On this slide, the R4 control loop vs. a constant on time (COT) controller from a competitor is showcased. Constant on time modulators are becoming increasingly popular control schemes in the market. In this example, both the ISL68200 and the competitor’s controller were tested with the same Vin, Vout, output inductor, and output capacitance. The constant on time controller uses an adjustable frequency modulator, but unlike R4, it cannot change duty cycle in response to load transients. The differences in transient performance is remarkable – under the same test conditions, the ISL68200 had twice the performance advantage of the constant on time controller. This performance advantage allows for significantly fewer output capacitors, resulting in smaller overall design size and cost.