Micropower buck/boost circuits: converting three cells to 3.3V
Mitchell Lee
Abstract
This Design Note presents four circuits capable of solving the dilemma of converting three cells to 3.3V. The LT1303 and LT1372 high efficiency DC/DC converters are used in the examples given.
Keywords
LT1303
LT1372
micropower buck/boost circuits
converting three cells to 3.3V
Two combinations of cell count and output voltage are to be strictly avoided: three cells converted to 3.3V and four cells converted to 5V. These combinations are troublesome because no ordinary regulator (boost, buck or linear) can accommodate a situation where the input voltage range overlaps the desired output voltage.
This design note presents four circuits capable ...
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