ZX5T953 for the ADAU1701 on-board regulator
Good day,
I have seen in the evaluation board ADAU1701MINI that a 40V 3A PNP transistor (Q1) is being used for the drive of the IC’s on-board regulator. Other than, in the ADAU1701 datasheet it is stated that the maximal current flowing through the digital pins is 60mA. Is there a special reason such a big capability current transistor is being used? Could I replace without any problems with a lower current rate transistor (for example, a BC857)?
Thanks in advance!
Martin
Audio Signal Processors
SigmaDSP Audio Processors
adau1701
Yes, you could use a smaller transistor than what is on the ADAU1701 board. As long as your transistor meets the two specs mentioned in the datasheet - beta of at least 100 and power dissipation of at least 90 mW - you should be able to use it in the regulator circuit. The BC857 meets these specifications.
Please log in to reply.