MC34063

The MC34063 is a type of monolithic control circuit which contains the primary functions required for DCtoDC converters. MC34063 consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch.

Features of the MC34063 are:(1)operation from 3.0 V to 40 V input; (2)low standby Current; (3)current limiting; (4)output switch current to 1.5 A; (5)output voltage adjustable; (6)frequency operation to 100 kHz; (7)precision 2% reference.

The absolute maximum ratings of the MC34063 can be summarized as:(1): power supply voltage(VCC) is 40 Vdc; (2): comparator input voltage range(VIR) is 0.3 Vdc to +40 Vdc; (3): switch collector voltage(VC(switch)) is 40 Vdc; (4): switch emitter voltage (VPin 1 = 40 V)(VE(switch)) is 40 Vdc; (5): switch collector to emitter voltage(VCE(switch)) is 40 Vdc; (6): driver collector voltage(VC(driver)) is 40 Vdc; (7): driver collector current(IC(driver)) is 100 mA; (8): switch current(ISW) is 1.5 A; (9): operating junction temperature(TJ) is +150 °C; (10): storage temperature range(Tstg) is 65 °C to +150 °C.