Texas Instruments MC34063A Switching Regulator IC SOIC-8

The Texas Instruments MC34063A Switching Regulator IC SOIC-8 is a DC-DC switching regulator that simplifies the construction of efficient power conversion circuits, offering an adjustable output voltage from 1.25 V to 40 V.

Overview

Encased in a compact SOIC-8 package, the MC34063A incorporates the essential primary circuitry required for building buck (step-down), boost (step-up) and inverting converters with a minimal number of external components. Its internal temperature-compensated voltage reference provides 2% precision for stable and accurate output regulation. The device combines a controlled duty cycle oscillator, a PWM controller with active current limiting, a driver and a high-current output switch capable of delivering up to 1.5 A.

Key Features

• Highly integrated: reference, comparator, oscillator, PWM controller, driver and output switch in one chip
• Topology flexibility: supports buck, boost and inverting converter configurations
• Adjustable output voltage from 1.25 V to 40 V
• Built-in protection with short-circuit current limiting
• Low standby current to improve efficiency in power-sensitive applications
• Typical efficiency of 87.7%

Specifications

• Input voltage range: 3 V to 40 V
• Typical switching frequency: 100 kHz
• Output switch current: up to 1.5 A
• Reference precision: 2%
• Package: SOIC-8
• Manufactured without antimony or brominated flame retardants (Sb/Br), designated as a green product

Applications

Designed for engineers and hobbyists developing compact power supplies, the MC34063A suits a wide range of electronic projects. Its wide input voltage range and adjustable output make it applicable to buck, boost and inverting converter designs.

Choose the Texas Instruments MC34063A Switching Regulator IC SOIC-8 when you need a compact, integrated DC-DC switching regulator with flexible converter topology support.