This document describes the features and characteristics of the LTC3856 single-output 2-phase synchronous buck controller, including light load stage shedding mode, active voltage positioning, low RSENSE, and remote VOUT sensing.
The document introduces the LTC3856 single-output 2-phase synchronous buck controller designed for efficient power conversion in computer, datacom, and telecom systems. Key features include inductor DCR sensing that compensates for temperature changes to eliminate dedicated sense resistors, and Stage Shedding mode which shuts down one channel at light loads to improve efficiency.
The datasheet details the device's ability to convert input voltages from 4.5V to 38V into outputs between 0.6V and 5V. It highlights performance metrics such as fast transient response via Active Voltage Positioning (AVP), remote output voltage sensing for high current applications, and the capability to synchronize with external frequencies up to 770kHz.
The device can convert a wide input voltage range from 4.5V to 38V.
At 5% load, the efficiency is improved by 13%.
The chip is available in 32-pin 5mm x 5mm QFN and 38-pin TSSOP packages.