公开(公告)号：US20170045901A1

公开(公告)日：2017-02-16

申请号：US14827239

申请日：2015-08-14

Applicant: QUALCOMM Incorporated

Inventor： Burt Lee PRICE ,  Dhaval Rajeshbhai SHAH ,  Jonathan LIU

IPC: G05F1/575

CPC classification number: G05F1/56 ,  G05F1/565 ,  G05F1/575

Abstract: Systems and methods relate to extending life of a low-dropout (LDO) voltage regulator. A differential amplifier of the LDO voltage regulator includes switches that can be selectively turned on or off. When the LDO voltage regulator is bypassed or turned off (or not active), a first switch is turned on to selectively couple gates of a first input transistor and a second input transistor of the differential amplifier, to maintain the gates at a same voltage. The first switch is turned off to decouple the gates when the LDO voltage regulator is active. Further, a second switch can be turned on or off to selectively couple or decouple, respectively, the gate of the second input transistor to an output voltage of the LDO voltage regulator, based on whether the LDO voltage regulator is active or not active, respectively.

Abstract translation: 系统和方法涉及延长低压差（LDO）稳压器的寿命。 LDO稳压器的差分放大器包括可以选择性地打开或关闭的开关。 当LDO电压调节器旁路或关断（或未激活）时，第一开关导通以选择性地耦合差分放大器的第一输入晶体管和第二输入晶体管的栅极，以将栅极保持在相同的电压。 当LDO稳压器有效时，第一个开关被关闭以去耦栅极。 此外，可以基于LDO电压调节器是有效还是不工作，分别将第二输入晶体管的栅极选择性地耦合或去耦合到LDO稳压器的输出电压，第二开关可以导通或截止 。