component
AP2139AK-2.8TRG1
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Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+44@@ -0,0 +1,44 @@+# AP2139AK-2.8TRG1++**Diodes Incorporated AP2139AK 2 8TRG1** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5++AP2139AK-2.8TRG1 from Diodes Incorporated AP2139AK 2 8TRG1, in a SOT-23-5. 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 | Input supply voltage. Recommended operating range 2.5 V to 6.0 V (absolute max 6.6 V). A 1 µF input capacitor is required for stability. |+| 2 | GND | power_in | Device ground reference return for the LDO regulator. |+| 3 | CE | input | Active-high chip enable. Logic high (VIH ≥ 1.2 V) enables the regulator; logic low (VIL ≤ 0.3 V) shuts it down and triggers the AP2139's active quick output discharge. Internal pull-down current ~0.2 µA. Allowed voltage range -0.3 V to VIN+0.3 V. |+| 4 | NC | unconnected | No internal connection. May be left floating or tied to GND. |+| 5 | VOUT | power_out | Regulated 2.8 V output (±2% accuracy), 250 mA maximum output current. Requires a >1 µF output capacitor with ESR 0.01 Ω to 100 Ω (ceramic recommended) for stability. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated AP2139AK 2 8TRG1 |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `AP2139AK-2.8TRG1`++## CAD (KiCad official)++- Symbol: `AP2139AK-2.8TRG1`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated AP2139AK 2 8TRG1 datasheet](https://www.diodes.com/assets/Datasheets/AP2139AK-2.8TRG1.pdf) (29 pp, sha256 `027e80492a5bc199`, retrieved 2026-08-17, tier: manufacturer)+- **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/ap2139ak-2-8trg1-datasheet.pdf)
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