favorite LDO?

Question

Any preferences for a positive low-dropout linear regulator? I'd like

Leaded package, preferably no power pad

5v or so max input
1v min adjustable output (low enough for FPGA cores)
500 mA or so

dropout up to 0.5v would be OK. 1v even.

aux bias supply is OK

I'm currently using a tiny leadless power-pad ST part that I hate. I suspect that it goes bonkers if there is a fast charge-injection spike on its output, too. I'm going to experiment with that today, but I need manufacturing to solder one down to a test board; mere mortals can't do that.

jlarkin · Accepted Answer

I have the TCA0372 dual opamp on the BOM already. That might make two LDOs. --  John Larkin      Highland Technology, Inc The best designs are necessarily accidental.

piglet · Answer

LM1117-ADJ is a well studied jelly bean but only goes down to 1.25V and  just misses your 1V drop-out. piglet

Phil Hobbs · Answer

There's the LDL112DR (ST Micro), 1.2A, 5.5Vin max, 0.8 min Vout, 0.6 Vdo, SO8, 40 cents in reels

and the MCP1725/MCP1726, similar 0.5/1.2A, with 0.36Vdo, SO8, also about

40 cents.

I haven't used either of them.

There are also fixed-voltage ones in SOT23 packages, such as the TLV74010 (1.3Vdo, 4 cents in reels).

Cheers

Phil Hobbs

John Larkin · Answer

On Thu, 4 Mar 2021 17:33:21 +0000, piglet    wrote:That's one of my favorite parts, given the limits you mention. I havea trick for using it with low-ESR output caps.I could use that in a few places on my board, but not all.

piglet · Answer

Diodes/Zetex AP7365 looks interesting also Microchip MCP1826 and Rohm BD00IA5WEFJ might fit your needs.piglet

favorite LDO?

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