DC1852A

DC1852A demonstration circuit is a combined step-up and step-down DC/DC converter, using the LTC3536 monolithic synchronous buck-boost regulator. The DC1852A has a wide input voltage range of 1.8 to 5.5V and can deliver up to 1A of output current. The output voltage of the DC1852A can be set as low as 1.8V and can go as high as 5.5V. DC1852A supports two operation modes: fixed-frequency pulse-width modulation (PWM) and Burst Mode® operation. Fixed-frequency mode of operation maximizes the output current, reduces output voltage ripple, and yields a low noise switching spectrum. Burst mode operation employs a variable frequency switching algorithm that minimizes the no-load input quiescent current and improves efficiency at light loads. The DC1852A consumes less than 28μA of quiescent current during Burst Mode operation, and during the shutdown, it consumes less than 1μA. The DC1852A has a standard operating frequency of 1MHz but can be adjusted to frequencies as high as 2MHz.

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