AIC1520
Single High-Side Power Switch
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
DS-1520-00 July 7, 00 TEL: 886-3-5772500 FAX: 886-3-5772510 1
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FEATURES
·120mW (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80mA Typical On-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
l Output can be Forced Higher than Input (Off-State).
l Slow Turn ON and Fast Turn OFF.
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APPLICATIONS
l Motherboard USB Management.
l USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
l Power Distribution Switch.
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DESCRIPTION
The AIC1520 is an integrated high-side power
switch for self-powered and bus-powered
Universal Serial Bus (USB) applications. The
high-side switch is a MOSFET with 120mW RDS(ON),
which meets USB voltage drop requirements for
maximum transmission wire length.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
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TYPICAL APPLICATION CIRCUIT
33mF
5.0V
VCC OUT
IN
GND
*
33mF
D+
D-
GND
VBUS
0.01mF
*33mF, 16V Tantalum, or
100mF, 10V Electrolytic
Bold line indicate high-current traces
0.1mF
Ferrite Bead
+
DATA
A
AI
IC
C1
15
52
20
0
+
USB High-Side Power Switch
AIC1520
2
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ORDERING INFORMATION
ORDER NUMBER
AIC1520CX
(SOT-89)
PIN CONFIGURATION
FRONT VIEW
1: IN
2: GND
3: OUT
A
IC1520CX
1
2
3
123
PACKAGING TYPE
X: SOT-89
Z: TO-92
AIC1520CZ
(TO-92)
TOP VIEW
1: IN
2: GND
3: OUT
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VIN).......................................................………….......……........... 7.0V
Operating Temperature Range ......………..............…………….…............... -40°C ~ 85°C
Storage Temperature Range ....................................……….................. -65°C ~ 150°C
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ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25°C, unless otherwise
specified.)
PARAMETERS CONDITIONS MIN. TYP. MAX. UNIT
Supply Current Switch On, OUT=Open 80 100 mA
Output MOSFET Resistance IOUT = 500mA 120 180 mW
Output Turn-On Rise Time RL = 10W 500 mS
Output Turn-Off Fall Time RL = 10W 0.2 10 mS
Output Leakage Current 2 mA
Current Limit Threshold 0.6 1.0 1.25 A
Thermal Limit 110 °C
UVLO Threshold VIN Increasing
VIN Decreasing
2.8
2.6
V
AIC1520
3
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BLOCK DIAGRAM
GATE
NMOS
RS
Limit
Current
UV LO
Gate Control
Charge
Pu mp
Thermal
Protection
OSC.
GND
OUT
IN
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TYPICAL PERFORMANCE CHARACTERISTICS
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
60
65
70
75
80
85
90
On-State Supply Current vs. Supply Voltage
Supply Current (mA)
Supply Voltage (V)
-40 -20 0 20 40 60 80 100
65
70
75
80
85
On-State Supply Current vs. Temperature
Supply Current (mA)
Temperature (°C)
AIC1520
4
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TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
100
105
110
115
120
125
130
Output On Resistance vs. Supply Voltage
Switch On Ristance (mW)
Supply Voltage (V)
Switch On Resistance (mW)
Temperature (°C)
-40 -20 0 20 40 60 80 100
80
90
100
110
120
130
140
150
Output On Resistance vs. Temperature
UVLO Threshold Voltage (V)
Temperature (°C)
-40 -20 0 20 40 60 80 100
2.4
2.5
2.6
2.7
2.8
2.9
3.0
Falling
Rising
UVLO Threshold Voltage vs. Temperature
Temperature (°C)
-40 -20 0 20 40 60 80 100
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
Current Limit Threshold vs. Temperature
Current Limit (A)
Output Rise Time (m S)
Temperature (°C)
Output Rise Time vs. temperature
-40 -20 0 20 40 60 80 100
350
400
450
500
550
VIN
IOUT
VOUT
200mA/DIV
Turn On Rising Time (10W loading)
AIC1520
5
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TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
500mA/div
VOUT
IOUT
Turn On Characteristic (35W, 100mF Loading) Turn On Characteristic (35W Loading)
VIN
100mF
no cap
IOUT, 200mA/div
220mF
IOUT 500mA/DIV
VOUT
1A
1.2A
Current Limit Threshold Short Circuit Testing
VOUT
500mA/DIV
Thermal Oscillation
IOUT
IOUT 500mA/DIV
VOUT
Thermal Limiting Transient Response
Thermal limit (2W Loading)
Short Circuit Response Time
IOUT 1A/DIV
Short
VOUT
AIC1520
6
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PIN DESCRIPTION
PIN 1: IN - Power supply input.
PIN 2: GND - Chip power ground.
PIN 3: OUT - MOSFET switch output.
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APPLICATION INFORMATIONS
l Current Limit
The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage due to undesirable short circuit conditions
or excess inrush current often encountered during
hot plug-in. AIC1520 allows a minimum current of
0.5A through the MOSFET switches.
l Thermal Protection
When the chip temperature exceeds 110°C, the
thermal protection function works.
l Supply Filtering
A 0.1mF to 1mF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance)
to damage internal control circuitry.
l Transient Droop Requirements
USB support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads
are recommended in series with all power and
ground connector pins. Ferrite beads reduce EMI
and limit the inrush current during hot-attachment
by filtering high-frequency signals.
l Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event.
With a 33uF, 16V tantalum or 100uF, 10V
electrolytic capacitor mounted close to
downstream connector should provide transient
drop protection.
l Printed Circuit Layout
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
AIC1520
7
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PHYSICAL DIMENSIONS
l SOT-89 (unit: mm)
SYMBOL MIN MAX
A1.40 1.60
B0.36 0.48
C0.35 0.44
D4.40 4.60
D1 1.62 1.83
E2.29 2.60
e1.50 (TYP.)
e1 3.00 (TYP.)
H3.94 4.25
B
e
H
e1
D
D1
A
C
L
E
L0.89 1.20
l SOT-89 MARKING
Part No. Marking
AIC1520-CX BG01
l TO-92 (unit: mm)
SYMBOL MIN MAX
A4.32 5.33
C0.38 (TYP.)
D4.40 5.20
E3.17 4.20
e1 1.27 (TYP.)
AL
e1
D
C
E
L12.7 -
