Unlike true current-mode control, the MIC2127A uses the output voltage ripple to trigger an on-time event. This enables the MIC2127A to react very quickly to load transients, resulting in lower under and overshoot of the output voltage. The illustrations here show the frequency response, and voltage drop of the conventional current mode control architecture as compared to the MIC2127A adaptive on-time architecture during a load transient. The MIC2127A frequency response is much faster, and increases, resulting in lower voltage drop. The adaptive on-time architecture also reduces the designer’s BOM cost, since the MIC2127A does not require external compensation circuitry, and due to its fast response to load transients, a smaller amount of output capacitance can be used.