US 12,348,136 B2
Apparatus and method for improving adaptive voltage positioning performance of voltage regulator by sensing output capacitor current
Chih-Chen Li, Hsinchu (TW); and Jin-Yan Syu, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Nov. 14, 2022, as Appl. No. 17/985,919.
Claims priority of provisional application 63/298,249, filed on Jan. 11, 2022.
Prior Publication US 2023/0223849 A1, Jul. 13, 2023
Int. Cl. H02M 3/157 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01)
CPC H02M 3/157 (2013.01) [H02M 1/0006 (2021.05); H02M 1/0009 (2021.05); H02M 1/0025 (2021.05); H02M 1/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A feedback circuit of a voltage regulator with adaptive voltage positioning (AVP), comprising:
a first sensing circuit, arranged to generate a first feedback signal that provides information of an inductor current of an inductor of the voltage regulator;
a second sensing circuit, arranged to generate a second feedback signal that provides information of an output voltage of the voltage regulator;
a third sensing circuit, arranged to generate a third feedback signal that provides information of a capacitor current of an output capacitor of the voltage regulator; and
a processing circuit, arranged to generate a control voltage signal according to the first feedback signal, the second feedback signal, and the third feedback signal, and output the control voltage signal to a controller circuit of the voltage regulator for regulating the output voltage of the voltage regulator, wherein the processing circuit comprises:
a combining circuit, arranged to combine the first feedback signal, the second feedback signal, and the third feedback signal to generate a feedback voltage signal; and
an error amplifier circuit, arranged to receive the feedback voltage signal and a reference voltage signal, and generate the control voltage signal according to a voltage difference between the feedback voltage signal and the reference voltage signal.