Converting 12V/24V to 5V DC
Worked for 1 min 4 sec
Yes — the best fit I found is:
Recommended through-hole 22 µF capacitor
Table
| Part | Why it fits |
|---|---|
| ECE-A1EN220X | 22 µF, 25 V, radial through-hole aluminum electrolytic. This is the cleanest match for a 5 V bulk decoupling / bypass capacitor. |
Table
| Part | Why you might choose it |
|---|---|
| 50V22uF CD288 | Also 22 µF through-hole, but 50 V rated, so it gives you more voltage margin if you want extra headroom. |
- Use ECE-A1EN220X for the 22 µF through-hole bulk capacitor on your 5 V rail.
- Keep in mind: for true decoupling, a 22 µF electrolytic is usually the bulk capacitor, and it should be paired with a 0.1 µF ceramic close to the IC because electrolytics have much higher ESR than MLCCs
- Also, the guidance for bypass/decoupling commonly uses 100 nF + 10 µF, while larger 22 µF to 100 µF values are typical as bulk output capacitance in power-supply stages
If you want, I can next find:
- the best matching 0.1 µF through-hole ceramic to pair with it, or
- a 22 µF part specifically matched to LMR51430XDDCR.
Find radial 22µF
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Design Notes
Through-hole passive conversion
- Replaced all originally non-through-hole resistors with Generic Resistor parts using
H_AXIAL-P7.62_D2.5packages while preserving each original resistance value and designator. - Replaced all originally non-through-hole capacitors with Generic Capacitor parts using through-hole disc or radial packages while preserving each original capacitance value and designator.
- Left already through-hole capacitors unchanged: C1, C2, C3, C4.
- Restored the original schematic connectivity for all replaced passive components after replacement.
Follow-up review items
- The current PCB layout still shows the replaced passives with legacy SMD footprint assets, so the layout must be reviewed and updated before fabrication.
- Through-hole parts will require larger keep-out, hole drilling, and likely placement/routing changes versus the previous SMD layout.
- CHboot, CHin, CHout, CHinx, CLin, and CLout are currently generic through-hole capacitor placeholders; select final manufacturer parts with appropriate voltage rating, polarity/ceramic type, ESR, and ripple-current capability before manufacturing.
- CHss and CHff are also generic through-hole placeholders; confirm final dielectric, tolerance, and lead spacing during sourcing.
Through-hole passive conversion
Follow-up review items
