Q: TPS65053 unused ldo by 8157

Customer is using the TPS65053, but doesnt need LDO2 and 3.  I sent them the following reply.  Please verify that it is correct.  I based it off of a previous post, and assumed that the TPS65053 and TPS65023 would have the same requirements. 

....

You can get rid of the extra components. Here is what you should do.

• Tie EN_LDO2 and EN_LDO3 to GND.

• Connect FB_LDO2 to VLDO2 and don’t connect it to anything else. You can then remove the LDO2 resistor divider and output caps.

• Leave VLDO3 floating. Remove its output cap.

• Leave VINLDO2/3 floating. You can then remove bypass caps associated with that input.

...

You guys should add a "what to do with unused regulators" section to each of the PMU datasheets.

Thanks,

Mike Score


A: Re: TPS65053 unused ldo by 1129650

Mike, 

You are correct with the configurations for unused regulators VLDO2 and VLDO3. 

Thanks for the feedback, I will see if this is something we can get in the datasheets.