LM2597/LM2597HV SIMPLE SWITCHER® Power Converter 150 kHz 0.5A Step-Down Voltage Regulator is a switching power supply IC with adjustable output voltage and can be equipped with different external components.
The LM2597/LM2597HV Simple Switcher series provides a monolithic step‑down (buck) regulator capable of delivering up to 0.5 A with a fixed 150 kHz switching frequency. Available in fixed 3.3 V, 5 V, 12 V outputs and an adjustable version (1.2 V‑37 V, 57 V for HV), the devices are offered in 8‑lead DIP and surface‑mount packages.
Key features include internal frequency compensation, shutdown/soft‑start control, an out‑of‑regulation error flag, thermal shutdown, and two‑stage current limiting. The datasheet also lists electrical characteristics, typical performance curves, physical dimensions and ordering numbers.
| Switching frequency | 150 kHz |
|---|---|
| Maximum output current | 0.5 A |
| Input voltage range (HV version) | up to 60 V |
| Fixed output voltages | 3.3 V, 5 V, 12 V |
| Adjustable output range | 1.2 V‑37 V (57 V for HV) |
| Efficiency (typical) | up to 88 % |
| Protection features | Thermal shutdown and two‑stage current limit |
| Package types | 8‑lead DIP and 8‑lead surface‑mount |
The device uses a fixed 150 kHz internal oscillator.
The LM2597HV can operate with an input voltage up to 60 V.
It guarantees a continuous output current of 0.5 A.