LM2576-5 3A Step-Down Switching Voltage Regulator 5V
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Prices updated: 12 Oct 2026
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About this product
The LM2576-5 is a fixed 5 V step-down (buck) switching regulator rated for 3 A output. It converts a higher DC input of up to 40 V into a stable 5 V with far less heat than a linear regulator, suitable for powering microcontroller boards and modules.
Specifications
- Output voltage
- 5 V (fixed)
- Output current
- 3 A
- Maximum input voltage
- 40 V
- Switching frequency
- 52 kHz
- Topology
- Step-down (buck)
Frequently asked questions
What external parts does the LM2576-5 need?
It needs an external inductor, a Schottky catch diode, and input and output capacitors as specified in the datasheet. Without the catch diode, the circuit will not operate as a buck converter.
Can it replace a 7805 regulator?
For producing 5 V from a higher input, yes, and it runs much cooler at high current. Its switching output has more noise than a linear regulator, so add filtering for sensitive analog circuits.
