Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

Sold Out: 3A LDO Regulator LD1085 (LM317 type)

jib77

jib77

0
Joined
Jun 19, 2010
Messages
718
Points
0
I got the wrong size part to make a 3A version of my driver. These are about the same size as LM317's but with bent legs for use on SMD pads.

Part#: LM1085D2T by ST Micro
Package: D2PAK
4935-d2pak.png

Datasheet: www.st.com/stonline/books/pdf/docs/6738.pdf

0 available.
 
Last edited:





Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Hey guys -

Gobble these up - they're phenominal ICs. They work just like LM317s, and you can pretty much use them in place of LM317s without adjusting your circuit.

Except instead of being limited to ~1.5 A, they'll handle up to 3A, and instead of dropping ~2.5 V like an LM317, they only use about half of that.

This is a great deal too. You won't regret it. I just used this IC (thanks for the tip Jib) in my latest build this afternoon (shameless plug, hehe) and it's an awesome chip to work with!
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Thanks rhd! Dropout on these are only 1.5V. They do requires 10uF ceramic input and output caps per the datasheet.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

I've been using the 1085s (and 1084s) a bunch since you suggested them. Awesome little chips. As per your suggestion, I just put a 10uF ceramic on the input and output. All in all, it's still < $4 for the circuit.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

That's not too bad shipped. You can get them for about $1.90 each at Mouser, so this saves you that cost.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

:bumpit: 7 still available.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Any chance you could provide the 2 needed 10uF capacitors with the LM1085 for additional cost?
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Drew said:
Any chance you could provide the 2 needed 10uF capacitors with the LM1085 for additional cost?
Click to expand...

Yes, I do have a very limited amount of extra caps (8). Only $1 extra for each *pair* of caps (IIRC I paid like $0.59 each for these). These are 1206 sized 10V SMD caps from TDK.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Again, I'll attest to the fact that this is a great deal. 10uF ceramic caps aren't dime-a-dozen like aluminum electrolytic caps, etc.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

jib77 said:
Yes, I do have a very limited amount of extra caps (8). Only $1 extra for each *pair* of caps (IIRC I paid like $0.59 each for these). These are 1206 sized 10V SMD caps from TDK.
Click to expand...

That's great! I'd really like one and a *pair*.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Ok let's do 2 sets, I always regret not getting a spare.:thanks:
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Hmm I guess I'm gonna need two or three of these....
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

hey jib, by any chance do you know what the adjust pin/reference voltage is on these guys. Im not hijacking the thread, just pm me if you know cuz the datasheet didnt specify the reference voltage so i dont know what value resistors to use cuz i have a few lying around.
 
Re: FS: 3A LDO Regulator LD1085 (LM317 type)

Got them yesterday. Thanks a bunch!
 
You must log in or register to reply here.


Back
Top