Description
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.

FEATUREs
• 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