DC1198B-A

LINEAR TECHNOLOGY  DC1198B-A  演示板, LTM4605 降压-升压控制器

demonstration circuit for the LTM4605EV, the high efficiency, high density switch mode buck boost uModule regulator. Included in the package are the switching controller, power FETs, and support components. Operating over an input voltage range of 4.5V to 20V, the LTM4605 supports an output voltage range of 0.8V to 16V, set by a resistor. This high efficiency design delivers up to 5A continuous current in boost mode 12A in buck mode. Only the inductor, sense resistor, bulk input and output capacitors are needed to finish the design. The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation. The high switching frequency and current mode architecture enable a very fast transient response to line and load changes. The LTM4605 can be frequency synchronized with an external clock to reduce undesirable frequency harmonics.

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Single inductor architecture allows Vin above, below or equal to Vout

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5A DC typical 12A DC typical at buck mode

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High efficiency up to 98%

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Current mode control

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Power good output signal

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Phase lockable fixed frequency of 200KHz to 400KHz

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Ultrafast transient response

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Current foldback protection

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Output overvoltage protection