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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

QX7136

QX Micro Devices · LED Drivers · SOT-89-5

QX7136 from QX Micro Devices, in a SOT-89-5. 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	CS	input	Current setting pin; LED current is set by ILED = VCS/RCS with VCS typically 50mV (47mV to 53mV).
2	GND	power_in	Chip ground; keep the RCS return trace to ground thick and short to reduce output current error.
3	VDD	power_in	Chip power supply, 2.7V to 5.2V operating range with internal clamp at about 5.4V and UVLO at 2.5V typical; place a ~4.7uF capacitor close to this pin.
4	DRV	output	Gate drive output for an external NMOS transistor; absolute maximum voltage 7V.
5	LED	input	Drain terminal of the internal NMOS, which supports 10mA to 1000mA output current at VIN=3.6V.

Key specifications

Parameter	Value
Manufacturer	QX Micro Devices
Package	SOT-89-5
Category	Display Modules / LED Drivers / Display Drivers
Pins	5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply voltage range	VIN	2.7		5.2	V	ILED =350mA	4
Undervoltage lockout threshold	VUVLO	2.3	2.5	2.7	V	ILED =350mA, VIN decreasing	4
Output current range, external NMOS	ILED	100		3000	mA	External NMOS, VIN =3.6V	5
Output current range, internal NMOS	ILED	10		1000	mA	Internal NMOS, VIN =3.6V	5
Output current accuracy	ΔILED/ILED	-6		6	%	ΔVO greater than 100mV	5
CS voltage	VCS	47	50	53	mV	Chip operating normally	5
Maximum voltage on VDD, DRV and CS pins	VMAX			7	V	VDD, DRV and CS pins	4
Maximum power dissipation SOT-89-5	PSOT-89-5			0.5	W	SOT-89-5 package	4
Operating temperature range	TA	-20		85	°C		4
Storage temperature range	TSTG	-40		120	°C		4
Soldering temperature	TSD	230		240	°C	Time less than 30 seconds	4
ESD voltage (HBM)	VESD			2000	V	Human body model	4
Internal clamp voltage	VZN		5.4		V		4
Quiescent current	IDDQ		100		uA	VIN =5.0V	4
Dropout voltage, external NMOS	ΔVO		150		mV	Output current 1.4A, external NMOS AP2306	4
Dropout voltage, internal NMOS	ΔVO		100		mV	Output current 350mA, internal NMOS	4
Over-temperature protection threshold	TOTP		120		°C		4
Load regulation			2		mA/V	VIN =3.6V, VLED from 0.2V to 3.0V	5
Line regulation			2		mA/V	VIN from 3.0V to 5.0V	5

CAD (KiCad official)

Symbol: QX7136
Footprint: Package_TO_SOT_SMD:SOT-89-5
3D model: SOT-89-5 (KiCad packages3D, STEP)
3D model files: qx7136-etched.step / qx7136-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); qx7136.step / qx7136.glb are the bare package body.

Provenance

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

Datasheet: QX Micro Devices datasheet (8 pp, sha256 94222d6406d33cb6, retrieved 2026-10-22, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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