Abstract: An electronic circuit includes a dynamic regulator connected to a load and a dc-to-dc converter to reduce a need for bulky and expensive capacitors which would otherwise be required to suppress transients. The dynamic regulator comprises one or both of a current source circuit for actively sourcing current to the load during load current demand transients, and a current sink circuit for actively sinking current from the load during load current excess transients. The dynamic regulator preferably senses the load voltage, and tracks the load voltage. The current source circuit preferably includes a current source switch, and a current source controller for operating the current source switch responsive to the load voltage falling rapidly with respect to the tracked load voltage. In a similar fashion, the current sinking circuit may include a current sink switch, and a current sink controller for operating the current source switch responsive to the load voltage rising quickly above the tracked load voltage.

Abstract: A method and circuit for modifying the clamping level (VCLAMP) of the error signal voltage (VERROR), which clamp in turn limits the peak current in the inductor of a slope-compensated, current mode DC/DC converter. VCLAMP may be modified and/or variable such that it is a function of average current in the inductor, peak current in the inductor, the converter duty cycle and/or the level of slope compensation used in the converter. The modification of VCLAMP may result in the peak current limit being independent of the converter duty cycle and/or the level of slope compensation used in the converter. Further, the modification of VCLAMP does not compromise the operational stability of the converter which is achieved by the use of a slope compensation. In addition, the clamping of the error signal before slope compensation rather than after slope compensation avoids instability at high duty cycles.