Patent ID: 6703815
Filing Date: 2004-03-09
Classification: G05F

Abstract:
A low drop-out regulator configured for providing output current to a load device, said low drop-out regulator comprising:an error amplifier configured to control the gain of said low drop-out regulator, said error amplifier having a positive input terminal configured for receiving a reference voltage, and a negative input terminal configured for receiving a composite feedback signal within a composite feedback loop; a current feedback amplifier having a negative input terminal coupled to an output of said error amplifier, and a positive input terminal configured for receiving a feedback signal within a local feedback loop, said local feedback loop being decoupled from said composite feedback loop of said error amplifier; and a pass device configured for driving a downstream device, said pass device comprising a power transistor configured driving a load current to the downstream device, said pass device having a control terminal coupled to an output of said current feedback amplifier, and wherein said feedback signal within said local feedback loop comprises an output signal of said pass device, said output signal of said pass device being further configured for generating said composite feedback signal.