Datasheet > G5603

G5603

更新时间： 2024-11-15 01:25:23

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描述
High-Speed Step-Down Controller

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G5603 数据手册

G5603

Global Mixed-mode Technology Inc.

High-Speed Step-Down Controller

Features

General Description

Ultra-High Efficiency

No Current-Sense Resistor (Lossless I_LIMIT

G5603 uses constant on-time control scheme to han-

dle wide input/output voltage ratios with ease and pro-

vides 100ns “instant-on” response to load transients

while maintaining a relatively constant switching fre-

quency. The G5603 achieves high efficiency at a re-

duced cost by eliminating the current-sense resistor

found in traditional current-mode PWMs. Efficiency is

further enhanced by an ability to drive very large syn-

chronous rectifier MOSFETs. Single-stage buck con-

version allows these devices to directly step down

high-voltage batteries for the highest possible effi-

ciency. Alternatively, two-stage conversion (stepping

down the +5V system supply instead of the battery) at

a higher switching frequency allows the minimum pos-

sible physical size. The G5603 is intended for CPU

core, chipset, DRAM, or other low-voltage supplies as

low as 0.75V. The G5603 is available in TSSOP-14 、

)

Quasi-PWM with 100ns Load-Step Response

1% VOUT Accuracy Over Line and Load

0.75V to 3.6V Adjustable Output Range

4.5V to 24V Battery Input Range

Integrated Boost Diode

OVP & UVP

1.7ms Soft-Start

Drives Large Synchronous-Rectifier FETs

Power-Good Indicator

Applications

Notebook Computers

CPU Core Supply

I/O Supply

Chipset/RAM Supply as Low as 0.75V

Networking Power Supply

TQFN3X3-16 and TQFN3.5X3.5-14 package and in-

cludes over voltage protection.

Ordering Information

ORDER

NUMBER

G5603D21U

G5603R41U

G5603RU1U

TEMP.

RANGE

PACKAGE

(Green)

MARKING

G5603

5603

-40°C to +85°C

TSSOP-14

TQFN3X3-16

TQFN3.5x3.5-14

5603

Note: D2: TSSOP-14

1: Bonding Code

U : Tape & Reel

RU: TQFN3.5x3.5-14

R4: TQFN3X3-16

Pin Configuration

G5603

14 BST

EN_SKIP

TON

OUT

12 DH

BST

PGND

OUT

VCC

11 LX

Thermal

Pad

Thermal

Pad

10 ILIM

ILIM

VCC

AGND

EN_SKIP

PGOOD

VDD

10 VDD

PGOOD

AGND

PGND

G5603 TQFN3X3-16

G5603 TQFN3.5X3.5-14

TSSOP-14

Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.92

Mar 25, 2011

中文翻译

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