Invention Grant
US06856124B2 LDO regulator with wide output load range and fast internal loop
有权
LDO稳压器具有宽输出负载范围和快速内部环路
- Patent Title: LDO regulator with wide output load range and fast internal loop
- Patent Title (中): LDO稳压器具有宽输出负载范围和快速内部环路
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Application No.: US10191849Application Date: 2002-07-09
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Publication No.: US06856124B2Publication Date: 2005-02-15
- Inventor: David Dearn , John Stuart Malcolm , Axel Pannwitz
- Applicant: David Dearn , John Stuart Malcolm , Axel Pannwitz
- Applicant Address: DE Kirchheim/Teck-Nabern
- Assignee: Dialog Semiconductor GmbH
- Current Assignee: Dialog Semiconductor GmbH
- Current Assignee Address: DE Kirchheim/Teck-Nabern
- Agent George O. Saile; Stephen B. Ackerman
- Priority: EP02368074 20020705
- Main IPC: G05F1/575
- IPC: G05F1/575 ; G05F1/40

Abstract:
A method and a circuit to achieve a low drop-out voltage regulator with a wide output load range has been achieved. A fast loop is introduced in the circuit. The circuit is internally compensated and uses a capacitor to ensure that the internal pole is more dominant than the output pole as in standard Miller compensation. The quiescent current is set being proportional to the output load current. No explicit low power drive stage is required. The whole output range is covered by one output drive stage. By that means the total consumption of quiescent or wasted current is reduced. An excellent PSRR is achieved due to load dependent bias current.
Public/Granted literature
- US20040004468A1 LDO regulator with wide output load range and fast internal loop Public/Granted day:2004-01-08
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