IR3629 データシートの表示（PDF） - International Rectifier

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IR3629

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT

International Rectifier 

Data Sheet No. PD94726

IR3629/IR3629A MPbF

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

WITH POWER GOOD OUTPUT

Features

Description

• Internal 600kHz Oscillator (300kHz “A version”)

• Operates with Single 5V or 12V Supply

• Programmable Over Current Protection

• Hiccup Current Limit Using MOSFET RDS(on)

sensing

• Precision Reference Voltage (0.6V)

• Programmable Soft-Start

• Programmable PGood output

• Pre-Bias Start-up

• Thermal Protection

• 12-Lead MLP Package

Applications

• Distributed Point-of-Loads

• Embedded Systems

• Storage Systems

• DDR Applications

• Graphics Cards

• Computing Peripheral Voltage Regulators

• General DC-DC Converters

The IR3629/IR3629A is a PWM controller

designed for high performance synchronous Buck

DC/DC applications. The IR3629/IR3629A drives

a pair of external N-MOSFETs using a fixed

600kHz (300kHz “A version”) switching frequency

allowing the use of small external components.

The output voltage can be precisely regulated

using the internal 0.6V reference voltage for low

voltage applications. Protection such as Pre-Bias

startup, hiccup current limit and thermal shutdown

provide the required system level security in the

event of fault conditions.

11/26/2007

Fig. 1: Typical application Circuit

ORDERING INFORMATION

PKG PACKAGE

PIN

DESIG DESCRIPTION

COUNT

M

IR3629/IR3629AMPBF 12

M

IR3629/IR3629AMTRPBF 12

PARTS PARTS T&R

PER TUBE PER REEL ORIENTATION

122

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-------- 3000 Figure A

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