Is this a solid solution for an automotive 12 V-to-5 V circuit to power an ATtiny? I've been trying to come up with a solution for my needs that can handle the automotive environment that is so scary some places won't even talk about it.
From recommendations, scouring datasheets and lots of googling this is what I've come up with so far. It will be placed inside the cabin of a vehicle (not the engine bay) and everything selected is AEC qualified, but I don't know if it will actually work as intended or if I don't have enough protection (the ESD/TVS should kill most of the automotive nightmare right?). The other part of my circuit (not shown) is an ATtiny that will operate some auxiliary lighting.
Please don't say just use a USB 12 V adapter, because I'm not trying to couple multiple boards together hence trying to nail this circuit so I can include it on my device's PCB, but other than that please school me if I have anything incorrect.
**Also note the resistor for the LED is incorrectly rated in the schematic. It's supposed to be 150 ohm like the component list.
- D1: SMA6J5.0CA-TR
- IC1: ZLDO1117QK50TC
- C1: C1210X106M3RACAUTO 10 µF 25 V
- C2: TPSC107K010R0150 100 µF 10 V
-- Optional, for testing (not really important) --
- R1: ERJ-U06J151V (150 ohm)
- LED1: 150080GS75000