The LM2670 is a high efficiency 3A step-down voltage regulator from TI. It adopts SIMPLE SWITCHER® architecture, integrates high efficiency DMOS power switch and control circuit, and can provide 3.3V, 5V and 12V fixed output voltage with maximum output current of 3A and up to 94% conversion efficiency.
The LM2670 series provides a monolithic step‑down (buck) switching regulator capable of delivering up to 3 A with high line and load regulation. It features a low‑ON‑resistance DMOS power switch, internal 260 kHz oscillator or an external sync clock (280‑400 kHz), and built‑in thermal shutdown, current limiting, and an ON/OFF control input for low‑standby power.
Typical applications include efficient system pre‑regulators, battery chargers, and communications equipment that require synchronized clock frequencies. The device offers fixed output versions of 3.3 V, 5 V, and 12 V as well as an adjustable version (1.2 V‑37 V).
| Fixed output voltages | 3.3 V, 5 V, 12 V |
|---|---|
| Maximum efficiency | up to 94 % |
| Input voltage range | 8 V to 40 V |
| Output current capability | up to 3 A |
| Internal oscillator frequency | 260 kHz |
| External sync clock range | 280 kHz to 400 kHz |
The LM2670 can achieve up to 94 % efficiency.
It operates with an input voltage from 8 V to 40 V.
Three fixed outputs are offered: 3.3 V, 5 V, and 12 V.
Yes, an external sync clock of 280 kHz to 400 kHz can be applied.