LTC3375 Buck Regulators


Linear Technology's 8-channel configurable 1 A buck DC/DCs for multi-rail systems

Linear Technology's LTC3375, is a highly-integrated general-purpose power management solution for systems requiring multiple low voltage power supplies. The device features eight independent 1 A channels with I²C control, flexible sequencing and fault monitoring in a compact QFN package. The LTC3375 contains eight internally compensated, high efficiency synchronous step-down regulators plus a high voltage always-ON 25 mA LDO controller. Each buck regulator has its own independent 2.25 V to 5.5 V input supply and an output voltage range of 0.425 V to VIN. The device’s pushbutton ON/OFF/RESET control, power-on reset and watchdog timer provide flexible and reliable power-up sequencing and system monitoring. The LTC3375 features a programmable and synchronizable 1 MHz to 3 MHz oscillator with a 2 MHz default switching frequency. Quiescent current is only 11 μA with all DC/DCs off, saving battery run time. It is ideal for a wide variety of multichannel applications including industrial, automotive and communications systems.

Features
  • 8-channel independent step-down DC/DCs master-slave configurable for up to 4 A per output rail with a single inductor
  • Independent VIN supply for each DC/DC (2.25 V to 5.5 V)
  • All DC/DCs have 0.425 V to VIN output voltage range
  • Precision enable pin thresholds for autonomous sequencing (or I²C control)
  • 1 MHz to 3 MHz programmable/synchronizable oscillator frequency (2 MHz default)
  • I²C selectable phasing (90° steps) per channel
  • Programmable power-on reset/watchdog/pushbutton timing
  • Die temperature monitor output
  • 48-lead 7 mm × 7 mm QFN package

LTC3375 Programmable 1A Buck DC/DC Converter Overview

LTC3375 Buck Regulator

Manufacturer Part Number Description Available Quantity Datasheets
LTC3375EUK#PBF IC REG BUCK ADJ 1A 48QFN 123
LTC3375HUK#PBF IC REG BUCK ADJ 1A 48QFN 16
LTC3375IUK#PBF IC REG BUCK ADJ 1A 48QFN 659