SC198

更新时间： 2024-10-01 04:05:31

品牌	Logo	应用领域
商升特 - SEMTECH		转换器
页数	文件大小	规格书
16页	397K
描述
Dual DC-DC Buck Converter with High Current Capability

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SC198 数据手册

SC198

Dual DC-DC Buck Converter

with High Current Capability

POWER MANAGEMENT

Features

Description

The SC198 is a high-efﬁciency, dual synchronous buck ꢀ Dual Buck Converters with Independent Control

converter designed for use in low power applications. Each ꢀ High Efﬁciency - Over 90% Peak

converter is capable of supplying up to 600mA of average ꢀ 8 Programmable Output Voltages

current at one of eight programmable output voltages ꢀ Input Voltage Range Between 2.7V to 5.5V

commonly used as microprocessor supply voltages.

ꢀ Fixed-Frequency Operation - 1MHz

ꢀ Optional SYNC Clock Input

The SC198 uses a single control logic block for the two ꢀ Optional Power-Save Under Light-Load Conditions

converters, but their controls can be set independently. ꢀ Shutdown Current <1μA

The SC198 employs a ﬂexible clocking scheme that ꢀ Soft-Start to Limit In-Rush Current

allows the user to use the ﬁxed internal 1MHz oscillator or ꢀ 4mm x 4mm MLPQ Package

synchronize the clock to an external source. The device

also has an optional power-save mode that optimizes

efﬁciency for light loads.

The SC198 provides output voltage ﬂexibility while

conserving board space by using control pins to select

the output voltage instead of external resistor voltage

divider circuits. This eliminates at least four parts from

the traditional dual buck converter bill of materials.

Applications

ꢀ Mobile Phones

ꢀ Cordless Phones

ꢀ MP3 Players

ꢀ Digital Cameras

ꢀ PDAs

ꢀ Single Li-ion Cell or (3) NiMH/NiCd Cell Devices

ꢀ Digital Multimedia Broadcast (DMB) Devices

ꢀ Portable Gaming Systems

Typical Application Circuit

SC198

4.7μH

VOUTA

VINA

LXA

VOUTA

GNDA

VINR

VINB

10μF

ENA

10μF

CTLA0

CTLA1

CTLA2

ENB

4.7μH

VOUTB

LXB

VOUTB

GNDB

10μF

CTLB0

CTLB1

CTLB2

SYNC

GNDR

www.semtech.com

October 19, 2006

12 3 4 5 6 7...16

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