12V-5V step down how?,help

[videogudu]

12v to 5v

can someone help me what ic to be used to step down 12V to 5V
thks,in advwnce

 

[IanP]

how to step down 12v to 5v

The obvious choice is the LM7805 (or if the load current is below 100mA – 78L05) linear voltage regulator ..
Of course, if you are concern about efficiency and temperature issues (heatsink), you can have a look at switching step-down voltage regulators (they may require some external components such as inductor etc.)..
All depends on the application ..
Rgds,
IanP

 

[rajudp]

12v down to 5v

do you need more than 1 A current?

 

[kanand078]

12v-5v ic

pls use the 7805 regulator u can get the 5v easily

 

[videogudu]

step down 5v

i need 2A output current which lm7805 cannot provide so is there anyother ic which can drive upto 2A output current.

 

[kanand078]

lm25xx

hi use this following ic DCP021205U but u can get o/p current is 400ma only

Added after 9 minutes:

hi,
use the DC TO DC convertor
https://www.allproducts.com/ee/powerwin/38-205w_dc_dc_atx_type.html
search this website.

 

[IanP]

12v step down

Mate, you haven't done your homework ..
The 78-family has two voltage regulators that can handle current above 2A:
78S05 - 2A
78T05 - 3A
However, you should really consider switching regulators and the LM2575T can be a good candidate for this job ..
Rgds,
IanP

 

[FvM]

12v-5v

However, you should really consider switching regulators and the LM2575T can be a good candidate for this job ..

LM2575 isn't capable of delivering 2A, you have to use a LM2576 instead. Also this first generation Simple Switcher has a rather limited efficiency of about 80%, newer devices as LM2676 are performing better. LM25xx parts are cheap and widely available, but may require a small heatsink for 5V/2A.

 

[Kripton2035]

12v to 5v step down

sorry but you need to dissipe (12-5)*2 = 14W of power
any linear regulator 78xx will melt...
you must use a switching regulator
the max1649 is a good candidate, and is available in pdip or soic package, easy to soldier...
(and also as samples... )

**broken link removed**

 

[videogudu]

12v step down 5v

how about using LM1085

 

[sreevyas]

5v stepping voltage regulator

intact. the 12V input should be capable enough to drive the 1amp current

Added after 8 minutes:


These requlators give upto 5Amp
L4970 and L4974A.
try it out

 

[vaibhav.k]

12v to 5v 2a

LM 2576 is really good option for converting 12V to 5V2A

 

[cameo_2007]

voltage regulator 5v 12v 2576

how about using LM1085

you can use whatever stuff which does that job.
the point here is whether you need an efficient one or not.
LM1085 is a linear device compared to 2576 which is a switcher,but for an extra price of 0.38$,which should be worth when efficiency is concerned, and yeah,consider the global economic crisis too. .