Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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

[req] Best choice for a 3.3V/200mA switching power supply?

Status
Not open for further replies.
leotim

leotim

Full Member level 3
Joined
Jul 13, 2005
Messages
166
Helped
5
Reputation
10
Reaction score
0
Trophy points
1,296
Activity points
2,596
Hi
I need a switching power supply (SMPS) for a digital circuit, with following specifications. What is your offer?
The offer may have lowest price or lowest components count or highest efficiency.

1) Input Voltage: 5-12V
2) Output Voltage: 3.3V
3) Output Current: 200mA
4) Isolation: NOT needed
5) Protections: NOT needed
 

Re: [req] Best choice for a 3.3V/200mA switching power suppl

Try something like the LM2674M-3.3 ..

Regards,
IanP
 

Re: [req] Best choice for a 3.3V/200mA switching power suppl

For the lowest component count and the lowest price, probably IanP's suggestion is the best.
For higher efficiency you can try LM3485 from National, with a low-charge external MOSFET.
For even higher efficiency you can try Maxim's MAX1744.
There are a few other solutions from Linear Technology and Fairchild.
 

Re: [req] Best choice for a 3.3V/200mA switching power suppl

One good choice is LM317. Download it's datasheet and choose R1 and R2. It simply work.
 

Re: [req] Best choice for a 3.3V/200mA switching power suppl

There are a number of regulators that can be of use to you from Linear Technology.
The following link will give you some ICs that will meet or exceed your specifications.
I have put in your specifications to populate the list.

https://www.linear.com/pc/categoryP...Category.jsp&navId=H0,C1,C1003,C1042&y=2&x=36

The nice thing about using these ICs is that LTC has a model for nearly all of their
components and the typical application is ready to be simulated. You can download
LTC's spice (LTspice) free from their website.

Best regards,
v_c
 

    leotim

    leotim

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top