公开(公告)号：US09753474B2

公开(公告)日：2017-09-05

申请号：US14173742

申请日：2014-02-05

Applicant: BROADCOM CORPORATION

Inventor： Jinghua Zhang ,  Ricky Setiawan ,  Jeffrey Norwood Harrison

IPC: G05F1/56 ,  G05F1/575

CPC classification number: G05F1/575 ,  G05F1/56

Abstract: A low-power low-dropout (LDO) voltage regulator device includes an error amplifier, a level-shifter circuit, and an NMOS pass transistor. The error amplifier compares a sampled portion of a regulated output voltage of the LDO voltage regulator with a reference voltage and generates an error signal. The level-shifter circuit is coupled to the error amplifier. The NMOS pass transistor provides the regulated output voltage with low dropout operation. The level-shifter circuit can shift a voltage level of the error signal to facilitate the low dropout operation of the NMOS pass transistor.

公开(公告)号：US20150198960A1

公开(公告)日：2015-07-16

申请号：US14173742

申请日：2014-02-05

Applicant: BROADCOM CORPORATION

Inventor： Jinghua Zhang ,  Ricky Setiawan ,  Jeffrey Norwood Harrison

IPC: G05F1/575

CPC classification number: G05F1/575 ,  G05F1/56

Abstract: A low-power low-dropout (LDO) voltage regulator device includes an error amplifier, a level-shifter circuit, and an NMOS pass transistor. The error amplifier compares a sampled portion of a regulated output voltage of the LDO voltage regulator with a reference voltage and generates an error signal. The level-shifter circuit is coupled to the error amplifier. The NMOS pass transistor provides the regulated output voltage with low dropout operation. The level-shifter circuit can shift a voltage level of the error signal to facilitate the low dropout operation of the NMOS pass transistor.

Abstract translation: 低功率低压差（LDO）稳压器装置包括误差放大器，电平移位器电路和NMOS传输晶体管。 误差放大器将LDO稳压器的调节输出电压的采样部分与参考电压进行比较，并产生误差信号。 电平移位电路耦合到误差放大器。 NMOS传输晶体管提供具有低压差操作的稳压输出电压。 电平移位器电路可以移位误差信号的电压电平，以便于NMOS传输晶体管的低压差操作。