Integrated Circuit Chip DC-DC Converter Control Circuits MC34063A

1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS

DESCRIPTION/ORDERING INFORMATION

The MC33063A and MC34063A are easy-to-use ICs containing all the primary circuitry needed for building simple dc-dc converters. These devices primarily consist of an internal temperature-compensated reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and inverting topologies. The MC33063A is characterized for operation from –40°C to 85°C, while the MC34063A is characterized for operation from 0°C to 70°C.

FEATURES

• Wide Input Voltage Range: 3 V to 40 V

• Precision Internal Reference: 2%

• High Output Switch Current: Up to 1.5 A

• Short-Circuit Current Limiting

• Adjustable Output Voltage

• Low Standby Current

• Oscillator Frequency Up to 100 kHz

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