# IP5306-I2C

**INJOINIC** · Battery Management · ESOP-8

IP5306-I2C from INJOINIC, in a ESOP-8. 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 | VIN | power_in | DC 5 V charger input pin; the recommended input range is 4.75 V to 5.5 V (typ. 5 V) and the absolute maximum port input range is -0.3 V to 5.5 V. |
| 2 | LED1 | output | LED drive pin for battery-level indicator D1 (the first of the 1 to 4 LED display outputs). |
| 3 | LED2 | output | LED drive pin for battery-level indicator D2 (the second of the 1 to 4 LED display outputs). |
| 4 | LED3 | output | LED drive pin for battery-level indicator D3 (the third of the 1 to 4 LED display outputs); LED display driver current is stated as 25 mA. |
| 5 | KEY | input | Pushbutton input shared with the light (flashlight) LED driver; leave floating when no key is used, a press of 30 ms to 2 s is a short press that turns on boost and the level display, and a press longer than 2 s toggles the light LED. |
| 6 | BAT | power_in | Boost input pin connected to the positive terminal of the lithium battery; the stated battery operating voltage range is 3.0 V to 4.4 V. |
| 7 | SW | passive | DC-DC switching node pin for the single inductor that performs both buck charging and boost conversion. |
| 8 | VOUT | power_out | 5 V boost output pin; the datasheet gives a DC output of 5.0 V at VBAT = 3.7 V with a rated load current of 2.4 A. |
| 9 | GND | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | INJOINIC |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `IP5306-I2C`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `ip5306-i2c-etched.step` / `ip5306-i2c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ip5306-i2c.step` / `ip5306-i2c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [INJOINIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884754104266752) (20 pp, sha256 `4d41b8ec5b028085`, retrieved 2026-10-09, 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/ip5306-i2c-datasheet.pdf)