LM22673 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Limit
The LM22673 series is a monolithic integrated step‑down (buck) regulator capable of driving up to 3 A loads. It features a wide 4.5 V‑to‑42 V input range, high efficiency (>90 %), and a fixed‑frequency 500 kHz oscillator. Two versions are offered: a fixed 5 V output and an adjustable version that can be set as low as 1.285 V.
Key functions include adjustable soft‑start, programmable current limit, built‑in thermal shutdown, and internal voltage‑mode control that eliminates the need for external compensation components. The device is available in TO‑263 THIN and PSOP‑8 packages with exposed pads for improved thermal dissipation, and it is suited for industrial control, telecom, embedded, and automotive applications.
| Input voltage range | 4.5 V to 42 V |
|---|---|
| Maximum output current | 3 A |
| Switching frequency | 500 kHz |
| Efficiency | >90 % |
| Feedback reference accuracy | ±1.5 % |
| Soft‑start | Adjustable |
| Current limit | Adjustable |
| Thermal shutdown | Built‑in |
| Package types | TO‑263 THIN, PSOP‑8 |
The LM22673 operates from 4.5 V up to 42 V input.
It can drive loads of up to 3 A.
The regulator uses a fixed 500 kHz switching frequency.
Yes, it has built‑in thermal shutdown.