Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Download PDF

Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

LD1085V

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

LD1085V from STMicroelectronics, in a TO-220. 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/GND	passive	Adjust pin on the adjustable LD1085V (reference voltage 1.25 V, adjust pin current 55 µA typ. and 120 µA max.), which is the ground pin on fixed-voltage versions.
2	OUTPUT	power_out	Regulated output delivering up to 3 A, with typical dropout of 1.3 V at 3 A and a 10 µF minimum output capacitor needed for stability.
3	INPUT	power_in	Unregulated input voltage, absolute maximum 30 V DC, with a 10 µF input capacitor used in the datasheet test conditions.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TO-220
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	1.237	1.25	1.263	V	IO = 10 mA, TJ = 25°C	11
Reference voltage	Vref	1.225	1.25	1.275	V	IO = 10 mA to 3 A, VI = 2.85 to 30 V	11
Line regulation	ΔVO		0.015	0.2	%	IO = 10 mA, VI = 2.85 to 16.5 V, TJ = 25°C	11
Line regulation	ΔVO		0.035	0.2	%	IO = 10 mA, VI = 2.85 to 16.5 V	11
Load regulation	ΔVO		0.1	0.3	%	IO = 10 mA to 3 A, TJ = 25°C	11
Load regulation	ΔVO		0.2	0.4	%	IO = 0 to 3 A	11
Dropout voltage	Vd		1.3	1.5	V	IO = 3 A	11
Minimum load current	IO(min)		3	10	mA	VI = 30 V	11
Short-circuit current	Isc		5.5	6.5	A	VI - VO = 5 V	11
Short-circuit current	Isc		0.5	0.7	A	VI - VO = 25 V	11
Thermal regulation			0.003	0.015	%/W	TA = 25°C, 30ms pulse	11
Supply voltage rejection	SVR		60	72	dB	f = 120 Hz, CO = 25 µF, CADJ = 25 µF, IO = 3 A, VI = 6.25 ± 3 V	11
Adjust pin current	IADJ		55	120	µA	VI = 4.25 V, IO = 10 mA	11
Adjust pin current change	ΔIADJ		0.2	5	µA	IO = 10 mA to 3 A, VI = 2.85 to 16.5 V	11
Input voltage DC	VI			30	V		5
Storage temperature range	TSTG	-55		150	°C		5
Operating junction temperature range	TOP	-40		125	°C		5
Thermal resistance junction-case (TO-220)	RthJC		3		°C/W		5
Thermal resistance junction-ambient (TO-220)	RthJA		50		°C/W		5

CAD (KiCad official)

Symbol: LD1085V
Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
3D model: TO-220 (KiCad packages3D, STEP)
3D model files: ld1085v-etched.step / ld1085v-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld1085v.step / ld1085v.glb are the bare package body.

Provenance

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

Datasheet: STMicroelectronics datasheet (27 pp, sha256 8b24eef0a5bb342a, retrieved 2026-10-11, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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