Patent ID: 11906999
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A voltage regulator circuit, comprising:
a reference generation circuit having a reference input and a reference output, the reference input coupled to an input voltage terminal;
a first amplifier having first and second amplifier inputs and a first amplifier output, the first amplifier input coupled to the reference output, and the second amplifier input coupled to an output voltage terminal;
a second amplifier having a third amplifier input and a second amplifier output, the third amplifier input coupled to the first amplifier output;
a first transistor coupled between the input voltage terminal and the first amplifier output, and having a first control terminal;
a second transistor coupled between the input voltage terminal and the output voltage terminal, and having a second control terminal coupled to the second amplifier output;
a first offset voltage circuit having a first offset input and a first offset output, the first offset input coupled to the input voltage terminal;
a second offset voltage circuit having a second offset input and a second offset output, the second offset input coupled to the input voltage terminal;
a first comparator having first and second comparator inputs and a first comparator output, the first comparator input coupled to the first offset output, and the second comparator input coupled to the reference output;
a second comparator having third and fourth comparator inputs and a second comparator output, the third comparator input coupled to the second offset output, and the fourth comparator input coupled to the output voltage terminal;
an OR gate having first and second logic inputs and a logic output, the first logic input coupled to the first comparator output, and the second logic input coupled to the second comparator output; and
a turn-off circuit having a turn-off input and a turn-off output, the turn-off input coupled to the logic output, and the turn-off circuit configured to provide a turn-off signal at the first control terminal in response to a logic high at the turn-off input.