US201A-AF5-R [UTC]

Power Supply Support Circuit, PDSO5, SOT-25, 5 PIN;


型号：	US201A-AF5-R
厂家：	Unisonic Technologies
描述：	Power Supply Support Circuit, PDSO5, SOT-25, 5 PIN 光电二极管
文件：	总6页 (文件大小：256K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

US201/US201A

Preliminary

CMOS IC

80mΩ, 500mA/1.1A HIGH-SIDE

POWER SWITCHES WITH FLAG

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 80mꢀ 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_INpin, 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

* 80mꢀ(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

Ordering Number

US201G-AF5-R

US201AG-AF5-R

Package

SOT-25

Packing

Tape Reel

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US201/US201A

Preliminary

CMOS IC

MARKING

PIN CONFIGURATION

PIN DESCRIPTION

PIN NO

PIN NAME

CTL

DESCRIPTION

High active

Ground

GND

FLG

Open-drain fault flag output

Power input voltage

Output voltage

V_IN

V_OUT

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US201/US201A

Preliminary

CMOS IC

BLOCK DIAGRAM

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US201/US201A

Preliminary

CMOS IC

ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

6.5

UNIT

Supply Voltage

V_CC

+2~ +5.5 (Note 3)

-0.3~ +6.5

0~ +5.5 (Note 3)

6.5

CTL

FLG

V_CTL

Input/Output Pins

FLG

Power Dissipation (Ta=25°С)

Junction Temperature

P_D

0.25

℃

150

T_J

-20~ +100 (Note 3)

-65~ +150

Storage Temperature

T_STG

Note:1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

Stresses listed as the "Absolute Maximum Ratings" will cause permanent damage to the device.

The device is not guaranteed to function when it’s beyond its operating conditions.

THERMAL DATA

PARAMETER

SYMBOL

RATINGS

250

UNIT

Junction to Ambient

θ_JA

℃/W

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

V_IL

TEST CONDITIONS

MIN TYP MAX UNIT

Logic-Low Voltage

Logic-High Voltage

V_IN=2V~5.5V, Switch OFF

V_IN=2V~5.5V, Switch ON

V_INincreasing

0.8

CTL Threshold

V_IH

2.0

1.3

Under-Voltage Lockout

V_UVLO

∆V_UVLO

I_SW(ON)

I_SW(OFF)

I_I(CTL)

1.7

0.1

Under-Voltage Hysteresis

V_INdecreasing

Switch on, V_OUT=OPEN

Switch off, V_OUT=OPEN

V_CTL=0V~5.5V

µA

Supply Current

0.1

0.01

0.5

0.8

1.5

0.8

1.0

CTL Input Current

Output Leakage Current

I_O(LEAK)

V_CTL=0V, R_LOAD=0ꢀ

1.1

2.0

US201

0.5

1.1

Current Limit

I_LIMIT

R_LOAD=1ꢀ

US201A

US201

V_OUT=0V, measured prior

to thermal shutdown

I_{SC FB}

(

)

Short Circuit Fold-Back Current

Switch ON Resistance

US201A

US201

I_OUT= 500mA

I_OUT=1.1A

100 mꢀ

R_DS(ON)

US201A

FLG(OFF)

FLG

VFLG =5V

FLAG OFF Current

0.01

µA

FLAG Output Resistance

_SINK=1mA

400

ꢀ

FLAG Delay Time

t_D

t_{ON RISE}

From fault condition to FLG assertion

10% ~ 90% of V_OUTrising

(

)

Output Turn-ON Rise Time

Thermal Shutdown Protection

Thermal Shutdown Hysteresis

400

130

µs

℃

T_SD

∆T_SD

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US201/US201A

Preliminary

CMOS IC

TEST CIRCUITS

R_FG

V_IN

FLG

V_FLG

UTC

US201/A

C_I

V_OUT

Chip

Enable

V_OUT

CTL

GND

I_OUT

I_L

C_O

R_L

Turn-On & Off Response, Flag Response

R_FG

V_IN

FLG

V_FLG

UTC

US201/A

C_I

V_OUT

V_IN

V_OUT

CTL

GND

V_CTL

I_L

C_O

R_L

UVLO at Rising & Falling

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US201/US201A

Preliminary

CMOS IC

TYPICAL APPLICATION CIRCUIT

Pull-Up Resistor (10K ~ 100K)

R_FG

USB

Flag Transient Filtering

10K

Controller

Supply Voltage 5V

Over -

Current

V_IN

FLG

0.1µF

UTC

US201/A

1µF

V_BUS

D+

D-

V_OUT

CTL

Chip Enable

GND

10µF

150µF

GND

Data

Ferrite Beades

Note. A low-ESR 150μF aluminum electrolytic or tantalum between V_OUTand GND is strongly recommended to meet

the 330mV maximum droop requirement in the hub V_BUS

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.

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