IP2332 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	NTC	input	Battery temperature sense input. Connect an external negative temperature coefficient (NTC) thermistor from this pin to GND to monitor battery temperature; supports a 5-segment JEITA-compatible charge profile.
2	ISET	input	Charge current programming pin. Connect a resistor R_ISET from this pin to GND to set constant-current charge level (e.g. 1.4kΩ→2.4A, 2.4kΩ→1.5A, 4.3kΩ→1A; leave NC or ≥120kΩ for ~2A default).
3	LED2	output	LED2 status indicator output (general-purpose IO drive). Drives a status LED; drive current up to 5mA.
4	LED1	output	LED1 status indicator output with built-in constant-current drive and breathing-light mode (no external current-limit resistor required). Drive current up to 5mA.
5	BAT	power_out	Battery connection. Connect to the positive terminal of the single-cell Li-ion battery being charged. Regulated float voltage 4.2V standard (custom 3.5V-4.4V for LiFePO4/other chemistries).
6	LX	output	DC-DC switching node. Connect the external buck inductor (2.2µH typ) between this pin and the BAT-side output capacitor. Switching frequency 500kHz.
7	GND	power_in	Ground reference. Tie to system ground; connect together with the exposed thermal pad.
8	VIN	power_in	5V DC input supply. Recommended operating range 4.5V-6V; UVLO ~4.3V, OVP ~6V (200mV hysteresis). Bypass with a ceramic capacitor to GND.
9	GND	power_in	Exposed thermal pad (EPAD) on package underside. Must be soldered to the PCB ground plane for both electrical ground and heat dissipation.

Key specifications

Parameter	Value
Manufacturer	INJOINIC
Package	ESOP-8
Category	PMIC
Pins	9

CAD (KiCad official)

Symbol: IP2332
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ip2332.step`	125 KB	You want the bare part, or you mark your own boards.
`ip2332-etched.step`	1.7 MB	You want the part with `IP2332` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 411 faces against 152 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 (18 pp, sha256 fc378518a3665f60, retrieved 2026-08-17, 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: 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