The LM2575 is a switch mode power supply IC introduced by Semiconductor Components Industries LLC (SCILLC) in 2005. The chip can achieve a 1.0A output current and the output voltage can be adjusted. The input voltage range is 4.5V-36V.
The LM2575 series are monolithic step‑down switching regulators capable of delivering up to 1 A load current. The device offers a wide input voltage range, high efficiency, and built‑in protection features such as thermal shutdown and current limiting. It requires only four external components and is compatible with standard inductors.
The document provides electrical characteristics, absolute maximum ratings, pin descriptions, PCB layout recommendations, and ordering information. Application examples include simple buck converters, pre‑regulators for linear regulators, on‑card switching supplies, and power supplies for battery chargers.
| Input Voltage Range | 4.75 V to 40 V |
|---|---|
| Maximum Output Current | 1.0 A |
| Fixed Oscillator Frequency | 52 kHz |
| Maximum Supply Voltage | 45 V |
| Thermal Resistance (J‑A) | 65 °C |
The LM2575 operates with an input voltage from 4.75 V up to 40 V.
It can deliver a guaranteed output current of 1.0 A.
Only four external components are needed to build a functional regulator.
The device uses a fixed 52 kHz internal oscillator.