A simplified applications circuit is illustrated here along with several equations for calculating the output voltage, the soft-start rise time and the soft-stop fall time. The soft-start rise time is a function of the value of the soft-start capacitor value, and the soft-stop time is a function of the soft-start capacitor value in addition to the soft-stop resistor value. Further details on constraints for these two values are provided in the device datasheet. For example, there is a minimum permissible soft-start rise time in order to prevent an overcurrent event on startup. A table is provided outlining the values for the control loop compensation components based on the output capacitance and output voltage range. Two different options are provided in this table – one that minimizes the overall solution size and one that optimizes the load transient response. The EN29A0QI uses a Type III compensation network for optimizing control loop stability and load transient response. The internal error amplifier’s input (VFB) and output (COMP) are directly accessible allowing for direct tuning of the compensation network. A table is also provided in the data sheet for the range of values for RFREQ which sets the internal PWM switching frequency. This adjustment range allows flexibility in selecting the frequency, so that a tradeoff can be made between optimizing load transient response and efficiency. In general, higher switching frequencies will yield faster load transient response but at the expense of a slightly reduced efficiency. The key takeaway here is that Altera provides all of the necessary information and tools to make designing with the EN29A0QI quick and easy.