Datasheet > SC1404_05

SC1404_05

更新时间： 2024-01-13 20:14:22

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
25页	458K
描述
Mobile Multi-Output PWM Controller with Virtual Current SenseTM

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SC1404_05 数据手册

SC1404

Mobile Multi-Output PWM Controller

with Virtual Current Sense^TM

POWER MANAGEMENT

Description

Features

ꢀ 6 to 30V input range (operation possible below 6V)

ꢀ 3.3V and 5V dual synchronous outputs

ꢀ Fixed-frequency or PSAVE for maximum efficiency over

wide load current range

The SC1404 is a multiple-output power supply controller designed

for battery operated systems. The SC1404 provides synchronous

rectified buck converter control for two power supplies. An effi-

ciency of 95% can be achieved. The SC1404 uses Semtech’s

proprietary Virtual Current Sense^TMtechnology along with external

error amplifier compensation to achieve enhanced stability and

DC accuracy over a wide range of output filter components while

maintaining fixed frequency operation. The SC1404 also pro-

vides two linear regulators for system housekeeping. The 5V lin-

ear regulator takes its input from the battery; for efficiency, the

output is switched to the 5V output when available. The 12V lin-

ear regulator output is generated from a coupled inductor off the

5V switching regulator.

ꢀ 5V/50mA linear regulator

ꢀ 12V/200mA linear regulator

ꢀ Virtual Current Sense ^TMfor enhanced stability

ꢀ Accurate low-loss current limiting

ꢀ Out-of-phase switching reduces input capacitance

ꢀ External compensation supports wide range of

output filter components for reduced cost

ꢀ Programmable power-up sequence

ꢀ Power Good output

ꢀ Output overvoltage & overcurrent protection with output

undervoltage shutdown

ꢀ 4µA typical shutdown current

Control functions include: power up sequencing, soft start, power-

good signaling, and frequency synchronization. Line and load

regulation is to +/-1% of the output voltage. The internal oscilla-

tor can be adjusted to 200 kHz or 300 kHz 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

ꢀ Automotive Electronics

The SC1404 includes a PSAVE# input to select pulse skipping

mode for high efficiency at light load, or fixed frequency mode for

low noise operation.

ꢀ

Desktop DC-DC Converters

Typical Application Circuit

www.semtech.com

Revision: May 19, 2004

12 3 4 5 6 7...25

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与SC1404_05相关器件

型号	品牌	获取价格	描述	数据表
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
SC1405B.TR	SEMTECH	获取价格	Half Bridge Based MOSFET Driver, 3A, CMOS, PDSO14, 0.635 MM PITCH, MO-153AB1, TSSOP-14
SC1405B.TRT	SEMTECH	获取价格	Half Bridge Based MOSFET Driver, 3A, PDSO14, 0.635 MM PITCH, MO-153AB1, TSSOP-14
SC1405BT	SEMTECH	获取价格	Half Bridge Based MOSFET Driver, 2A, PDSO14, 0.635 MM PITCH, MO-153AB1, TSSOP-14
SC1405BTR	SEMTECH	获取价格	Half Bridge Based MOSFET Driver, 2A, CMOS, PDSO14, 0.635 MM PITCH, MO-153AB1, TSSOP-14

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