US 12,445,051 B2
Voltage providing circuit
Junghan Lee, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Apr. 25, 2024, as Appl. No. 18/645,373.
Claims priority of application No. 10-2024-0021117 (KR), filed on Feb. 14, 2024.
Prior Publication US 2025/0260315 A1, Aug. 14, 2025
Int. Cl. H02M 3/07 (2006.01); H03K 19/0175 (2006.01); H03K 19/20 (2006.01)
CPC H02M 3/07 (2013.01) [H02M 3/072 (2021.05); H03K 19/017509 (2013.01); H03K 19/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A voltage providing circuit comprising:
a charge pump circuit configured to perform a charge pumping operation in response to a comparison signal, and to output a charge-pumped output voltage to an output node; and
a voltage adjusting circuit configured to control a voltage of the output node by generating a drive voltage based on a reference voltage selection signal and a sink enable signal and outputting the drive voltage to the output node,
wherein
in a first time section in which the charge pump circuit is deactivated, the voltage adjusting circuit outputs the drive voltage to the output node; and
in a second time section in which the charge pump circuit is activated, the charge pump circuit performs charging and pumping of the drive voltage and controls the output voltage at a level of a first output voltage lower than a power supply voltage.