IP6538-AC from INJOINIC, in a QFN-32-EP(5x5). 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	VOUT1G	output	Gate drive to control external NMOS on VOUT1 output path (load-switch / plug-detection MOSFET).
2	VOUT2G	output	Gate drive to control external NMOS on VOUT2 output path (load-switch / plug-detection MOSFET).
3	VOUT2	input	VOUT2 output plug-in detection sense pin (senses port-2 downstream voltage for auto plug detection).
4	NC	unconnected	Floating pin, do not connect.
5	CCB1	bidirectional	Type-C port 2 CC1 line (Group B). PD/BMC communication and CC attach detection. Abs max 30V; OVP triggers >6.5V.
6	CCB2	bidirectional	Type-C port 2 CC2 line (Group B). PD/BMC communication and CC attach detection. Abs max 30V; OVP triggers >6.5V.
7	CCA1	bidirectional	Type-C port 1 CC1 line (Group A). Note: on IP6538-AC VOUT1 is USB Type-A, so CCA pins are typically unused on this variant. Abs max 30V; OVP >6.5V.
8	CCA2	bidirectional	Type-C port 1 CC2 line (Group A). See CCA1 note for IP6538-AC. Abs max 30V; OVP >6.5V.
9	DM2	bidirectional	VOUT2 USB D- line. Used for BC1.2/Apple/Samsung/QC/FCP/AFC/PE handshake. Abs max 30V; DPDM OVP triggers >4.8V.
10	DP2	bidirectional	VOUT2 USB D+ line. Fast-charge protocol handshake. Abs max 30V; DPDM OVP >4.8V.
11	DP1	bidirectional	VOUT1 USB D+ line. Fast-charge protocol handshake. Abs max 30V; DPDM OVP >4.8V.
12	DM1	bidirectional	VOUT1 USB D- line. Fast-charge protocol handshake. Abs max 30V; DPDM OVP >4.8V.
13	GND	power_in	Analog / signal ground reference.
14	VIN	power_in	Buck-converter power input. Operating 8.2V-32V, absolute max 40V. Tie all VIN pins (14,15,26,27) together with local bulk + HF decoupling.
15	VIN	power_in	Buck-converter power input (parallel with pin 14). Operating 8.2V-32V, absolute max 40V.
16	HLED	output	Fast-charge state indicator LED drive. Open-drain style drive for a status LED (asserted while fast-charge protocol is active).
17	NC	unconnected	Floating pin, do not connect.
18	PGND	power_in	Power ground return for the buck-stage low-side FET. Connect to the ground pour with short, wide copper adjacent to input caps.
19	LX	power_out	DCDC switch node; connect to buck inductor. Swings from PGND to VIN. Abs max -0.3V to VIN+0.3V. Tie all LX pins (19-23) together.
20	LX	power_out	DCDC switch node (parallel with pin 19). Connect to inductor.
21	LX	power_out	DCDC switch node (parallel). Connect to inductor.
22	LX	power_out	DCDC switch node (parallel). Connect to inductor.
23	LX	power_out	DCDC switch node (parallel). Connect to inductor.
24	BST	passive	Bootstrap capacitor node for the high-side NMOS gate driver. Typical 100nF bootstrap cap between BST and LX.
25	PGND	power_in	Power ground return (parallel with pin 18).
26	VIN	power_in	Buck-converter power input (parallel with pins 14/15/27).
27	VIN	power_in	Buck-converter power input (parallel with pins 14/15/26).
28	NC	unconnected	Floating pin, do not connect.
29	VOS1	input	VOUT1 output-current negative-sense pin. Connect across a 10mOhm alloy sense resistor between VOUT and VOS1 to set port-1 current limit and enable line compensation.
30	VOS2	input	VOUT2 output-current negative-sense pin. Connect across a 10mOhm alloy sense resistor between VOUT and VOS2 to set port-2 current limit and enable line compensation.
31	VOUT	input	Shared VOUT1/VOUT2 output-current positive-sense pin. Kelvin-connect to the buck output rail at the high side of the 10mOhm sense resistors.
32	VOUT1	input	VOUT1 output plug-in detection pin (senses port-1 downstream voltage for auto plug detection).
33	EPAD	power_in	Exposed thermal pad on the underside of the QFN. Must be soldered to the ground pour for thermal dissipation and electrical return.

Key specifications

Parameter	Value
Manufacturer	INJOINIC
Package	QFN-32-EP(5x5)
Category	PMIC
Pins	33

Ordering variants

Same part, different packaging or reel option.

IP6538-AC
IP6538-ACCC
IP6538-ACAA

CAD (KiCad official)

Symbol: IP6538-AC
Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)

Provenance

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

Datasheet: INJOINIC datasheet (17 pp, sha256 1654a7432120a048, 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