Voltage Regulators - Switching Regulators

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SC189 Step Down Regulators

Semtech SC189 Step Down Regulators deliver up to 1.5A output current in either an ultra-small 2mm x 2mm, low profile package, or a low-cost SOT23-5 package. With only three external filter components, the SC189 is a complete step-down regulator solution. The SC189 Regulators feature an input voltage range of 2.9V to 5.5V with either factory-programmed outputs from 1.0V to 3.3V or adjustable output via an external resistor divider.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Topology	Output Voltage	Output Current	Number of Outputs	Switching Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Series	Packaging
Switching Voltage Regulators 1.5A SYNCHRONOUS STEP DOWN REG SC189HSKTRT Semtech 1: $0.99 3,787In Stock	Mfr. Part No. SC189HSKTRT Mouser Part No 947-SC189HSKTRT	Semtech	Switching Voltage Regulators 1.5A SYNCHRONOUS STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	3,787In Stock	Cut Tape $0.99 $0.708 $0.638 $0.562 Reel $0.434 View $0.526 $0.504 $0.488 $0.433 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	1.5 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189CULTRT Semtech 1: $0.911 31,273In Stock	Mfr. Part No. SC189CULTRT Mouser Part No 947-SC189CULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	31,273In Stock	Cut Tape $0.911 $0.648 $0.576 $0.514 Reel $0.404 View $0.48 $0.459 $0.438 $0.397 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	1.2 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189LULTRT Semtech 1: $0.90 2,705In Stock	Mfr. Part No. SC189LULTRT Mouser Part No 947-SC189LULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	2,705In Stock	Cut Tape $0.90 $0.641 $0.578 $0.507 Reel $0.416 View $0.475 $0.454 $0.44 $0.405 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	1.8 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189BULTRT Semtech 1: $0.98 2,733In Stock	Mfr. Part No. SC189BULTRT Mouser Part No 947-SC189BULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	2,733In Stock	Cut Tape $0.98 $0.701 $0.633 $0.556 Reel $0.45 View $0.52 $0.498 $0.483 $0.438 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	1.1 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG SC189ZSKTRT Semtech 1: $1.03 9,185In Stock	Mfr. Part No. SC189ZSKTRT Mouser Part No 947-SC189ZSKTRT	Semtech	Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	9,185In Stock	Cut Tape $1.03 $0.768 $0.657 $0.585 View Reel $0.468 $0.547 $0.525 $0.501 $0.468 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	3.3 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG SC189ASKTRT Semtech 1: $0.90 14,196In Stock 6,000Expected 2026/10/26	Mfr. Part No. SC189ASKTRT Mouser Part No 947-SC189ASKTRT	Semtech	Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	14,196In Stock 6,000Expected 2026/10/26	Cut Tape $0.90 $0.643 $0.58 $0.511 Reel $0.418 View $0.476 $0.456 $0.441 $0.414 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	1 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHZ-1.5A SYNC STEP DOWN REG SC189BSKTRT Semtech 1: $0.99 2,995In Stock	Mfr. Part No. SC189BSKTRT Mouser Part No 947-SC189BSKTRT	Semtech	Switching Voltage Regulators 2.5MHZ-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	2,995In Stock	Cut Tape $0.99 $0.708 $0.64 $0.563 Reel $0.455 View $0.526 $0.504 $0.49 $0.443 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	1.1 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG SC189LSKTRT Semtech 1: $0.97 679In Stock 6,000Expected 2026/09/30	Mfr. Part No. SC189LSKTRT Mouser Part No 947-SC189LSKTRT	Semtech	Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	679In Stock 6,000Expected 2026/09/30	Cut Tape $0.97 $0.698 $0.63 $0.555 Reel $0.452 View $0.518 $0.497 $0.483 $0.45 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	1.8 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG SC189CSKTRT Semtech 1: $0.961 1,382In Stock 12,000Expected 2026/10/01	Mfr. Part No. SC189CSKTRT Mouser Part No 947-SC189CSKTRT	Semtech	Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	1,382In Stock 12,000Expected 2026/10/01	Cut Tape $0.961 $0.726 $0.619 $0.552 Reel $0.461 View $0.516 $0.50 $0.484 $0.44 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	1.2 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG SC189YSKTRT Semtech 1: $0.961 1,109In Stock	Mfr. Part No. SC189YSKTRT Mouser Part No 947-SC189YSKTRT	Semtech	Switching Voltage Regulators 2.5MHz-1.5A SYNC STEP DOWN REG Learn More about Semtech sc189 regulators	Datasheet	1,109In Stock	Cut Tape $0.961 $0.691 $0.623 $0.549 Reel $0.444 View $0.513 $0.491 $0.476 $0.433 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	SOT-23-5	Buck	2.5 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189AULTRT Semtech 1: $0.97 5,721On Order	Mfr. Part No. SC189AULTRT Mouser Part No 947-SC189AULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	5,721On Order	Cut Tape $0.97 $0.699 $0.632 $0.555 View Reel $0.45 $0.519 $0.497 $0.483 $0.45 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	1 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189ZULTRT Semtech 1: $1.01 5,240Expected 2027/02/19	Mfr. Part No. SC189ZULTRT Mouser Part No 947-SC189ZULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	5,240Expected 2027/02/19	Cut Tape $1.01 $0.721 $0.649 $0.571 View Reel $0.472 $0.533 $0.511 $0.495 $0.472 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	3.3 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 85 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189HULTRT Semtech 3,000: $0.458 Non-Stocked Lead-Time 26 Weeks	Mfr. Part No. SC189HULTRT Mouser Part No 947-SC189HULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	Non-Stocked Lead-Time 26 Weeks	Reel $0.458 $0.452	Min.: 3,000 Mult.: 3,000 : 3,000	SMD/SMT	MLPD-UT-6	Buck	1.5 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189NULTRT Semtech 1: $1.03 Non-Stocked	Mfr. Part No. SC189NULTRT Mouser Part No 947-SC189NULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	Non-Stocked	Cut Tape $1.03 $0.739 $0.665 $0.586 Reel $0.484 View $0.548 $0.526 $0.511 $0.461 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	MLPD-UT-6	Buck	2 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel, Cut Tape, MouseReel
Switching Voltage Regulators SYNC STEP DOWN REGULATOR SC189TULTRT Semtech 3,000: $0.504 Non-Stocked	Mfr. Part No. SC189TULTRT Mouser Part No 947-SC189TULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	Non-Stocked	Reel $0.504 $0.475	Min.: 3,000 Mult.: 3,000 : 3,000	SMD/SMT	MLPD-UT-6	Buck	2.5 V	1.5 A	1 Output	2.5 MHz	- 40 C	+ 125 C	SC189	Reel

SC189 Step Down Regulators

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