LED Lighting Driver ICs

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NSI45 Constant Current Regulators

onsemi NSI45 Constant Current Regulators are two-terminal linear constant current regulators. These regulators are simple, economical, and robust devices that provide a cost-effective solution for regulating current in LEDs. The NSI45 regulators are based on Self-Biased Transistor technology and regulate output current over a wide input voltage range. These regulators are designed with a negative temperature coefficient to protect LEDs from thermal runaway at extreme voltages and operating temperatures. The NSI45 regulators require no external components and have a high anode-cathode voltage rating that withstands surges common in automotive, industrial, and commercial signage applications.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Number of Outputs	Topology	Output Current	Package / Case	Supply Voltage - Max	Supply Voltage - Min	Operating Frequency	Output Voltage	Series	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging
LED Lighting Driver ICs SOD 123 20MA 15% CCR NSV45020T1G onsemi 1: S/1.17 2,921In Stock	Mfr. Part # NSV45020T1G Mouser Part # 863-NSV45020T1G	onsemi	LED Lighting Driver ICs SOD 123 20MA 15% CCR Learn More about onsemi solutions ivn lighting	Datasheet	2,921In Stock	Cut Tape S/1.17 S/0.782 S/0.693 S/0.592 View Reel S/0.452 S/0.529 S/0.502 S/0.479 S/0.452 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	1 Output	Boost, Buck	20 mA	SOD-123-2	45 V	45 V	100 Hz to 100 kHz	Adjustable	NSI45020	- 55 C	+ 150 C	AEC-Q100	Reel, Cut Tape, MouseReel
LED Lighting Driver ICs LED Driver SOD 123 20mA 10% CCR NSI45020AT1G onsemi 1: S/0.895 235,489In Stock 18,000Expected 12/15/2026	Mfr. Part # NSI45020AT1G Mouser Part # 863-NSI45020AT1G	onsemi	LED Lighting Driver ICs LED Driver SOD 123 20mA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	235,489In Stock 18,000Expected 12/15/2026	Cut Tape S/0.895 S/0.599 S/0.522 S/0.455 View Reel S/0.331 S/0.416 S/0.374 S/0.354 S/0.331 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,370 : 3,000	1 Output	Boost, Buck	20 mA	SOD-123	45 V	45 V	1 MHz	Adjustable	NSI45020A	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOD 123 20mA 15% CCR NSI45020T1G onsemi 1: S/0.934 57,077In Stock	Mfr. Part # NSI45020T1G Mouser Part # 863-NSI45020T1G	onsemi	LED Lighting Driver ICs SOD 123 20mA 15% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	57,077In Stock	Cut Tape S/0.934 S/0.693 S/0.615 S/0.525 View Reel S/0.409 S/0.483 S/0.459 S/0.436 S/0.409 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,100 : 3,000	1 Output	Boost, Buck	20 mA	SOD-123	45 V	45 V	1 MHz	Adjustable	NSI45020	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOT223 25mA 10% CCR NSI45025AZT1G onsemi 1: S/2.06 18,667In Stock	Mfr. Part # NSI45025AZT1G Mouser Part # 863-NSI45025AZT1G	onsemi	LED Lighting Driver ICs SOT223 25mA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	18,667In Stock	Cut Tape S/2.06 S/1.46 S/1.28 S/1.13 View Reel S/0.961 S/1.05 S/1.00 S/0.961 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	1 Output	Boost, Buck	25 mA	SOT-223	45 V	45 V	1 MHz	Adjustable	NSI45025AZ	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOD 123 25mA 10% CCR NSI45025AT1G onsemi 1: S/0.856 1,087In Stock 48,000On Order	Mfr. Part # NSI45025AT1G Mouser Part # 863-NSI45025AT1G	onsemi	LED Lighting Driver ICs SOD 123 25mA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	1,087In Stock 48,000On Order On Order Ship Dates Mfr. #: NSI45025AT1G Stock: 1,087 Can Ship Immediately On Order: 12,000 Expected 4/9/2027 36,000 Expected 