US 12,140,985 B2
Low dropout regulator
Shahbaz Abbasi, Hsinchu County (TW)
Assigned to KEY ASIC INC., Hsinchu County (TW)
Filed by Key ASIC Inc., Hsinchu County (TW)
Filed on Jun. 20, 2022, as Appl. No. 17/844,092.
Prior Publication US 2023/0409062 A1, Dec. 21, 2023
Int. Cl. G05F 1/575 (2006.01); G05F 1/618 (2006.01)
CPC G05F 1/575 (2013.01) [G05F 1/618 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A low dropout regulator, comprising:
a gain-stage module, configured to generate a gain-stage signal;
an output setting stage, electrically connected to the gain stage module, configured to output a load current to an output terminal in response to the gain-stage signal; and
a detection circuit, electrically connected to the gain stage module and the output setting stage, comprising:
a monitor circuit, electrically connected to the output terminal, configured to compare a charge-up duration of an output voltage signal at the output terminal with a pre-defined threshold duration and generate a comparison signal accordingly; and
a compensation circuit, electrically connected to the gain-stage module and the output terminal, configured to selectively perform frequency compensation in response to the comparison signal.