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Generated by kicad-footprint-generator · KiCad file format 20260206

Name	Last commit message	Last updated
docs	Publish 0.1.0 · Ray	26d ago
viewers	lp8543sq: viewers · Ray	26d ago
lp8543sq-etched.glb	lp8543sq: factory component page (tier=lcsc) · Ray	26d ago
lp8543sq-etched.step	lp8543sq: factory component page (tier=lcsc) · Ray	26d ago
lp8543sq-hero.glb	lp8543sq: hero GLB from the etched model (keeps the MPN mark) · Ray	26d ago
lp8543sq-hero.overlay.json	Publish 0.1.0 · Ray	26d ago
lp8543sq.glb	Publish 0.1.0 · Ray	26d ago
lp8543sq.kicad_mod	Publish 0.1.0 · Ray	26d ago
lp8543sq.kicad_sym	Publish 0.1.0 · Ray	26d ago
lp8543sq.lbr	Publish 0.1.0 · Ray	26d ago
lp8543sq.step	Publish 0.1.0 · Ray	26d ago
package.json	Publish 0.1.0 · Ray	26d ago
page.json	Set visibility: public · Ray	26d ago
README.md	Publish 0.1.0 · Ray	26d ago

LP8543SQ

Texas Instruments · Global Sourcing Parts · WQFN-24-EP(4x4)

LP8543SQ from Texas Instruments, in a WQFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	GND_SW	power_in	Boost ground.
2	PWM	input	PWM dimming input; this pin must be connected to GND if not used.
3	IF_SEL	input	Serial interface mode selection: Low selects the I2C-compatible interface and High selects the SMBus interface.
4	EN	input	Enable input pin.
5	ALSI	input	Ambient light sensor frequency input; this pin must be connected to GND if ALS is not used.
6	ALSO	output	Ambient light sensor enable output.
7	FAULT	output	Fault indication output, open-drain (OD) type.
8	VDDIO	power_in	Digital IO reference voltage, 1.65V to 5.5V as printed in the pin table; needed in SMBus/I2C and stand-alone mode.
9	GND_S	power_in	Signal ground.
10	SCLK	input	Serial clock; this pin must be connected to GND if not used.
11	SDA	bidirectional	Serial data; this pin must be connected to GND if not used.
12	OUT1	passive	Current sink output.
13	OUT2	passive	Current sink output.
14	OUT3	passive	Current sink output.
15	GND_L	power_in	Ground for current sink outputs.
16	OUT4	passive	Current sink output.
17	OUT5	passive	Current sink output; can be left floating if not used.
18	OUT6	passive	Current sink output; can be left floating if not used.
19	OUT7	passive	Current sink output; can be left floating if not used.
20	ADR	input	Serial interface address selection; this pin must be connected to GND if not used.
21	FB	passive	Boost feedback input.
22	VLDO	power_out	LDO output voltage; a 470 nF capacitor should be connected to this pin.
23	VIN	power_in	Input power supply, 5.5V to 22V.
24	SW	passive	Boost switch.
25	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	WQFN-24-EP(4x4)
Category	Global Sourcing Parts
Pins	25

CAD (KiCad official)

Symbol: LP8543SQ
Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
3D model: WQFN-24-EP(4x4) (KiCad packages3D, STEP)
3D model files: lp8543sq-etched.step / lp8543sq-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp8543sq.step / lp8543sq.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (43 pp, sha256 79e09fe108595935, retrieved 2026-10-11, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF