Switching regulator with asymmetrical feedback amplifier and method
First Claim
1. A switching regulator network for receiving input voltage and providing a regulator output voltage including:
- a pulse width modulated switching circuit which regulates the output voltage responsive to a feedback error signal,a transconductance error amplifier for sampling the output voltage and comparing it to a reference voltage and providing said feedback error signal whereby to regulate the output voltage, said transconductance amplifier including means for providing a higher negative rate of change of feedback error signal than positive rate of change of feedback error signal.
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Accused Products
Abstract
A switching regulator network is disclosed which receives an input voltage and provides a regulated constant output supply voltage. The regulator includes a pulse width modulated switching circuit which regulates the output voltage responsive to a feedback error signal. A transconductance error amplifier produces an error feedback signal which is proportional to the difference between the reference input voltage and the output voltage. The overshoot of the output supply voltage is minimized by including a means in the transconductance error amplifier to provide a higher negative slew rate current than the positive slew rate current. This is done without employing extra pins or parts in the integrated circuit.
44 Citations
3 Claims
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1. A switching regulator network for receiving input voltage and providing a regulator output voltage including:
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a pulse width modulated switching circuit which regulates the output voltage responsive to a feedback error signal, a transconductance error amplifier for sampling the output voltage and comparing it to a reference voltage and providing said feedback error signal whereby to regulate the output voltage, said transconductance amplifier including means for providing a higher negative rate of change of feedback error signal than positive rate of change of feedback error signal. - View Dependent Claims (2, 3)
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Specification