Improved transient response using high-frequency feedback control circuit of the constant current ripple constant on-time with native adaptive voltage positioning design for voltage regulators

Wen-Wei Chen; Jiann-Fuh Chen; Tsorng-Juu Liang; Sheng-Fu Hsiao; Jian-Rong Huang; Wei-Yuan Ting
November 2013
IET Power Electronics;Nov2013, Vol. 6 Issue 9, p1948
Academic Journal
Improved transient response using high-frequency feedback control (HFFC) circuit of the constant current ripple constant on-time (CCRCOT) with native adaptive voltage positioning design for voltage regulators (VRs) is proposed in this study. The concept uses the HFFC circuit to filter Vout at the load transient to change the on-time width dynamically, preventing Vout from dropping markedly. This proposal does not need an extra pin to achieve a quick response circuit. Finally, the multiphase VR with the HFFC circuit of the CCRCOT for the IC circuit of the proposed buck converter is implemented by experiment and simulation results to verify their viability and superiority.


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