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IR3640MPBF fiches techniques PDF

International Rectifier - HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

Numéro de référence IR3640MPBF
Description HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Fabricant International Rectifier 
Logo International Rectifier 





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IR3640MPBF fiche technique
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PD97401
IR3640MPBF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Features
• 4.5V to 5.5V external supply
• Wide Input voltage from 1.5V to 24V
• Output voltage range: 0.7V to 0.9*Vin
• Programmable switching frequency up to 1.5MHz
• Programmable Soft-start
• Hiccup mode over current protection using Rds(on)
sensing
• Programmable OCP
• Reference voltage 0.7V (+/-1%, 0oC <Tj<125oC)
• Enhanced Pre-bias start up
• Output voltage tracking
• Integrated MOSFET drivers and bootstrap diode
• Operating temp: -40oC <Tj<125oC
• External synchronization
• Power Good output
• Thermal shut down
• Over voltage protection
• Enable Input with voltage monitoring capability
• Pb-Free & Halogen-Free (RoHS Compliant)
• 20 -Lead MLPQ package (3mmx4mm)
Applications
Point of Load Power Architectures
Server & Netcom Applications
Game Consoles
General DC/DC Converters
Description
The IR3640M is a synchronous Buck PWM controller
designed for performance demanding DC/DC
applications. The single loop voltage mode
architecture simplifies design while delivery precise
output voltage regulation and fast transient response.
Because of its wide input and output voltage range it
can be used in a large variety of point of load
applications within a system and across different
markets.
The part is designed to drive a pair of N-Channel
MOSFETs from 250kHz to 1.5Mhz switching
frequency giving designers the flexibility to optimize
the solution for best efficiency or smallest footprint.
The output voltage can be precisely regulated from as
low as 0.7V within a tolerance of +/-1% over
temperature, line and load variations.
The device also integrates a diversity of features
including; programmable soft start, pre-bias start up,
voltage tracking, external synchronization, enable
input and Power Good output. Fault protection
features include thermal shutdown, over voltage and
over current shutdown and under voltage lock out.
Typical Application
06/15/2009
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