MC34063 DC-DC Converter Control IC
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Prices updated: 12 Oct 2026
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About this product
MC34063 is a control IC for DC-DC switching converters, supporting step-up, step-down and voltage-inverting topologies with an internal 1.5 A peak switch. With an external inductor, diode and capacitors, it builds low-cost boost, buck and inverting regulators for battery-powered and embedded projects.
Specifications
- Topologies
- Step-up, step-down, voltage-inverting
- Input voltage
- 3 V to 40 V
- Internal switch peak current
- 1.5 A
- Reference voltage
- 1.25 V
- Package
- DIP-8 / SOIC-8
Frequently asked questions
How do I set the output voltage?
Use a resistor divider from the output to the comparator input (pin 5) and ground. The output voltage is Vout = 1.25 × (1 + R2/R1), where R2 is between Vout and pin 5 and R1 is between pin 5 and ground.
Which external parts does it need?
A switching inductor, a fast catch diode, an output capacitor, a timing capacitor and current-sense resistor are needed for a typical buck, boost or inverting converter. Component values depend on the topology and are given in the datasheet.
