IR3638SPBF

Data Sheet No.PD94724 IR3638SPbF www.DataSheet4U.com HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER FOR TRACKING APPLIACTIONS Features Power up Sequencing / Tracking Enable Input Internal 400kHz Oscillator Programmable Soft-Start Fixed Frequency Voltage Mode Output Voltage as low as 0.6V Description The IR3638 controller IC is designed to provide a simple synchronous Buck regulator for on-board DC to DC applications in a 14-pin SOIC. The IR3638 is designed specifically for tracking applications by providing the track input. The IR3638 operates at a fixed internal 400kHz switching frequency allowing the use of small external components. The device features a programmable soft start set by an external capacitor, under-voltage lockout and output under-voltage detection that latches off the device when an output short is detected. Applications Tracking Applications Game Consoles Computing Peripheral Voltage Regulators Graphics Cards General DC/DC Converters 12V 5V C1 C2 C3 Vcc Vc HDrv Q1 D1 L1 Vout Q2 C7 V_CPUCore Vp / Enable LDrv SS C6 PGnd R1 Fb Gnd R2 Comp C4 C5 R3 Fig. 1: Typical Application Circuit ORDERING INFORMATION PKG PACKAGE DESIG DESCRIPTION S IR3638STRPbF PIN PARTS PARTS COUNT PER TUBE PER REEL 14 ---2500 T&R ORIANTAION Figure A 3/19/07 IR3638SPbF www.DataSheet4U.com ABSOLUTE MAXIMUM RATINGS Caution: Stresses beyond those listed below may cause permanent damage to the device. These are stress ratings only and function of t...