Switching regulator

Details Switching regulator Switching regulator

2006-07-19

2009-02-17

Ullah, Akm E (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S224000, C323S282000, C323S283000, C323S284000, C323S285000, C323S288000

Reexamination Certificate

active

07492132

ABSTRACT:
The present invention provides a switching regulator having good stability compatible with a good response and an enhanced protection function. A first capacitor is placed between an output end of an inductor to generate an output voltage and a ground potential. From input voltage, a current is supplied to the inductor's input end by a first switch element. A first feedback path includes a hysteretic comparator. An output voltage added to a voltage proportional to the current flowing through the inductor is supplied to the hysteretic comparator which discriminates whether the voltage is appropriate by hysteresis characteristics and generates a PWM control signal in accordance with an output current variation. Moreover, a second feedback path is provided to feed back an error amplifier output voltage with greater gain in a low frequency domain and an attenuation loop around a PWM frequency band to the comparator's reference voltage input terminal. Feedback voltage through the second feedback path is used as a monitoring voltage in a protection circuit.

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