Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

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

Status
Not open for further replies.

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.......
 

elcielo

Full Member level 6
Joined
Jun 13, 2002
Messages
383
Helped
15
Reputation
30
Reaction score
8
Trophy points
1,298
Activity points
3,250
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

Full Member level 6
Joined
Jun 13, 2002
Messages
383
Helped
15
Reputation
30
Reaction score
8
Trophy points
1,298
Activity points
3,250
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

Full Member level 5
Joined
Apr 1, 2002
Messages
289
Helped
7
Reputation
14
Reaction score
5
Trophy points
1,298
Activity points
3,551
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.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top