APPLICATION NOTE 40

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.