LM2575-5V 1A Step-Down Switching Regulator
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Prices updated: 13 Oct 2026
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About this product
The LM2575-5V is a 1 A step-down (buck) switching regulator with a fixed 5 V output from Texas Instruments. It reduces a higher DC input voltage efficiently with a small number of external parts. It is commonly used to power microcontroller boards and logic circuits from 12 V or 24 V supplies.
Specifications
- Output voltage
- 5 V fixed
- Output current
- 1 A
- Topology
- Step-down (buck)
- Input voltage
- Up to 40 V
- Switching frequency
- 52 kHz
Frequently asked questions
What external parts does it need?
It needs an external inductor, a Schottky catch diode, and input and output capacitors, with values given in the datasheet for the chosen configuration. Without them the regulator will not operate correctly.
Does it need a heatsink?
It depends on the input voltage and the load current. Dropping a higher input voltage to 5 V at 1 A dissipates noticeable heat, so check the datasheet thermal section and add a heatsink or copper area when needed.
