# IP5305T

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

IP5305T from INJOINIC, in a ESOP-8. 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 | VIN | power_in | 5V input charging pin with recommended operation range 4.65-5.5V and overvoltage threshold at 5.5-5.7V. |
| 2 | LED1 | output | LED display driver pin 1 outputting 2-15mA; selects battery type via pull-down resistor RVSET (43K for 4.3V, 75K for 4.35V, 100K for 4.4V, or floating for 4.2V). |
| 3 | LED2 | output | LED display driver pin 2 outputting 2-15mA; selects charge display threshold via pull-down resistor RVTHS with five configuration levels (20K, 43K, 75K, 100K, or floating). |
| 4 | LED3 | output | LED display driver pin 3 outputting 2-15mA for 3-4 LED display modes. |
| 5 | KEY | input | Key/button input with debounce time 30-100ms; short press (>30ms, <2s) enables display and boost output; long press (>2s) toggles illumination LED; leave floating when not used. |
| 6 | BAT | power_in | Lithium battery positive terminal accepting 3.0-4.4V nominal voltage with low voltage protection threshold at 2.85-3.05V. |
| 7 | SW | output | DC-DC converter switching node connected to external inductor; operates at 250-450KHz (discharge mode) or 600-800KHz (charge mode) with PMOS on-resistance 70-90mΩ and NMOS on-resistance 60-80mΩ. |
| 8 | VOUT | power_out | 5V boosted output pin providing 1.0A maximum output current with regulation voltage 4.75-5.25V and output ripple 20-100mV. |
| 9 | EP | 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: `IP5305T`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `ip5305t-etched.step` / `ip5305t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ip5305t.step` / `ip5305t.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/8589836915102023680) (11 pp, sha256 `210568ac364ef258`, retrieved 2026-09-21, 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/ip5305t-datasheet.pdf)