公开(公告)号：US10444780B1

公开(公告)日：2019-10-15

申请号：US16136305

申请日：2018-09-20

Applicant: QUALCOMM Incorporated

Inventor： Yueh Chun Cheng ,  Hung-Min Cheng ,  Chien-Chih Lin

IPC: G05F1/575 ,  H03F3/45

Abstract: Regulation/Bypass automation for a low drop-out regulator (LDO) with multiple supply voltages is disclosed. In some implementations, a LDO includes a resistor, a pass transistor having a source, a gate, and a drain to output a voltage Vout, the source coupled to a supply voltage, the gate coupled to an output of an operational transconductance amplifier (OTA), and the drain coupled to a first terminal of the resistor; a feedback switch having a drain, a gate, and a source, the drain coupled to a second terminal of the resistor, the source coupled to a negative input of the OTA; and an pull-down transistor having a drain, a gate, and a source, the source coupled to ground, and the drain coupled to the negative input of the OTA, wherein the gate of the pull-down transistor and the gate of the feedback switch are configured to receive a bypass signal.