Patent ID: 11906998
Assignee: APPLE INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. An electronic device comprising:
a primary low dropout voltage regulator comprising
a first current source,
an n-type transistor having a first gate coupled to the first current source and a first source coupled to an output, and
a p-type transistor having a second source coupled to the first source of the n-type transistor and a first drain coupled to a second gate of a second n-type transistor; and

a secondary low dropout voltage regulator coupled to the primary low dropout voltage regulator via a resistor coupled to an output of an operational amplifier and a second current source, the resistor and the second current source configured to control an input voltage of the secondary low dropout voltage regulator from the primary low dropout voltage regulator based on an output voltage of the operational amplifier.