Patent Number: 6,166,528

Title: Lossless current sensing in buck converters working with low duty cycles and high clock frequencies

Abstract: A buck converter having a synchronous rectifier topology that performs current sensing at the low-side switch and employs "valley current control" to terminate a discharging phase and commence a charging phase of the converter. The buck converter is able to withstand high operating frequencies and low duty cycles to produce a low output voltage from a given high input voltage.

Inventors: Rossetti; Nazzareno (Danville, CA), Sanders; Seth (Berkeley, CA)

Assignee: Fairchild Semiconductor Corporation

International Classification: H02M 3/158 (20060101); H02M 3/04 (20060101); G05F 001/40 ()

Expiration Date: 12/26/2017