Device and method for voltage regulator with stable and fast response and low standby current

An apparatus for regulating voltage levels, the apparatus comprising:

• a first transistor and a second transistor coupled to the first transistor;
• a third transistor configured to receive a first voltage from the second transistor;
• an adaptive system coupled to the third transistor, the adaptive system associated with an effective resistance in response to a first control signal;
• wherein the first control signal is associated with either an active mode or a standby mode;
• wherein the effective resistance is equal to a first resistance value in response to a second control signal being associated with the active mode and the effective resistance is equal to a second resistance value in response to the second control signal being associated With the standby mode, the first resistance value being smaller than the second resistance value.

An apparatus for regulating voltage levels, the apparatus comprising:

• a first transistor and a second transistor coupled to the first transistor;
• a third transistor configured to receive a first voltage from the second transistor;
• a fourth transistor configured to receive the first voltage from the second transistor and generate an output voltage and an output current associated with the output voltage;
• a delay system coupled to the third transistor and configured to receive a sensing current from the third transistor and generate a delayed current, the delayed current associated with a predetermined time delay and substantially proportional to the output current;
• a current generation system coupled to the delay system, the first transistor, the second transistor and the fourth transistor;
• wherein the current generation system is configured to receive the delayed current from the delay system, output a first current to the first transistor and the second transistor, and output a second current to the fourth transistor;
• wherein the first current and the second current are each substantially proportional to the delayed current.