Electronics > Beginners
Negative version of LP2951 LDO
ZeroResistance:
I'm looking for a negative output LDO, 100ma.
I found the positive version LP2951, however I'm unable to locate its negative version.
Like the LM317 has a LM337 version, I was expecting the same for the LP2951.
Am I missing something here or the negative version just does not exist for the LP2951?
Siwastaja:
Most regulators on the market don't have a "closely related" "negative version" with a similar part number. Positive regulators are much more widely needed, thus a larger selection exists.
Just do a parametric search on your supplier to find the negative voltage regulator you need, doesn't need to be closely related to any positive regulator you are using in the same circuit.
Andreas:
LT1964 if you can live with -20V maximum input voltage
with best regards
Andreas
RES:
LT1175 ?
-20V (-25V abs. max.), adj. Vout, 200-800mA, sense, current limit pins, shdn, SOIC8, 45uA op. curr., 10uA shdn curr.
https://www.analog.com/media/en/technical-documentation/data-sheets/1175ff.pdf
ZeroResistance:
Thanks to all the suggestions.
Price also is an issue.
The
LP2951 => $0.5
LT1964 => $3.6
LT1175 => $5.8
I was looking for something in sub-dollar range!
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