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CJ431D-N3A-ARG
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+51@@ -0,0 +1,51 @@+# CJ431D-N3A-ARG++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23++CJ431D-N3A-ARG from Changjing, in a SOT-23. 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 | R | input | Reference input pin. Compared internally to the 2.500 V bandgap reference; drive from the external divider between Cathode and Anode to program VKA. IREF is typically 0.7 uA (max 4 uA). |+| 2 | K | power_in | Cathode. Shunt current input / regulated output node. Sinks 1 mA to 100 mA of cathode current (IKA), absolute max VKA = 40 V, recommended max VKA = 36 V. Dynamic impedance ZKA typ 0.15 Ω. |+| 3 | A | power_in | Anode pin, normally grounded. All device voltages are referenced to the anode terminal. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-23 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `CJ431D-N3A-ARGN3A-ARG`+- `CJ431D-N3A-ARGN3A-BRG`+- `CJ431D-N3A-ARGP3A-ARG`+- `CJ431D-N3A-ARGP3A-BRG`+- `CJ431D-N3A-ARGTAA-AAG`+- `CJ431D-N3A-ARGTAA-ABG`+- `CJ431D-N3A-ARGTAA-BAG`+- `CJ431D-N3A-ARGTAA-BBG`+- `CJ431D-N3A-ARGN3B-ARG`+- `CJ431D-N3A-ARGN3B-BRG`++## CAD (KiCad official)++- Symbol: `CJ431D-N3A-ARG`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj431d-n3a-arg-datasheet.pdf) (24 pp, sha256 `b75990ca44bd0e7d`, 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/cj431d-n3a-arg-datasheet.pdf)
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