LPC3180 ARM uC power supply

LPC3180 is a ARM926EJS core which uses a 1.2V for the core, sdram, etc and 1.8V/3.0V for IO.

What power supply/regulators would be recommended? Would a singl regulator be recommened to achieve these multiple voltages? And how?

Thanks.

Reply to
kalyanamsaritha
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It can be a single regulator but it better has two output voltages. If you are working with such a device as the LPC3180 I am surprised about your question because routing a board for this chip is a true challenge for professionals.

An Schwob

Reply to
An Schwob in the USA

Some SDRAM are 2.5V. You should have on-board switching regulators for 1.2V/1.8V/2.5V/3.3V and 5.0V (if you run a hard disk).

Reply to
linnix

This is the same guy who's a self-professed "hobbyist" and "new to embedded" who wants to bit-bang USB host, and use DSP to interface Ethernet to the analog phone system.

Good luck to him - he certainly doesn't lack ambition.

Reply to
Clifford Heath

embedded"

analog

Yes, I am a hobbyist and all I am trying to do is understand the scope o the project in mind, and whether a ultra low-cost solution is eve possible. Although, the project appears to require professional help, i is still good to know.

In general, folks on this forum have been most patient and helpful. appreciate that greatly.

BTW, a budding telephony hobbyist could already benefit from work don at:

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(PCB designs and all ...)

Thanks.

Reply to
kalyanamsaritha

I hope you realize that making a board for such "Low Pin Count / High Ball Count" microcontroller is not trivial. You often need 4 to 6 layers PCB and more than 1/3 of it just for the power regulators.

Reply to
linnix

Being able to read "Recipes of the Great Chefs" won't make you a great chef. As a hobbyist in embedded myself, I have first-hand experience of this fact :-). The more you learn, the more you learn to respect experience.

Hang around, listen to Joerg, JL, Phil Hobbs, and others like them, and you'll learn more than you could imagine.

And for g%* sake, try a simpler project first. Something with only one or two chips, running at under 10MHz, in a pitch no finer than 0.05", and fewer than a hundred components in all. Design and build both the circuit and the board, then program the software and test the unit in real-world conditions, including resilience against EMI, temperature, being dropped, repeated power cycling, running with the batteries half flat or reversed, etc. When you can build a device that stands up under that kind of scrutiny, think about doubling the clock speed and/or number of components. Rinse and repeat. In ten years, you'll know if you're up to attempting the kind of project you've been talking about.

Reply to
Clifford Heath

I am aware that anything in a BGA package is not hacker friendly Unfortunately, uCs I am interested in are largely available in thi package (AVR32 AP7000 and LPC3180). These uCs appear closest to m requirements.

Apart from the PCB routing issues, I guess I will need at least 4 layer to conform to EMI anyways.

Any recommendations on power regulators (parts?) with multiple output (1.2V, 1.8V and 3.0V)?

I understand that I will need professional help, which invariably begin with the parts/components (by itself quite time-consuming) and I am hopin the community can help out. Will definitely be hanging around to continu my education.

Thanks.

Reply to
kalyanamsaritha

I would use adjustable switching regulators. Parts (size/value) depends on your target current consumptions. This is the major part in designing your circuits/layouts.

Reply to
linnix

Start by buying a development board with the device you want - or a more powerful version if possible - and get familiar with what it can do. Then start connecting other things to that to make your device. Expect that the first prototype will look like an elephant vomited. As long as it works, you'll be able to get help with the next step.

Reply to
Clifford Heath

I 100%+ agree..... You will need a lots of dollars ($500+ USD probaly) to get a multilayer board done (8 layers probably) .

Why dont you purchase a development kit first and get experience with known working hardware and profesional software.

I know million dollar companies that would steer away from such complex designs, as in their experince..... they can see trouble coming!

Joe

Reply to
Joe G (Home)

As a much simpler alternative, buy an eval board for the processor and interface your parts to that. You stand at least a reasonable chance of success if you get big important pieces pre-done and running out of the box.

Scott

Reply to
Not Really Me

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