TPSM84A21: Voltage regulator IC for Xilinx Zynq Ultra+ MPSoC XCZU7CG-1FFVC1156E

Danilo A.

Part Number: TPSM84A21
Other Parts Discussed in Thread: TPS54824

Hi Team,

Our customer would like to use TPSM84A21 for Xilinx Zynq Ultra+ MPSoC XCZU7CG-1FFVC1156E. I have shared the link to the recommended voltage regulator IC for FPGA in the link below.

https://www.ti.com/design-resources/design-tools-simulation/processor-fpga-power/xilinx.html

He has further inquiries as follows:

1. I have looked through the offered solutions and I do not understand why the TPSM84A21/22 are not suggested. Is there a reason I am missing? Are they intended for other applications?

2. What is the main difference in application between the three regulator families? apart from the inductor/caps being included?

3. Do you know if the included internal inductor in the LMZ and TPSM can be supplemented by an external series inductor? Have you seen any cases where this was needed? Due to the lack of components in the market I need to choose regulators before any simulation can be done.

4. The output inductance in the TPS54824 is 1uH, while the internal inductance in the TPSM84A21 is 250nH (one for the PU, one for the PD). Could you explain the reason behind this difference?

Thank you for your support!

Regards,

Danilo

over 2 years ago

0 Yitzhak Bolurian over 2 years ago

TI__Mastermind 18370 points

Hi Danilo,

That does not mean that TPSM84A21/22 can not be used for supply of voltage to FPGA.
The other modules seem to be smaller in size, otherwise other modules can be considered as well.

Which regulator families are you referring to? Do you mean the columns mentioned in the link?
If so, one is modules (including the caps and inductors), one is converters meaning external inductor and caps required and one is controllers meaning external FETs required as well.

The included inductor of a module can not be supplemented and there is not need for supplementing it.

TPSM4A21 can run at much higher frequencies than TPS54824 does. Therefore the inductor can be of smaller value.

Hope this helps.

Regards,

Yitzhak Bolurian

0 Dor Aharony over 2 years ago

Prodigy 30 points

Hi Yitzhak, Danillo,

This answers my questions.

Thank you,

Dor

0 Yitzhak Bolurian over 2 years ago in reply to Dor Aharony

TI__Mastermind 18370 points

Hi Dor/Danilo,

If the above addressed you questions, please set the status of this post to resolved.

Thanks and regards,

Yitzhak

0 Danilo A. over 2 years ago in reply to Yitzhak Bolurian

TI__Mastermind 24715 points

Hi Yitzhak,

Thank you very much for the clarification..

Regards,

Danilo

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TPSM84A21: Voltage regulator IC for Xilinx Zynq Ultra+ MPSoC XCZU7CG-1FFVC1156E