SP7655

SP7655 Wide Input Voltage Range, 8Amp 300kHz, Buck Regulator Power Blox TM FEATURES ■ 2.5V to 28V Step Down Achieved Using Dual Input ■ Output Voltage down to 0.8V ■ 8A Output Capability ■ Built in Low RDSON Power Switches (15m 1 typ) ■ Highly Integrated Design, Minimal Components ■ 300 kHz Fixed Frequency Operation ■ UVLO Detects Both VCC and V IN ■ Over Temperature Protection ■ Short Circuit Protection with Auto-Restart ■ Wide BW Amp Allows Type II or III Compensation ■ Programmable Soft Start ■ Fast Transient Response ■ High Efficiency: Greater than 95%Possible ■ Non-synchronous Start-Up into a Pre-Charged Output ■ Lead Free, RoHS Compliant Package: Small 7mm x 4mm DFN ■ U.S. Patent #6,922,041 PGND 1 PGND 2 PGND 3 GND 4 VFB 5 COMP 6 UVIN 7 GND 8 SS 9 VIN 10 VIN 11 VIN 12 VIN 13 SP7655 DFN PACKAGE 7mm x 4mm TOP VIEW Heatsink Pad 1 Connect to Lx Heatsink Pad 2 Connect to GND Heatsink Pad 3 Connect toVIN 26 LX 25 LX 24 LX 23 LX 2 2 VCC 21 GND 20 GND 19 GND 18 BST 17 NC 16 LX 15 LX 14 LX DESCRIPTION The SP7655 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be especially attractive for dual supply, 12V or 24V distributed power systems stepped down with 5V used to power the controller. This lower VCCvoltage minimizes power dissipation in the part and is used to drive the top switch. The SP7655 is designed to provide a fully integrated buck regulator solution using a fixed 300kHz frequency, PWM voltage mode architec...