TPS62901: What is max value of resistor connect to GND for the mode pin to consider as shorting to gnd

Hi Dongxing,

We will check and get back on this.

Regards,

Haseen.

Hi Dongxing,

We are checking internally on this mode pin change dynamically.

Best regards,

Usha.

How about connect mode pin to high? any resistor value limitation?

would like suggestions on how to control mode pin change dynamically.  

Hi Dongxing,

Spec of mode high is 1V as min value, 

For low, I will suggest using less than 100ohm would be better.

Will check the voltage with resistor on EVM and update.

Best regards,

Usha.

Hi Dongxing,

I checked with EVM with the following setup, connected 75ohm resistor between mode pin and ground with a switch and connected 2V power supply.

Testing: Firstly, connected 75ohm with switch ON without the power supply. In this mode, Inductor current is in DCM so, Gnd setting is working with 75 ohms.

Then keeping switch ON I connected 2V power supply, now I can observe that inductor current is in continuous mode as expected, so dynamic mode change is working.

Hope this clarifies your query.

Best regards,

Usha.

75ohm is quite low. There are too much current needed for that resistor when switch on. This is not good for dynamically control through a GPIO.