LTC3807EUDC#PBF

LINEAR TECHNOLOGY LTC3807EUDC#PBF DC-DC Controller, High Performance, 4V to 38V, 1 Output, Synchronous Buck, 900kHz, QFN-20

The is a high-performance step-down switching regulator DC/DC Controller that drives an all N-channel synchronous power MOSFET stage. The constant frequency current-mode architecture allows a phase-lockable frequency of up to 750kHz. The 50µA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3807 features a precision 0.8V reference and power good output indicator. A wide 4 to 38V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. The output voltage of the LTC3807 can be programmed between 0.8V to 24V. The TRACK/SS pin ramps the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The PLLIN/MODE pin selects among burst mode operation, pulse-skipping mode, or continuous conduction mode at light loads.

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50µA Low operating

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Selectable continuous, pulse-skipping or low ripple burst mode operation at light load

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Selectable current limit

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99% Duty cycle very low dropout operation

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Adjustable output voltage soft-start or tracking

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Power good output voltage monitor

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Output overvoltage protection

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14µA Low shutdown

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Internal LDO powers gate drive from VIN or EXTVCC

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No current fold back during start-up