公开(公告)号：US10073478B1

公开(公告)日：2018-09-11

申请号：US15727779

申请日：2017-10-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vadim Valerievich Ivanov ,  Srinivas K. Pulijala ,  Siva Kumar Sudani

IPC: G05F1/56 ,  G05F1/595 ,  H02M3/07 ,  G05F1/575

CPC classification number: G05F1/595 ,  G05F1/575 ,  H02M3/07

Abstract: A voltage regulator includes a first transistor including a first terminal to receive an input voltage and a second transistor including a first terminal coupled to a second terminal of the first transistor. A charge pump couples to the second transistor and to an output voltage node. An amplifier receives a feedback voltage derived from the output voltage and generates a control signal to gates of the transistors. Responsive to the input voltage being more than a threshold larger than the output voltage, the amplifier maintains the second transistor off and the first transistor on such that current flows through the first transistor to the output voltage node but not the second transistor. Responsive to the input voltage being less than the threshold amount, the amplifier operates the first transistor in a triode mode and turns on the second transistor to provide current to the charge pump.

公开(公告)号：US20190107857A1

公开(公告)日：2019-04-11

申请号：US16058022

申请日：2018-08-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vadim Valerievich Ivanov ,  Srinivas K. Pulijala ,  Siva Kumar Sudani

IPC: G05F1/595 ,  G05F1/575 ,  H02M3/07

Abstract: A voltage regulator includes a first transistor including a first terminal to receive an input voltage and a second transistor including a first terminal coupled to a second terminal of the first transistor. A charge pump couples to the second transistor and to an output voltage node. An amplifier receives a feedback voltage derived from the output voltage and generates a control signal to gates of the transistors. Responsive to the input voltage being more than a threshold larger than the output voltage, the amplifier maintains the second transistor off and the first transistor on such that current flows through the first transistor to the output voltage node but not the second transistor. Responsive to the input voltage being less than the threshold amount, the amplifier operates the first transistor in a triode mode and turns on the second transistor to provide current to the charge pump.