Datasheet > GM3326-4.5ST25R

GM3326-4.5ST25R

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
GAMMA		转换器开关
页数	文件大小	规格书
7页	223K
描述
PWM,PWM/PFM SWITCHING STEP-UP & DOWN DC/DC CONVERTER CONTROLLER ICS

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GM3326-4.5ST25R 数据手册

Description

Features

Input Voltage Range : 2.0V ~ 10V

GM3326 is step-up/down DC/DC converter controller ICs

with fast, and low ON resistance drivers built-in. A versatile

step-up/ down DC/DC converter can be realised by using

with large output current only 4 basic external components

- transistors, coils, diodes, and capacitors.

Output Voltage Range : 2.4V ~ 6.0V ( ± 2.5%

accuracy) (selectable in 0.1V steps)

Oscillation Frequency : 300KHz ( ± 15%

accuracy)

Output voltage is selectable in 0.1V steps within a 2.4V ~

6.0V ( ± 2.5% accuracy) range, and switching frequency is

set at or 300KHz.

Output Current : more than 250mA (V =2.4V,

=3.3V)

OUT

Efficiency : 81% (typ) at 5.0V, 78% (typ) at 3.3V

Stand-By : ISTB = 0.5µA (max)

Output Voltage Internal Set-Up

SOT-25 Package

GM3326 switches from PWM to PFM control during light

loads, and the series offers high efficiencies from light

loads through to large output currents.

Soft-start time is internally set to 10 msec, which offers

protection against rush currents when the power is

switched on and also against voltage overshoot.

During shutdown (CE pin = L), consumption current can be

reduced to as little as 0.5µA or less.

Application

Mobile phones

PDAs

Portable audio equipment

Various power supplies

Palmtop computers

TYPICAL APPLICATION CIRCUITS

3L colis SMTSPR5D5047C-220

Youth coils YCDH57-220

Schottky

MBRS140

Pch MOSFET

FDN338P

OUT

Nch MOSFET

FDN339AN

Schottky

MBRS140

OUT

EXT

GM3326

GND

68µF/ 10V

Chemi_con

PT- Series

100µF/ 10V

Chemi_con

PT- Series

www.gammamicro.com

12 3 4 5 6 7

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