Patent ID: 9742280
Date: 2017-08-22
CPC Classifications: H02M

Claim:
1. Method to improve load transient response of a switched multiphase buck converter, comprising: (1) providing a switched multiphase DC-to-DC converter, comprising one or more fast phases with inductors having low inductance, one or more slow phases with inductors having higher inductance, compared to the fast phases, having relative high inductance, a circuit to detect if an output current of a slow phase has reached a maximum limit, a load step detection unit to detect if a load step at the output of the DC-to-DC converter has occurred and a frequency divider unit, which is configured to reduce a clock frequency; (2) reducing a clock frequency of said one or more fast phases upon detection of a load step; and (3) returning said clock frequency to its normal rate once a current in said one or more fast phases reaches a predetermined level.