Current balancing, current sensor, and phase balancing apparatus and method for a voltage regulator

An apparatus comprising:

• a first current sensor coupled to an input power supply rail and to a high-side switch of a DC-DC converter;
• a second current sensor coupled to ground and to a low-side switch of the DC-DC converter, wherein the high-side switch is coupled in series with the low-side switch;
• an n-type transistor coupled in series with the first current sensor;
• and
• a p-type transistor coupled in series with the n-type transistor and the second current sensor.

A system comprising:

• a processor core;
• a DC-DC converter to provide a regulated power supply to the processor core, wherein the DC-DC converter comprises:
• a first current sensor coupled to an input power supply rail and to a high-side switch of a DC-DC converter;
• a second current sensor coupled to ground and to a low-side switch of the DC-DC converter, wherein the high-side switch is coupled in series with the low-side switch;
• an n-type transistor coupled in series with the first current sensor;
• and
• a p-type transistor coupled in series with the n-type transistor and the second current sensor;
• and
• an inductor coupled to the high-side and low-side switches of the DC-DC converter;
• a capacitor coupled to the inductor, wherein the inductor is coupled to the processor core;
• and
• a wireless interface to allow the processor core to communicate with another device.