The LM22677 is a simple switch regulator that can provide 5A output with adjustable switching frequency and wide input voltage range, high efficiency and low on-resistance.
The LM22677 series is a monolithic step‑down (buck) switching regulator capable of delivering up to 5 A with high efficiency. It integrates a low‑ON‑resistance N‑channel MOSFET and provides functions such as thermal shutdown, current limiting, and a precision enable pin.
The device operates from a wide input voltage range, offers a fixed 5 V output or an adjustable version down to 1.285 V, and features a default 500 kHz switching frequency that can be adjusted between 200 kHz and 1 MHz or synchronized to an external clock.
| Input voltage range | 4.5 V to 42 V |
|---|---|
| Maximum output current | 5 A |
| Output voltage options | 5 V fixed or adjustable down to 1.285 V |
| Switching frequency (default) | 500 kHz |
| Adjustable switching frequency range | 200 kHz – 1 MHz |
| Package type | TO‑263 THIN (Exposed Pad) |
| Thermal shutdown activation temperature | 150 °C |
| Standby quiescent current (EN low) | 25 pA |
The regulator defaults to a 500 kHz switching frequency, which can be adjusted between 200 kHz and 1 MHz.
It operates from 4.5 V up to 42 V input.
The device can drive loads up to 5 A.
The regulator draws a low 25 pA standby current.