SP6153

300kHz Synchronous Buck Controller with Frequency Synchronization SP6153 FEATURES „ 4.5V → 30V Input step down converter „ Built-in feedback compensation with feed forward „ Overcurrent circuit protection with auto-restart using FET RDSon sensing „ 300kHz fixed switching frequency „ External synchronization capable „ Up to 30A output capability „ Highly integrated design, minimal components „ UVLO detects both VCC and VIN „ Power Good and Fault Output „ On-board 1Ω sink (1.5Ω source) NFET drivers „ Programmable soft start „ Fast transient response „ High efficiency: Greater than 95% possible „ Evaluation boards available to aid in design Description The SP6153 has been designed to be implemented as synchronous step-down switching regulator. A complete high performance supply using Type III compensation can be created with as few as 11 external components. Compensation has been optimized based on output voltage and output capacitor selection. The SP6153 is designed to drive a pair of external N-Channel FETs using a fixed frequency, feed-forward PWM voltage mode architecture. Protection features include UVLO, thermal shutdown, current limit using FET RDSon and output short circuit protection. TYPICAL APPLICATION SCHEMATIC SP6153 6153 Wide Input Voltage Range PWM Controller 1 ©Copyright 2008 EXAR Corporation 2/06/08 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operat...