As per the datasheet, The TPS7A85 can either use external resistors or the internally-matched ANY-OUT feedback resistor network to
set the output voltage.
I want to use ANY-OUT pins to set the output voltage, for the following cases
1) Vout = 1.01 V
2) Vout = 0.925 V
please give some input on how to configure the same.
thanks,
Nikhil
Hi Nikhil,
To increase the resolution for TPS7A85 you could configure the device as following:
Also, as mentioned in the Data Sheet, you can tie the 800mV pin to the SNS pin and the new ANY-OUT ranges are 0.8 V to 1.175 and 1.6V to 1.975V
Therefore, to obtain a 0.925, then Vout=0.8V+0.1V+0.025V by tying Pin 7 and Pin 5 to GND
For the 1.01 the following configuration could be used:
By changing the external resistor to 128*R will allow to have a resolution of 12.5mV. This however will allow a 1.0125V and not a 1.01 Vout rail.
In addition, please it is important to consider the accuracy of Vout as well.
You can also reference to the following thread for further information:
Best,
Edgar Acosta
