Invention Application
WO2011139739A2 ON-CHIP LOW VOLTAGE CAPACITOR-LESS LOW DROPOUT REGULATOR WITH Q-CONTROL
审中-公开
片上低电压电容器 - 带Q控制的低压差型稳压器
- Patent Title: ON-CHIP LOW VOLTAGE CAPACITOR-LESS LOW DROPOUT REGULATOR WITH Q-CONTROL
- Patent Title (中): 片上低电压电容器 - 带Q控制的低压差型稳压器
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Application No.: PCT/US2011/034067Application Date: 2011-04-27
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Publication No.: WO2011139739A2Publication Date: 2011-11-10
- Inventor: ZHANG, Junmou , CHUA-EOAN, Lew G.
- Applicant: QUALCOMM INCORPORATED , ZHANG, Junmou , CHUA-EOAN, Lew G.
- Applicant Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121 US
- Assignee: QUALCOMM INCORPORATED,ZHANG, Junmou,CHUA-EOAN, Lew G.
- Current Assignee: QUALCOMM INCORPORATED,ZHANG, Junmou,CHUA-EOAN, Lew G.
- Current Assignee Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121 US
- Agency: TALPALATSKY, Sam
- Priority: US13/091,715 20110421; US61/329,141 20100429
- Main IPC: G05F1/575
- IPC: G05F1/575
Abstract:
Systems and method for a capacitor-less Low Dropout (LDO) voltage regulator. An error amplifier is configured to amplify a differential between a reference voltage and a regulated LDO voltage. Without including an external capacitor in the LDO voltage regulator, a Miller amplifier is coupled to an output of the error amplifier, wherein the Miller amplifier is configured to amplify a Miller capacitance formed at an input node of the Miller amplifier. A capacitor coupled to the output of the error amplifier creates a positive feedback loop for decreasing a quality factor (Q), such that system stability is improved.
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