Variable Drive Strength Voltage Regulator for Phase Margin

The patent implements a dynamic drive strength adjustment mechanism where the pull-up network's effective channel width is modifiable based on operating conditions. The system transitions from a static over-designed pull-up network to a dynamic configuration that adapts drive strength to actual load requirements, thereby maintaining phase margin during critical transitions while reducing power consumption during steady-state operation.

The patent changes the effective channel width parameter of the pull-up network dynamically. By modifying this physical parameter based on operating conditions (such as load changes or temperature), the system optimizes the balance between phase margin maintenance and power consumption, avoiding the need for continuous over-design.

The patent segments the pull-up network into multiple parallel paths with different drive strengths. This segmentation allows the system to activate only the necessary number of pull-up transistors based on load requirements, rather than designing for the worst-case scenario from the outset. The segmented structure provides scalable load capability without proportionally increasing overall circuit complexity.

The patent applies partial action by activating only the required portion of the pull-up network capacity based on actual load demands. Instead of always engaging the full drive strength, the system uses a subset of available pull-up transistors, thereby achieving necessary load capability while avoiding the complexity overhead of continuously managing a fully activated high-capacity network.