Datasheet > G5719

G5719

更新时间： 2024-11-16 01:24:43

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页数	文件大小	规格书
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描述
1MHz, 2A Synchronous Step-Down Regulator

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G5719 数据手册

Global Mixed-mode Technology

G5719

1MHz, 2A Synchronous Step-Down Regulator

General Description

Features

The G5719 is a high efficiency monolithic synchronous

buck regulator using a constant frequency, current

mode architecture. Supply current during operation is

only 50µA and drops to <1µA in shutdown. The 2.5V

to 6V input voltage range makes the G5719 ideally

suited for single Li-Ion battery-powered applications.

100% duty cycle provides low dropout operation, ex-

tending battery run time in portable systems. Switching

frequency is internally set at 1MHz, allowing the use of

small surface mount inductors and capacitors. The

internal synchronous switch increase efficiency and

eliminates the need for an external Schottky diode.

Built-in soft start function eliminates in-rush current

that could damage the system.

High Efficiency: Up to 95%

Low Quiescent Current: Only 50µA During Op-

eration

Internal Soft Start Function

2A Output Current

2.5V to 6V Input Voltage Range

1MHz Switching Frequency

No Schottky Diode Required

100% Duty Cycle in Dropout Operation

0.6V Reference Allows Low Output Voltages

<1µA Shutdown Current

Current Mode Operation for Excellent Line and

Load Transient Response

Over Temperature Protected

RoHS Compliant

Applications

Cellular Telephones

Personal Information Appliances

Microprocessors and DSP Core Supplies

Wireless and DSL Modems

Digital Still and Video Cameras

MP3 Players

Portable Instruments

Ordering Information

ORDER

NUMBER

TEMP.

RANGE

PACKAGE

(Green)

OUTPUT

VOLTAGE

MARKING

G5719TB1U

5719x

Adjustable

-40°C to +85°C

SOT-23-6

Note: TB: SOT-23-6

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

G5719

2.2µH

V_IN

4~6V

V_OUT

3.3V

VIN

GND

VFB

_FB* (option)

C_IN

2.2µF

CER

C_OUT

10µF

CER

VFB

VIN

82k

GND

18k

SOT-23-6

V_OUT= 0.6V • (1+

)

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.4

Oct 19, 2012

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