IRU3137 Datasheet

IC型號：
IRU3137
PDF描述：
8-PIN SYNCHRONOUS PWM CONTROLLER
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169.83KB
PDF頁數(shù)：
19頁
芯片廠家：
IRF

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Data Sheet No. PD94700

IRU3137

8-PIN SYNCHRONOUS PWM CONTROLLER

FEATURES

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

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.

APPLICATIONS

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

TYPICAL APPLICATION

12V

1uF

4x 150uF

Optional

1uH

47uF

Vcc

HDrv

IRF7832

2.2uH

SS/SD

0.1uF

IRU3137

Comp

LDrv

IRF7832

2.5V

@ 15A

3x 330uF

40m

鈩?/div>

, Poscap

3300pF

Optional

30K

Gnd

1K, 1%

2.15K

Figure 1 - Typical application of IRU3137.

PACKAGE ORDER INFORMATION

(擄C)

0 To 70

Rev. 1.0

06/22/04

DEVICE

IRU3137CS

PACKAGE

8-Pin Plastic SOIC NB (S)

www.irf.com

FREQUENCY

200KHz

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