Hello,
I am designing a board with the LT7182S. I have two instantiations -- one instantiation where I combine VOUT0 and VOUT1 and set voltage to 2.0V, and another where I combine VOUT0 and VOUT1 and set voltage to 4.0V. Since the lookup table for the VOUTx_CFG resistor strap does not include 2.0V or 4.0V, my 'plan' is to set it to something 'close' via resistor strap, and then use the DC1613A PMBus pod to change the VOUT with LTPowerCAD.
However, ADI gives no particular procedure for changing VOUT0/1 via LTPowerPLAY.
To that end, I purchased the DC2836A EVM for the LT7182S and decided to see if I could figure out a procedure. HW-wise, I strapped VOUT0_CFG to 1.8V and set up a polyphase configuration. I also followed the reference design schematic notes to set up VOUT0 and VOUT1 in a parallel configuration. With VIN=12V, it powered up fine -- VOUT0 = VOUT1 = 1.8V and the POWERGOOD LEDs green. From there, I did the following:
1. Set the OPERATION register to 0x40 (soft power down), in both U0:0 and U0:1.
2. Set the VOUT field to 2.0V in the GUI for both U0:0 and U0:1.
3. Set the VOUT_MAX in the GUI to 2.1992V for both U0:0 and U0:1 (actually, one time it did this for me, the other time it didn't).
4. Powered up U0:0 and U0:1 --> the VOUT was 2.0V as expected.
Does it seem like a reasonable procedure?
Regards,
Mark
