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'[EE] 5V smt regulators'
2005\05\12@020052 by Chetan Bhargava

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Hi,

Are there any surface mount 100ma regulators close to the price of
78L05? Need not be a LDO, can be SOT23 or SOT223 but not SOIC.

I did a search but all SOT packages are priced higher than the TO92

Thanks in advance.

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

2005\05\12@035823 by Russell McMahon

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flavicon
face
> Are there any surface mount 100ma regulators close to the price of
> 78L05? Need not be a LDO, can be SOT23 or SOT223 but not SOIC.

The 78(L)05 is one of the nastier regulators out. It's reasonable to
expect to pay at least a slight premium for almost anything else.
Looks like about double :-(.

Why not SOIC - is size an issue?

What sort of volume?
What sort of target price?

Many SMT regulators available.
Price depends (of course) where you buy and volume.
Asian prices are quite attractive.

78L05 is $US0.10 - $0.15 ish in 1000s from Digikey.
That's going to be hard to beat!.

Holtek HT71xx family are very nice. HT7150 is 5v version.

NJU72xx is not as nice - so MAY be cheaper.
Digikey only has TO92 version at 100 mA.

The 2950 comes in SMT versions.
Around $US0.30/1000 Digikey.
eg
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=349609&Row=337040&Site=US


tHE sc5205 MAY SUIT YOUR NEEDS if YOU CAN SOURCE IT - USUALLY aSIAN i
THINK
EG     http://www.100y.com.tw/E-Catalog-pdf/38-05.pdf
hMMMM cAPsLocK
Semtech they say.
5 pin SOT23


LP2985?
SMT
Similar $ to 2950
eg
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=352400&Row=335361&Site=US


       RM



2005\05\12@063217 by Alan B. Pearce

face picon face
> Are there any surface mount 100ma regulators close to the price of
> 78L05? Need not be a LDO, can be SOT23 or SOT223 but not SOIC.

Well you can LM317 in SO-8

Microchip have a range of SM regulators, but I have never used them. IIRC
they have some SOT23 ones. I do recall people complaining that some of their
range have a low limit on input voltage if that is a concern.

2005\05\12@072921 by Spehro Pefhany

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At 11:00 PM 5/11/2005 -0700, you wrote:
>Hi,
>
>Are there any surface mount 100ma regulators close to the price of
>78L05? Need not be a LDO, can be SOT23 or SOT223 but not SOIC.

The 78L05 is going to be the cheapest regulator you can get. Other
than high Iq and dropout, there's very little wrong with it, so
you should use it if you can. You can get it in micro-SMD or SOT-89,
for very low prices (eg. 0.18/1K from National in 1.3 x 1.3 mm micro-SMD)

If you need better electrical performance, there are other regulators
with lower dropout, tighter tolerance, lower Iq etc. but usually at the
expense of price, availability, maximum input voltage, and fussiness about
output capacitance and ESR for stability.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spam_OUTspeffTakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff


2005\05\12@125818 by Chetan Bhargava

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Thanks People,

The reason for choosing 78L05is that Vin can go up to 12V! I'm looking
for a low quantity about 100 max. Reason I left out an SOIC is because
of the large footprint.

I can also visualize a surface mounted TO-92 :-)

Found out that TI makes a 78L05 in SOT-89.

Part# UA78L05ACPK
Price: $0.112
MOQ is 1000 :-(

Arrow sells this part for $0.18.

Thanks,

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

2005\05\12@131532 by Chetan Bhargava

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>
> tHE sc5205 MAY SUIT YOUR NEEDS if YOU CAN SOURCE IT - USUALLY aSIAN i
> THINK

Arrow has a price of $0.77 but no stock.

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

2005\05\12@131607 by PicDude

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On Thursday 12 May 2005 11:58 am, Chetan Bhargava scribbled:
> Thanks People,
>
> ...
> Part# UA78L05ACPK
> Price: $0.112
> MOQ is 1000 :-(
>
> Arrow sells this part for $0.18.


Arrow's website is odd -- they only list 1-pc pricing.  If you call them you
will generally get better pricing.

Cheers,
-Neil.


2005\05\12@164538 by Chetan Bhargava

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> Arrow's website is odd -- they only list 1-pc pricing.  If you call them you
> will generally get better pricing.

Yeah, earlier they used to mention budgetary price but I haven't seen
it lately. I have found that their 1-pc pricing is sometimes better
than digikey.

Regards,

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

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