# AOSS21311C

**Alpha Omega Semicon** · MOSFETs · SOT-23-3

AOSS21311C from Alpha Omega Semicon, in a SOT-23-3. 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 | G | input | Gate; controls the P-channel MOSFET with VGS rated ±20V max and typical HBM Class 1C ESD protection. |
| 2 | S | passive | Source; connects to the supply side of the load switch, with continuous drain current rated -4.3A at TA=25°C. |
| 3 | D | passive | Drain; drain-source voltage rated -30V max with pulsed drain current of -17A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Alpha Omega Semicon |
| Package | SOT-23-3 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Breakdown Voltage | BVDSS | -30 |  |  | V | ID=-250mA, VGS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS=-30V, VGS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -5 | μA | TJ=55°C | 2 |
| Gate-Body leakage current | IGSS | -10 |  | 10 | μA | VDS=0V, VGS=±20V | 2 |
| Gate Threshold Voltage | VGS(th) | -1.2 | -1.7 | -2.2 | V | VDS=VGS, ID=-250mA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 37 | 45 | mΩ | VGS=-10V, ID=-4.3A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 52 | 64 | mΩ | TJ=125°C | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 52 | 65 | mΩ | VGS=-4.5V, ID=-3.5A | 2 |
| Diode Forward Voltage | VSD |  | -0.8 | -1 | V | IS=-1A, VGS=0V | 2 |
| Maximum Body-Diode Continuous Current | IS |  |  | -2 | A |  | 2 |
| Gate resistance | Rg |  | 15 | 25 | Ω | f=1MHz | 2 |
| Total Gate Charge (10V) | Qg |  | 12.5 | 23 | nC | VGS=-10V, VDS=-15V, ID=-4.3A | 2 |
| Total Gate Charge (4.5V) | Qg |  | 6 | 12 | nC |  | 2 |
| Drain-Source Voltage | VDS |  |  | -30 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -4.3 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | -3.3 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | -17 | A |  | 1 |
| Power Dissipation | PD |  |  | 1.3 | W | TA=25°C | 1 |
| Power Dissipation | PD |  |  | 0.8 | W | TA=70°C | 1 |
| Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |
| Maximum Junction-to-Ambient | RqJA |  | 70 | 90 | °C/W | t ≤ 10s | 1 |
| Maximum Junction-to-Ambient | RqJA |  | 100 | 125 | °C/W | Steady-State | 1 |
| Maximum Junction-to-Lead | RqJL |  | 63 | 80 | °C/W | Steady-State | 1 |

## CAD (KiCad official)

- Symbol: `AOSS21311C`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `aoss21311c-etched.step` / `aoss21311c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `aoss21311c.step` / `aoss21311c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Alpha Omega Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590361447311450112) (5 pp, sha256 `a0b19e812095ba54`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/aoss21311c-datasheet.pdf)