Invention Grant
US07671575B1 Transient load response for a voltage regulator with a load current based control loop
有权
具有负载电流控制回路的稳压器的瞬态负载响应
- Patent Title: Transient load response for a voltage regulator with a load current based control loop
- Patent Title (中): 具有负载电流控制回路的稳压器的瞬态负载响应
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Application No.: US11557479Application Date: 2006-11-07
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Publication No.: US07671575B1Publication Date: 2010-03-02
- Inventor: Hidehiko Suzuki , Kenji Tomiyoshi
- Applicant: Hidehiko Suzuki , Kenji Tomiyoshi
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Darby & Darby P.C.
- Agent Matthew M. Gaffney
- Main IPC: G05F1/40
- IPC: G05F1/40

Abstract:
A circuit for improving transient response for a load coupled to a voltage regulator by employing both load current level information and the regulator's output voltage to control a loop that provides relatively faster and accurate regulation of the regulator's output voltage. The circuit includes an error amplifier that is coupled to a reference voltage and feedback resistors connected to the regulator's output voltage. This error amplifier outputs a compensation signal that is subsequently summed at a summing point with additional information regarding the amount of current flowing through the load. Then, this summed compensation signal is subsequently employed by a pulse width modulation (PWM) comparator and other components to regulate the regulator's output voltage with improved speed and accuracy. The circuit can be arranged in different topologies, including buck, boost, and buck/boost.
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