# IP5306-LC

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

IP5306-LC 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 | DC5V charging input pin; recommended input range is 4.75 V to 5.5 V (typical 5 V), with an absolute maximum of -0.3 V to 5.5 V. |
| 2 | LED1 | output | LED drive pin for the battery-level indicator, driving segment D1. |
| 3 | LED2 | output | LED drive pin for the battery-level indicator, driving segment D2. |
| 4 | LED3 | output | LED drive pin for the battery-level indicator, driving segment D3. |
| 5 | KEY | input | Button input that is multiplexed with the light drive; leave it floating when no button is used, a press of 30 ms to 2 s turns on the level display and boost output, 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, with a stated battery operating voltage of 3.0 V to 4.4 V. |
| 7 | SW | passive | DC-DC switching pin that connects to the single boost/charge inductor. |
| 8 | VOUT | power_out | 5 V boost output pin, giving 5.0 V DC output at VBAT=3.7 V with a stated output current capability of 2.4 A. |
| 9 | PowerPAD | 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 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Port input voltage range | VIN | -0.3 |  | 5.5 | V |  | 4 |
| Junction temperature range | TJ | -40 |  | 150 | ℃ |  | 4 |
| Storage temperature range | Tstg | -60 |  | 150 | ℃ |  | 4 |
| ESD human body model (HBM) | ESD |  |  | 4 | KV |  | 4 |
| Input voltage (recommended operating) | VIN | 4.75 | 5 | 5.5 | V |  | 4 |
| Load current (recommended operating) | I | 0 | 2.4 | 3 | A |  | 4 |
| Operating ambient temperature | TA | 0 |  | 70 | ℃ |  | 4 |
| Input voltage | VIN | 4.75 | 5 | 5.5 | V |  | 4 |
| Battery operating voltage | VBAT | 3 |  | 4.4 | V |  | 5 |
| Load short-circuit detection time | TOCD |  | 150 | 200 | us | Output current continuously greater than 4A | 5 |
| Thermal resistance, junction to ambient | θJA |  | 50 |  | ℃/W |  | 4 |
| Input operating current | IVIN |  | 2 |  | mA | VIN=5V，fs=750KHz | 4 |
| Input quiescent current |  |  | 100 |  | uA | VIN=5V，Device not switching | 4 |
| Charge target voltage | VTRGT |  | 4.2 |  | V |  | 4 |
| Charge current | ICHRG |  | 2.1 |  | A |  | 4 |
| Charge switching frequency | fs |  | 750 |  | KHz |  | 4 |
| Trickle charge current | ITRKL |  | 100 |  | mA | VIN=5V，BAT=2.7V | 4 |
| Trickle charge cutoff voltage | VTRKL |  | 2.9 |  | V |  | 4 |
| Recharge threshold | VRCH |  | 4.1 |  | V |  | 4 |
| Charge cutoff time | TEND |  | 24 |  | Hour |  | 5 |
| Input undervoltage lockout rising voltage | VUVLO |  | 4.5 |  | V |  | 5 |
| Undervoltage lockout hysteresis | VUVLOH |  | 200 |  | mV |  | 5 |
| Battery input current (switching) | IBAT |  | 3 |  | mA | VBAT=3.7V，VOUT=5.0V，fs=500KHz | 5 |
| Battery input current (not switching) | IBAT |  | 100 |  | uA | VIN=5V，Device not switching | 5 |
| DC output voltage | VOUT |  | 5 |  | V | VBAT=3.7V | 5 |
| Output voltage ripple | ΔVOUT |  | 50 |  | mV | VBAT=3.7V，VOUT=5.0V，fs=500KHz | 5 |
| Boost switching frequency | fs |  | 500 |  | KHz |  | 5 |
| Boost system supply current | Ivout |  | 2.4 |  | A |  | 5 |
| Load overcurrent detection time | TUVD |  | 30 |  | ms | Output voltage continuously below 4.4V | 5 |
| PMOS on-resistance | rDSON |  | 35 |  | mΩ |  | 5 |
| NMOS on-resistance |  |  | 30 |  | mΩ |  | 5 |
| Battery input standby current | ISTB |  | 50 |  | uA | VIN=0V，VBAT=3.7V | 5 |
| LED lighting drive current (Key) |  |  | 25 |  | mA |  | 5 |
| LED display drive current | IL1, IL2, IL3 |  | 25 |  | mA |  | 5 |
| Load auto-detect time | TloadD |  | 32 |  | s | Load current continuously less than 45mA | 5 |
| Short key-press wake debounce time | TOnDebounce |  | 50 |  | ms |  | 5 |
| Light-on time | TKeylight |  | 2 |  | s |  | 5 |
| Thermal shutdown temperature | TOTP |  | 125 |  | ℃ | Rising temperature | 5 |
| Thermal shutdown hysteresis | ΔTOTP |  | 40 |  | ℃ |  | 5 |

## CAD (KiCad official)

- Symbol: `IP5306-LC`
- 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-lc-etched.step` / `ip5306-lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ip5306-lc.step` / `ip5306-lc.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/8588907133374619648) (11 pp, sha256 `37afe4236569af20`, 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/ip5306-lc-datasheet.pdf)