Patent ID: 6856124

Claim:
A circuit to achieve an low drop-out voltage regulator with a wide output load range without an explicit low power stage comprising: a slow loop comprising a differential amplifier stage, wherein the quiescent current is varied by the magnitude of the output load current, having an input and an output wherein the input is a voltage out of a voltage divider and the output is a input of a fast loop; a voltage divider hooked up between ground and the drain of an output transistor; a fast loop comprising: a capacitor, hooked up between the drain of said output transistor and the output of said amplifier stage of the slow loop; an amplifier stage having an input and an output wherein the input is the output of the said amplifying stage of said slow loop and the output is the input of an output drive stage; an output drive stage, wherein the gain of said output drive stage is varied by the magnitude of the output load current, having an input and an output wherein the input is the output of said amplifier stage and the output is the input of an output transistor and wherein said output of said output drive stage comprises a drain of a first MOS transistor and wherein said drain is further connected to a source of said first MOS transistor through a resistor; and an output transistor having an input and an output wherein the input is the output of said output drive stage and an unregulated battery voltage and the output is a load current being connected said slow loop and said fast loop.