US 12,093,068 B2
Scalable low dropout regulator having multiple pass circuits
Michael P. Wigley, Swindon (GB); Tiago Filipe Galhoz Patrao, Swindon (GB); Mircea-Andrei Lazar, Newbury (GB); Nathan F. Hanagami, San Francisco, CA (US); Jay B. Fletcher, Saratoga, CA (US); and Enrico Zanetti, Cascina (IT)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 14, 2022, as Appl. No. 17/806,908.
Prior Publication US 2023/0400869 A1, Dec. 14, 2023
Int. Cl. G05F 1/575 (2006.01); G05F 1/46 (2006.01); G05F 1/565 (2006.01); H02M 1/00 (2006.01); H02M 3/158 (2006.01)
CPC G05F 1/575 (2013.01) [G05F 1/468 (2013.01); G05F 1/565 (2013.01); H02M 1/0009 (2021.05); H02M 3/158 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a plurality of pass circuits, wherein respective outputs of the plurality of pass circuits are coupled to a common regulated power supply node, wherein the plurality of pass circuits is configured to:
source corresponding supply currents of a plurality of supply currents to the regulated power supply node using a plurality of control signals and a voltage level of an input power supply node; and
generate a sense current indicative of a total supply current being sourced to the regulated power supply node; and
a control circuit configured to generate the plurality of control signals using a voltage level of the regulated power supply node, a reference voltage, and the sense current.