MC34063A DC-DC Buck Boost Inverting Regulator IC SOP-8
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Prices updated: 13 Oct 2026
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About this product
The MC34063A is a switching DC-DC converter IC that can be configured as a buck, boost or inverting regulator. It accepts a 3 V to 40 V input and provides up to 1.5 A switch current. It requires external components such as an inductor, a diode, a timing capacitor and resistors.
Specifications
- Input voltage
- 3 V to 40 V
- Output voltage
- 1.25 V to 40 V (adjustable)
- Switch current
- 1.5 A (max)
- Topologies
- Buck, Boost, Inverting
- Type
- Switching DC-DC regulator
- Package
- SOP-8
Frequently asked questions
How do I set the output voltage?
The output is set with an external resistor divider connected to the feedback pin, which compares against an internal reference of about 1.25 V. Calculate the resistor values for your target voltage using the datasheet formula.
How do I choose the inductor and diode?
The IC requires an external inductor and diode. Their values and current ratings depend on the topology, input and output voltage and load current. Calculate them from the datasheet before building the circuit.
