The LTC3731H is a PolyPhase synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. It has features such as Burst Mode, OPTI-LOOP, and PolyPhase.
The LTC3731H is a PolyPhase® synchronous step‑down switching regulator controller that drives three external N‑channel MOSFET stages. It operates up to 140 °C junction temperature and offers features such as adjustable soft‑start, over‑voltage protection, and selectable phase output for up to 12‑phase operation.
The document provides absolute maximum ratings, electrical characteristics, pin functions, typical performance graphs, and package dimensions for the 36‑lead SSOP version. It also lists typical applications in automotive and industrial power supplies.
| Output Voltage Range | 0.6 V – 6 V |
|---|---|
| Switching Frequency per Phase | 250 kHz – 600 kHz |
| Maximum Operating Temperature | -40 °C – 140 °C |
| Package | 36‑Lead Plastic SSOP |
It supports output voltages from 0.6 V to 6 V.
The device is rated for operation from –40 °C to 140 °C.
The LTC3731H is offered in a 36‑lead plastic SSOP package.
It operates from 250 kHz up to 600 kHz per phase.