发明申请
US20100201336A1 Voltage mode switching regulator and control circuit and method therefor
有权
电压模式开关稳压器及其控制电路及其方法
- 专利标题: Voltage mode switching regulator and control circuit and method therefor
- 专利标题(中): 电压模式开关稳压器及其控制电路及其方法
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申请号: US12658549申请日: 2010-02-05
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公开(公告)号: US20100201336A1公开(公告)日: 2010-08-12
- 发明人: An-Tung Chen , Jo-Yu Wang
- 申请人: An-Tung Chen , Jo-Yu Wang
- 专利权人: Richtek Technology Corporation
- 当前专利权人: Richtek Technology Corporation
- 优先权: TW098118191 20090206
- 主分类号: G05F1/10
- IPC分类号: G05F1/10
摘要:
The present invention discloses a voltage mode switching regulator with improved light load efficiency and mode transition characteristic, and a control circuit and a control method therefor. The switching regulator can switch between a pulse width modulation (PWM) mode and a pulse skipping mode. The control method for the switching regulator comprises: comparing a feedback signal relating to an output voltage with a reference signal, to generate an error amplification signal; generating a duty signal according to the error amplification signal and a ramp signal, to control the switching regulator; setting a threshold level of the error amplification signal and a threshold level of the pulse skipping mode according to the error amplification signal in a stable status; and when the error amplification signal is close or equal to the threshold level of the pulse skipping mode, generating a pulse skip signal to enter the pulse skipping mode.