SLIS150K March 2014 – August 2019 DRV5013
After applying VCC to the DRV5013 device, ton must elapse before the OUT pin is valid. During the power-up sequence, the output is Hi-Z. A pulse as shown in Figure 13 and Figure 14 occurs at the end of ton. This pulse can allow the host processor to determine when the DRV5013 output is valid after startup. In Case 1 (Figure 13) and Case 2 (Figure 14), the output is defined assuming a constant magnetic field B > BOP and B < BRP.
If the device is powered on with the magnetic field strength BRP < B < BOP, then the device output is indeterminate and can either be Hi-Z or pulled low. During the power-up sequence, the output is held Hi-Z until ton has elapsed. At the end of ton, a pulse is given on the OUT pin to indicate that ton has elapsed. After ton, if the magnetic field changes such that BOP < B, the output is released. Case 3 (Figure 15) and Case 4 (Figure 16) show examples of this behavior.