Artix 7 Power supply design

Hello,

I'm designing a power supply for Artix 7 and I have shortlisted LTM4633 and LTM4634 for usage. The plan of usage is this:

LTM4633 (1) - Vout1 - Vccint, Vccbram (1 V)

                       Vout2 - MGTAVCC (1 V)

                       Vout3 - MGTAVTT (1.2 V)

LTM4633 (2)   Vout1 - Vccaux (1.8 V)

                       Vout2 - FX3 USB 3.0 tranceiver core-supplies (1.2 V)

                       Vout3 - FX3 USB GPIF pins and FPGA bank 15 (1.8 V)

LTM4634        Vout1 - DDR3 and Bank 16  -- 1.35 V, calculations indicate a 88.7k will generate ~1.347 V)

                       Vout2 - All other ICs (like SPI memories, USB-JTAG interfaces etc) and Bank0 and Bank14 (3.3 V)

                       Vout3 - Banks 34 and 35 (2.5 V for LVDS I/O)

Can someone guide me and verify if this is ok ? also, I find the pins on both the 4633 and 4634 are the same. Are both this ICs compatible ? i.e., given they satisfy the voltage and current requirements, can they be used interchangably ?

Thank you,

Mugundhan

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  • 0
    •  Analog Employees 
    on May 9, 2018 12:42 AM

    The design looks fine. LTM4633 and LTM4634 both have three outputs. The third channel can give higher Vout than channel 1 and 2. LTM4634 is meant for higher voltage, lower load current application compared to LTM4633. They two are pin compatible and can be used interchangably if the specs are met.

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  • 0
    •  Analog Employees 
    on May 9, 2018 12:42 AM

    The design looks fine. LTM4633 and LTM4634 both have three outputs. The third channel can give higher Vout than channel 1 and 2. LTM4634 is meant for higher voltage, lower load current application compared to LTM4633. They two are pin compatible and can be used interchangably if the specs are met.

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