SC1408MSTRT

更新时间： 2024-10-03 12:59:19

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
12页	159K
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中文翻译

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数据手册

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SC1408MSTRT 数据手册

LOW VOLTAGE, BOOST DC-DC

CONTROLLER

SC1408

August 22, 2000

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

DESCRIPTION

FEATURES

The SC1408 is a low voltage boost controller that oper-

ates from a 1.8V to 16.5V input range. A shutdown pin

allows the user to turn the controller off reducing sup-

ply current to less than 2µA typical. Output voltage can

be preset to 5V or is adjustable from 3V to 16.5V with

a resistor divider. The controller changes frequency in

low load conditions to improve efficiency.

•= ^{1.8V to 16.5V input range}

•= Up to 10W output power

•= Preset 5V or adjustable output

•= Up to 300kHz switching frequency

•= 10µA max shutdown current

•= Industrial temperature range

•= SO-8 or MSOP-8 package

The SC1408 was designed for two cell Alkaline or sin-

gle cell Lithium Ion battery applications. With the

proper external components it can be used as a boost

converter or a buck/boost converter.

APPLICATIONS

•= ^{PDA Power supplies}

•= Battery powered applications

•= Positive LCD Bias generator

•= Portable communications (cellular phones)

•= Peripheral card supplies

A current sense is implemented with an external resis-

tor that is not in the load current path.

The SC1408 operates in “bootstrapped” mode. When

the input voltage to the device is less than 2.5V during

startup, a low voltage 50% fixed duty cycle oscillator is

switched in to initiate boost action.

•= Industrial power supplies

ORDERING INFORMATION

Part Number⁽¹⁾

SC1408IS.TR

SC1408IMS.TR

Package

SO-8

Temp. Range (T_A)

-40° to +85°C

MSOP-8

Note:

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

contains 2500 devices.

TYPICAL APPLICATION - BOOST CONFIGURATION

Vin (1.8V to 16.5V)

Vout (3V to 16.5V)

BST

GATE

SHDN ISENSE

REF

AGND

GND

SC1408IS

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5 6 7...12

中文翻译

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