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Figure 45. Undervoltage Detection with Independent Reset Signal Control
2
1
5
3
Reset Output
EN
Input
VDD
CD
CD
GND
To MCU or
Logic Circuitry
Logic 1
IN NCP302L
Series
VDD
VDD
0 V
0 V
0 V
0
1
VDET
VTCD
tD2 tD2
NCP302
Input Pin
Logic 1
Enable
Pin
Reset
Output
CD Pin
Note: Logic 1 is in tristate when EN = 0,
VTCD 0.675 * VDD
This circuit monitors VDD for undervoltage. If the VDD
input falls below the detector threshold (VDET−), then the
capacitor on the CD pin will be immediately discharged
resulting in the reset output changing to its active state
indicating that an undervoltage event has been detected. The
addition of a logic gate (Logic 1) provides for reset output
control which is independent of VDD. If the output of the
logic gate is tristated the undervoltage detector will behave
normally. If the tristate is de−asserted, the logic gate will pull
the C D pin low resulting in the Reset Output pin changing to
an active state. This independent control is useful in power
supply sequencing applications when the Reset Output is
tied to the enable input of an LDO or DC−DC converter.
NCP302, NCP303
http://onsemi.com
21
Figure 46. Multi−Rail Supply Undervoltage Monitor with Power Good
*
R1 is Optional CD Pin Pullup
3.3 V Power Supply 2
(I/O Subsystem)
VIN
VIN
0 V
0 V
0 V
VTCD
CD Pin
Note: VTCD 0.675 * VIN tD2
2
1
5
3
Reset Output
Input
CD
GND
NCP302L
Series
2
1
3
Reset Output
Input
GND
2
1
3
Reset Output
Input
GND
NCP301
LSN30T1
NCP301
LSN45T1
CD
5.0 V Power Supply 3
(Peripheral Subsystem)
Power Supply 1
(System Core)
R1 RP
*Required for
NCP303
To MCU or
Logic Circuitry
0 V
0 V
tD2 tD2 tD2
Power Supply 1
Power Supply 2
VP
Power Supply 3
NCP302L
RESET Output
This circuit monitors multiple power supply rails for
undervoltage conditions. If any of the three power supplies
are in an undervoltage condition, the NCP302 reset output
will be immediately set to an active low level. All three
power supplies must be above their minimum voltage levels
for the NCP302 reset output to generate a “Power Good”
level (Reset Output = Power Supply 1 or VP).
Optionally, R1 may be added to provide a smaller
effective CD pin pullup resistance, (RD’), where
RD’ = R1 || RD, with RD (internal CD pin pullup resistance)
approximately equal to 1.0 MW, and R1 > 5 kW. If R1 << RD,
then R1 also can decrease the reset output delay time (tD2)
variance over the operating temperature range.
The Power Good signal time delay (tD2) can be estimated
by: tD2 ≈ RD * CD, with RD in Ohms, and CD in Farads. If
R1 is installed, then RD’ is substituted for RD. RP is added
only if using the NCP303 to replace the NCP302. This
allows the Reset Output to be pulled up to VP, which can be
the Power Supply 1 or an independent power supply rail.
