Step-down charge pumps are tiny, efficient and very low noise
William Walter
Abstract
The LTC3250-1.5 switched capacitor step-down DC/DC converter, which squeezes into the tightest spaces while providing 1.5V at 250mA from a single 3.1V to 5.5V supply, is described.
Keywords
Step-down charge pump
LTC3251
LTC3250
Introduction
Inductorless charge pump DC/DC converters are popular in space-constrained applications with 10mA to 500mA load currents. Such converters are available in small packages, operate with very low quiescent current and require minimal external components. However, the downside for most charge pumps is noise. Noise that is generated at the power input can interfere with RF transmission and reception in ...
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