DC1856A-B

LINEAR TECHNOLOGY DC1856A-B Evaluation Board, 1.8V Preset Synchronous Buck Regulator, PWM Mode, 1.2-2.5MHz Operation

The demonstration board features LTM4649EY DC to DC µModule regulator. The LTM4649EY is a complete 10A high efficiency switching mode step down DC to DC µModule regulator. High switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase operation, spread spectrum, output voltage tracking for supply rail sequencing. The LTM4649EY has an operating input voltage range of 4.5V to 16V and is able to provide an output current of up to 10A. The output voltage is programmable from 0.6V to 5V and can be remotely sensed with the internal differential remote sensing amplifier. Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing. External clock synchronization is also available through the CLKIN pin.

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Default operating frequency of 450KHz

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External clock synchronous frequency range from 250KHz to 780KHz

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89% efficiency

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Multiphase operation with current sharing

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Remote sense amplifier

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±1.5% total DC voltage output error

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Built in general use temperature monitor

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Selectable pulse skipping mode/burst mode operation for high efficiency at light load

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Soft start/voltage tracking

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Output overvoltage and overcurrent foldback protection