CJ6211B28M

@@ -0,0 +1,46 @@+# CJ6211B28M++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L++CJ6211B28M from Changjing, in a SOT-23-5L. 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 | VIN | power_in | Unregulated power input. Operating range 1.8 V to 6.0 V, absolute max 7 V. Bypass with a 1 µF ceramic CIN to VSS close to the pin. |+| 2 | VSS | power_in | Ground / negative supply return for the regulator. All voltages are referenced to this network ground. |+| 3 | CE | input | TTL-logic chip-enable input, active high. VCE high threshold ≥1.5 V (up to VIN), VCE low ≤0.3 V. B-variant integrates a pull-down resistor so the part defaults off when CE floats; driving CE low enables the internal N-channel discharge FET across VOUT-VSS (≈60 Ω typ.). |+| 4 | NC | unconnected | No internal connection. Leave floating or tie to VSS on the board. |+| 5 | VOUT | power_out | Regulated output, 2.8 V for the '28' ordering code. Up to 700 mA (VOUT ≥ 1.8 V) / 500 mA (VOUT ≥ 0.8 V). Requires a 1 µF ceramic COUT to VSS; internal current limit and short-circuit protection to ~100 mA short current. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-23-5L |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `CJ6211B28MM`+- `CJ6211B28MN`+- `CJ6211B28MF`++## CAD (KiCad official)++- Symbol: `CJ6211B28M`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj6211b28m-datasheet.pdf) (11 pp, sha256 `805289572b9842e1`, 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/cj6211b28m-datasheet.pdf)

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