STMicroelectronics

MC34063ACD

MC34063ACD Description

The MC34063ACD from STMicroelectronics is a versatile DC-DC switching voltage regulator IC designed for buck, boost, and inverting configurations. Housed in an 8-SOIC package, it supports an adjustable output voltage ranging from 1.25V to 38V, with a wide input voltage range of 3V to 40V. Capable of delivering up to 1.5A switching current, it operates at a fixed switching frequency of 33kHz, making it suitable for moderate-power applications. Though marked as obsolete, it remains a reliable choice for legacy designs due to its robust performance and flexible topology support.

MC34063ACD Features

• Adjustable Output: Configurable for positive or negative output voltages.
• Wide Input Range: Operates from 3V to 40V, accommodating diverse power sources.
• High Switching Current: Supports 1.5A peak current for efficient power conversion.
• Buck/Boost/Inverting Capability: Versatile topology support for multiple circuit designs.
• Low External Component Count: Reduces BOM cost and PCB footprint.
• RoHS3 Compliant & REACH Unaffected: Meets environmental and regulatory standards.
• Surface-Mount Package (SOIC-8): Ideal for compact and automated assembly.

MC34063ACD Applications

• Power Supplies: Used in step-up (boost), step-down (buck), and voltage inversion circuits.
• Battery-Powered Systems: Efficiently regulates voltage in portable devices and battery chargers.
• Automotive Electronics: Suitable for 12V/24V automotive systems due to its wide input range.
• Industrial Control: Provides stable power for sensors, actuators, and control modules.
• LED Drivers: Adjustable output supports constant-current LED driving.

Conclusion of MC34063ACD

The MC34063ACD is a flexible, cost-effective solution for DC-DC conversion, offering broad compatibility and simplified design integration. While obsolete, its proven reliability and multi-topology support make it a practical choice for legacy systems, industrial, and automotive applications. Engineers seeking a balanced mix of performance and simplicity may still find value in this IC for moderate-power regulation tasks.