# CL4057A

**ChipLink Tech** · Battery Management ICs · SOT-23-6

CL4057A from ChipLink Tech, in a SOT-23-6. 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 | CHRG | tri_state | Open-drain charging status indicator output; pulled low during active charging, otherwise high-impedance. |
| 2 | GND | power_in | Ground terminal. |
| 3 | BAT | power_out | Battery terminal providing up to 500mA constant-current charging at 4.24V ±1% regulated float voltage. |
| 4 | VCC | power_in | Power supply input with required operating range 4.0V to 6.5V. |
| 5 | STDBY | tri_state | Open-drain charging completion indicator output; pulled low when charging complete, otherwise high-impedance. |
| 6 | PROG | input | Programming resistor to ground connection for setting charging current via voltage monitoring at 0.93V to 1.07V during constant-current charging. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ChipLink Tech |
| Package | SOT-23-6 |
| Category | Power Supply Chip |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `CL4057A`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `cl4057a-etched.step` / `cl4057a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cl4057a.step` / `cl4057a.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/8589838644388126720) (9 pp, sha256 `9bec72c291d3c199`, retrieved 2026-09-17, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/cl4057a-datasheet.pdf)