LM2576 3.0 A, 15 V, Step-Down Switching Regulator
The LM2576 series provides monolithic step‑down (buck) regulators available in fixed 3.3 V, 5 V, 12 V, 15 V and adjustable output versions. Designed for high efficiency, the devices require only four external components and can operate without a heatsink in many applications.
Typical applications include high‑efficiency power supplies, pre‑regulators for linear regulators, on‑card switching supplies, and battery‑charger power stages. The datasheet also covers layout guidelines, package dimensions, and ordering information for TO‑220, D2PAK and D2T packages.
| Output Current | 3.0 A |
|---|---|
| Input Voltage Range | Up to 45 V |
| Oscillator Frequency | 52 kHz (fixed) |
| Thermal Resistance, Junction‑to‑Ambient | 65 °C/W (TO‑220) |
| Maximum Junction Temperature | 150 °C |
| Moisture Sensitivity Level | MSL 1 |
| External Component Count | 4 |
Only four external components (inductor, catch diode, input and output capacitors) are needed.
The LM2576 uses a fixed 52 kHz internal oscillator.