The LM2579 is a pulse‑width‑modulated switching regulator controller that can be used in buck, boost, inverting and single‑ended transformer configurations. It offers separate inverting and non‑inverting feedback inputs with a built‑in 1.0 V reference, simplifying design and PCB layout.
The device operates from 3.5 V to 40 V supply, delivers up to 3 A output current, and supports a duty cycle of up to 90 %. An on‑board oscillator provides a frequency range from below 1 Hz to 100 kHz, and the part includes internal current‑limit and thermal shutdown features. Detailed electrical characteristics, typical performance curves, and application notes are included.
| Supply Voltage Range | 3.5 V to 40 V |
|---|---|
| Maximum Output Current | 3 A |
| Maximum Duty Cycle | 90 % |
| Power Dissipation | Internally limited |
The LM2579 can deliver up to 3 A of output current.
It operates from 3.5 V up to 40 V supply voltage.
The device’s duty cycle can be set up to 90 %.