MIK34063A

Replacement of MC34063A MIK34063A DC-to-DC Converter Control Circuits October 1997 – revised November 1999 Description The MIK34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step-Down and Step-Up and VoltageInverting applications with a minimum number of external components. Features Operation from 3.0 V to 40 V Input Low Standby Current Current Limiting Output Switch Current to 1.5 A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference Pin connections Schematic Diagram Driver Collector 8 S R Q Q2 Q1 100 1 Switch Collector Ipk Sense 7 Ipk C Oscillator T Comparator 2 3 Switch Emitter Timing Capacitor Comparator Inverting Input 5 Absolute Maximum Ratings Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW TJ TA Tstg Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPIN1 = 40 V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Maximum 40 -0.3 to +40 40 40 40 40 100 1.5 +150 0...