Invention Grant
- Patent Title: LDO with improved stability
- Patent Title (中): LDO具有改善的稳定性
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Application No.: US13066598Application Date: 2011-04-19
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Publication No.: US08912772B2Publication Date: 2014-12-16
- Inventor: Mark Childs
- Applicant: Mark Childs
- Applicant Address: DE Kirchheim/Teck-Nabern
- Assignee: Dialog Semiconductor GmbH
- Current Assignee: Dialog Semiconductor GmbH
- Current Assignee Address: DE Kirchheim/Teck-Nabern
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Priority: EP11368014 20110413
- Main IPC: G05F1/59
- IPC: G05F1/59 ; G05F1/575 ; G05F3/26

Abstract:
A low drop-out (LDO) voltage regulator which parallels a second pass device to a first pass device, where the second pass device has in series a small resistor. The small value resistor is a substitute for bond wires or capacitors with very low equivalent series resistances (ESR). A fast feedback loop is coupled to the junction of the second pass device and the small resistor and provides, via a Miller capacitor, a feedback signal to the amplifier of the voltage regulator. The added second pass device returns circuit stability by moving the fast-loop high frequency zero node back within the bandwidth of the circuit.
Public/Granted literature
- US20120262135A1 LDO with improved stability Public/Granted day:2012-10-18
Information query
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