IP5189T 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	output	LED battery-level indicator driver pin L2 (2-20 mA sink/source, typ 10 mA).
2	L3	output	LED battery-level indicator driver pin L3 (2-20 mA sink/source, typ 10 mA).
3	VDD	power_out	Internal LDO output, 3.1V. Bypass to ground with a decoupling capacitor.
4	VTHS	input	Battery chemistry / cell platform selection input (selects 4.2V / 4.35V / 4.4V CV target).
5	RSET	input	Battery internal-resistance compensation pin; sets fuel-gauge curve fine-trim via external resistor.
6	NTC	input	Battery NTC thermistor sense input for temperature protection during charging.
7	AGND	power_in	Analog ground reference.
8	KEY	input	Pushbutton input (active low to GND). Short press (>80ms, <2s) turns on boost/LED display; double short press within 1s turns off boost and lights; long press (>2s) toggles flashlight LED.
9	VBAT	power_in	Boost input / Li-ion battery positive terminal (3.0-4.4V operating). Also acts as charger output to battery.
10	NC	unconnected	No connect. Leave floating or tie per PCB layout.
11	ICHG	input	External resistor sets charge current per ICHG = 1.2V / R * 100000 (e.g. 120kΩ→1A, 56kΩ→2.1A, NC→default 1.8A).
12	PGND	power_in	Power ground return for the DC-DC switch stage.
13	LX	passive	DCDC switch node. Pins 13, 14, 15 are tied together and connect to the 1µH boost/charge inductor.
14	LX	passive	DCDC switch node (parallel with pins 13, 15).
15	LX	passive	DCDC switch node (parallel with pins 13, 14).
16	VOUT	power_out	5V boost output (5.0-5.15V @ 2.1A, up to 2.1A continuous). Pins 16, 17 tied together for USB Type-A output.
17	VOUT	power_out	5V boost output (parallel with pin 16).
18	DP	bidirectional	USB Type-A output D+ line; used for DCP handshake / adapter recognition on the output port.
19	DM	bidirectional	USB Type-A output D- line; used for DCP handshake / adapter recognition on the output port.
20	VIN	power_in	5V USB charging input (4.65-5.5V, up to 2.2A). Pins 20, 21 tied together for Micro-B/Type-C VBUS input.
21	VIN	power_in	5V USB charging input (parallel with pin 20).
22	LIGHT	output	Flashlight LED driver, open-drain output (typ 30 mA sink). Toggled by long-press on KEY.
23	VSET	input	Battery-type / LED display count configuration input.
24	L1	output	LED battery-level indicator driver pin L1 (2-20 mA sink/source, typ 10 mA).
25	GND	power_in	Exposed thermal pad (EPAD). Power ground and heatsink; must be soldered to the PCB GND plane for thermal dissipation.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

IP5189T
IP5189T_YYY

CAD (KiCad official)

Symbol: IP5189T
Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)

Provenance

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

Datasheet: INJOINIC datasheet (15 pp, sha256 a13a7ce16e0c1601, 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