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 (AUD) 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: $1.44 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 $1.44 $1.03 $0.927 $0.815 View Reel $0.641 $0.763 $0.731 $0.709 $0.641 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: $1.32 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 $1.32 $0.94 $0.835 $0.745 Reel $0.584 View $0.696 $0.666 $0.635 $0.574 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 SC189BULTRT Semtech 1: $1.42 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 $1.42 $1.02 $0.916 $0.806 Reel $0.653 View $0.754 $0.724 $0.702 $0.635 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 SYNC STEP DOWN REGULATOR SC189LULTRT Semtech 1: $1.31 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 $1.31 $0.929 $0.838 $0.735 Reel $0.603 View $0.687 $0.658 $0.637 $0.577 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 2.5MHz-1.5A SYNC STEP DOWN REG SC189ASKTRT Semtech 1: $1.31 20,196In Stock	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	20,196In Stock	Cut Tape $1.31 $0.932 $0.841 $0.74 Reel $0.606 View $0.69 $0.661 $0.639 $0.60 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 SC189ZSKTRT Semtech 1: $1.49 8,185In 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	8,185In Stock	Cut Tape $1.49 $1.11 $0.953 $0.848 View Reel $0.679 $0.793 $0.76 $0.726 $0.679 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 SC189LSKTRT Semtech 1: $1.41 679In Stock 6,000Expected 9/10/2026	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 9/10/2026	Cut Tape $1.41 $1.01 $0.914 $0.805 Reel $0.655 View $0.751 $0.721 $0.699 $0.653 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: $1.39 1,082In Stock 12,000Expected 1/10/2026	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	1,082In Stock 12,000Expected 1/10/2026	Cut Tape $1.39 $1.05 $0.898 $0.80 Reel $0.667 View $0.748 $0.725 $0.702 $0.638 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: $1.39 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 $1.39 $1.00 $0.903 $0.796 Reel $0.644 View $0.744 $0.712 $0.69 $0.626 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 2.5MHZ-1.5A SYNC STEP DOWN REG SC189BSKTRT Semtech 1: $1.48 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 $1.48 $1.06 $0.954 $0.84 View Reel $0.663 $0.784 $0.753 $0.729 $0.663 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 SYNC STEP DOWN REGULATOR SC189AULTRT Semtech 1: $1.41 5,721Expected 23/09/2027	Mfr. Part No. SC189AULTRT Mouser Part No 947-SC189AULTRT	Semtech	Switching Voltage Regulators SYNC STEP DOWN REGULATOR Learn More about Semtech sc189 regulators	Datasheet	5,721Expected 23/09/2027	Cut Tape $1.41 $1.01 $0.915 $0.805 View Reel $0.653 $0.753 $0.721 $0.699 $0.653 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: $1.46 5,240Expected 19/02/2027	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 19/02/2027	Cut Tape $1.46 $1.05 $0.941 $0.828 View Reel $0.684 $0.773 $0.741 $0.718 $0.684 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: $0.664 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 $0.664	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 3,000: $0.702 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	Reel $0.702 $0.668	Min.: 3,000 Mult.: 3,000 : 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: $0.729 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 $0.729 $0.687	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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