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US211B Datasheet

HIGH-SIDE POWER SWITCHES

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UNISONIC TECHNOLOGIES CO., LTD
US211/A/B/C
Preliminary
HIGH-SIDE POWER SWITCHES
WITH FLAG
DESCRIPTION
The UTC US211/A/B/C series are 80mhigh-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 80mwhich 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 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 US211/A, single port)
and 1.3A /1.5A (UTC US211B/C, dual ports).
FEATURES
* 80m(Typ) N-Channel MOSFET
* Supply Current:
Switch On : 25μA(Typ)
Switch Off : 1μA (Typ)
* Load Current 500mA for US211 and 1.0A for US211A/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
US211XXL-AF5-R
US211XXG-AF5-R
Package
SOT-25
CMOS IC
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
1 of 8
QW-R502-A67.a
Free Datasheet http://www.Datasheet4U.com




UTC

US211B Datasheet Preview

US211B Datasheet

HIGH-SIDE POWER SWITCHES

No Preview Available !

US211/A/B/C
MARKING
5
4
Current Code:
1: 0.6A, A: 1.1A,
B: 1.3A, C: 1.5A
U1
12 3
Preliminary
G: Halogen Free
L : Lead Free
Logic Level Enable Pin
PIN CONFIGURATION
VOUT
5
VIN
4
1 23
CTL GND FLG
PIN DESCRIPTION
PIN NO
1
2
PIN NAME
DESCRIPTION
CTL Enable Input pin, H: High active, L: Low active
GND Ground
3 FLG Open-drain fault flag output
4 VIN Power input voltage
5
VOUT
Output voltage
BLOCK DIAGRAM
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 8
QW-R502-A67.a
Free Datasheet http://www.Datasheet4U.com


Part Number US211B
Description HIGH-SIDE POWER SWITCHES
Maker UTC
Total Page 8 Pages
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