IR3629 Datasheet, PDF (1/23 Pages) International Rectifier – HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT

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 R_DS(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}