Current mode control of a buck converter using coupled inductance

A method, comprising:

• generating a demand current using a voltage level of a power supply node included in a load circuit and a reference voltage, wherein the power supply node is coupled to a first inductor and a second inductor, and wherein the second inductor is inductively coupled to the first inductor;
• initiating a first charge cycle of the power supply node through the first inductor in response to an assertion of a first clock signal;
• generating a first compensated current using a first current measured through the first inductor, a second current measured through the second inductor, the first clock signal, and a coupling coefficient between the first inductor and the second inductor;
• and
• halting the first charge cycle in response to determining that the first compensated current is greater than the demand current.

A system, comprising:

• a plurality of circuit blocks;
• a first inductor coupled to a power supply node of a particular circuit block of the plurality of circuit blocks;
• a second inductor coupled to the power supply node of the particular circuit block, wherein the second inductor is inductively coupled to the first inductor;
• a regulator circuit configured to:
• generate a demand current using a voltage level of the power supply node and a reference voltage;
• initiate a first charge cycle of the power supply node through the first inductor in response to an assertion of a first clock signal;
• generating a first compensated current using a first current measured through the first inductor, a second current measured through the second inductor, the first clock signal, and a coupling coefficient between the first inductor and the second inductor;
• and
• halting the first charge cycle in response to determining that the first compensated current is greater than the demand current.