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

Status
Not open for further replies.
C

cssheu

Junior Member level 3
Joined
May 25, 2001
Messages
31
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
212
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.......
 

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.
 

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.
 

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
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…