| CPC H02M 3/158 (2013.01) [H03K 5/24 (2013.01)] | 20 Claims |
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1. An apparatus, comprising:
a first power converter circuit coupled to a regulated power supply node, wherein the first power converter circuit is configured to generate a given voltage level on the regulated power supply node using a voltage level of an input power supply node and a reference voltage, wherein the voltage level of the input power supply node is positive relative to a ground reference;
a second power converter circuit that includes an inductor connected, in series via a boost node, to a capacitor, wherein the capacitor is coupled to the regulated power supply node, and wherein the second power converter circuit is configured to:
couple a terminal of the inductor to the input power supply node to source current from the input power supply node to the regulated power supply node for a first duration during which a control signal is asserted; and
pre-charge, for a second duration during which the control signal is de-asserted, the boost node to voltage level that is negative relative to the ground reference;
a load circuit coupled to the regulated power supply node, wherein the load circuit is configured to generate an activation signal in anticipation of an increase in a level of activity of the load circuit, wherein the activation signal includes information indicative of an anticipated level of activity; and
a control circuit configured to:
receive the activation signal from the load circuit; and
assert the control signal in response to a determination that the anticipated level of activity is greater than an activity threshold.
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