JAJSCX0C October 2015 – November 2018 DRV8885
PRODUCTION DATA.
An LDO regulator is integrated into the DRV8885. DVDD can be used to provide a reference voltage. For proper operation, bypass DVDD to GND using a ceramic capacitor.
The DVDD output is nominally 3.3 V. When the DVDD LDO current load exceeds 1 mA, the output voltage will drop significantly.
The AVDD pin also requires a bypass capacitor to GND. This LDO is for DRV8885 internal use only.
If a digital input needs to be tied permanently high (that is, Mx, DECAY or TRQ), it is preferable to tie the input to DVDD instead of an external regulator. This will save power when VM is not applied or in sleep mode: DVDD is disabled and current will not be flowing through the input pulldown resistors. For reference, logic level inputs have a typical pulldown of 100 kΩ, and tri-level inputs have a typical pulldown of 60 kΩ.