IRU3137CS IRF [International Rectifier], IRU3137CS Datasheet

IRU3137CS

Manufacturer Part Number

IRU3137CS

Description

8-PIN SYNCHRONOUS PWM CONTROLLER

Manufacturer

IRF [International Rectifier]

Datasheets

1.IRU3137.pdf (19 pages)

2.IRU3137CS.pdf (19 pages)

Current page: 1 of 19
Download datasheet (169Kb)

FEATURES

APPLICATIONS

TYPICAL APPLICATION

PACKAGE ORDER INFORMATION

Rev. 1.0

06/22/04

1A Peak Output Drive Capability

0.8V Reference Voltage

Shuts off both drivers at shorted output

and shutdown

Operating with single 5V or 12V supply voltage

Stable with ceramic capacitors

Internal 200KHz Oscillator

Soft-Start Function

Protects the output when control FET is shorted

Synchronous Controller in 8-Pin Package

DDR Memory Application

Low voltage distributed DC-DC

Graphic Cards

Low cost on-board DC to DC such as 5V to 2.5V,

1.8V or 0.8V

Optional

0.1uF

3300pF

1uF

30K

0 To 70

SS/SD

Comp

(°C)

Vcc

IRU3137

Gnd

IRU3137CS

DEVICE

Figure 1 - Typical application of IRU3137.

8-PIN SYNCHRONOUS PWM CONTROLLER

HDrv

LDrv

12V

1uF

1K, 1%

8-Pin Plastic SOIC NB (S)

www.irf.com

PACKAGE

DESCRIPTION

The IRU3137 controller IC is designed to provide a low

cost and high performance synchronous Buck regulator

for on-board DC to DC converter applications. The out-

put voltage can be set as low as 0.8V and higher voltage

can be obtained with an external voltage divider. High

peak current gate drivers provide fast switching transi-

tion for applications requiring high output current in the

range of 15A to 20A.

This device features an internal 200KHz oscillator, un-

der-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.

IRF7832

4x 150uF

2.15K

2.2uH

1uH

FREQUENCY

Optional

200KHz

Data Sheet No. PD94700

47uF

3x 330uF

40m , Poscap

IRU3137

2.5V

@ 15A

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