US 11,894,768 B2
DC/DC converter
Kazutoshi Ono, Kanagawa (JP); Nobuhiko Shigyo, Kanagawa (JP); and Hideo Maeda, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/996,409
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Mar. 10, 2021, PCT No. PCT/JP2021/009449
§ 371(c)(1), (2) Date Oct. 17, 2022,
PCT Pub. No. WO2021/220629, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 2020-077926 (JP), filed on Apr. 27, 2020.
Prior Publication US 2023/0216400 A1, Jul. 6, 2023
Int. Cl. H02M 3/07 (2006.01); G05F 3/20 (2006.01)
CPC H02M 3/073 (2013.01) [G05F 3/205 (2013.01); H02M 3/072 (2021.05)] 5 Claims
OG exemplary drawing
 
1. A DC/DC converter, comprising:
a charge pump configured to generate a specific output voltage from a specific DC power supply;
a clock generator configured to output a clock for operating the charge pump;
a voltage monitoring unit configured to:
monitor the specific output voltage of the charge pump;
and
control the clock output from the clock generator such that the specific output voltage is maintained within a specific range;
compare the specific output voltage with one of a first potential or a second potential;
output a control signal that enables output of the clock when the specific output voltage goes beyond one of the first potential or the second potential:
compare the specific output voltage with the first potential when the control signal indicates invalidity of the clock;
compare the specific output voltage with the second potential when the control signal indicates validity of the clock; and
compare the specific output voltage with the second potential when a specific forced signal is input even in a case where the control signal indicates invalidity of the clock; and
a voltage regulator configured to generate a bias voltage from the specific output voltage of the charge pump.