The MC34063A Inverting Switching Regulators Series Datasheet and Circuit Diagrams
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If you need to design a Step-Up, Step-Down and Voltage-Inverting applications with a minimum number of external 
components, you may consider The MC34063A Inverting Switching Regulators Series since this device are specifically designed to be incorporated with those purposes. The circuit diagram below is one of MC34063A DC-to-DC Converter Control Circuit which perform Step–Up Converter schematic (click to enlarge).
As stated in the datasheet, The MC34063A operates from 3V to 40V input voltage and consist of a monolithic control circuit containing the primary functions required for DC–to–DC converters. It has low standby current, current limiting, up to 1.5A of output switch current, an output voltage adjustable, and up to 100kHz of frquency operation in its features.
You will see another MC34063A circuit diagrams within the datasheet such as Chip Diagrams & Pads Coordinates, Step-Down Converter Schematic, and Voltage Inverting Converter Schematic. Complete read of The MC34063A Inverting Switching Regulators Series and Circuit Diagrams can be found in The MC34063A datasheet (source: onsemi.com).
Tags: Circuit Diagram, Converter Datasheet, DC Converter, dc dc converters, step up converter
