A system, method, and apparatus are arranged to provide small-signal compensation
in a switching regulator that includes an inductor. A zero adjustment circuit is
included in the system to introduce at least one zero in the closed-loop transfer
function associated with the regulator. The zero adjustment circuit is responsive
to a measurement signal, which is associated with one or more measured parameters
associated with the inductor. By changing the location of at least one zero in
response to the measurement signal it is possible to dynamically change the compensation
based on variations in the inductance of the inductor. The zero adjustment circuit
may be provided as a portion of the controller block of the regulator, or as a
separate feedback circuit. The zero adjustment circuit can be implemented digitally
as a portion of a DSP block, or as an analog function as may be desired in a particular system.