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TPS6521815: Multi-Output Power IC with Integrated Inductors for FPGA

Conor
Guru 12235 points
Part Number: TPS6521815

Tool/software:

Hi,

We are currently considering a new power supply architecture for an FPGA board and would like your recommendation for a suitable TI power management IC that meets the following requirements.

[Background & Use Case]

  • Target FPGA: Intel 5CEBA9F23C8N

  • Input Voltage: 12V

  • Key Requirement: Multi-output DC-DC converter with integrated inductors

  • Current product: MPS MPM54304GMN

[Planned Output Configuration]

  • 1.1V (for FPGA core)

  • 1.8V (for ADC, assumed to be generated via LDO from 3.3V)

  • 2.5V (for FPGA PLL and some VCCIO/VCCPD lines)

  • 3.3V (for FPGA I/O and other peripheral ICs)

We would like to confirm whether devices such as TPS6521815 or TPSM84 series are suitable for this application, or if there are any more optimal alternatives you could recommend.

Thanks,

Conor

  • 0
    TI__Genius 10407 points

    Hi Conor,

    Thank you for your interest in TI devices, 

    Unfortunately we do not have any PMICs with integrated inductors, 
    We do have some buck modules with integrated inductors: https://www.ti.com/power-management/dcdc-power-modules/power-modules-integrated-inductor/overview.html

    If you are still interested in using a PMIC for this application, then TPS6521815 could be a suitable solution, since its output values are user-programmable. 
    It does have more excess rails than may be necessary.

    Or, since you mentioned the 1.8V rail can be an LDO,
    then I would also recommend taking a look at the TPS6521905 as well, which has 3 programmable bucks, and 4 LDOs.

    Both of these devices are lower VIN, so some level shifter / regulator would be required to bring the input voltage down from 12V into the acceptable VIN range. 

    Let me know if you have questions regarding these PMIC devices. 

    Best Regards, 
    Sarah