# JSM2019-1.8YN5G

**JSMSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

JSM2019-1.8YN5G from JSMSEMI, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Input of supply voltage, operating range 2.3V to 6V. |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable control input; pulling it low puts the regulator in shutdown mode (about 100nA typical shutdown current). |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Regulator output (1.8V fixed for the JSM2019-1.8 variant), up to 300mA load current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `JSM2019-1.8YN5G`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `jsm2019-1-8yn5g-etched.step` / `jsm2019-1-8yn5g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jsm2019-1-8yn5g.step` / `jsm2019-1-8yn5g.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [JSMSEMI datasheet](docs/jsm2019-1-8yn5g-datasheet.pdf) (9 pp, sha256 `2127e86d62f9a710`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/jsm2019-1-8yn5g-datasheet.pdf)