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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

LM317DCYR-HXY

HXY MOSFET · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

LM317DCYR-HXY from HXY MOSFET, in a SOT-223. 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 tied to the internal reference; the datasheet gives reference voltage VREF 1.20 to 1.30 V (1.25 V typ) and adjustable pin current IADJ of 46 µA typ and 100 µA max.
2	VOUT	power_out	Regulated output, adjustable over 1.2 to 37 V and supplying more than 1.5 A of load current, with a maximum output current IO(MAX) of 1.0 A min or 2.2 A typ at TA=25°C per the datasheet table.
3	VIN	power_in	Input supply pin; the input-output differential VI-VO must stay within 3 V to 40 V, with 40 V as the absolute maximum input-output differential.

Key specifications

Parameter	Value
Manufacturer	HXY MOSFET
Package	SOT-223
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
Line Regulation (TA=25℃)	Rline		0.01	0.04	%/V	TA=25℃, 3V≤VI-VO≤40V	2
Line Regulation (over temperature)	Rline		0.02	0.07	%/V	3V≤VI-VO≤40V	2
Load Regulation (VO<5V, TA=25℃)	Rload		18	25	mV	TA=25℃, 10mA≤IO≤IMAX, VO<5V	2
Load Regulation (VO≥5V, TA=25℃)	Rload		0.4	0.5	%VO	TA=25℃, 10mA≤IO≤IMAX, VO≥5V	2
Load Regulation (VO<5V, over temperature)	Rload		40	70	mV	10mA≤IO≤IMAX, VO<5V	2
Load Regulation (VO≥5V, over temperature)	Rload		0.8	1.5	%VO	10mA≤IO≤IMAX, VO≥5V	2
Adjustable Pin Current	IADJ		46	100	µA		2
Adjustable Pin Current Change	ΔIADJ		2	5	µA	3V≤VI-VO≤40V, 10mA≤IO≤IMAX, PD≤PMAX	2
Reference Voltage	VREF	1.2	1.25	1.3	V	3V≤VIN-VO≤40V, 10mA≤IO≤IMAX, PD≤PMAX	2
Minimum Load Current to Maintain Regulation	IL(MIN)		3.5	12	mA	VI-VO=40V	2
RMS Noise, % of VOUT	eN		0.003	0.01	%/ VO	TA=25℃, 10Hz≤f≤10KHz	2
Long-Term Stability	ST		0.3	1	%	TJ=THIGH; TA=25℃ for end point measurements, 1000HR	2
Input-Output Voltage Differential	VI-VO			40	V		2
Lead Temperature	TLEAD			230	℃		2
Operating Junction Temperature Range	TJ	0		125	℃		2
Storage Temperature Range	Tstg	-55		125	℃		2
Temperature Coefficient of Output Voltage	ΔVO/ΔT	-0.02		0.02	%/℃		2
Thermal Resistance Junction to Case	RθJC		5		℃/W		2

CAD (KiCad official)

Symbol: LM317DCYR-HXY
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)
3D model files: lm317dcyr-hxy-etched.step / lm317dcyr-hxy-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm317dcyr-hxy.step / lm317dcyr-hxy.glb are the bare package body.

Provenance

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

Datasheet: HXY MOSFET datasheet (4 pp, sha256 9d4e7e1a83aa0259, retrieved 2026-10-19, 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