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 (CLP) 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: $342 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 $342 $229 $203 $173 View Reel $132 $155 $147 $140 $132 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: $262 246.118In 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	246.118In Stock 18.000Expected 12/15/2026	Cut Tape $262 $175 $153 $133 View Reel $96,8 $122 $109 $104 $96,8 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: $273 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 $273 $203 $180 $154 View Reel $120 $141 $134 $128 $120 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: $604 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 $604 $426 $375 $332 View Reel $281 $308 $294 $281 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: $239 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 $239 $166 $147 $125 View Reel $93,4 $114 $107 $104 $93,4 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: $251 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 $251 $167 $148 $126 View Reel $96,8 $116 $109 $104 $96,8 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: $604 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 $604 $426 $382 $332 View Reel $272 $308 $294 $272 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: $273 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 $273 $181 $162 $137 View Reel $107 $126 $120 $114 $107 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: $342 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 $342 $236 $210 $180 View Reel $144 $166 $158 $152 $144 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: $581 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 $581 $403 $360 $311 View Reel $251 $291 $277 $251	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: $262 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 $262 $181 $161 $137 View Reel $106 $126 $120 $114 $106 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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