DESCRIPTION

The LTC®3770 is a synchronous step-down switching regulator controller with output voltage up/down tracking capability and voltage margining. Its advanced functions and high accuracy reference are ideal for powering high performance server, ASIC and computer memory systems.

FEATURES

■ Wide VIN Range: 4V to 32V
■ ±0.67% 0.6V Reference Voltage
■ Output Voltage Tracking Capability
■ Programmable Margining
■ Sense Resistor Optional
■ True Current Mode Control
■ 2% to 90% Duty Cycle at 200kHz
■ tON(MIN) ≤ 100ns
■ Phase-Locked Loop Frequency Synchronization
■ Powerful Dual N-Channel MOSFET Driver
■ Adjustable Cycle-by-Cycle Current Limit
■ Adjustable Switching Frequency
■ Programmable Soft-Start
■ Current Foldback Protection (Disabled at Start-Up)
■ Output Overvoltage Protection
■ Micropower Shutdown: IQ < 30μA
■ Power Good Output Voltage Monitor
Tracks the Reference Input Pin
■ Available in (5mm × 5mm) QFN and 28-Lead
SSOP Packages

APPLICATIONS

■ Distributed Power Systems
■ Server Power Supply