7/7/2027 Factory Lead-Time: 52 Weeks	Cut Tape S/0.856 S/0.572 S/0.506 S/0.432 View Reel S/0.331 S/0.397 S/0.374 S/0.354 S/0.331 MouseReel Available	Min.: 1 Mult.: 1 Max.: 6,000 : 3,000	1 Output	Boost, Buck	25 mA	SOD-123	45 V	45 V	1 MHz	Adjustable	NSI45025A	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOD 123 30mA 10% CCR NSI45030AT1G onsemi 1: S/0.817 2,434In Stock 156,000Expected 10/15/2027	Mfr. Part # NSI45030AT1G Mouser Part # 863-NSI45030AT1G	onsemi	LED Lighting Driver ICs SOD 123 30mA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	2,434In Stock 156,000Expected 10/15/2027	Cut Tape S/0.817 S/0.568 S/0.502 S/0.428 View Reel S/0.319 S/0.389 S/0.366 S/0.354 S/0.319 MouseReel Available	Min.: 1 Mult.: 1 Max.: 6,000 : 3,000	1 Output	Boost, Buck	30 mA	SOD-123	45 V	45 V	1 MHz	Adjustable	NSI45030A	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOT223 30mA 10% CCR NSI45030AZT1G onsemi 1: S/2.06 4,240In Stock	Mfr. Part # NSI45030AZT1G Mouser Part # 863-NSI45030AZT1G	onsemi	LED Lighting Driver ICs SOT223 30mA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	4,240In Stock	Cut Tape S/2.06 S/1.46 S/1.30 S/1.13 View Reel S/0.93 S/1.05 S/1.00 S/0.93 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,000 : 1,000	1 Output	Boost, Buck	30 mA	SOT-223	45 V	45 V	1 MHz	Adjustable	NSI45030AZ	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOD 123 20MA 10% CCR NSV45020AT1G onsemi 1: S/0.934 1,640In Stock 18,000On Order	Mfr. Part # NSV45020AT1G Mouser Part # 863-NSV45020AT1G	onsemi	LED Lighting Driver ICs SOD 123 20MA 10% CCR Learn More about onsemi solutions ivn lighting	Datasheet	1,640In Stock 18,000On Order On Order Ship Dates Mfr. #: NSV45020AT1G Stock: 1,640 Can Ship Immediately On Order: 12,000 Expected 10/11/2027 6,000 Expected 12/8/2027 Factory Lead-Time: 52 Weeks	Cut Tape S/0.934 S/0.619 S/0.553 S/0.467 View Reel S/0.366 S/0.432 S/0.409 S/0.389 S/0.366 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,000 : 3,000	1 Output	Boost, Buck	20 mA	SOD-123	45 V	45 V	100 Hz to 100 kHz	Adjustable	NSI45020A	- 55 C	+ 150 C	AEC-Q100	Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOD 123 25MA 10% CCR NSV45025AT1G onsemi 1: S/1.17 3,000In Stock	Mfr. Part # NSV45025AT1G Mouser Part # 863-NSV45025AT1G	onsemi	LED Lighting Driver ICs SOD 123 25MA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	3,000In Stock	Cut Tape S/1.17 S/0.806 S/0.716 S/0.615 View Reel S/0.49 S/0.568 S/0.541 S/0.518 S/0.49 MouseReel Available	Min.: 1 Mult.: 1 : 3,000				SOD-123					NSI45025A			AEC-Q100	Reel, Cut Tape, MouseReel
LED Lighting Driver ICs SOT223 25MA 10% CCR NSV45025AZT1G onsemi 1: S/1.99 357In Stock	Mfr. Part # NSV45025AZT1G Mouser Part # 863-NSV45025AZT1G	onsemi	LED Lighting Driver ICs SOT223 25MA 10% CCR Learn More about onsemi on semi nsi45 current regulators	Datasheet	357In Stock	Cut Tape S/1.99 S/1.38 S/1.23 S/1.06 View Reel S/0.856 S/0.993 S/0.946 S/0.856	Min.: 1 Mult.: 1 : 1,000				SOT-223					NSI45025AZ			AEC-Q100	Reel, Cut Tape
LED Lighting Driver ICs SOD 123 30MA 10% CCR NSV45030AT1G onsemi 1: S/0.895 5,406In Stock	Mfr. Part # NSV45030AT1G Mouser Part # 863-NSV45030AT1G	onsemi	LED Lighting Driver ICs SOD 123 30MA 10% CCR Learn More about onsemi solutions ivn lighting	Datasheet	5,406In Stock	Cut Tape S/0.895 S/0.619 S/0.549 S/0.467 View Reel S/0.362 S/0.432 S/0.409 S/0.389 S/0.362 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	1 Output	Boost, Buck	30 mA	SOD-123	45 V	45 V	100 Hz to 100 kHz	Adjustable	NSI45030A	- 55 C	+ 150 C	AEC-Q100	Reel, Cut Tape, MouseReel

NSI45 Constant Current Regulators

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