STMicroelectronics MC34063A DC-DC Converter Controller IC SMD SOIC-8

STMicroelectronics MC34063A DC-DC Converter Controller IC is a DC-DC converter controller for buck, boost and voltage-inverting configurations, supplied in a compact SOIC-8 surface-mount package with a 1.5A output switch and a 3V to 40V input range.

Overview

The MC34063A is a monolithic control circuit for DC-DC voltage conversion. It provides the essential functions needed for step-down (buck), step-up (boost) and voltage-inverting applications, making it suitable for a wide range of power supply designs. The internal architecture includes a temperature-compensated voltage reference, a comparator, a duty-cycle-controlled oscillator with active current limiting, a driver and a high-current output switch.

Key Features

• Adjustable output voltage set by two external resistors
• 2% reference accuracy
• Input voltage range of 3V to 40V
• Output switch current exceeding 1.5A
• Typical quiescent current of 2.5mA
• Active current limiting for protection

Performance

The controller supports a switching frequency of up to 100kHz, with a typical frequency of 33kHz, which contributes to compact inductor and capacitor sizing. It is specified for an ambient temperature range of -40°C to +85°C and is suitable for both battery-powered and line-operated equipment. Typical efficiency is 89%.

Specifications

• Topology: Buck, Boost and Inverting configurations
• Output Voltage Range: Adjustable from 1.25V to 38V
• Max Output Current: 1.5A
• Package: 8-pin SOIC (Surface-Mount)
• Width: 3.3, Depth: 1.5, Height: 4.3
• Weight: 0.08 g

Choose the STMicroelectronics MC34063A when a compact SOIC-8 DC-DC controller is required for buck, boost or voltage-inverting power supply designs.