Uninterruptible 5V Supply Has Low Power Consumption

Abstract: This design idea shows how a switching regulator and linear regulator combine for an uninterruptible power supply. To make the power supply interruptible, a linear regulator supplies voltage when VIN is present or a step-up switching regulator generates 5V from the battery. The MAX666 voltage regulator and the MAX630 step-up switching regulator are featured.

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APP 40:
APPLICATION NOTE 40,AN40, AN 40, APP40, Appnote40, Appnote 40