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skuep / V0-Umbilical-Plus

Voron V0 Umbilical Plus with integrated ADXL345
GNU General Public License v3.0
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LP2985-33DBVR Unavailable #1

Open allisaurusp opened 2 years ago

allisaurusp commented 2 years ago

LP2985-33DBVR isn't in stock with JLCPCB. I couldn't find an analogue with the same package, so I'm thinking it would be worth making a revision in favor of a different part or package that's less affected by current shortages.

allisaurusp commented 2 years ago

XC6206P332MR should be functionally equivalent, and in the same size, but with different pinout. If there are no objections, I'll put together a MR

skuep commented 2 years ago

Thanks for the hint and pull-request. It's just dreadful at the moment. I originally chose the LP2985 because there were still plenty available on the market a few weeks ago. Luckily, this thing has second sources. In your case, I would choose one of these (preferrably the first) https://lcsc.com/product-detail/Linear-Voltage-Regulators-span-style-background-color-ff0-LDO-span_Texas-Instruments-LP2985AIM5X-3-3-NOPB_C271268.html https://lcsc.com/product-detail/Linear-Voltage-Regulators-span-style-background-color-ff0-LDO-span_Texas-Instruments-LP3985IM5X-3-3-NOPB_C132058.html

Note that there are no noise-curves whatsoever in the XC6206P332MR datasheet, and the Power-Supply-Rejection-Ratio (PSRR) is not really good. This seems to be a very low power LDO for portable (battery) applications.