Mc34063; Description; Features; Pin Connections - Hitachi 22LD4500UK Service Manual

11.19. MC34063

11.19.1. Description

The MC34063A 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 Voltage–Inverting
applications with a minimum number of external components.

11.19.2. 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

11.19.3. Pin connections

24