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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 (PHP) 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: ₱64.42 2,978In Stock 3,000Expected 19/11/2026 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	2,978In Stock 3,000Expected 19/11/2026	Cut Tape ₱64.42 ₱46.63 ₱42.09 ₱37.12 Reel ₱31.29 View ₱34.72 ₱33.31 ₱32.39 ₱30.55	Min.: 1 Mult.: 1 : 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: ₱64.42 3,205In 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	3,205In Stock	Cut Tape ₱64.42 ₱46.63 ₱42.09 ₱37.85 Reel ₱30.61 View ₱35.40 ₱33.99 ₱33.07 ₱29.88 MouseReel Available	Min.: 1 Mult.: 1 : 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: ₱75.46 4,953In 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	4,953In Stock	Cut Tape ₱75.46 ₱54.29 ₱49.14 ₱43.37 Reel ₱38.96 View ₱40.68 ₱39.02 ₱36.69 MouseReel Available	Min.: 1 Mult.: 1 : 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 LMR51603Y3DBVR Texas Instruments 1: ₱64.42 2,391In 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	2,391In Stock	Cut Tape ₱64.42 ₱46.63 ₱42.09 ₱37.12 Reel ₱30.61 View ₱34.72 ₱33.31 ₱32.39 ₱29.88 MouseReel Available	Min.: 1 Mult.: 1 : 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 LMR51603YDBVR Texas Instruments 1: ₱66.26 1,016In Stock 6,000On Order 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	1,016In Stock 6,000On Order On Order Ship Dates Mfr. #: LMR51603YDBVR Stock: 1,016 Can Ship Immediately On Order: 3,000 Expected 19/11/2026 3,000 Expected 01/04/2027 Factory Lead-Time: 20 Weeks	Cut Tape ₱66.26 ₱47.61 ₱42.95 ₱37.85 Reel ₱31.29 View ₱35.40 ₱33.99 ₱33.07 ₱29.88 MouseReel Available	Min.: 1 Mult.: 1 : 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: ₱64.42 520In Stock 3,000Expected 04/02/2027 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	520In Stock 3,000Expected 04/02/2027	Cut Tape ₱64.42 ₱46.63 ₱42.09 ₱37.12 Reel ₱30.61 View ₱34.72 ₱33.31 ₱32.39 ₱29.88 MouseReel Available	Min.: 1 Mult.: 1 : 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 LMR51603XFQDBVRQ1 Texas Instruments 1: ₱74.85 4,977In Stock	Mfr. Part # LMR51603XFQDBVRQ1 Mouser Part # 595-LMR51603XFQDBRQ1	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	4,977In Stock	Cut Tape ₱74.85 ₱54.17 ₱49.08 ₱43.37 Reel ₱35.40 View ₱40.68 ₱39.02 ₱37.73 ₱34.66 MouseReel Available	Min.: 1 Mult.: 1 : 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