LT3021ES8-1.8#PBF from Analog Devices, in a SO-8. 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	NC	unconnected	No connect; the pin may be left floating, tied to IN, or tied to GND.
2	OUT	power_out	Supplies power to the load; a minimum output capacitor of 3.3μF (ESR of 0.2Ω or less) is required to prevent oscillations.
3	SENSE	input	Sense point for the internal resistor divider on the fixed-voltage device, which should be tied directly to the OUT pin for best results.
4	AGND	power_in	Ground reference for the device.
5	SHDN	input	Pulling SHDN low turns the output off; it can be driven by logic or an open collector/drain with a pull-up resistor, and must be connected to VIN if unused since the device does not function when SHDN is unconnected.
6	PGND	power_in	Ground pin for the power path of the regulator.
7	NC	unconnected	No connect; the pin may be left floating, tied to IN, or tied to GND.
8	IN	power_in	Supplies power to the device with a 3.3μF to 10μF bypass capacitor recommended if it is more than six inches from the main input filter capacitor; input voltage range is 0.9V to 10V with ±10V absolute maximum.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SO-8
Category	Interface ICs
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Minimum Input Voltage (TJ > 0 C)			0.9	1.05	V	ILOAD = 500mA, TJ > 0°C	4
Minimum Input Voltage (TJ < 0 C)			0.9	1.1	V	ILOAD = 500mA, TJ < 0°C	4
Regulated Output Voltage LT3021-1.8		1.764	1.8	1.836	V	VIN = 2.1V, ILOAD = 1mA	4
Regulated Output Voltage LT3021-1.8 (full temp range)		1.737	1.8	1.854	V	2.1V < VIN < 10V, 1mA < ILOAD < 500mA, over full operating temperature range	4
Line Regulation LT3021-1.8 (full temp range)		-15.8	0	15.8	mV	ΔVIN = 2.1V to 10V, ILOAD = 1mA, over full operating temperature range	4
Load Regulation LT3021-1.8		-9	2	9	mV	VIN = 2.1V, ΔILOAD = 1mA to 500mA	4
Dropout Voltage			45	75	mV	ILOAD = 10mA	4
Dropout Voltage (full temp range)				110	mV	ILOAD = 10mA, over full operating temperature range	4
Dropout Voltage			155	190	mV	ILOAD = 500mA	4
Dropout Voltage (full temp range)				285	mV	ILOAD = 500mA, over full operating temperature range	4
GND Pin Current			110	250	uA	VIN = VOUT(NOMINAL) + 0.4V, ILOAD = 0mA	4
GND Pin Current			6.2	10	mA	VIN = VOUT(NOMINAL) + 0.4V, ILOAD = 500mA	4
Shutdown Threshold (VOUT Off to On)		0.61		0.9	V	VOUT = Off to On, over full operating temperature range	4
Shutdown Threshold (VOUT On to Off)		0.25		0.61	V	VOUT = On to Off, over full operating temperature range	4
SHDN Pin Current			3	9.5	uA	VSHDN = 0V, VIN = 10V, over full operating temperature range	4
SHDN Pin Current		-1		1	uA	VSHDN = 10V, VIN = 10V, over full operating temperature range	4
Quiescent Current in Shutdown			3	9	uA	VIN = 6V, VSHDN = 0V	4
Ripple Rejection LT3021-1.8		56			dB	VIN, VOUT = 1V, VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 500mA	4
Current Limit		550			mA	VIN = VOUT(NOMINAL) + 0.5V, ΔVOUT = -5%, over full operating temperature range	4
Current Limit			1.8		A	VIN = 10V, VOUT = 0V	4
Input Reverse Leakage Current			1	20	uA	VIN = -10V, VOUT = 0V	4
Reverse Output Current LT3021-1.8			10	15	uA	VOUT = 1.8V, VIN = 0V	4
Input Voltage Range (VIN)	VIN	0.9		10	V		1
Operating Junction Temperature Range (E grade)	TJ	-40		125	°C	E, I Grade	2
Output Capacitor (minimum)	COUT	3.3			uF	Minimum output capacitor to prevent oscillations	9
Output Capacitor ESR	ESR			0.2	Ohm	With minimum 3.3uF output capacitor	10
Input Bypass Capacitor		3.3		10	uF	Bypass capacitor at IN when more than six inches from input filter capacitor	9
Minimum Load Current	ILOAD	100			uA	Recommended to prevent low-frequency oscillation at ILOAD < 30uA	10
IN Pin Voltage		-10		10	V		2
OUT Pin Voltage		-10		10	V		2
Input-to-Output Differential Voltage		-10		10	V		2
ADJ/SENSE Pin Voltage		-10		10	V		2
SHDN Pin Voltage		-10		10	V		2
Storage Temperature Range (S8)	TSTG	-65		150	°C	S8 package	2
Lead Temperature (Soldering, 10 sec, S8)				300	°C	Soldering, 10 sec, S8 package	2
Maximum Junction Temperature (TJMAX)	TJMAX			150	°C	S8 package	2
Junction-to-Ambient Thermal Resistance (θJA)	θJA		125		°C/W	S8 package, see Applications Information	2
Junction-to-Case Thermal Resistance (θJC)	θJC		40		°C/W	S8 package, measured junction to pin 6	2
Measured Junction-to-Ambient Thermal Resistance (topside copper 2500 mm2)	θJA		70		°C/W	S8, topside copper 2500mm2, backside 2500mm2, board 2500mm2, still air, 3/32in FR-4	12
Measured Junction-to-Ambient Thermal Resistance (topside copper 1000 mm2)	θJA		70		°C/W	S8, topside copper 1000mm2, backside 2500mm2, board 2500mm2, still air, 3/32in FR-4	12
Measured Junction-to-Ambient Thermal Resistance (topside copper 225 mm2)	θJA		78		°C/W	S8, topside copper 225mm2, backside 2500mm2, board 2500mm2, still air, 3/32in FR-4	12
Measured Junction-to-Ambient Thermal Resistance (topside copper 100 mm2)	θJA		84		°C/W	S8, topside copper 100mm2, backside 2500mm2, board 2500mm2, still air, 3/32in FR-4	12
Measured Junction-to-Ambient Thermal Resistance (topside copper 50 mm2)	θJA		96		°C/W	S8, topside copper 50mm2, backside 2500mm2, board 2500mm2, still air, 3/32in FR-4	12

CAD (KiCad official)

Symbol: LT3021ES8-1.8#PBF
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)
3D model files: lt3021es8-1-8-pbf-etched.step / lt3021es8-1-8-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt3021es8-1-8-pbf.step / lt3021es8-1-8-pbf.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (16 pp, sha256 9be2a2fb292e277b, retrieved 2026-10-31, 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).

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LT3021ES8-1.8#PBF

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