초록 ▼

A switching mode voltage regulator circuit that operates at reduced quiescent current levels is provided. The voltage regulator preferably includes a control circuit and a switching element that connects and disconnects filter circuitry from the control circuit. An error amplifier in the control cir

A switching mode voltage regulator circuit that operates at reduced quiescent current levels is provided. The voltage regulator preferably includes a control circuit and a switching element that connects and disconnects filter circuitry from the control circuit. An error amplifier in the control circuit is placed in a micropower operating state when the regulator is in standby mode to reduce quiescent current.

대표청구항 ▼

1. 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 f

1. 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.