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PDF ( 数据手册 , 数据表 ) US211B

零件编号 US211B
描述 HIGH-SIDE POWER SWITCHES
制造商 Unisonic Technologies
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US211B 数据手册, 描述, 功能
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
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QW-R502-A67.a
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US211B pdf, 数据表
US211/A/B/C
Preliminary
TYPICAL APPLICATION CIRCUIT
CMOS IC
Supply Voltage 5V
1µF
Chip Enable
Pull-Up Resistor (10K ~ 100K)
RFG
VIN FLG
Flag Transient Filtering
10K
0.1µF
USB
Controller
Over -
Current
UTC
US211/A/B/C
CTL
GND
VOUT
10µF
150µF
VBUS
D+
D-
GND
Ferrite Beades Data
Note. A low-ESR 150μF aluminum electrolytic or tantalum between VOUT and GND is strongly recommended to meet
the 330mV maximum droop requirement in the hub VBUS.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 8
QW-R502-A67.a
Free Datasheet http://www.Datasheet4U.com














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