spice models for voltage regulators
Bill Pendleton
nu...@cloud9.com wrote:
: Hello
: I am looking for a spice model for the LM340, LM320, LM317, LM117 , 78XX and 79XX series voltage regulators.
: Does anybody know where I can get them.
: Thanks in advance.
try http://nsc.com
--
Bill
Stephen Isaacs
Alright, what is a spice model? Also I think the web address above
should be http://www.nsc.com or http://www.national.com.
Stephen
Russ
Stephen Isaacs (ste...@myna.com) wrote:
Spice models are very beautiful and talented gals who love to give
design engineers & circuit analysts great massages while sitting in
front of the computer...a very powerful design aid <g>.
Seriously, they're just software versions of transistors, integrated
circuits, etc. that you can plug into a simulator and see how a
circuit design will work before building it in hardware.
russ
Steve Work
Russ (ru...@mail.ao.net) wrote:
: Seriously, they're just software versions of transistors, integrated
: circuits, etc. that you can plug into a simulator and see how a
: circuit design will work before building it in hardware.
SPICE is a program which has existed for somewhere around 20 years, it
stands for Simulation Program with Integrated Circuit Emphasis. In its
early form, people would define circuits something like this
V1 1 0 9V
R1 1 2 10k
R2 2 0 5k
This simple circuit has a 9-volt battery between node 1 and ground (node
0) an resistor (10k) between nodes 1 and 2 and a resistor between node 2
and ground. A computer will (quickly) determine that the voltage is 0
volts on node 1, 3 volts on node 2, and that the battery is supplying
0.6ma. It was (and still is) a valuable tool for analog integrated
circuit design.
More modern versions of this program have graphical input where a
schematic is drawn. There are freeware, shareware, and commercial
versions of the program. You might try searching a software archive such
as www.acs.oakland.edu, they likely have some freeware, shareware, and
demos available for download.
Andy Hughes
Bill Pendleton wrote:
>
> nu...@cloud9.com wrote:
> : Hello
>
> : I am looking for a spice model for the LM340, LM320, LM317, LM117 , 78XX and 79XX series voltage regulators.
> : Does anybody know where I can get them.
>
> : Thanks in advance.
>
> try http://nsc.com
>
> --
> Bill
Bill,
I've got a model for the LM140-5 in both PSpice and Saber format at
http://www.best.com/~symmetry. This should get you started.
Andy Hughes
Sam Goldwasser
I filled out an on-line form and got a free demo (supposedly fully functional
but of limited complexity) CD in a the mail.
--- sam