LM2594DADJR2G from onsemi, in a SOIC-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	Not connected; the datasheet's pin function table lists pins 1 through 3 as NC.
2	NC	unconnected	Not connected; the datasheet's pin function table lists pins 1 through 3 as NC.
3	NC	unconnected	Not connected; the datasheet's pin function table lists pins 1 through 3 as NC.
4	FB	input	Direct input of the error amplifier; the external resistor network R2 and R1 connects to this pin to program the output voltage.
5	ON/OFF	input	Logic-level shutdown input with a typical threshold of 1.6 V; a voltage above this value (up to VIN) shuts the regulator off, while a voltage below 1.6 V or an open pin leaves it on.
6	GND	power_in	Circuit ground pin; the datasheet refers to its PCB layout information for proper routing.
7	+VIN	power_in	Positive input supply for the step-down regulator; a suitable input bypass capacitor (CIN) must be present to minimize voltage transients and supply the switching currents.
8	OUTPUT	output	Emitter of the internal switch with a typical saturation voltage Vsat of 1 V; PCB area on this pin should be kept to a minimum to reduce coupling to sensitive circuitry.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-8
Category	Power Management 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
Supply Voltage (VIN)	VIN	4.5		40	V		3
Operating Temperature Range	TJ	-40		125	°C		3
Maximum Supply Voltage	Vin			45	V		3
ON/OFF Pin Input Voltage	ON/OFF	-0.3			V	Upper limit printed as +Vin	3
Output Voltage to Ground (Steady-State)	Vout	-1			V	Steady-state	3
Storage Temperature Range	Tstg	-65		150	°C		3
Maximum Junction Temperature	TJ			150	°C		3
Lead Temperature (Soldering)				260	°C	Soldering, 10 seconds	3
Minimum ESD Rating (Human Body Model)		2			kV	C = 100 pF, R = 1.5 k	3
Feedback Voltage (standard type)	VFB	1.193		1.267	V	8.0 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A, Vout = 5.0 V; TJ = 25°C	4
Feedback Voltage (boldface, full range)	VFB	1.18		1.28	V	8.0 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A, Vout = 5.0 V; TJ = -40°C to +125°C	4
Max Duty Cycle ON	DC			95	%	Note 4	4
Oscillator Frequency (standard)	fosc	135	150	165	kHz	Note 2; TJ = 25°C	4
Oscillator Frequency (boldface, full range)	fosc	120		180	kHz	Note 2; TJ = -40°C to +125°C	4
Saturation Voltage (standard)	Vsat		1	1.2	V	Iout = 0.5 A, Notes 3 and 4; TJ = 25°C	4
Saturation Voltage (boldface, full range)	Vsat			1.4	V	Iout = 0.5 A, Notes 3 and 4; TJ = -40°C to +125°C	4
Current Limit (standard)	ICL	0.7	1	1.6	A	Peak current, Notes 3 and 4; TJ = 25°C	4
Current Limit (boldface, full range)	ICL	0.65		1.8	A	Peak current, Notes 3 and 4; TJ = -40°C to +125°C	4
Output Leakage Current	IL		0.5	2	mA	Output = 0 V (Notes 5 and 6)	4
Output Leakage Current	IL		13	30	mA	Output = -1.0 V (Notes 5 and 6)	4
Quiescent Current	IQ		5	10	mA	Note 5	4
Standby Quiescent Current (standard)	Istby		50	200	µA	ON/OFF Pin = 5.0 V (OFF); Note 6; TJ = 25°C	4
Standby Quiescent Current (boldface, full range)	Istby			250	µA	ON/OFF Pin = 5.0 V (OFF); Note 6; TJ = -40°C to +125°C	4
Feedback Bias Current (standard)	Ib		25	100	nA	Vout = 5.0 V; TJ = 25°C	4
Feedback Bias Current (boldface, full range)	Ib			200	nA	Vout = 5.0 V; TJ = -40°C to +125°C	4
Logic Input High Threshold (standard)	VIH	2.4			V	Vout = 0 V (Regulator OFF); TJ = 25°C	4
Logic Input High Threshold (boldface, full range)	VIH	2.2			V	Vout = 0 V (Regulator OFF); TJ = -40°C to +125°C	4
Logic Input Low Threshold (standard)	VIL			0.8	V	Vout = Nominal Output Voltage (Regulator ON); TJ = 25°C	4
Logic Input Low Threshold (boldface, full range)	VIL			1	V	Vout = Nominal Output Voltage (Regulator ON); TJ = -40°C to +125°C	4
ON/OFF Pin Input Current (high)	IIH		15	30	µA	ON/OFF Pin = 5.0 V (Regulator OFF)	4
ON/OFF Pin Input Current (low)	IIL		0.01	5	µA	ON/OFF Pin = 0 V (regulator ON)	4
Thermal Resistance, Junction-to-Ambient (surface mount, SOIC-8)	RθJA		175		°C/W	Surface mount package	3

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts	copper		The LM2574 is available in both 8−pin DIP and SOIC−8 packages. When used in the typical application the copper	16

CAD (KiCad official)

Symbol: LM2594DADJR2G
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: lm2594dadjr2g-etched.step / lm2594dadjr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2594dadjr2g.step / lm2594dadjr2g.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (25 pp, sha256 5c74e92d6e2c52f2, 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

LM2594DADJR2G

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3D Model

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Schematic Symbol

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