Adaptive slope compensation for switching regulators

An apparatus for adjusting slope compensation in a switching regulator that includes an inductor, the apparatus comprising:

• a first current source includes a first terminal configured to provide a first current (I1) at the first terminal that is proportional to a first voltage (VREF);
• a second current source that includes a second terminal configured to provide a second current (I2) at the second terminal that is proportional to a second voltage (V1) that is proportional to a measured inductance value for the inductor;
• a first current mirror circuit that includes a third terminal and a fourth terminal, wherein the third terminal is coupled to the first terminal and the first current mirror circuit is configured such that a first reflected current is provided at the fourth terminal that is proportional to the first current (I1);
• a current divider circuit that includes a fifth terminal, a sixth terminal and a seventh terminal, wherein the fifth terminal is coupled to the fourth terminal, the sixth terminal is coupled to the second terminal and the current divider is arranged to generate a third current at the seventh terminal that is proportional to a division of the first current (I1) by the second current (I2);
• a second current mirror circuit that includes an eighth terminal and a ninth terminal, wherein the eighth terminal is coupled to the seventh terminal and the second current mirror circuit is configured such that a fourth current is provided at the ninth terminal that is proportional to the third current;
• and
• a capacitor circuit that includes a tenth terminal that is coupled to the ninth terminal, wherein the capacitor circuit is arranged to receive the fourth current as a charging current to provide a ramp signal, wherein the ramp signal has a slope (me) that is proportional to the division of the first current (I1) and the second current (I2) via the charging current such that the slope is dynamically adjusted in response to changes in the first voltage (VREF) and the second voltage (V1) that is proportional to a measured inductance value for the inductor.

An apparatus for adjusting slope compensation in a switching regulator that includes an inductor, the apparatus comprising:

• a first current source that is arranged to provide a first current (I1) that is associated with the an output voltage (VOUT) of the switching regulator;
• a second current source that is arranged to provide a second current (I2) that is related to a measured value (V1) associated with the inductor, wherein the second current source is configured such that the second current (I2) is proportional to V1·K, wherein V1 is proportional to the measured inductance value associated with the inductor and K is a proportionality constant;
• and
• a capacitor circuit that is arranged to receive a charging current to provide a ramp signal, wherein the ramp signal has a slope (me) that is related to the first and second currents via the charging current such that the slope is dynamically adjusted in response to changes in the output voltage (VOUT) of the switching regulator and the measured value (V1) associated with the inductor.