PF8200 VIN vs SWXIN Voltage

[adevries]

Hello,

For the PF8200, is it important to have the voltage on VIN match the voltage on the Switch and LDO inputs? (SW1IN-SW7IN and LDO12IN-LDO4IN). Or can VIN be run at 3.3V while the Switch and LDO inputs are at 5V?

Thanks

[guoweisun]

Hi

Don't suggest your do that! Using VIN different from SW and LDO input.

[adevries]

Hi G.W. Sun,

Thanks for the response. Would it be safe for me to have VIN at 5V, and SW and LDO inputs unpowered (at 0V)? Or will that also break the PF8200?

[nelson_scheja · Accepted solution]

I just created a thread about exactly this topic few days ago: Different inpult voltages lead to destruction??? 

So, despite the datasheet saying nothing about it, this is not allowed.

[adevries]

Oh wow, thank you for linking that thread. I'm really glad I asked this question. Thanks for the info!