LTC3901 is an N-channel synchronous MOSFET driver with features such as programmable timeout, reverse inductor current sense, gate drive transformer synchronization sequence monitor, etc. It is designed for use in isolated push-pull and full-bridge converter power supplies. It provides a full range of protection features, including timeout function, inductor current reversal detection, undervoltage lockout, etc.
The LTC3901 provides a secondary‑side synchronous rectifier driver for isolated push‑pull and full‑bridge power supplies. It drives two external N‑channel MOSFETs and synchronizes with the primary side via a transformer‑generated signal. The device includes programmable timeout, reverse‑current sensing, and undervoltage lockout to protect the MOSFETs.
Typical applications include 48 V isolated DC/DC converters, telecom power supplies, industrial control power supplies, and automotive or heavy‑equipment power systems. The datasheet details electrical characteristics, pin functions, timing diagrams, and recommended layout for the 16‑lead narrow SSOP package.
| Supply Voltage Range | 4.5 V to 11 V |
|---|---|
| Rise/Fall Time | 15 ns (at Veg=5 V, CL=4700 pF) |
| Undervoltage Lockout Threshold | 4.5 V |
| Driver Peak Output Current | 2 A |
| Package Type | 16‑Lead Narrow Plastic SSOP |
The device operates from 4.5 V up to 11 V.