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AssigneeAimtron Technology Corp.
InventorsGuang-Nan Tzeng, Yung-Chih Chen, Rong-Chin Lee
Estimating the term…
In a pulse frequency modulated (PFM) voltage regulator, a PFM switching signal is provided for converting a DC voltage source to an output voltage. The output voltage is detected. When the output voltage is lower than a predetermined target voltage, a duty cycle of the PFM switching signal is reduced. For example, a minimum OFF-time of the PFM switching signal may be prolonged or a constant ON-time of the PFM switching signal may be shortened. In other words, a period of delivering energy to a capacitor from an inductor may be prolonged or a period of storing energy in the inductor may be shortened. Therefore, a ripple of the output voltage is effectively reduced when the PFM voltage regulator is operated in a heavy loading condition.
A method of reducing a ripple of a pulse frequency modulated (PFM) voltage regulator for converting a DC voltage source to an output voltage, comprising:
A method of reducing a ripple of a pulse frequency modulated (PFM) voltage regulator including an inductive means and a capacitive means, the inductive means being coupled to a DC voltage source and the capacitive means having a terminal coupled to the inductive means and providing an output voltage, the method comprising:
A method of reducing a ripple of a pulse frequency modulated (PFM) voltage regulator including an inductive means and a capacitive means, the inductive means being coupled to a DC voltage source and the capacitive means having a terminal coupled to the inductive means and providing an output voltage, the method comprising:
Dependencies are inferred from the claim text.