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/ 0.895 243,113In 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	243,113In 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.: 3,250 : 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 56,077In 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	56,077In 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.: 3,170 : 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 30mA 10% CCR NSI45030AT1G onsemi 1: S/ 0.817 22,792In Stock 138,000Expected 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	22,792In Stock 138,000Expected 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 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 7/9/2027 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 SOT223 30mA 10% CCR NSI45030AZT1G onsemi 1: S/ 2.06 3,840In 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	3,840In 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 : 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: 6,000 Expected 12/8/2027 12,000 TBD 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 5,410In 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	5,410In 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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