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LMR51603/LMR51603-Q1 Synchronous Buck Converters

Texas Instruments LMR51603/LMR51603-Q1 Synchronous Buck Converters drive up to 300mA of load current. The wide-V_IN, easy-to-use, synchronous buck converter is designed for various industrial applications for power conditioning from an unregulated source, with a 4V to 65V wide input range.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CLP) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	ECAD Model	Mounting Style	Package / Case	Topology	Output Voltage	Output Current	Number of Outputs	Quiescent Current	Switching Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Series	Packaging
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603XDBVR Texas Instruments 1: $1.153 4.217In Stock 3.000Expected 3/15/2027 New Product	Mfr. Part # LMR51603XDBVR Mouser Part # 595-LMR51603XDBVR New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	4.217In Stock 3.000Expected 3/15/2027	Cut Tape $1.153 $834 $753 $664 View Reel $580 $621 $596 $580 $580	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	400 kHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603XFDBVR Texas Instruments 1: $1.153 3.585In Stock New Product	Mfr. Part # LMR51603XFDBVR Mouser Part # 595-LMR51603XFDBVR New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	3.585In Stock	Cut Tape $1.153 $834 $753 $677 View Reel $592 $634 $608 $592 $592 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	400 kHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603XFQDBVRQ1 Texas Instruments 1: $1.340 5.145In Stock New Product	Mfr. Part # LMR51603XFQDBVRQ1 Mouser Part # 595-LMR51603XFQDBRQ1 New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	5.145In Stock	Cut Tape $1.340 $969 $878 $776 View Reel $675 $728 $698 $675 $675 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	400 kHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603XQDBVRQ1 Texas Instruments 1: $1.350 5.594In Stock New Product	Mfr. Part # LMR51603XQDBVRQ1 Mouser Part # 595-LMR51603XQDBVRQ1 New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve	Datasheet	5.594In Stock	Cut Tape $1.350 $972 $879 $776 View Reel $698 $728 $698 $698 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	26.5 uA	400 kHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603YDBVR Texas Instruments 1: $1.186 2.870In Stock 3.000Expected 1/28/2027 New Product	Mfr. Part # LMR51603YDBVR Mouser Part # 595-LMR51603YDBVR New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	2.870In Stock 3.000Expected 1/28/2027	Cut Tape $1.186 $852 $769 $677 View Reel $592 $634 $608 $592 $592 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	1.1 MHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603Y3DBVR Texas Instruments 1: $1.153 2.423In Stock New Product	Mfr. Part # LMR51603Y3DBVR Mouser Part # 595-LMR51603Y3DBVR New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	2.423In Stock	Cut Tape $1.153 $834 $753 $664 View Reel $580 $621 $596 $580 $580 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	1.1 MHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve LMR51603YFDBVR Texas Instruments 1: $1.153 917In Stock 3.000Expected 12/31/2026 New Product	Mfr. Part # LMR51603YFDBVR Mouser Part # 595-LMR51603YFDBVR New Product	Texas Instruments	Switching Voltage Regulators 4.5V-to-65V 0.3A syn chronous buck conve Learn More about Texas Instruments ti lmr51603 q1 converters	Datasheet	917In Stock 3.000Expected 12/31/2026	Cut Tape $1.153 $834 $753 $664 View Reel $580 $621 $596 $580 $580 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1.001 : 3.000			SMD/SMT	SOT-23-6	Buck	800 mV to 28 V	300 mA	1 Output	420 uA	1.1 MHz	- 40 C	+ 150 C	LMR51603	Reel, Cut Tape, MouseReel