topic Re: PMIC for fpga in Power Management

PMIC for fpga

Michaelscott237 — Mon, 23 Dec 2024 06:51:09 GMT

Hey, i have board which integrates two fpga's which needs several different voltages.

My main power is 12v

The first is fpga requires 1.2v for core and 3.3v for vccio and the second is requires 1.0 for core, 3.3 for some vccio, 1.0v for serdes core, 1.8 for aux and 1.1v for some vccio (for lpddr)

So i will need buck converters and ldo's for the serdes and aux power. I also need to power lpddr4 which for that i use a ti pmic which requires 5v and input that can be received from my main power.

For now i used lt8653 converters and tps74901 ldo's to power everything but i wanted to know if you have a PMIC to replace all this power system that can fit for my requirements.

Thanks in advance

Re: PMIC for fpga

guoweisun — Tue, 24 Dec 2024 02:27:17 GMT

Hi Michael

What are the loading capability for each regulators your required?

Re: PMIC for fpga

Michaelscott237 — Tue, 24 Dec 2024 15:12:25 GMT

Hey,
First fpga required 1.2v and 3.3v and has about 40mW power consumption.
Second fpga requires 1.0v core, 1.8v aux, 1.0v and 1.8v for serdes core and aux and 3.3/1.1 for io.
Power consumption around 500mW.
Enet phy requires 400mW.
Lpddr pmic requires 5v and 4-18v input.
Consumption around 200mW.

Regulators will power only serdes block and core voltages

Re: PMIC for fpga

guoweisun — Wed, 25 Dec 2024 12:12:31 GMT

1:For the 5V input I recommend MC34PF8100.

Re: PMIC for fpga

Michaelscott237 — Fri, 27 Dec 2024 09:18:37 GMT

Thanks, but its overkill for my design.
Thanks anyway