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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 (CRC) 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: ₡546,49 3 025In Stock 3 000Expected 11/23/2026 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	3 025In Stock 3 000Expected 11/23/2026	Cut Tape ₡546,49 ₡395,55 ₡357,04 ₡314,88 Reel ₡265,44 View ₡294,58 ₡282,61 ₡274,81 ₡259,19	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: ₡546,49 3 235In 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 235In Stock	Cut Tape ₡546,49 ₡395,55 ₡357,04 ₡321,13 Reel ₡259,71 View ₡300,31 ₡288,34 ₡280,53 ₡253,47 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: ₡640,17 4 951In 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 951In Stock	Cut Tape ₡640,17 ₡460,61 ₡416,89 ₡367,97 Reel ₡330,50 View ₡345,07 ₡331,02 ₡311,24 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: ₡546,49 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 ₡546,49 ₡395,55 ₡357,04 ₡314,88 Reel ₡259,71 View ₡294,58 ₡282,61 ₡274,81 ₡253,47 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: ₡562,10 412In 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	412In Stock 6 000On Order On Order Ship Dates Mfr. #: LMR51603YDBVR Stock: 412 Can Ship Immediately On Order: 3 000 Expected 11/23/2026 3 000 Expected 4/1/2027 Factory Lead-Time: 26 Weeks	Cut Tape ₡562,10 ₡403,88 ₡364,33 ₡321,13 Reel ₡265,44 View ₡300,31 ₡288,34 ₡280,53 ₡253,47 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: ₡546,49 527In Stock 3 000Expected 2/4/2027 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	527In Stock 3 000Expected 2/4/2027	Cut Tape ₡546,49 ₡395,55 ₡357,04 ₡314,88 Reel ₡259,71 View ₡294,58 ₡282,61 ₡274,81 ₡253,47 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: ₡634,97 4 998In 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 998In Stock	Cut Tape ₡634,97 ₡459,57 ₡416,37 ₡367,97 Reel ₡300,31 View ₡345,07 ₡331,02 ₡320,09 ₡294,06 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