IR3628MPBF Datasheet, PDF (1/22 Pages) International Rectifier – HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

Data Sheet No PD94725
IR3628MPbF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Features
• Internal 600kHz Oscillator
• Operates with Single 5V or 12V Supply
• Programmable Over Current Protection
• Hiccup Current Limit Using MOSFET R_DS(on)
sensing
• Tracking for memory application
• Precision Reference Voltage (0.6V)
• Programmable Soft-Start
• Pre-Bias Start-up
• Thermal Protection
• 12-Lead 3x4mm MLPD Package
Applications
• DDR Application
• Storage Systems
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Computing Peripheral Voltage Regulator
• Graphics Card
• General DC/DC Converters
Description
The IR3628 is a PWM controller designed for
high performance synchronous Buck DC/DC
applications. The IR3628 drives a pair of external
N-MOSFETs using a fixed 600kHz 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. IR3628
provides an efficient solution for high-speed
bandwidth data bus which requires a particular
tracking scheme for best performance using the
uncommitted error amplifier.
Protection such as Pre-Bias startup, hiccup
current limit and thermal shutdown are provided
to give required system level security in the event
of fault conditions.
08/10/2007
Fig. 1: Typical application Circuit
ORDERING INFORMATION
PKG PACKAGE
DESIG DESCRIPTION
M
IR3628MPBF
M
IR3628MTRPBF
PIN
COUNT
12
12
PARTS
PER TUBE
122
--------
PARTS
PER REEL
-------
3000
T&R
ORIANTAION
Figure A