DESCRIPTION
The LTC®3708 is a dual, 2-phase synchronous step-down switching regulator with output voltage up/down tracking capability. The IC allows either coincident or ratiometric tracking. Multiple LTC3708s can be daisy-chained in applications requiring more than two voltages to be tracked. Power supply sequencing is accomplished using an external soft-start timing capacitor.

FEATURES
■ Very Low Duty Factor Operation (tON(MIN) < 85ns)
■ No RSENSE™ Option for Maximum Efficiency
■ Very Fast Transient Response
■ Programmable Output Voltage Up/Down Tracking
■ 2-Phase Operation Reduces Input Capacitance
■ 0.6V ±1% Output Voltage Reference
■ External Frequency Synchronization
■ Monotonic Soft-Start
■ Onboard High Current MOSFET Drivers
■ Wide VIN Range: Up to 36V
■ Adjustable Cycle-by-Cycle Current Limit
■ Instant Output Overvoltage Protection
■ Optional Short-Circuit Shutdown Timer
■ Power Good Output with 100μs Masking
■ Available in 5mm × 5mm QFN Package

APPLICATIONS
■ Digital Signal Processors
■ Network Servers