# CL9901A28S3M

**ChipLink Tech** · Linear Voltage Regulators (LDO) · SOT-23

CL9901A28S3M from ChipLink Tech, in a SOT-23. 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 | GND | power_in | Ground terminal (接地端) of the CL9901 regulator, pin 1 in the SOT-23 package. |
| 2 | VOUT | power_out | Regulator output pin; the datasheet limits VOUT pin voltage to GND-0.3 V to VIN+0.3 V and output current to 500 mA, with the output current derived as Pd/(VIN-VOUT). |
| 3 | VIN | power_in | Power supply input pin; the datasheet rates the VIN pin voltage at -0.3 V to +6.0 V and specifies input voltage up to 6.0 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ChipLink Tech |
| Package | SOT-23 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN pin voltage | VIN | -0.3 |  | 6 | V |  | 3 |
| VOUT pin current | IOUT |  |  | 500 | mA | Note (1): IOUT Pd/(VIN-VOUT) | 3 |
| Maximum power dissipation, SOT23 |  |  |  | 150 | mW | SOT23 package, without PCB heat-sink enhancement | 3 |
| Maximum power dissipation, SOT23 with PCB heat-sink enhancement |  |  |  | 300 | mW | SOT23 package, with PCB heat-sink enhancement (reference only, per note (2)) | 3 |
| Operating ambient temperature | Topr | -25 |  | 85 | C |  | 3 |
| Storage temperature | Tstg | -40 |  | 125 | C |  | 3 |
| Soldering temperature | Tsolder |  |  | 260 | C | 10 s | 3 |

## CAD (KiCad official)

- Symbol: `CL9901A28S3M`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cl9901a28s3m-etched.step` / `cl9901a28s3m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cl9901a28s3m.step` / `cl9901a28s3m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ChipLink Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588954583778906112) (10 pp, sha256 `80814e3270d530b4`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/cl9901a28s3m-datasheet.pdf)