NCP302, NCP303
http://onsemi.com
22
ORDERING INFORMATION
Device Threshold
Voltage Output
Type Reset Marking Package Shipping†
NCP302LSN09T1G 0.9
CMOS
Active
Low
SBO TSOP−5
(Pb−Free)
3000 / Tape & Reel
(7 inch Reel)
NCP302LSN15T1G 1.5 SBI TSOP−5
(Pb−Free)
NCP302LSN18T1G 1.8 SBF TSOP−5
(Pb−Free)
NCP302LSN20T1G 2.0 SBD TSOP−5
(Pb−Free)
NCV302LSN20T1G* AHH
NCP302LSN27T1G 2.7 SAW TSOP−5
(Pb−Free)
NCP302LSN28T1G 2.8 ALA TSOP−5
(Pb−Free)
NCP302LSN30T1G 3.0 SAT TSOP−5
(Pb−Free)
NCV302LSN30T1G* ACJ
NCP302LSN33T1G 3.3 SAQ TSOP−5
(Pb−Free)
NCP302LSN38T1G 3.8 SAK TSOP−5
(Pb−Free)
NCP302LSN40T1G 4.0 SAI TSOP−5
(Pb−Free)
NCP302LSN43T1G 4.3 SAF TSOP−5
(Pb−Free)
NCP302LSN45T1G 4.5 SAL TSOP−5
(Pb−Free)
NCP302LSN47T1G 4.7 SAC TSOP−5
(Pb−Free)
NCP302HSN09T1G 0.9
Active
High
SDO TSOP−5
(Pb−Free)
NCP302HSN18T1G 1.8 SFH TSOP−5
(Pb−Free)
NCP302HSN27T1G 2.7 SDK TSOP−5
(Pb−Free)
NCP302HSN30T1G 3.0 SDI TSOP−5
(Pb−Free)
NCP302HSN40T1G 4.0 SJH TSOP−5
(Pb−Free)
NCP302HSN45T1G 4.5 SDG TSOP−5
(Pb−Free)
NOTE: The ordering information lists standard undervoltage thresholds with active low outputs. Additional active low threshold devices,
ranging from 0.9 V to 4.9 V in 100 mV increments and NCP302 active high output devices, ranging from 0.9 V to 4.9 V in 100 mV increments
can be manufactured. Contact your ON Semiconductor representative for availability. The electrical characteristics of these additional
devices are shown in Tables 1 and 2.
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and
PPAP Capable.
NCVxxx: Tlow = −40°C, Thigh = +125°C. Guaranteed by design.
NCP302, NCP303
http://onsemi.com
23
ORDERING INFORMATION
Device Shipping†
PackageMarkingReset
Output
Type
Threshold
Voltage
NCP303LSN09T1G 0.9
Open
Drain Active
Low
SDE TSOP−5
(Pb−Free)
3000 / Tape & Reel
(7 inch Reel)
NCV303LSN09T1G* AMU
NCP303LSN10T1G 1.0 SDD TSOP−5
(Pb−Free)
NCV303LSN10T1G* SSM
NCP303LSN11T1G 1.1 SDC TSOP−5
(Pb−Free)
NCV303LSN11T1G* ADC
NCV303LSN12T1G* 1.2 SDB TSOP−5
(Pb−Free)
NCP303LSN13T1G 1.3 SDA TSOP−5
(Pb−Free)
NCV303LSN13T1G* SRS
NCP303LSN14T1G 1.4 SCZ TSOP−5
(Pb−Free)
NCV303LSN14T1G* SRT
NCP303LSN15T1G 1.5 SCY TSOP−5
(Pb−Free)
NCV303LSN15T1G* SRU
NCP303LSN16T1G 1.6 SCX TSOP−5
(Pb−Free)
NCV303LSN16T1G* SRV
NCP303LSN17T1G 1.7 SCW TSOP−5
NCP303LSN18T1G 1.8 SCV TSOP−5
(Pb−Free)
NCP303LSN20T1G 2.0 SCT TSOP−5
(Pb−Free)
NCV303LSN20T1G* SRW
NOTE: The ordering information lists standard undervoltage thresholds with active low outputs. Additional active low threshold devices,
ranging from 0.9 V to 4.9 V in 100 mV increments and NCP302 active high output devices, ranging from 0.9 V to 4.9 V in 100 mV increments
can be manufactured. Contact your ON Semiconductor representative for availability. The electrical characteristics of these additional
devices are shown in Tables 1 and 2.
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and
PPAP Capable.
NCVxxx: Tlow = −40°C, Thigh = +125°C. Guaranteed by design.
