MC34063

( DataSheet : www.DataSheet4U.com ) UTC MC34063 LINEAR INTEGRATED CIRCUIT DC TO DC CONVERTER CONTROLLER DESCRIPTION The UTC MC34063 is a monolithic regulator subsystem, intended for use as DC to DC converter. This device contains a temperature compensated band gap reference, a duty-cycle control oscillator, driver and high current output switch. It can be used for step down, step-up or inverting switching regulators as well as for series pass regulators. SOP-8 FEATURES *Operation from 3.0V to 40V. *Short circuit current limiting. *Low standby current. *Output switch current of 1.5A without external transistors. *Frequency of operation from 100Hz to 100kHz. *Step-up, step-down or inverting switch regulators. DIP-8 PIN CONFIGURATION Switch Collector Switch Emitter Timing Capacitor 1 8 Driver Collector 2 7 Lpk Sense 3 6 Vcc Gnd 4 5 Comparator Inverting input BLOCK DIAGRAM E SWITCH COLLECTOR T2 S R T1 SWITCH EMITTER D C Is A TIMING CAPACITOR CT OSCILLATOR 1 Q 8 DRIVE COLLECTOR 2 7 Ipeak SENSE 3 6 Vcc COMP. GND 4 1.25Vref B 5 COMPARATOR INVERTING INPUT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R103-001,B www.DataSheet4U.com www.DataSheet4U.com UTC MC34063 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS(Ta=25°C ) PARAMETER Supply Voltage Comparator input voltage range Switch collector voltage Switch Emitter Voltage Switch collector to emitter voltage Driver collector Voltage Switch current Power Dissipation (Ta=25°C) DIP SOP Thermal Characteri...