Continue to Site

Welcome to

Welcome to our site! 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.

Looking for simple DC-DC Dual Rail PSU with Voltage Regulation

Not open for further replies.


Newbie level 4
Jun 17, 2011
Reaction score
Trophy points
Activity points
I have some basic SMPS skills.

I need a SMPS that can take an input of 11-15v and provide +-30V REGULATED.
The nicest PSU I've found is SG3525 Push Pull Unregulated.
I prefer a design that uses a cheap, commonly available controller, integrated mosfet driver and DIP package.
(hence my attraction to SG3525)

Can anyone recommend a schematic?

Thanks, quite a nice tool, but it chose ICE3DS01L for every possible solution. Some very obscure chip, not stocked by Digikey or Mouser. I definitely won't find it in South Africa.

Can that schematic I pasted be modified to provide regulation?

How to get components to PowerSim

Push add part in designer
............there is directions , what to do
it ask to select sponsor
do so
initilize design
go to add part
or click the PWM block name
I try and get lot of ic`s to select
(depends of designed circuit 20...70 )

look get account

Last edited:

Hi, its not working.
I go to front page, enter 11-15v input and two outputs with 30v @ 2A untick +ve
then I click "My Design" and it says output 12v.

It keeps asking me to sponsor...

"Click here to change power supply's input and output voltages"
"Sorry you must sponsor"

Add Part > IC > Add
"You must sponsor, blah blah blah"

I made a free account, its still not showing the input/output voltages I chose.

I'm not interested in this powersim site, thanks anyway.

---------- Post added at 22:33 ---------- Previous post was at 22:31 ----------

Can you please answer my question about this PSU?
Can I add regulation to this PSU by adding output inductors and feedback to the error amplifier?
**broken link removed**
Last edited:

This circuit has voltage feedback

**broken link removed**

so. same circuit look pict. 2.

Ps. I test PowerSim without registering, visit only their sponsor site.
( ic-component company, nothing else and get ic-data added )


thank you so much :)
Funny how I missed that. Its cos I saw it long ago. I remember reading. Click here to see figure 9 for a simplified version with almost identical performance

Cool :) I noticed that powersim site doesn't have SG3525 ?

SG3525 is probably like TI/Unitrode UC1525 / 3525, a very simple voltage
mode regulating PWM. Certainly cheap; almost certainly not the best.

I found no 30V output DC-DC modules on Digi-Key. It's an abnormal
voltage. If you could stand 24 or 28V you'd have more luck. You
might be looking for an adjustable.

Building two single-output DC-DCs might be easier and result in better

Not open for further replies.

Part and Inventory Search

Welcome to