IP5219 from INJOINIC, in a QFN-24-EP(4x4). 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	L2/SDA	bidirectional	Battery indicator LED2 drive pin; alternate function is I2C SDA data line when I2C interface is enabled.
2	L3	output	Battery indicator LED3 drive pin (LED SOC indicator). Datasheet text says 'Battery indicator pin2' but pin 2 is L3 in the diagram - likely a typo for pin3.
3	VREG	power_out	Internal 3.1V LDO regulator output. Provides ~3.1V rail used by internal analog blocks and the CC pull-up resistor network.
4	VTHS	input	Battery OCV (open-circuit voltage) select input - used with an external resistor to configure the battery voltage threshold.
5	RSET	input	Battery internal-resistance select input - sets the assumed battery ESR via an external resistor for SOC estimation.
6	NTC	input	Battery NTC thermistor sense input for battery temperature protection during charge/discharge.
7	AGND	power_in	Analog ground reference for internal analog blocks. Connect to the main ground plane at a single point.
8	KEY	input	Push-button key input. A short press wakes the device / turns on LED indicator; long-press toggles torch/LIGHT function.
9	BAT	power_in	Battery voltage sense and charge/discharge pin. Connects to the Li-ion cell positive terminal (charge output / boost input, VBAT 3.0-4.4V).
10	CC1	bidirectional	USB TYPE-C CC1 configuration channel - used for DRP source/sink detection with internal Rp/Rd network.
11	CC2	bidirectional	USB TYPE-C CC2 configuration channel - used for DRP source/sink detection with internal Rp/Rd network.
12	PGND	power_in	Power ground return for the boost/charge switching stage. Connect via a low-impedance path to the input/output caps.
13	LX	power_out	DC-DC switching node - connects to the external 1µH inductor shared by the synchronous charger and boost converter.
14	LX	power_out	DC-DC switching node (paralleled with pins 13,15) - connect to inductor.
15	LX	power_out	DC-DC switching node (paralleled with pins 13,14) - connect to inductor.
16	VOUT	power_out	DC-DC boost 5V output pin. Delivers up to 2.4A to USB-A / TYPE-C load; decouple with bulk + ceramic capacitors.
17	VOUT	power_out	DC-DC boost 5V output pin (paralleled with pin 16).
18	TC1	output	VBUS charge-input PMOS gate control pin (channel 1) - drives external/back-to-back PMOS used for input path switching.
19	TC2	output	VBUS charge-input PMOS gate control pin (channel 2) - drives external/back-to-back PMOS used for input path switching.
20	VIN	power_in	Charger 5V input pin (from VBUS via TYPE-C / MicroUSB). Recommended 4.75-5.5V.
21	VIN	power_in	Charger 5V input pin (paralleled with pin 20).
22	LIGHT	output	LED torch/flashlight driver - open-drain output for driving a torch LED (up to ~30 mA typ).
23	VSET	input	Battery target-voltage select input - configures target charge voltage (4.20/4.35/4.40V) via external resistor / strap.
24	L1/SCK	bidirectional	Battery indicator LED1 drive pin; alternate function is I2C SCK clock line when I2C interface is enabled (Datasheet labels this SCK though standard I2C is SCL).
25	GND	power_in	Exposed thermal pad (EPAD) - must be soldered to PCB ground plane for thermal dissipation and electrical ground.

Key specifications

Parameter	Value
Manufacturer	INJOINIC
Package	QFN-24-EP(4x4)
Category	PMIC
Pins	25

CAD (KiCad official)

Symbol: IP5219
Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ip5219.step`	277 KB	You want the bare part, or you mark your own boards.
`ip5219-etched.step`	1.5 MB	You want the part with `IP5219` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 392 faces against 158 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: INJOINIC datasheet (20 pp, sha256 b823e8324ee2c179, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF