LTC3861-1

LTC3861-1 Features Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing Description n Operates with Power Blocks, DrMOS or External Gate Drivers and MOSFETs n Constant-Frequency Voltage Mode Control with Accurate Current Sharing n ±0.75% 0.6V Voltage Reference n Differential Remote Output Voltage Sense Amplifier n Multiphase Capability—Up to 12-Phase Operation n Programmable Current Limit n Safely Powers a Prebiased Load n Programmable or PLL-Synchronizable Switching Frequency Up to 2.25MHz n Lossless Current Sensing Using Inductor DCR or Precision Current Sensing with Sense Resistor n VCC Range: 3V to 5.5V n VIN Range: 3V to 24V n Power Good Output Voltage Monitor n Output Voltage Tracking Capability n Programmable Soft-Start n Available in a 32-Pin 5mm × 5mm QFN Package Applications n High Current Distributed Power Systems n DSP, FPGA and ASIC Supplies n Datacom and Telecom Systems n Industrial Power Supplies The LTC®3861-1 is a dual PolyPhase® synchronous stepdown switching regulator controller for high current distributed power systems, digital signal processors, and other telecom and industrial DC/DC power supplies. It uses a constant-frequency voltage mode architecture combined with very low offset, high bandwidth error amplifiers and a remote output sense differential amplifier for excellent transient response and output regulation. The controller incorporates lossless inductor DCR current sensing to maintain cur...