About FPGA Internal Core (1.5v) Low Voltage Supply?

[cssheu]

Hello:

I want to use Cyclone FPGA (EP1C12) VCCint = 1.5v，

but I have problem , I do not know which LDO to use?

My system input voltage will be DC 12V.

How do I get 1.5v from LDO?

I had found the LDO in Mirel and Ti , I do not get the satisfy solution.

Please help me , tell me the solution ........

Thanks a lot.......

 

[elcielo]

recommanded power supply

TI semiconductor

PT6728

1.5Vout 14 Amp 12V-Input Adjustable ISR, CU Case


Micrel

MIC4685, MICXXXX

Switching Regulators


LDO is Low input voltage.

 

[elcielo]

linear technology

Linear technology

LT1764 or LT1764A - 3A, Fast Transient Response, Low Noise, LDO Regulators

Wide Input Voltage Range: 2.7V to 20V

LT1575 - Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed

Wide Input Voltage Range : 1.36V to 22V

National

LMS1585A/1587 - 5A and 3A Low Dropout Fast Response Regulators

Maximum Input to Output Voltage : 13V

It's necessary heat sink.

 

[mr_ghz]

Hi cssheu

As the others already wrote you have different possibilities using a linear
voltage regulator. Mostly you will have the problem of the dissipated
power. If you have an Uin of 12V and a current of 200mA you will reach
more than 2W, this is too much for a small regulator.
A better idea is to convert 12V (or your input supply) with a switch-
regulator to 5V or 3.3V (I think you will also have such logic) and then
use the linear regulator. The switcher could be a 2576 from National.

Greets