Patent ID: 6366066
Filing Date: 2002-04-02
Classification: G05F,H02M,Y02B

Abstract:
A switching regulator circuit that:(1) provides a regulated voltage to an output terminal and (2) is capable of operating in a low quiescent current standby mode, the switching regulator circuit comprising: an output circuit coupled to an input terminal and said output terminal that generates a feedback signal indicative of the regulated voltage, said output circuit including a first switching element; a control circuit coupled to said output circuit that receives said feedback signal, said control circuit generating a first control signal in response to said feedback signal that controls a duty cycle of said first switching element; said control circuit comprising: an amplifier circuit responsive to a second control signal that enters a micropower operating mode when the regulator is in the standby mode so that the amount of quiescent current drawn by the regulator is reduced.