DUAL LOOP VOLTAGE REGULATOR BASED ON INVERTER AMPLIFIER AND VOLTAGE REGULATING METHOD THEREOF

摘要

A voltage regulator includes a pass element, a buffer, and an error amplifier. The voltage regulator further includes a fast push-pull driver that has an inverter type amplification structure, is connected between a power output and a control input of the pass element, and reduces positive and negative peaks of the power output at a speed faster than a speed of a main feedback loop.

主权项

1. A voltage regulator comprising:
a pass element having a power input connected to a voltage source, a power output connected to a load, and a control input; a buffer having an input and having an output connected to the control input of the pass element; an error amplifier forming a first feedback loop together with the pass element and the buffer and having a positive input connected to a sampled voltage of the power output of the pass element, a negative input connected to a reference voltage, and an output connected to the input of the buffer; and a fast push-pull driver connected between the power output and the control input of the pass element in an inverter type amplification structure and configured to reduce a negative peak and a positive peak of the power output due to a variation in the load at a speed faster than a voltage regulating speed of the first feedback loop.