US201 Datasheet, PDF (1/6 Pages) Unisonic Technologies – POWER SWITCHES WITH FLAG

UNISONIC TECHNOLOGIES CO., LTD
US201/US201A
Preliminary
80mΩ, 500mA/1.1A HIGH-SIDE
POWER SWITCHES WITH FLAG
CMOS IC
„ DESCRIPTION
The UTC US201/A series are 80mΩ, 500mA for US201 (1.1A for
US201A) high-side power switches. There’s 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 80mΩ which we
know specially meets the drop voltage for USB applications.
The flag pin can output an open-drain fault flag to next controller.
There’re lots internal special ways for protecting the chip’s
operation.
When in hot-plug events, there’s large current which can create
the upstream voltage droop to match the USB’s voltage droop
requirements and soft-start for isolating the power source.
As soon as the die temperature is higher than 130℃, the internal
shutdown circuit will work.
Only when there’s a normal input voltage in the V_IN pin, the UVLO
(under-voltage lockout, 1.7V 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 800mA (UTC US201, single port) and
1.5A (UTC US201A, dual ports).
„ FEATURES
Lead-free: US201L/US201AL
Halogen-free:US201G/US201AG
* 80mΩ(typ) N-Channel MOSFET
* Supply current:
– Switch on :25μA(typ)
– Switch off :1μA (typ)
* Load current 500mA for US201 and 1.1A for US201A
* Input voltage from 2V to 5.5V
* In off-state: Output voltage can be higher than input
„ ORDERING INFORMATION
Normal
US201-AF5-R
US201A-AF5-R
Ordering Number
Lead Free
US201L-AF5-R
US201AL-AF5-R
Halogen Free
US201G-AF5-R
US201AG-AF5-R
Package
SOT-25
SOT-25
Packing
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2009 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-302.b