DC2234A

DC2234A demonstration circuit is a synchronous sepic converter featuring the LT®8711 multitopology switching controller. The LT8711 is a current mode PWM DC/DC controller with a dual input LDO to optimize gate driver efficiency. Ultralow 15μA quiescent current in low noise Burst Mode® operation achieves high efficiency at very light loads and helps extend the run-time in battery powered applications when in standby mode. The LT8711 switching frequency can be programmed either via oscillator resistor or external clock over a 100KHz to 750KHz range. The demo board regulates a 12V, 4A output from a 4.5V to 40V input source, and operates at 200KHz switching frequency. The rated maximum load current is 4A, while derating is necessary for certain input voltage and thermal conditions.

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