IRU3138

更新时间： 2024-11-17 22:48:03

品牌	Logo	应用领域
英飞凌 - INFINEON		控制器
页数	文件大小	规格书
18页	280K
描述
SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS

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数据手册

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IRU3138 数据手册

Data Sheet No. PD94701

IRU3138

SYNCHRONOUS PWM CONTROLLER

FOR TERMINATION POWER SUPPLY APPLICATIONS

FEATURES

DESCRIPTION

1A Peak Output Drive Capability

0.8V Precision Reference Voltage Available

Shuts off both drivers at shorted output

and shutdown

The IRU3138 controller IC is designed to provide a low

cost synchronous Buck regulator for voltage tracking

applications such DDR memory and general purpose

on-board DC to DC converter. Modern micro processors

combined with DDR memory, need high-speed bandwidth

data bus which requires a particular bus termination volt-

age. This voltage will be tightly regulated to track the

half of chipset voltage for best performance. The IRU3138

together with two N-channel MOSFETs, provide a low

cost solution for such applications. This device features

a programmable frequency set from 200KHz to 400KHz,

under-voltage lockout for both Vcc and Vc supplies, an

external programmable soft-start function as well as

output under-voltage detection that latches off the de-

vice when an output short is detected.

200KHz to 400KHz operation set by an external

resistor

Soft-Start Function

Uncommitted Error Amplifier available for DDR

voltage tracking application

Protects the output when control FET is shorted

Synchronous Controller in 14-Pin Package

APPLICATIONS

DDR memory source sink Vtt application

Graphic Card

Low cost on-board DC to DC such as

5V to 3.3V, 2.5V or 1.8V

TYPICAL APPLICATION

VDDQ

12V

(2.5V)

1uH

0.1uF

1uF

2x 47uF

47uF

Vcc

DDR

VREF

HDrv

Memory

IRF7460

BAT54

SS/SD

IRU3138

Vtt

1.25V @ 10A

0.1uF

3.3uH

IRF7456

LDrv

2x 150uF

40m Ω

PGnd

Comp

3300pF

13K

Gnd

Figure 1 - Typical application of IRU3138 when VTT tracks the VDDQ.

PACKAGE ORDER INFORMATION

TA (°C)

DEVICE

PACKAGE

0 To 70

IRU3138CS

14-Pin Plastic SOIC NB (S)

Rev. 1.0

01/29/04

www.irf.com

12 3 4 5 6 7...18

中文翻译

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与IRU3138相关器件

型号	品牌	获取价格	描述	数据表
IRU3138CS	INFINEON	获取价格	SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS
IRU3138CSPBF	INFINEON	获取价格	Switching Regulator/Controller, Voltage-mode, 440kHz Switching Freq-Max, BIPolar, PDSO14,
IRU3138CSTR	INFINEON	获取价格	Switching Regulator/Controller, Voltage-mode, 440kHz Switching Freq-Max, BIPolar, PDSO14
IRU3138CSTRPBF	INFINEON	获取价格	Switching Regulator/Controller, Voltage-mode, 440kHz Switching Freq-Max, BIPolar, PDSO14,
IRU3146	INFINEON	获取价格	DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND AUTO-RESTART
IRU3146CF	INFINEON	获取价格	DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND AUTO-RESTART
IRU3146CFTR	INFINEON	获取价格	Switching Controller, Current-mode, 345kHz Switching Freq-Max, PDSO28, TSSOP-28
IRU3146CFTRPBF	INFINEON	获取价格	Switching Controller, Current-mode, 345kHz Switching Freq-Max, PDSO28, TSSOP-28
IRU431AL	INFINEON	获取价格	LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
IRU431ALCL3	INFINEON	获取价格	LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

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