IRU3073

更新时间： 2024-09-16 03:44:35

品牌	Logo	应用领域
英飞凌 - INFINEON		过电流保护控制器
页数	文件大小	规格书
21页	237K
描述
SYNCHRONOUS PWM CONTROLLER WITH OVER-CURRENT PROTECTION / LDO CONTROLLER

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数据手册

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IRU3073 数据手册

Data Sheet No. PD94699

IRU3073

SYNCHRONOUS PWM CONTROLLER WITH

OVER-CURRENT PROTECTION / LDO CONTROLLER

FEATURES

DESCRIPTION

Synchronous Controller plus one LDO controller

Current Limit using MOSFET Sensing

Single 5V/12V Supply Operation

Programmable Switching Frequency up to

400KHz

The IRU3073 controller IC is designed to provide a low

cost synchronous Buck regulator for on-board DC to DC

converter for multiple output applications.

The outputs can be programmed as low as 0.8V for low

voltage applications.

Soft-Start Function

Fixed Frequency Voltage Mode

Precision Reference Voltage Available

Uncommitted Error Amplifier available for DDR

voltage tracking application

Selectable over-current protection is provided by using

external MOSFET's on-resistance for optimum cost and

performance.

This device features a programmable frequency set from

200KHz to 400KHz, under-voltage lockout for all input

supplies, an external programmable soft-start function

as well as output under-voltage detection that latches

off the device when an output short is detected.

APPLICATIONS

DDR memory source sink VTT application

Low cost on-board DC to DC such as

12V/5V to output voltages as low as 0.8V

Graphic Card

Hard Disk Drive

Multi-Output Applications

TYPICAL APPLICATION

3.3V

Vcc

12V

Drv2

Fb2

VOUT2

VcH

VcL

+5V

IRU3073

HDrv

0.1uF

VREF

OCSet

LDrv

VOUT1

Comp

C10

SS/SD

R10

C11

Fb1

Gnd

PGnd

R11

Figure 1 - Typical application of IRU3073.

PACKAGE ORDER INFORMATION

TA (°C)

DEVICE

PACKAGE

0 To 70

IRU3073CQ

16-Pin Plastic QSOP NB (Q)

Rev. 1.0

09/17/03

www.irf.com

12 3 4 5 6 7...21

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