MC34063A

DC-DC Converter Control Circuits MC34063A ● OUTPUT SWITCH CURRENT IN EXCESS OF 1.5A ● 2% REFERENCE ACCURACY ● LOW QUIESCENT CURRENT:2.5mA(TYP.) ● OPERATING FROM 3V TO 40V ● REQUENCY OPERATION TO 100KHz ● ACTIVE CURRENT LIMITING DESCRIPTION The MC34063A series is a monolithic control circuit delivering the main functions for DC-DC voltage converting. The device contains an intermal temperature compensated reference, comparator, duty cycle controlled oscillator with an active current limit circuit driver and high current output switch. Output voltage is adjustable through two external resistors with a 2% reference accuracy. Employing a minimum number of external components the MC34063A devices series is designed for Step-Down, Step-Up and Voltage-lnverting applications. 8 SOP/ 8 DIP PIN Configulation Switch Collector Switch Emitter 1 2 8 Drive Collector 7 Ipk Sense Timing Capacitor 3 Ground 4 6 Vcc 5 Comparator - Input ORDERING INFORMATION Device Package MC34063AD 8 SOP MC34063AN 8 DIP BLOCK DIAGRAM Drive Collector 8 sQ R Switch Q2 1 Collector Q1 Ipk Sense 7 Vcc 6 Comparator lnverting 5 input Ipk Oscillator Comparator + - 1.25V Reference Regulator 2 Switch Emitter 3 Timing Capacitor 4 GND HTC 1 DC-DC Converter Control Circuits ABSOLUTE MAXIMUM RATINGS SYMBOL Vcc Vir VSWC VSWE VCE Vdc Idc Isw Ptot Top PARAMETER Power Supply Voltage Comparator input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VSWC=40V) Switch Collect...