LM1578A/LM2578A/LM3578A Switching Regulator
The LM1578A family (including LM2578A and LM3578A) are switching regulator controllers that can be configured for buck, boost, inverting and transformer‑based topologies. They feature separate inverting and non‑inverting comparator inputs with an internal 1.0 V reference, an on‑board oscillator, and a current‑limit terminal that can be referenced to ground or V\u200bREF.
The device operates from 2 V to 40 V supply voltages, delivers up to 750 mA output current, and supports a duty cycle up to 90 %. Detailed electrical characteristics, mechanical dimensions and application notes are provided for designers.
| Supply Voltage Range | 2 V to 40 V |
|---|---|
| Maximum Output Current | 750 mA |
| Maximum Duty Cycle | 90 % |
| Output Saturation Voltage | < 0.9 V |
The device can deliver up to 750 mA of output current.
It operates from 2 V to 40 V supply voltage.
The internal oscillator limits the maximum duty cycle to 90 %.