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UZ1085L-AD-TQ2-R

UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-2

UZ1085L-AD-TQ2-R from UTC Unisonic Tech, in a TO-263-2. 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	ADJ	passive	Adjust pin of the adjustable UZ1085-AD; the reference voltage is 1.25V typical (1.225V to 1.275V), and the adjust pin current is 35μA typical and 120μA maximum.
2	VOUT	power_out	Regulated output terminal of the 3A low-dropout regulator.
3	VIN	power_in	Input supply terminal; the absolute maximum input voltage is 18V, and the dropout voltage is 1.30V typical and 1.40V maximum at 3A.

Key specifications

Parameter	Value
Manufacturer	UTC Unisonic Tech
Package	TO-263-2
Category	Power Management (PMIC)
Pins	3

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Reference Voltage	VREF	1.225	1.25	1.275	V	1.5V≤(VIN - VOUT) ≤8.25V,10mA≤IOUT≤3A	3
Ripple Rejection	RR	60	72		dB	f=120Hz,Tantalum,(VIN-VOUT)=3V IOUT=3A	3
Current Limit	ILIMIT	3.1		4	A	(VIN-VOUT)=2V	3
Line Regulation	△VOUT		0.005	0.2	%	(VOUT +1.5V) ≤VIN≤12V, IOUT=10mA	3
Load Regulation	△VOUT		0.05	0.5	%	(VIN - VOUT)=3V, 10mA≤IOUT≤3A	3
Dropout Voltage	VD		1.3	1.4	V	△VREF%=1%, lOUT=3A	3
Adjust Pin Current	IADJ		35	120	μA		3
Adjust Pin Current Change	△IADJ		0.2	5	μA	1.5V≤ (VIN - VOUT) ≤12V, 10mA≤IOUT≤3A	3
Minimum Load Current	IO(MIN)			10	mA	1.5V≤ (VIN-VOUT) ≤12V	3
Quiescent Current	IQ		4	13	mA	VIN=12V	3
Thermal Regulation			0.004	0.02	%/W	TA=25°C,30ms pulse	3
Temperature Stability	VOUT			0.5	%		3
Long-Term Stability	VOUT		0.03	1	%	TA=125°C, 1000hr	3
Output Noise (% of VOUT)	eN		0.003		%	TA=25°C,10Hz≤f≤10kHz	3
Thermal Shutdown			150		°C		3
Input Voltage	VIN			18	V		3
Junction Temperature	TJ			125	°C		3
Operating Temperature	TOPR	-40		125	°C		3
Storage Temperature	TSTG	-40		150	°C		3
Junction to Ambient (TO-263)	θJA		62		°C/W		3
Junction to Case (TO-263)	θJC		4		°C/W		3

CAD (KiCad official)

Symbol: UZ1085L-AD-TQ2-R
Footprint: Package_TO_SOT_SMD:TO-263-2
3D model: TO-263-2 (KiCad packages3D, STEP)
3D model files: uz1085l-ad-tq2-r-etched.step / uz1085l-ad-tq2-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uz1085l-ad-tq2-r.step / uz1085l-ad-tq2-r.glb are the bare package body.

Provenance

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

Datasheet: UTC Unisonic Tech datasheet (7 pp, sha256 08db58c8a2cd7b28, retrieved 2026-10-18, 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