LTC3732 is a synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture.
The LTC3732 is a PolyPhase® synchronous step‑down switching regulator controller that drives external N‑channel MOSFETs in a 3‑phase architecture. It features onboard MOSFET drivers, 5‑Bit VID programming, and modes such as Stage Shedding and Burst Mode for optimized efficiency and thermal performance.
Typical applications include desktop and high‑performance notebook computers and high‑output‑current DC/DC power supplies. The device is offered in a 36‑lead narrow SSOP package and a 38‑lead QFN package (5 mm × 7 mm).
| Input Voltage Range | 4.5 V – 32 V |
|---|---|
| Switching Frequency per Phase | 250 kHz – 600 kHz |
| Package Options | 36‑Lead SSOP (0.209 in) and 38‑Lead QFN (5 mm × 7 mm) |
| Maximum Output Current | up to 60 A |
| Operating Ambient Temperature Range | 0 °C – 70 °C |
The LTC3732 can operate from 250 kHz up to 600 kHz per phase.
The PLLIN pin is the synchronization input to the phase detector.
It is offered in a 36‑lead narrow SSOP package and a 38‑lead QFN package (5 mm × 7 mm).