Novel circuitry and methodology for determining a load current in a
switching regulator circuit operable in a pulse skipping mode of
operation and having main and synchronous switches. The load current is
determined based on a ratio of time when the synchronous switch is on in
the pulse skipping mode to an average period of a switching cycle in the
pulse skipping mode. The load current may be measured by a circuit that
determines an average value of a switch control signal for controlling
the synchronous switch. The load current determining circuit may comprise
a low-pass filter for filtering the switch control signal proportional to
an input voltage supplied to the switching regulator circuit.