DC2786A

DC2786A demonstration circuit is a single output nonisolated synchronous step-down converter that drives an all N-channel MOSFET power stage. It features the LTC®7800, a low quiescent current high frequency (programmable fixed frequency from 320KHz up to 2.25MHz) synchronous step-down DC/DC controller housed in a small 3mm x 4mm QFN package. This DC2786A operates over an input voltage range from 8V to 40V, while the LTC®7800 can operate up to 60V. This demo board produces a 3.3V output voltage with up to 10A output current, and is configured with a sense resistor for current sensing. A mode selector allows the DC2786A to operate in forced continuous operation, pulse-skipping or Burst Mode® operation during light loads. The LTC7800 features two integrated 5V gate drivers with 20ns deadtime which is good for GaN transistors or logic level MOSFETs to maximize efficiency.

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