SP7661

www.DataSheet4U.com SP7661 Wide Input Voltage Range 3A, 600kHz, Buck Regulator FEATURES SP7661 DFN PACKAGE 7mm x 4mm (Option 2) LX 26 LX 25 LX 24 LX 23 VCC 22 Pin 27 1 BOTTOM VIEW Heatsink Pad 1 Connect to Lx 2 3 4 5 6 7 Heatsink Pad 2 Connect to GND Pin 28 Heatsink Pad 3 Connect to VIN Pin 29 8 9 PGND PGND PGND PGND GND VFB COMP SS GND PowerBlox TM ■ 4.75V to 22V Input Voltage Range using Single Supply ■ 3V to 22V Input Voltage Range using Dual Supply ■ ±1% 0.8V Reference ■ 3A Output Capability ■ Current Limiting using Inductor DCR ■ Built in Low RDS(ON) Power Switches ■ 600kHz Fixed Frequency Operation ■ 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 93% Possible ■ Nonsynchronous Start-Up into a Pre-Charged Output ■ Available in RoHS Compliant, Lead Free Packaging: Small 7mm x 4mm DFN ■ U.S. Patent #6,922,041 UVIN 21 GND 20 GND 19 VIN 18 BST 17 LX 16 LX 15 LX 14 10 ISN 11 ISP 12 SWN 13 VINP DESCRIPTION The SP7661 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed for use with a single 4.75V to 22V single supply or 3V to 22V input if an external Vcc is provided. The SP7661 provides a fully integrated buck regulator solution using a fixed 600kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown, output c...