The LM2673 Simple Switcher is a monolithic integrated circuit that provides all active functions for a buck switching regulator capable of delivering up to 3 A. It features a low‑ON‑resistance DMOS power switch, a fixed 260 kHz oscillator, and resistor‑programmable current limiting.
The document includes electrical characteristics, absolute maximum ratings, ordering information for TO‑263, TO‑220 and LLP packages, typical performance graphs, application hints, and detailed component selection guides for inductors and capacitors.
| Input Voltage Range | 8 V to 40 V |
|---|---|
| Maximum Output Current | 3 A |
| Efficiency | up to 94 % |
| Switching Frequency | 260 kHz |
A capacitor on the soft‑start pin provides a gradual turn‑on, reducing input surge current when power is applied.