I have looked into using 12v linear voltage regulators, coming down from 16V, i need 2 amps and the regulator is only rated for 1.5A (7812 linear voltage regulator) i am looking for a solution for getting 2A through the regulator. my fan is 1.68A rated at 12V and i'd like a little more than that.

can a buck do it? Other linear voltage regulators rated for more amperage?


  • \$\begingroup\$ Too much current for a linear regulator. \$\endgroup\$ – DKNguyen May 24 '20 at 19:10
  • \$\begingroup\$ yes , my understanding is that it is at the maximum, even with a heatsink. \$\endgroup\$ – kennethmods May 24 '20 at 19:13

A linear regulator would waste 8W which is quite a bit, so a buck regulator would be much better.

A buck regulator module based on Xlsemi's XL4016 would do the job nicely with plenty of margin, you can find inexpensive modules on eBay, Aliexpress etc.

  • \$\begingroup\$ i appareciate the answer - oging to check it out \$\endgroup\$ – kennethmods May 24 '20 at 19:14
  • \$\begingroup\$ current limit as i understand the datasheets is 10A. this is perfect for this application and several others, Cheers! \$\endgroup\$ – kennethmods May 24 '20 at 19:16
  • 1
    \$\begingroup\$ The datasheet shows 6A @12V. 10A is the switch current limit at 25°C. If the duty cycle is 50% the output current is then limited to 5A. I think they're probably good for 2,3,4, even 5A with reasonable margin, but one can crank the numbers through including thermal factors and see what the datasheet actually promises. \$\endgroup\$ – Spehro Pefhany May 24 '20 at 19:22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.