Datasheet > G5723

G5723

更新时间： 2024-11-16 01:24:43

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描述
Synchronous Buck Converter with Low-Noise LDO Regulator

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数据手册

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G5723 数据手册

Global Mixed-mode Technology Inc.

G5723

Synchronous Buck Converter with Low-Noise LDO

Regulator

Features

Applications

Digital Still and Video Cameras

MP3 Players

Buck Converter

High Efficiency: Up to 95%

Portable Instruments

Low Quiescent Current: Only 50µA During Op-

eration

Internal Soft Start Function

600mA Output Current

2.5V to 6V Input Voltage Range

1.2MHz Switching Frequency

No Schottky Diode Required

100% Duty Cycle in Dropout Operation

0.6V Reference Allows Low Output Voltages

<1µA Shutdown Current

General Description

The G5723 consists of a synchronous step-down

DC/DC converter and a low-noise LDO regulator. The

DC/DC converter is operated on current mode archi-

tecture. Switching frequency is set at 1.2MHz allowing

the use of small surface mount inductor and capacitor.

The internal synchronous switches increase efficiency

and eliminate the need for external Schottky diode. It

is ideal for system powered by a 1-cell Li-ion battery.

Current Mode Operation for Excellent Line and

Load Transient Response

LDO Regulator

Ultra Low Output Noise 30µV (rms)

Ultra Low 55µA No-Load Supply Current

Ultra Low Dropout 70mV @ 50mA Load

Guarantee 300mA Output Current

Fixed Mode: No External Resistor Network

Needed

Max. Supply Current in Shutdown Mode < 1µA

Stable with Low Cost Ceramic Capacitors

Over Temperature Protected

RoHS Compliant

Ordering Information

ORDER

NUMBER

TEMP.

RANGE

PACKAGE

(Green)

MARKING

VOLTAGE

G5723-18P71U

G5723-30P71U

G5723-33P71U

G5723G

G5723E

G5723F

1.8V

3.0V

3.3V

-40°C to +85°C

MSOP-10

Note: P7: MSOP-10

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

G5723

2.2µH

V_OUT1

1.2V

600mA

C_OUT1

10µF

V_IN

3.3~4.2V

IN1

G5723

_FB* (option)

C_IN1

2.2µF

BATTERY

EN1

AGND

FB1

EN1

FB1

PGND

IN1

18K

IN2

OUT2

AGND

C_IN2

1µF

IN2

EN2

V_OUT2

EN2

OUT2

MSOP-10

AGND PGND

C_OUT2

4.7µF

V_OUT1= 0.6V × (1+

)

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.4

Aug 30, 2010

中文翻译

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