Glossary

Idle Mode

Definition

A method for improving the efficiency of switching regulators by skipping pulses when the circuit is lightly loaded.

This variation in PWM (pulse-width modulation) combines the efficiency at low loads afforded by PFM (Pulse-Frequency Modulation) with PWM's efficiency and low-noise characteristics at higher loads. At light loads the circuit skips pulses as necessary (acting like a PFM circuit). At higher loads it acts like PWM. The net result is the maximum efficiency over the widest possible load range.

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Power Systems Design

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