# PT4054

**PUOLOP** · Battery Management · SOT-23-5L

PT4054 from PUOLOP, in a SOT-23-5L. 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 | CHRG | output | Open-drain charge status output: an internal N-channel MOSFET pulls it low during charging, a weak ~20uA pulldown indicates AC present when the charge cycle ends, and it is forced high-impedance during undervoltage lockout. |
| 2 | GND | power_in | Ground pin. |
| 3 | BAT | power_out | Charge current output to the battery that regulates the final float voltage to 4.2V through a precision internal resistor divider, which is disconnected in shutdown mode; BAT pin current is rated to 800mA. |
| 4 | VCC | power_in | Positive input supply, specified at 4.25V to 6.5V and to be bypassed with at least one 1uF capacitor; the device enters shutdown and drops Ibat below 2uA when VCC falls to within 30mV of the BAT pin voltage. |
| 5 | PROG | passive | Charge current set, monitor and shutdown pin: a 1% resistor to GND sets Ibat = (Vprog/Rprog)x1000, the pin is held at 1V in constant-current mode, and the charger shuts down when the pin reaches the 1.22V threshold (PROG pin current rated to 800uA). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PUOLOP |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| 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 supply voltage range (as printed) |  | 4.5 |  | 6 | V |  | 2 |
| VCC supply voltage range | VCC | 4.25 |  | 6.5 | V |  | 2 |
| PROG pin voltage | PROG | -0.3 |  |  | V | Maximum printed as VCC+0.3V, not a fixed number | 2 |
| BAT pin voltage | BAT | -0.3 |  | 7 | V |  | 2 |
| CHRG pin voltage | CHRG | -0.3 |  | 10 | V |  | 2 |
| BAT pin current |  |  |  | 800 | mA |  | 2 |
| PROG pin current |  |  |  | 800 | uA |  | 2 |
| Maximum junction temperature |  |  |  | 145 | ℃ |  | 2 |
| Operating ambient temperature range |  | 0 |  | 85 | ℃ |  | 2 |
| Storage temperature range |  | -65 |  | 125 | ℃ |  | 2 |
| Lead temperature (soldering) |  |  |  | 260 | ℃ | Soldering time 10s | 2 |
| Battery drain current with input removed | Ibat |  |  | 2 | uA | Input power (AC adapter or USB) removed | 1 |

## CAD (KiCad official)

- Symbol: `PT4054`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `pt4054-etched.step` / `pt4054-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pt4054.step` / `pt4054.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PUOLOP datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911717837377536) (7 pp, sha256 `8955c6e22667d936`, 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/pt4054-datasheet.pdf)