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US201_12 Datasheet, PDF (1/7 Pages) Unisonic Technologies – HIGH-SIDE POWER SWITCHES WITH FLAG | |||
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UNISONIC TECHNOLOGIES CO., LTD
US201/A/B/C
HIGH-SIDE POWER SWITCHES
WITH FLAG
 DESCRIPTION
The UTC US201/A/B/C series are 80m⦠high-side power
switches. Thereâs internal single low voltage N-Channel MOSFET
which makes it an ideal for all USB applications. This MOSFET
should be driven by a charge pump circuitry inside. Its switch on
resistance is as low as 80m⦠which we know specially meets the
drop voltage for USB applications.
The flag pin can output an open-drain fault flag to next controller.
Thereâre lots internal special ways for protecting the chipâs
operation.
When in hot-plug events, thereâs large current which can create
the upstream voltage droop to match the USBâs voltage droop
requirements and soft-start for isolating the power source.
As soon as the die temperature is higher than 130â, the internal
shutdown circuit will work.
Only when thereâs a normal input voltage in the VIN pin, the
UVLO (under-voltage lockout, 1.3V/2.5V typ.) can make sure the
chip is till in the off state.
Because of the requirement of USB power the fault current
should be ensured less than 0.6A/1.1A (UTC US201/A, single port)
and 1.3A /1.5A (UTC US201B/C, dual ports).
 FEATURES
* 80mâ¦(Typ) N-Channel MOSFET
* Supply Current:
â Switch On : 25μA(Typ)
â Switch Off : 1μA (Typ)
* Load Current 500mA for US201 and 1.0A for US201A/B/C
* Input Voltage from 2V ~ 5.5V
* In Off-State: Output Voltage can be Higher than Input
 ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US201XXL-AF5-R
US201XXG-AF5-R
Package
SOT-25
CMOS IC
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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QW-R502-302.H
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