The LTC3708 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. The LTC3708 uses a constant on-time, valley current mode control architecture to deliver very low duty factors without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in input supply voltage. An internal phase-locked loop allows the IC to be synchronized to an external clock. Fault protection is provided by an output overvoltage comparator and an optional short-circuit shutdown timer. The regulator current limit level is user programmable. A wide supply range allows voltages as high as 36V to be stepped down to 0.6V output. Applications * Notebook and Palmtop Computers, PDAs * Digital Signal Processors * Network Servers * 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 * On-board 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 https://elecena.pl/product/258922/fast-2-phase-no-r-buck-controller-with-output-tracking 2007-03-04 https://elecena.pl/product/258922/fast-2-phase-no-r-buck-controller-with-output-tracking 2014-06-11 https://elecena.pl/product/258922/fast-2-phase-no-r-buck-controller-with-output-tracking 2025-01-18