NCP302, NCP303
http://onsemi.com
24
ORDERING INFORMATION
Device Shipping†
PackageMarkingReset
Output
Type
Threshold
Voltage
NCP303LSN22T1G 2.2
Open
Drain Active
Low
SCR TSOP−5
(Pb−Free)
3000 / Tape & Reel
(7 inch Reel)
NCV303LSN22T1G* ADD
NCP303LSN23T1G 2.3 SCQ TSOP−5
(Pb−Free)
NCV303LSN23T1G* SRX
NCP303LSN24T1G 2.4 SCP TSOP−5
(Pb−Free)
NCV303LSN24T1G* SRY
NCP303LSN25T1G 2.5 SCO TSOP−5
(Pb−Free)
NCV303LSN25T1G* AHA
NCP303LSN26T1G 2.6 SCN TSOP−5
(Pb−Free)
NCP303LSN27T1G 2.7 SCM TSOP−5
(Pb−Free)
NCV303LSN27T1G* CAP
NCP303LSN28T1G 2.8 SCL TSOP−5
(Pb−Free)
NCV303LSN28T1G* TAA
NCP303LSN29T1G 2.9 SCK TSOP−5
(Pb−Free)
NCV303LSN29T1G* SSK TSOP−5
(Pb−Free)
NCP303LSN30T1G 3.0 SCJ TSOP−5
(Pb−Free)
NCV303LSN30T1G* SSA TSOP−5
(Pb−Free)
NCP303LSN31T1G 3.1 SCI TSOP−5
(Pb−Free)
NCV303LSN31T1G* CAR TSOP−5
(Pb−Free)
NCP303LSN32T1G 3.2 SCH TSOP−5
(Pb−Free)
NOTE: The ordering information lists standard undervoltage thresholds with active low outputs. Additional active low threshold devices,
ranging from 0.9 V to 4.9 V in 100 mV increments and NCP302 active high output devices, ranging from 0.9 V to 4.9 V in 100 mV increments
can be manufactured. Contact your ON Semiconductor representative for availability. The electrical characteristics of these additional
devices are shown in Tables 1 and 2.
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and
PPAP Capable.
NCVxxx: Tlow = −40°C, Thigh = +125°C. Guaranteed by design.
NCP302, NCP303
http://onsemi.com
25
ORDERING INFORMATION
Device Shipping†
PackageMarkingReset
Output
Type
Threshold
Voltage
NCP303LSN33T1G 3.3
Open
Drain Active
Low
SCG TSOP−5
(Pb−Free)
3000 / Tape & Reel
(7 inch Reel)
NCP303LSN34T1G 3.4 SCF TSOP−5
(Pb−Free)
NCV303LSN34T1G* CAT
NCP303LSN36T1G 3.6 SCD TSOP−5
(Pb−Free)
NCV303LSN36T1G* SSC
NCP303LSN38T1G 3.8 SCA TSOP−5
(Pb−Free)
NCP303LSN40T1G 4.0 SBY TSOP−5
(Pb−Free)
NCV303LSN40T1G* SSD
NCP303LSN42T1G 4.2 SBW TSOP−5
(Pb−Free)
NCV303LSN42T1G* SSE
NCV303LSN43T1G* 4.3 SBV TSOP−5
(Pb−Free)
NCP303LSN44T1G 4.4 SBU TSOP−5
(Pb−Free)
NCV303LSN44T1* SSF TSOP−5
NCV303LSN44T1G* TSOP−5
(Pb−Free)
NCP303LSN45T1G 4.5 SBT TSOP−5
(Pb−Free)
NCV303LSN45T1G* SSG
NCP303LSN46T1G 4.6 SBS TSOP−5
(Pb−Free)
NCV303LSN46T1* SSH TSOP−5
NCV303LSN46T1G* TSOP−5
(Pb−Free)
NCP303LSN47T1G 4.7 SBR TSOP−5
(Pb−Free)
NCV303LSN47T1* SSJ TSOP−5
NCV303LSN47T1G* TSOP−5
(Pb−Free)
NCP303LSN49T1G 4.9 SBP TSOP−5
(Pb−Free)
NCV303LSN49T1* SSI TSOP−5
NCV303LSN49T1G* TSOP−5
(Pb−Free)
NOTE: The ordering information lists standard undervoltage thresholds with active low outputs. Additional active low threshold devices,
ranging from 0.9 V to 4.9 V in 100 mV increments and NCP302 active high output devices, ranging from 0.9 V to 4.9 V in 100 mV increments
can be manufactured. Contact your ON Semiconductor representative for availability. The electrical characteristics of these additional
devices are shown in Tables 1 and 2.
