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Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense
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LTC3855
Dual, Multiphase
Synchronous DC/DC Controller
with Differential Remote Sense
Features Description Dual, 180° Phased Controllers Reduce Required
Input Capacitance and Power Supply Induced Noise
n High Efficiency: Up to 95%
n R
SENSE or DCR Current Sensing
n Programmable DCR Temperature Compensatio ±0.75% 0.6V Output Voltage Accuracy
n Phase-Lockable Fixed Frequency 250kHz to 770kHz
n True Remote Sensing Differential Amplifier
n Dual N-Channel MOSFET Synchronous Drive
n Wide V Range: 4.5V to 38V
IN
n V
OUT Range: 0.6V to 12.5V without Differential Amplifier
n V
OUT Range: 0.6V to 3.3V with Differential Amplifier
n Clock Input and Output for Up to 12-Phase Operatio Adjustable Soft-Start or V
OUT Tracking
n Foldback Output Current Limiting
n Output Overvoltage Protectio 40-Pin (6mm × 6mm) QFN and 38-Lead FE Packages The LTC®3855 is a dual PolyPhase® current mode synchronous step-down switching regulator controller that drives …