SC1543IMSTR datasheet(1/5 Pages) SEMTECH

tên linh kiện	SC1543IMSTR

Giải thích chi tiết về linh kiện	400mA/200mA Dual 3.3V Smart Power Switch

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nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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652 MITCHELL ROAD NEWBURY PARK CA 91320

400mA/200mA Dual 3.3V Smart

Power Switch

SC1543

PRELIMINARY - October 9, 2000

1

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

The SC1543 provides a glitch free 3.3V output when

one of two 3.3V input sources is present. It does not

require external logic to sequence from one input

source to the other.

Whenever VIN1 exceeds a

predetermined threshold value the internal MOSFET

connects it’s source voltage to the output. If the input at

VIN1 is below the threshold another internal MOSFET

connects VIN2 to the output. If both inputs are at 3.3V

then VIN1 will be connected to the output.

The SC1543 is designed to provide 400mA from the

main input (VIN1) and 200mA from the secondary input

(VIN2). A very low quiescent current of 10µA in

shutdown mode reduces power dissipation.

The internal logic and control circuit detects the voltage

levels of VIN1 and VIN2, and compares them to an

input reference voltage of 2.9V. An internally controlled

period of switch overlap ensures that the transition

between supplies is as glitch-free as possible.

The SC1543 is available in an MSOP-8 surface mount

package.

FEATURES

•= Glitch free transitions between inputs

•= Internal logic selects appropriate input

•= 400mA load current capability from main input

•= Low power shutdown mode

•= Industrial temperature range

APPLICATIONS

•= Mini PCI cards

•= Peripheral cards

•= Instantly available personal computers (IAPCs)

ORDERING INFORMATION

Part Number

(1)

Package

SC1543IMSTR

MSOP-8

Note:

(1) Only available in tape and reel packaging. A reel

contains 2500 devices.

APPLICATION CIRCUIT

3.3V IN

3.3VAUX IN

3.3V OUT

SHUTDOWN

U1

SC1543

1

2

3

4

5

6

7

8

VIN1

VIN2

GND

VOUT

SHDN

COUT

CIN2

CIN1

1uF

10uF

Số phần tương tự - SC1543IMSTR

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
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	SC1540ACS-2.5	64Kb / 4P	300mA AND 500mA LOW DROPOUT VOLTAGE REGULATORS WITH ENABLE
	SC1540ACS-3.3	64Kb / 4P	300mA AND 500mA LOW DROPOUT VOLTAGE REGULATORS WITH ENABLE

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