By default, pin 19 functions as the channel B enable pin, BVR_EN. Use the MULTIFUNCTION_PIN_CONFIG command to assign pin 19 as a hardware voltage reset signal, RESET#, as needed. When pin 19 is not assigned as BVR_EN, the AVR_EN pin becomes a shared enable pin for both channels. RESET# is an active-low signal. Connect an external pull-up to this pin to make its default state high (e.g. not in reset).

Asserting the RESET# pin low during regulation causes the output voltage of both channels to slew back to their respective V_BOOT values, at the slew rate defined by VOUT_TRANSITION_RATE . While RESET# is asserted low, new output voltage targets from PMBus are ignored. Figure 7-7 describes the behavior of the RESET# pin.

Figure 7-7 RESET# behavior

The RESET# pin is not a global reset pin for the device. Asserting RESET# changes only the output voltage target of both channels. RESET# does not cause any operating state change or re-initialization.