US 12,301,116 B2
Voltage regulator with dynamic voltage and frequency tracking
Nien-Hui Kung, San Jose, CA (US); and Chia-Hua Chou, Hsinchu (TW)
Assigned to MEDIATEK SINGAPORE PTE. LTD., Singapore (SG)
Filed by MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed on Nov. 21, 2022, as Appl. No. 18/057,311.
Claims priority of provisional application 63/343,581, filed on May 19, 2022.
Claims priority of provisional application 63/300,078, filed on Jan. 17, 2022.
Prior Publication US 2023/0231482 A1, Jul. 20, 2023
Int. Cl. H02M 3/335 (2006.01)
CPC H02M 3/33507 (2013.01) 14 Claims
OG exemplary drawing
 
1. A voltage regulator with dynamic voltage and frequency tracking, comprising:
power switches for voltage regulation, converting an input voltage into an output voltage;
a control loop, coupled to the power switches to control the power switches to perform voltage regulation;
a voltage comparator, comparing the output voltage to a target voltage to generate a first control signal to control the control loop; and
a target voltage generator, generating the target voltage for the voltage comparator based on a frequency difference between a target frequency and a critical-path-related frequency;
wherein:
the critical-path-related frequency depends on the output voltage;
when the critical-path-related frequency is lower than the target frequency, the target voltage generator increases the target voltage to increase the critical-path-related frequency; and
when the critical-path-related frequency is higher than the target frequency, the target voltage generator decreases the target voltage to decrease the critical-path-related frequency.