IR3637SPBF

www.DataSheet4U.com Data Sheet No. PD94713 IR3637SPBF 1% ACCURATE SYNCHRONOUS PWM CONTROLLER FEATURES 0.8V Reference Voltage Operates with a single 5V Supply Voltage Internal 400kHz Oscillator Soft-Start Function Fixed Frequency Voltage Mode Short Circuit Protection DESCRIPTION The IR3637 controller IC is designed to provide a simple synchronous Buck regulator for on-board DC to DC applications in a small 8-pin SOIC. The output voltage can be precisely regulated using the internal 0.8V reference voltage for low voltage applications. The IR3637 operates at a fixed internal 400kHz switching frequency to reduce the component size. The device features under-voltage lockout for both input supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when an output short is detected. APPLICATIONS Computer Peripheral Voltage Regulator Memory Power supplies Graphics Card Low cost on-board DC to DC TYPICAL APPLICATION 12V C3 5V C2 C1 Vc Vcc HDrv Q1 D1 L1 Vout Q2 C6 SS/SD C4 IR3637 LDrv C5 R1 m Comp Fb Gnd R2 R3 4U .co eet Figure 1 - Typical application of IR3637. Sh ORDERING INFORMATION PKG DESIG S S PACKAGE PIN PARTS PARTS T&R DESCRIPTION COUNT PER TUBE PER REEL Oriantation IR3637SPBF 8 95 -----Fig A IR3637STRPBF 8 ------2500 w.D ata Rev. 1.1 06/16/05 www.irf.com ww 1 www.DataSheet4U.com IR3637SPBF ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage ................................................ Vc Su...