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CJ6101A39M
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# CJ6101A39M++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L++CJ6101A39M from Changjing, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VSS | power_in | Device ground / negative supply return. Connect to system ground; all voltages are referenced to this pin. |+| 2 | VOUT | power_out | Regulated positive output, fixed 3.9 V (A39 suffix) at up to 300 mA. Requires a 1 µF (ceramic or tantalum) output capacitor from VOUT to VSS close to the pin for loop stability and transient response. |+| 3 | VIN | power_in | Unregulated positive supply input, 1.8 V to 8 V (absolute max 9 V). Bypass with a 1 µF ceramic capacitor to VSS; a small series resistor (~3 Ω) with an X5R MLCC is recommended to suppress start-up voltage spikes when hot-plugging to a live source. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-23-3L |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `CJ6101A39MM`+- `CJ6101A39MP`+- `CJ6101A39MF`++## CAD (KiCad official)++- Symbol: `CJ6101A39M`+- Footprint: `Package_TO_SOT_SMD:SOT-23-3`+- 3D model: SOT-23-3L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj6101a39m-datasheet.pdf) (10 pp, sha256 `281a1425e68c58c2`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cj6101a39m-datasheet.pdf)
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