LM4120AIM5-5.0 from Texas Instruments, in a SOT-23-5. 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	REF	unconnected	REF pin; this pin must be left unconnected and is sensitive to noise and capacitive loading.
2	GND	power_in	Negative supply or ground connection.
3	Enable	input	Pulled to input for normal operation; forcing this pin to ground turns off the output, and floating it is not recommended.
4	VIN	power_in	Positive supply; the device operates with input voltages from 2 V to 12 V.
5	VOUT	power_out	Reference output, with up to ±5 mA source and sink current capability.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-5
Category	Power Management (PMIC)
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
Output voltage initial accuracy (grade A)	VOUT	-0.2		0.2	%		5
Line regulation	ΔVOUT/ΔVIN		0.0007	0.008	%/V	(VOUT + 1 V) ≤ VIN ≤ 12 V	5
Line regulation	ΔVOUT/ΔVIN			0.01	%/V	-40°C ≤ TA ≤ 85°C	5
Load regulation	ΔVOUT/ΔILOAD		0.03	0.08	%/mA	0 mA ≤ ILOAD ≤ 1 mA	5
Load regulation	ΔVOUT/ΔILOAD			0.17	%/mA	-40°C ≤ TA ≤ 85°C	5
Load regulation	ΔVOUT/ΔILOAD		0.01	0.04	%/mA	1 mA ≤ ILOAD ≤ 5 mA	5
Load regulation	ΔVOUT/ΔILOAD			0.1	%/mA	-40°C ≤ TA ≤ 85°C	5
Load regulation	ΔVOUT/ΔILOAD		0.04	0.12	%/mA	-1 mA ≤ ILOAD ≤ 0 mA	5
Temperature coefficient	TCVOUT/°C		14	50	ppm/°c	-40°C ≤ TA ≤ 125°C	5
Dropout voltage	VIN−VOUT		45	65	mV	ILOAD = 0 mA	5
Dropout voltage	VIN−VOUT			80	mV	-40°C ≤ TA ≤ 85°C	5
Dropout voltage	VIN−VOUT		120	150	mV	ILOAD = 1 mA	5
Dropout voltage	VIN−VOUT			180	mV	-40°C ≤ TA ≤ 85°C	5
Dropout voltage	VIN−VOUT		180	210	mV	ILOAD = 5 mA	5
Dropout voltage	VIN−VOUT			250	mV	-40°C ≤ TA ≤ 85°C	5
Supply current	IS		160	250	µA		5
Supply current	IS			275	µA	-40°C ≤ TA ≤ 85°C	5
Logic high input voltage	VH	2.4			V		5
Logic low input voltage	VL			0.4	V		5
Logic low input voltage	VL			0.2	V	-40°C ≤ TA ≤ 85°C	5
Logic high input current	IH		7		µA		5
Logic high input current	IH			15	µA	-40°C ≤ TA ≤ 85°C	5
Short circuit current	ISC		15		mA	VOUT = 0	6
Short circuit current	ISC	6		30	mA	-40°C ≤ TA ≤ 85°C	6
Thermal hysteresis	Hyst		0.5		mV/V	-40°C ≤ TA ≤ 125°C	5
Long term stability	ΔVOUT		100		ppm	1000 hrs @ 25°C	5
Output noise voltage 0.1 Hz to 10 Hz	VN		20		µVPP	0.1 Hz to 10 Hz	5
Output noise voltage 10 Hz to 10 kHz	VN		36		µVPP	10 Hz to 10 kHz	5
Maximum voltage on input or enable pins		-0.3		14	V		3
Power dissipation				350	mW	TA = 25°C	3
Storage temperature	Tstg	-65		150	°C		3
Lead temperature soldering				260	°C	10 sec.	3
Lead temperature vapor phase				215	°C	60 sec.	3
Lead temperature infrared				220	°C	15 sec.	3
Ambient temperature	TA	-40		85	°C		4
Junction temperature	TJ	-40		125	°C		4
Junction-to-ambient thermal resistance	RθJA		170.4		°C/W	DBV [SOT-23] 5 pins	4
Junction-to-case (top) thermal resistance	RθJC(top)		123.9		°C/W	DBV [SOT-23] 5 pins	4
Junction-to-board thermal resistance	RθJB		30.4		°C/W	DBV [SOT-23] 5 pins	4
Junction-to-top characterization parameter	ψJT		17.2		°C/W	DBV [SOT-23] 5 pins	4
Junction-to-board characterization parameter	ψJB		29.9		°C/W	DBV [SOT-23] 5 pins	4

CAD (KiCad official)

Symbol: LM4120AIM5-5.0
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)
3D model files: lm4120aim5-5-0-etched.step / lm4120aim5-5-0-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4120aim5-5-0.step / lm4120aim5-5-0.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (23 pp, sha256 52a620e678f029f5, retrieved 2026-11-05, tier: manufacturer)
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

LM4120AIM5-5.0

Verified LM4120AIM5-5.0

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README