Voltage Regulators - Switching Regulators – Mouser Canada

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LMR1420x SIMPLE SWITCHER® Step-Down Regulators

Texas Instruments LMR1420x SIMPLE SWITCHER® Step-Down Regulators are PWM DC/DC buck (step-down) regulators with a wide input range of 4.5V to 42V. These devices are suitable for a range of applications such as power conditioning from unregulated sources. These voltage regulators feature a low R_DSON (0.9Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 1.25MHz, allowing the use of small external components while still enabling low output voltage ripple. Soft-start can be implemented using the shutdown pin with an external RC circuit, allowing the user to tailor the soft-start time to a specific application.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CAD) 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 SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB LMR14203XMK/NOPB Texas Instruments 1: $5.03 3,153In Stock 13,000Expected 2026-11-19	Mfr. Part # LMR14203XMK/NOPB Mouser Part # 926-LMR14203XMK/NOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	3,153In Stock 13,000Expected 2026-11-19	Cut Tape $5.03 $3.77 $3.46 $3.11 Reel $2.74 View $2.95 $2.89 $2.66 $2.46 MouseReel Available	Min.: 1 Mult.: 1 : 1,000			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	300 mA	1 Output	16 uA	1.25 MHz	- 40 C	+ 125 C	LMR14203	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMK/NOPB LMR14203XMKE/NOPB Texas Instruments 1: $4.78 630In Stock	Mfr. Part # LMR14203XMKE/NOPB Mouser Part # 926-LMR14203XMKENOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMK/NOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	630In Stock	Cut Tape $4.78 $3.60 $3.30 $2.97 Reel $2.76 View $2.66 $2.58 $2.55 MouseReel Available	Min.: 1 Mult.: 1 : 250			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	300 mA	1 Output		1.25 MHz	- 40 C	+ 125 C	LMR14203	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB LMR14203XMKX/NOPB Texas Instruments 1: $4.08 96In Stock 12,000Expected 2026-12-14	Mfr. Part # LMR14203XMKX/NOPB Mouser Part # 926-LMR14203XMKXNOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	96In Stock 12,000Expected 2026-12-14	Cut Tape $4.08 $3.04 $2.78 $2.49 Reel $2.12 View $2.35 $2.30 $2.19 $2.07 MouseReel Available	Min.: 1 Mult.: 1 : 3,000			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	300 mA	1 Output		1.25 MHz	- 40 C	+ 125 C	LMR14203	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB LMR14206XMK/NOPB Texas Instruments 1: $4.35 85In Stock 10,000Expected 2026-11-19	Mfr. Part # LMR14206XMK/NOPB Mouser Part # 926-LMR14206XMK/NOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	85In Stock 10,000Expected 2026-11-19	Cut Tape $4.35 $3.27 $2.98 $2.69 Reel $2.32 View $2.55 $2.49 $2.28 $2.22 MouseReel Available	Min.: 1 Mult.: 1 : 1,000			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	600 mA	1 Output	16 uA	1.25 MHz	- 40 C	+ 125 C	LMR14206	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB LMR14206XMKX/NOPB Texas Instruments 1: $3.84 714In Stock 6,000Expected 2027-04-01	Mfr. Part # LMR14206XMKX/NOPB Mouser Part # 926-LMR14206XMKXNOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	714In Stock 6,000Expected 2027-04-01	Cut Tape $3.84 $2.92 $2.68 $2.40 Reel $1.90 View $2.28 $2.23 $2.17 $1.89 MouseReel Available	Min.: 1 Mult.: 1 : 3,000			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	600 mA	1 Output		1.25 MHz	- 40 C	+ 125 C	LMR14206	Reel, Cut Tape, MouseReel
	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMK/NOPB LMR14206XMKE/NOPB Texas Instruments 1: $4.05 14,751Expected 2026-11-19	Mfr. Part # LMR14206XMKE/NOPB Mouser Part # 926-LMR14206XMKENOPB	Texas Instruments	Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMK/NOPB Learn More about Texas Instruments ti lmr1420x	Datasheet	14,751Expected 2026-11-19	Cut Tape $4.05 $3.27 $2.98 $2.69 Reel $2.53 View $2.39 $2.32 $2.29 $2.26 MouseReel Available	Min.: 1 Mult.: 1 : 250			SMD/SMT	SOT-23-THIN-6	Buck	765 mV to 34 V	600 mA	1 Output		1.25 MHz	- 40 C	+ 125 C	LMR14206	Reel, Cut Tape, MouseReel