TPS65220: TPS6522053 with VSYS=5V

Thomas Langhammer

Part Number: TPS65220
Other Parts Discussed in Thread: SK-AM64B, AM6412

Hi,

I am developing a custom board based on AM6412. As PMIC I would like to use the TPS622053 as recommended by TI and which is used in the SK-AM64B (I am also using LPDDR4).

Is there any reason why the TPS6522053 + AM64x solution is recommended only for VSYS=3,3V? For better efficiency I would prefer to use VSYS=5V (which is already present in the design) instead of VSYS=3.3V which needs to be derived from the 5V with further DC/DC losses. The only reason I can see is LDO1 which is configured as bypass, but this could be solved by powering PVIN_LDO* from the 3.3V rail.

Tom

over 1 year ago

0 Brenda Diaz over 1 year ago

TI__Mastermind 22421 points

Hi,

Thank You for using E2E! The TPS6522053 PMIC can be used with 3.3V or 5V input supply. When using 5V input supply, we recommend replacing the external load-switch with a 3.3V Buck to supply the 3.3V IO domain on the processor and to supply PVIN_LDO1 on the PMIC. Please let us know if there are any questions.

Just for reference, here is the link to the TPS6522053 Technical Reference Manual (TRM) which describes the default register settings: https://www.ti.com/lit/pdf/slvafd0

Thanks,

Brenda

0 Thomas Langhammer over 1 year ago in reply to Brenda Diaz

Intellectual 580 points

Hi Brenda,

Thank you for your answer. This was exactly what I wanted to know.

Best Regards

Tom

Power management

Power management forum

TPS65220: TPS6522053 with VSYS=5V