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and
PPAP Capable.
NCVxxx: Tlow = −40°C, Thigh = +125°C. Guaranteed by design.
NCP302, NCP303
http://onsemi.com
26
PACKAGE DIMENSIONS
TSOP−5
(SOT−23−5/SC59−5)
CASE 483−02
ISSUE K
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH
THICKNESS. MINIMUM LEAD THICKNESS IS THE
MINIMUM THICKNESS OF BASE MATERIAL.
4. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH, PROTRUSIONS, OR GATE BURRS. MOLD
FLASH, PROTRUSIONS, OR GATE BURRS SHALL NOT
EXCEED 0.15 PER SIDE. DIMENSION A.
5. OPTIONAL CONSTRUCTION: AN ADDITIONAL
TRIMMED LEAD IS ALLOWED IN THIS LOCATION.
TRIMMED LEAD NOT TO EXTEND MORE THAN 0.2
FROM BODY.
DIM MIN MAX
MILLIMETERS
A3.00 BSC
B1.50 BSC
C0.90 1.10
D0.25 0.50
G0.95 BSC
H0.01 0.10
J0.10 0.26
K0.20 0.60
M0 10
S2.50 3.00
123
54 S
AG
B
D
H
CJ
__
0.7
0.028
1.0
0.039
ǒmm
inchesǓ
SCALE 10:1
0.95
0.037
2.4
0.094
1.9
0.074
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
0.20
5X
CAB
T0.10
2X
2X T0.20
NOTE 5
CSEATING
PLANE
0.05
K
M
DETAIL Z
DETAIL Z
TOP VIEW
SIDE VIEW
A
B
END VIEW
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reserves the r ight t o m ake c hanges wit hout f urt her n ot ice t o a ny p roduct s h erein. SCILLC makes n o w arranty, r epresentation o r g uarant ee r egarding t he s uitabilit y o f i ts p roduct s f o r a ny
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without
limitation s pecial, c onsequential o r i ncidental d amages. “Typical” p arameters w hich m ay be provided i n S CILLC d ata s heets and/or specifications c an a nd d o v ary i n d iff erent applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under i ts p at ent rights nor the rights of o t hers. S CI LLC p r oducts a re not designed, intended, or a ut horized f or use as components in systems intended for
surgical implant i nto t he b ody, or o ther a pplications int ended t o s upport o r s ustain l ife, o r f or any other a pplication in which the f ailure o f t he S CILLC p roduct c ould c reat e a s ituat ion w here
personal injury or death may occur. Should Buyer purchase or u se S CILLC p r oduct s f or any such unintended or unaut horized a ppli cation, B u yer s hall i ndemnif y a nd hold SCILLC and
its o f ficers, e mployees, s ubsidiaries, a ff iliates, and distributor s h arm less a gainst a ll c laims, c osts, d amages, a nd e xpenses, a nd r easonable a ttorney f ees a rising o ut o f, d irectly o r i ndirectly,
any claim of personal injury or death associated with such unintended or unauthorized use, even if su ch c laim a lleges that SCILLC was negligent regarding the d esign or manufacture
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P
UBLICATION ORDERING INFORMATION
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
NCP302/D
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: orderlit@onsemi.com
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Order Literature: http://www.onsemi.com/orderlit
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