# CL9906A18F4N

**CHIPLINK(芯联)** · IC · DFN-4(1x1)

CL9906A18F4N from CHIPLINK(芯联), in a DFN-4(1x1). 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 | VOUT | power_out | Regulated output terminal; the absolute VOUT voltage limit is GND-0.3 V to VIN+0.3 V, and output current is up to 250 mA for the A18 (1.8 V) variant. |
| 2 | GND | power_in | Ground terminal of the regulator. |
| 3 | NC | unconnected | No-connect pin (listed as 空脚, empty pin) on the DFN1*1-4 package, so it is left unconnected. |
| 4 | VIN | power_in | Power supply input; the absolute maximum VIN is -0.3 V to +7.0 V and the stated operating input voltage is up to 5.5 V. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CHIPLINK(芯联) |
| Package | DFN-4(1x1) |
| Category |  |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN |  |  | 5.5 | V |  | 5 |
| VIN pin voltage (absolute maximum) | VIN | -0.3 |  | 7 | V |  | 3 |
| VOUT pin current | IOUT |  |  | 500 | mA | Note (1): IOUT ≤ Pd/(VIN-VOUT) | 3 |
| Operating ambient temperature | Topr | -25 |  | 85 | C |  | 3 |
| Storage temperature | Tstg | -40 |  | 125 | C |  | 3 |
| Soldering temperature and time | Tsolder |  |  | 260 | C | 10 s | 3 |
| ESD level, human body model |  |  |  | 4000 | V | Human body model | 3 |
| ESD level, machine model |  |  |  | 400 | V | Machine model | 3 |
| Latch-up level |  |  |  | 400 | mA |  | 3 |
| Output voltage | VOUT | 1.764 | 1.8 | 1.836 | V | VIN=3.3V, IOUT=30mA | 5 |
| Maximum output current | IOUT (max) |  |  | 250 | mA | VIN=3.3V | 5 |
| Load regulation | ΔVOUT |  |  | 15 | mV | VIN=3.3V, 1mA≤IOUT≤100mA | 5 |
| Load regulation | ΔVOUT |  |  | 30 | mV | VIN=3.3V, 1mA≤IOUT≤200mA | 5 |
| Dropout voltage (Vdif1) | Vdif1 |  |  | 70 | mV | IOUT=30mA | 5 |
| Dropout voltage (Vdif2) | Vdif2 |  |  | 240 | mV | IOUT=100mA | 5 |
| Line regulation | ΔVOUT/(ΔVIN*VOUT) |  |  | 0.05 | %/V | IOUT=30mA, 3.3V≤VIN≤7V | 5 |
| Short-circuit current | ISHORT |  |  | 50 | mA | VIN=3.3V | 5 |
| Overcurrent protection current | ILIMIT |  |  | 300 | mA | VIN=3.3V | 5 |
| Quiescent current | IQ |  | 1 |  | uA |  | 5 |

## CAD (KiCad official)

- Symbol: `CL9906A18F4N`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN-4(1x1) (KiCad packages3D, STEP)
- 3D model files: `cl9906a18f4n-etched.step` / `cl9906a18f4n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cl9906a18f4n.step` / `cl9906a18f4n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CHIPLINK(芯联) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757120996208066560) (12 pp, sha256 `933792ac3fa5c996`, retrieved 2026-10-24, 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/cl9906a18f4n-datasheet.pdf)