Datasheet > CM3728

CM3728

更新时间： 2024-09-26 23:42:31

品牌	Logo	应用领域
其他 - ETC		稳压器电池蜂窝电话
页数	文件大小	规格书
11页	269K
描述
2.5G/3G Cellular Phone Buck Regulator\|Battery Management ICs

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CM3728 数据手册

CM3728

2.5G/3G CELLULAR PHONE BUCK REGULATOR

GENERAL DESCRIPTION

FEATURES

The CM3728 low-dropout, pulse-width-modulated (PWM)

DC-DC buck regulator is optimized to provide power to the PA

in 2.5G/3G cellular phones; however, they may be applied in

many other applications where high efficiency is a priority. The

supply voltage range is from 2V to 5V, and the guaranteed

output current is 1.5A. 1.2MHz PWM switching allows for

small external components, while skip mode reduces

quiescent current to 220µA with light loads.

ꢀ

Patent Filed #6,452,366

1.2MHz switching and synchronization

Fast output setting slew rate < 30µs

Dynamic output-voltage adjustment from 0.8V to 4V

Source and sink up to 1.5A, no heat sink required

Integrated Power MOSFETs

Output voltage can be programmed by D/A converter

Minimum external components

The CM3728 is dynamically controlled to provide varying

output voltages from 0.8V to 4V. The circuit is designed such

that the output voltage settles in <30µs for a full-scale change

in voltage and current. The CM3728 is set with external

resistors to provide any fixed output voltage in the 1.25V to

5.5V range.

Shutdown < 1uA

Thermal shutdown protection

External Soft Start

8-pin PTSSOP power packages

No external Schottky diode required

The CM3728 includes a low on-resistance internal MOSFET

switch and synchronous rectifier to maximize efficiency and

minimize external component count. The device is offered in

space-saving 8-pin TSSOP package.

24 Hours Technical Support---WebSIM

Champion provides customers an online circuit simulation tool

called WebSIM. You could simply logon our website at

www.champion-micro.com for details.

APPLICATIONS

PIN CONFIGURATION

PTSSOP-8 (PT08)

Top View

ꢀ

2.5G/3G Cellular Phone

RF Transceiver

Microprocessor Core Supplies

PDA, Palmtop

PVDD

BATT

GND

Portable Computer

Hand-Held Instruments

PGND

VFB

VREF

2002/09/30 ^{Rev. 1.0}

Champion Microelectronic Corporation

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