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blueroomelectronics

Well-Known Member

• Dec 17, 2008

• #21

I've use the National Semi Simple Switchers like the LM2675, they're really nice little regulators and they run cool compared to linear device.
**broken link removed**

On a sidenote the 78S05 can handle 2A but you need to keep it cool.

 

ericgibbs

Well-Known Member

Most Helpful Member

• Dec 17, 2008

• #22

hi atom,
What are the details of the voltage source on the input connector and what are you driving with the +5V and 3.3V.?

 

AtomSoft

Well-Known Member

• Dec 17, 2008

• #23

sorry guys this is for normal usage like a micro and SD card. Maybe a glcd or CLCD(char lcd)

This thread was mainly for the first post but i didnt want to make another POWER thread juts for this. Im DO NOT need more than 1A-1.5A for this. I need this for a SD thing im doing just want to make sure i have each section at 100% or close

 

AtomSoft

Well-Known Member

• Dec 17, 2008

• #24

LM2675 takes a nice high voltage in. How does it not heat up when it drops it must be cool.

 

U

Ubergeek63

Well-Known Member

• Dec 17, 2008

• #25

AtomSoft said:

LM2675 takes a nice high voltage in. How does it not heat up when it drops it must be cool.

Click to expand...

the power that would be dissipated in a linear is stored in the inductor.

 

blueroomelectronics

Well-Known Member

• Dec 17, 2008

• #26

Switchmode regulators are very cool, they're only on long enough to charge the inductor and most boast very high efficiency.
Most of us have enough parts in the junk drawer to give Roman Black's famous SMS designs a spin...
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