Invention Grant
- Patent Title: LDO with output noise filter
- Patent Title (中): LDO带输出噪声滤波器
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Application No.: US11549030Application Date: 2006-10-12
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Publication No.: US07919954B1Publication Date: 2011-04-05
- Inventor: Vello Mannama , Rein Sabolotny
- Applicant: Vello Mannama , Rein Sabolotny
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Frommer Lawrence & Haug LLP
- Agent Matthew M. Gaffney
- Main IPC: G05F1/40
- IPC: G05F1/40

Abstract:
A low-drop out (LDO) regulator is provided. In one embodiment, the LDO regulator includes an error amplifier, a pass transistor, a reference voltage circuit, an output noise filter, and a voltage divider. The voltage divider provides a feedback voltage based on the output voltage. Further, the feedback voltage is provided at a feedback node. The output of the error amplifier is coupled to the pass transistor. The reference voltage circuit is coupled to a first input of the error amplifier. The output noise filter is coupled between the feedback node and the second input of the error amplifier.
Information query
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