SC4431CSK-2TR

更新时间： 2025-08-01 22:28:51

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器输出元件
页数	文件大小	规格书
5页	54K
描述
SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT

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中文翻译

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数据手册

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SC4431CSK-2TR 数据手册

SHUNT REGULATOR WITH OPEN

COLLECTOR OR OUTPUT

SC4431

PRELIMINARY - September 11, 2000

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

DESCRIPTION

FEATURES

The SC4431 is a four terminal device for regulating an

isolated power supply with very low output voltage.

•= Trimmed bandgap design - initial accuracies to

+ 0.5%

•= 40mA drive capability

It is intended to be used as a replacement for three ter-

minal shunt regulators such as SC431L where the out-

put voltage is too low for them to function in conjunc-

tion with an opto-isolator. It achieves this by having

seperate supply and output pins, allowing the output to

sink current at voltages as low as 0.2V, while the sup-

ply pin still has sufficient voltage for the device to func-

tion. In this way, allowing for a 1.6V drop through an

opto-isolator diode, regulation down to 1.8V out can be

achieved.

•= Wide supply voltage range - 1.5V to 15V

•= Low supply current - typically 110µA

•= Full industrial temperature range

APPLICATIONS

•= ^{Opto driver for very low output voltage isolated}

power supplies

The SC4431 shunt regulator is available with three ini-

tial reference voltage accuracies (0.5%, 1.0% and

2.0%) in the space saving 5-lead SOT-23 package.

The three voltage tolerances allow the designer the

opportunity to select the proper cost/tolerance for their

application.

ORDERING INFORMATION

Part Number⁽¹⁾⁽²⁾

Package

SC4431CSK-X.TR

SOT-23-5

Notes:

(1) Where “-X” denotes initial reference voltage toler-

ance. Available options are ±0.5% (-.5), ±1% (-1) and

±2% (-2).

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

contains 3000 devices.

TYPICAL APPLICATION CIRCUIT

2V OUT

Primary Side

Controller

Secondary Side

Rectification

VIN

and Filtering

5.1k

33nF

6.34k

SC4431

VCC

OUT

REF

4N25

22nF

10k

GND

2V Output Isolated Power Supply

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5

中文翻译

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