US 12,445,053 B2
Switching regulator and power management integrated circuit including the same
Hyun Seok Nam, Suwon-si (KR); and Jeong Woon Kong, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jun. 9, 2023, as Appl. No. 18/332,454.
Claims priority of application No. 10-2022-0114267 (KR), filed on Sep. 8, 2022; and application No. 10-2022-0142735 (KR), filed on Oct. 31, 2022.
Prior Publication US 2024/0088788 A1, Mar. 14, 2024
Int. Cl. H02M 3/158 (2006.01); H02H 1/00 (2006.01); H02H 7/12 (2006.01); H02M 1/088 (2006.01)
CPC H02M 3/158 (2013.01) [H02H 1/0007 (2013.01); H02H 7/1213 (2013.01); H02M 1/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A switching regulator comprising:
a switching controller configured to activate a switching conversion operation based on an enable signal;
a gate driver configured to generate a first gate signal and a second gate signal under control of the switching controller; and
a switching circuit configured to convert an input voltage applied to an input voltage node to an output voltage, the switching circuit including
a P-type transistor connected between the input voltage node and a switching node and gated based on the first gate signal,
an N-type transistor connected between the switching node and a power ground terminal and gated based on the second gate signal, and
an inductor connected between the switching node and an output node and configured to output the output voltage,
wherein in response to a protective operation event occurring in the switching regulator, the switching controller is configured to
detect a direction of a current of the inductor,
stop a switching operation of the switching circuit,
discharge a residual current of the inductor, and
entirely turn off the switching regulator.