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OpAmp differential voltage range ?

I thought I found an ideal micro power OpAmp for another low power LDO I'm building in the LMV641. Small offset, RR output, 10MHz GBW, 2.6 V/us and still pretty good drive capability +/- 20mA.

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There's one thing I'm concerned about it specs a max differential input of +/- 0.3V. Under normal operation this shouldn't be a problem but at start up and shutdown this may be exceeded. Is this likely to hurt the reliability of OpAmp? Should I place current limiting resistors on both opamp's inputs?

Schematic

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Reply to
Hammy
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Many opamps have clamp diodes between their inputs. A few mA of transient current won't do any harm. Your circuit looks OK as-is.

Incidentally, your circuit is backwards. Convention is input on the left, output on the right.

John

Reply to
John Larkin

Thanks John.

This is the first LDO I've built that actual performs identically to the spice simulation.

Guilty as charged. I don't know why I do that sometimes. If you look in the bottom right corner you'll see I stuck with convention for my

1/Beta schematic. Input to the left.;)
Reply to
Hammy

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