Chapter 220

New micropower, low dropout regulators ease battery supply designs

Mitchell Lee and John Seago


Three micropower, low dropout regulators that ease battery supply designs are described.


Linear regulator

low dropout




Three new linear regulators simplify the design of battery-operated equipment. The LT1521 is a 300mA, positive low dropout regulator with micropower quiescent current and shutdown. The LT1175 is a 500mA negative complement with adjustable current limit. A third product, the LT1118, has the unique capability of maintaining output regulation while sourcing or sinking load current.

The LT1521 contains all of the features associated with battery-operated applications. In designs ...

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