ANALOG DEVICES DC2354A Demonstration Board, LTC7149EFE28#PBF, Synchronous Buck Regulator

DC2354A demonstration circuit is a high input voltage, high efficiency synchronous monolithic step-down converter with negative output featuring the LTC7149. The DC2354A has a wide I/P voltage range from 3.5V up to 55V. The O/P voltage of the DC2354A can be set as to -3.3V or -5V and �User Select� option of DC2354A allows O/P voltage to be in a range from 0V to -60V. However voltage difference between user-selected negative O/P voltage and maximum I/P voltage, should not exceed 60V. -VOUT + VIN <lt/> 60V. DC2354A is capable of delivering up to 4A of O/P current, nevertheless at lower input voltage load current should be reduced in accordance to enclosed derating curves. DC2354A supports three operation modes: Fixed-frequency modulation, Burst Mode� operation and user can synchronize it with external clock also. Fixed-frequency mode of operation maximizes the output current, reduces output voltage ripple and burst mode operation employs a variable frequency switching algorithm.

Notes

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