LP5018RSMR from Texas Instruments, in a VQFN-32-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	OUT0	output	Current sink output 0 for driving an LED cathode. Can be left floating if unused. Sinks up to 25.5 mA typ (35 mA when VCC >= 3.3 V) under 12-bit PWM control.
2	OUT1	output	Current sink output 1 for driving an LED cathode. Can be left floating if unused.
3	OUT2	output	Current sink output 2 for driving an LED cathode. Can be left floating if unused.
4	OUT3	output	Current sink output 3 for driving an LED cathode. Can be left floating if unused.
5	OUT4	output	Current sink output 4 for driving an LED cathode. Can be left floating if unused.
6	OUT5	output	Current sink output 5 for driving an LED cathode. Can be left floating if unused.
7	OUT6	output	Current sink output 6 for driving an LED cathode. Can be left floating if unused.
8	OUT7	output	Current sink output 7 for driving an LED cathode. Can be left floating if unused.
9	OUT8	output	Current sink output 8 for driving an LED cathode. Can be left floating if unused.
10	OUT9	output	Current sink output 9 for driving an LED cathode. Can be left floating if unused.
11	OUT10	output	Current sink output 10 for driving an LED cathode. Can be left floating if unused.
12	OUT11	output	Current sink output 11 for driving an LED cathode. Can be left floating if unused.
13	OUT12	output	Current sink output 12 for driving an LED cathode. Can be left floating if unused.
14	OUT13	output	Current sink output 13 for driving an LED cathode. Can be left floating if unused.
15	OUT14	output	Current sink output 14 for driving an LED cathode. Can be left floating if unused.
16	OUT15	output	Current sink output 15 for driving an LED cathode. Can be left floating if unused.
17	OUT16	output	Current sink output 16 for driving an LED cathode. Can be left floating if unused.
18	OUT17	output	Current sink output 17 for driving an LED cathode. Can be left floating if unused.
19	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT18).
20	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT19).
21	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT20).
22	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT21).
23	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT22).
24	NC	unconnected	No internal connection. On LP5018 this pin is not bonded (LP5024 uses this position for OUT23).
25	ADDR0	input	I2C slave-address selection pin (LSB of address select). Must not be left floating; tie to GND or VCC to choose one of up to 4 addresses when combined with ADDR1.
26	ADDR1	input	I2C slave-address selection pin (MSB of address select). Must not be left floating; tie to GND or VCC to choose one of up to 4 addresses when combined with ADDR0.
27	VCC	power_in	Input power supply, 2.7 V to 5.5 V. Bypass locally with a ceramic capacitor (CVCC).
28	SDA	bidirectional	I2C bus data line, up to 400 kHz Fast-mode. Requires an external pull-up. Compatible with 1.8 V / 3.3 V / 5 V logic. If unused, must be tied to GND or VCC.
29	SCL	input	I2C bus clock line, up to 400 kHz Fast-mode. Requires an external pull-up. Compatible with 1.8 V / 3.3 V / 5 V logic. If unused, must be tied to GND or VCC.
30	EN	input	Chip enable input. Drive high to enable the device; drive low to enter shutdown mode (1 uA max IQ). All LEDs turn off within 30 ms of EN going low.
31	IREF	passive	Output current-reference global-setting pin. Connect an external resistor (RREF) from IREF to GND to set the full-scale sink current for all OUTx channels.
32	VCAP	passive	Internal LDO output. Must be bypassed to GND with a 1 uF ceramic capacitor placed as close to the device as possible. Do not load externally.
33	GND	power_in	Exposed thermal pad; also serves as the device ground pin. Must be soldered to the PCB ground plane for both electrical return and thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VQFN-32-EP(4x4)
Category	LED-drv
Pins	33

Ordering variants

Same part, different packaging or reel option.

LP5018RSMR
LP5018RSMRRSMT

CAD (KiCad official)

Symbol: LP5018RSMR
Footprint: Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm
3D model: VQFN-32-EP(4x4) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lp5018rsmr.step`	76 KB	You want the bare part, or you mark your own boards.
`lp5018rsmr-etched.step`	1.8 MB	You want the part with `LP5018RSMR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 441 faces against 72 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: Texas Instruments datasheet (54 pp, sha256 037cc4ded68a9f65, 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