The current-limit of the boost switch is adjusted through a resistor to ground placed on the REXT pin. In order to protect the device, the REXT pin value should remain between 7.5 kΩ and 32.5 kΩ as shown in Figure 6-20. To avoid damage to both the inductor and the DRV2700 device, the programmed current-limit must be less than the rated saturation limit of the inductor selected by the user. If the combination of the programmed limit and inductor saturation is not high enough, then the output current of the boost converter is not high enough to regulate the boost output voltage under heavy load conditions. This lower output current causes the boosted rail to sag which can possibly cause distortion of the output waveform.