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: $329 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 $329 $221 $195 $167 View Reel $127 $149 $142 $135 $127 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: $253 242.353In Stock 30.600On Order	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	242.353In Stock 30.600On Order On Order Ship Dates Mfr. #: NSI45020AT1G Stock: 242.353 Can Ship Immediately On Order: 6.600 Expected 10/21/2026 24.000 Expected 12/15/2026 Factory Lead-Time: 53 Weeks	Cut Tape $253 $169 $147 $128 View Reel $93,3 $117 $105 $99,9 $93,3 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3.090 : 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: $264 55.791In Stock 12.000Expected 10/14/2026	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	55.791In Stock 12.000Expected 10/14/2026	Cut Tape $264 $195 $173 $148 View Reel $115 $136 $130 $123 $115 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3.000 : 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: $582 19.334In 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	19.334In Stock	Cut Tape $582 $411 $361 $320 View Reel $271 $296 $283 $271 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: $231 47.718In Stock 156.000Expected 10/13/2027	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	47.718In Stock 156.000Expected 10/13/2027	Cut Tape $231 $160 $142 $121 View Reel $90 $110 $103 $99,9 $90 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: $242 1.799In 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	1.799In Stock 48.000On Order On Order Ship Dates Mfr. #: NSI45025AT1G Stock: 1.799 Can Ship Immediately On Order: 12.000 Expected 4/9/2027 36.000 Expected 7/7/2027 Factory Lead-Time: 53 Weeks	Cut Tape $242 $161 $143 $122 View Reel $93,3 $112 $105 $99,9 $93,3 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4.240 : 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: $582 4.170In 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	4.170In Stock	Cut Tape $582 $411 $368 $320 View Reel $262 $296 $283 $262 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: $253 10.699In Stock	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	10.699In Stock	Cut Tape $253 $173 $154 $127 View Reel $102 $121 $114 $110 $102 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: $329 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 $329 $227 $202 $173 View Reel $138 $160 $153 $146 $138 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: $560 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 $560 $389 $347 $300 View Reel $242 $280 $267 $242	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: $253 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 $253 $175 $155 $132 View Reel $102 $122 $115 $110 $102 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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