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US202A Datasheet Preview

US202A Datasheet

POWER DISTRIBUTION SWITCHES

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UNISONIC TECHNOLOGIES CO., LTD
US202/A
100mPOWER DISTRIBUTION
SWITCHES
DESCRIPTION
The US202/A is a power distribution switch. It is particularly
suitable for self-powered and bus-powered USB (Universal Series
bus) applications. It has 28μA low quiescent supply current that
meets the requirements of battery-powered portable equipments.
A built-in charge pump is used to drive the N-channel N-MOSFET
that is free of parasitic body diode to eliminate any reversed current
flow across the switch when it is powered off.
The US202/A incorporates some protection circuits such as
current limit and short protection circuits, soft start circuit, thermal
shutdown and UVLO (Under-voltage Lockout) protection circuits.
The thermal shutdown circuits protect this device from damage when
over current occurs, and the soft start circuits are used to prevent
inrush current when plug-in event occurs.
The US202/A can be used in such applications such as
battery-powered equipments, motherboard USB power switches,
USB device power switches, hot-plug power supplies,
battery-charger circuits and so on.
FEATURES
* Input Voltage Varies From 2.7V to 5.5V
* Guaranteed Continuous Current: 1.0A/2.0A
* High-Side NMOSFET: 85m(TYP)
* Soft Start
* Current Limit:1.5A/2.5A
* Thermal Protection
* Low Supply Current: 28μA
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US202XL-AF5-R
US202XG-AF5-R
US202AXL-AF5-R
US202AXG-AF5-R
Package
SOT-25
SOT-25
CMOS IC
Packing
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2018 Unisonic Technologies Co., Ltd
1 of 5
QW-R502-445.F




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US202A Datasheet Preview

US202A Datasheet

POWER DISTRIBUTION SWITCHES

No Preview Available !

US202/A
MARKING
US202
PIN CONFIGURATION
CMOS IC
Current Code
Blank: 1.5A
A: 2.5A
US202A
54
US2
12 3
Logic Level Enable Pin
PIN DESCRIPTION
PIN NO.
1, 5
2
3
4
PIN NAME
VOUT
GND
VIN
EN
DESCRIPTION
Output Voltage
Ground
Power Input
Chip Enable (Active High)
BLOCK DIAGRAM
Bias
Oscillator
Current
Limiting
Charge
Pump
Control
Thermal
Detection
EN
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Current sense
VIN
NMOSFET
VOUT
VOUT
GND
2 of 5
QW-R502-445.F


Part Number US202A
Description POWER DISTRIBUTION SWITCHES
Maker UTC
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