Datasheet > SC1403_04

SC1403_04

更新时间： 2024-01-30 08:20:39

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
31页	560K
描述
Mobile Multi-Output PWM Controller with Lossless Current Sense

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SC1403_04 数据手册

SC1403

Mobile Multi-Output PWM Controller

with Lossless Current Sense

POWER MANAGEMENT

Description

Features

The SC1403 is a multiple-output power supply controller 3.3V and 5V dual synchronous outputs, resistor

designed to power battery operated systems. The

SC1403 provides synchronous buck converter control

for two (3.3V and 5V) power supplies. An efficiency of

95% can be achieved for the two supplies. The SC1403

uses Semtech’s proprietary Virtual Current Sense™ tech-

nology along with external error amplifier compensation

to achieve enhanced stability and DC accuracy over a

wide range of output filter components while maintain-

ing fixed frequency operation. Lossless current sensing

can be used to eliminate current sense resistors and

reduce cost. The SC1403 also provides a 5V linear regu-

lator for system housekeeping. The 5V linear regulator

is derived from the battery; for improved efficiency, the

output is switched to the 5V output when available.

programmable to 2.5V

Fixed frequency or PSAVE operation for maximum

efficiency over wide load range

5V / 50mA linear regulator

Virtual Current Sense™ for enhanced stability

Lossless current limiting

Out of phase switching reduces input capacitance

External compensation supports wide range of

output filter components

Programmable power-up sequence

Power Good output

Output overvoltage and overcurrent protection with

output undervoltage shutdown

6µA typical shutdown current

Control functions include power-up sequencing, soft start,

power-good signaling, and frequency synchronization. Line

and load regulation is to +/-1%. The internal oscillator

can be set to 200kHz, 300kHz, or synchronized to an

external clock. The mosfet drivers provide >1A peak

drive current for fast mosfet switching.

6mW typical quiescent power

Applications

Notebook and subnotebook computers

Tablet PCs

The SC1403 includes a PSAVE# input to select pulse skip-

ping mode for high efficiency at light load, or fixed fre-

quency mode for low noise operation.

Embedded applications

Typical Application Circuit

Revision 5, April 2004

United States Patent No. 6,377,032

www.semtech.com

12 3 4 5 6 7...31

中文翻译

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与SC1403_04相关器件

型号	品牌	获取价格	描述	数据表
SC1403ITSTR	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Virtual Current SenseTM
SC1403ITSTRT	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Lossless Current Sense
SC1404	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Virtual Current Sense
SC1404_05	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Virtual Current SenseTM
SC1404ISSTR	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Virtual Current Sense
SC1404ISSTRT	SEMTECH	获取价格	暂无描述
SC1404ITSTR	SEMTECH	获取价格	Mobile Multi-Output PWM Controller with Virtual Current Sense
SC1404ITSTRT	SEMTECH	获取价格	Dual Switching Controller, Current-mode, 380kHz Switching Freq-Max, PDSO28, ROHS COMPLIANT
SC1405	SEMTECH	获取价格	HIGH SPEED SYNCHRONOUS POWER MOSFET SMART DRIVER
SC1405B	SEMTECH	获取价格	High Speed Synchronous Power MOSFET Smart Driver

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