3.3V Regulator

[[email protected]]

Dear Group, I looking for a 3.3 Volts Regulator (linear or Switched) on
a small package,
@ 2Amps, Anyone know some types?, it will be very comercial chip!
Thanks

 

[[email protected]]

Dear Group, I looking for a 3.3 Volts Regulator (linear or Switched) on
a small package,
@ 2Amps, Anyone know some types?, it will be very comercial chip!
Thanks

This is such an open-ended question I don't know where to start.
I think you need to give more information. Like, input voltage, and if
heat/efficiency matters.

 

[Jamie]

This is such an open-ended question I don't know where to start.
I think you need to give more information. Like, input voltage, and if
heat/efficiency matters.

Hmm, a basic Zener of aprox 3.8v volts on a basic
base driver circuit maybe ?
i guess it would be in impact mode at that low
level instead of zener mode. oh well

 

[[email protected]]

Well, I think that input voltage is between 9 adn 12 VDC, the current
output must be at leas 1.5 Amps

 

[Pooh Bear]

Well, I think that input voltage is between 9 adn 12 VDC, the current
output must be at leas 1.5 Amps

Which means that the package size is likely to be be determined by thermal
dissipation if a linear regulator is used ( Pd = Vin - Vout X Iload so up to 18W
! ) so a switcher seems the best idea.

Graham

 

[Rich Grise]

Well, I think that input voltage is between 9 adn 12 VDC, the current
output must be at leas 1.5 Amps

First you said 2 amps. 1.5 amps is significantly different - use an
LM317. They come in SOT-223, but you'll need a significant heat sink.
http://www.national.com/pf/LM/LM317.html

Good Luck!
Rich

 

[[email protected]]

do you know the sharp series?, like the 070XH02, how I can use this?

 

[[email protected]]

do you know the sharp series?, like the 070XH02, how I can use this?

Use a National LM2678 or similar. These switchers are actually good
for 5A. I've been using them and they work well. I believe there's
another part number that works up to 2 or 3 A. The LM2678 is
adjustable, but there is a 3.3V-only version.

With 9-12V in, you "have" to use a switcher. A linear is going to
generate tons of heat.

 

[Pooh Bear]

First you said 2 amps. 1.5 amps is significantly different - use an
LM317. They come in SOT-223, but you'll need a significant heat sink.
http://www.national.com/pf/LM/LM317.html

You'll never get that much heat out of an SOT-223 package.

Graham

 

[Pooh Bear]

do you know the sharp series?
No.

like the 070XH02, how I can use this?

A Google for "070XH02" suggests it's obsolete.

Graham