US 11,789,479 B2
Low drop-out regulator and mobile device
Jungmoon Kim, Namyangju-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 2, 2022, as Appl. No. 17/684,600.
Claims priority of application No. 10-2021-0095508 (KR), filed on Jul. 21, 2021.
Prior Publication US 2023/0025117 A1, Jan. 26, 2023
Int. Cl. G05F 1/575 (2006.01); G05F 1/565 (2006.01); G09G 3/3208 (2016.01)
CPC G05F 1/575 (2013.01) [G05F 1/565 (2013.01); G09G 3/3208 (2013.01); G09G 2310/0243 (2013.01); G09G 2320/0626 (2013.01); G09G 2330/021 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A low drop-out (LDO) regulator comprising:
a power transistor configured to regulate a driving voltage based on a gate voltage of a gate node of the power transistor to provide an output voltage to a load at an output node;
an error amplifier configured to output the gate voltage by amplifying a voltage difference between a reference voltage and a feedback voltage based on the output voltage; and
a droop adjusting circuit configured to receive the output voltage provided to the load and adjust the gate voltage to compensate for a change of the output voltage based on a change of a load current provided to the load at the output node.