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LTC3823 Datasheet Step-Down Synchronous DC/DC Controller

Manufacturer: Linear Technology (now Analog Devices)

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General Description

n Wide VIN Range: 4.5V to 36V n ±0.67%, 0.6V Reference Voltage n Output Voltage Tracking Capability n True Remote Sensing Differential Amplifier n Sense Resistor Optional n True Current Mode Control n 2% to 90% Duty Cycle at 200kHz n tON(MIN) < 100ns n Phase-Locked Loop Frequency Synchronization n Powerful Dual N-Channel MOSFET Driver n Adjustable Cycle-by-Cycle Current Limit n Adjustable Switching Frequency n Programmable Soft-Start n Current Foldback Protection (Disabled at Start-Up) n Output Overvoltage Protection n Micropower Shutdown: 30μA n Power Good Output Voltage Monitor Tracks the Reference Input Pin n Available in (5mm × 5mm) 32-Lead QFN and 28-Lead SSOP Narrow Packages APPLICATIONS n Distributed Power Systems n Server Power Supplies The LTC®3823 is a synchronous step-down switching regulator controller with true remote differential output sensing and output voltage up/down tracking capability.

Its advanced functions and high accuracy reference are ideal for powering high performance server, ASIC and computer memory systems.

The LTC3823 uses a constant on-time, valley current mode control architecture to deliver very low duty factors without requiring a sense resistor.

Overview

LTC3823 Fast No RSENSETM Step-Down Synchronous DC/DC Controller with Differential Output Sensing, Tracking and.

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