LM22673 3A SIMPLE SWITCHER is a step-down voltage regulator with adjustable soft-start and current limit designed by National Semiconductor Corporation. It uses internal compensation voltage mode control, input voltage range is 4.5V to 42V, output voltage is adjustable, and it has over-temperature shutdown and current limiting function.
The LM22673 series provides a monolithic step‑down (buck) regulator capable of delivering up to 3 A with high efficiency (>90%). It features an internal 500 kHz oscillator, adjustable soft‑start, programmable current limit, thermal shutdown, and is available in TO‑263 THIN and PSOP‑8 packages with exposed pads for thermal dissipation.
Typical applications include industrial control, telecom and datacom systems, embedded systems, and automotive telematics. The device operates from –40 °C to 125 °C and supports a wide input voltage range of 4.5 V to 42 V, making it suitable for many power‑management designs.
| Input voltage range | 4.5 V to 42 V |
|---|---|
| Maximum output current | 3 A |
| Switching frequency | 500 kHz |
| Operating temperature range | -40 °C to 125 °C |
| Efficiency | >90 % |
| Adjustable soft‑start | Enabled via external capacitor |
The device operates with an input voltage from 4.5 V up to 42 V.
It can supply up to 3 A of output current.
The regulator uses a fixed switching frequency of 500 kHz.