US 11,860,658 B2
Regulating circuit including a plurality of low drop out regulators and method of operating the same
Ikhwan Kim, Hwaseong-si (KR); Takahiro Nomiyama, Suwon-si (KR); Jiseon Paek, Suwon-si (KR); and Jaeyeol Han, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Nov. 8, 2021, as Appl. No. 17/521,187.
Application 17/521,187 is a continuation of application No. 16/582,401, filed on Sep. 25, 2019, granted, now 11,190,102.
Claims priority of application No. 10-2019-0037306 (KR), filed on Mar. 29, 2019.
Prior Publication US 2022/0060114 A1, Feb. 24, 2022
Int. Cl. G05F 1/565 (2006.01); H02M 3/158 (2006.01); H02M 3/00 (2006.01); H02M 1/00 (2006.01)
CPC G05F 1/565 (2013.01) [H02M 3/00 (2013.01); H02M 3/1584 (2013.01); H02M 1/0045 (2021.05)] 16 Claims
OG exemplary drawing
 
1. A regulating circuit comprising:
a first direct current-direct current (DC-DC) converter configured to generate a first supply voltage, apply the first supply voltage to a first node in a first mode via a first switch, and apply the first supply voltage to a second node in a second mode via a second switch;
a second DC-DC converter configured to provide a second supply voltage to the second node in the first mode via a fourth switch and provide the second supply voltage to a third node in the second mode via a fifth switch;
a first low drop output (LDO) regulator connected to the first node and is configured to receive the first supply voltage from the first DC-DC converter via the first switch, the first LDO regulator configured to provide an output voltage to an output node by regulating the first supply voltage; and
a second LDO regulator connected to the first node, the second LDO regulator configured to provide an auxiliary current to the first node when the first DC-DC converter does not apply the first supply voltage to the first node via the first switch and supplies the first supply voltage to the second node via the second switch.