Voltage Regulators - Switching Regulators – Mouser United Kingdom

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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 (GBP) 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: £2.62 3,153In Stock 13,000Expected 19/11/2026	Mfr. Part No. LMR14203XMK/NOPB Mouser Part No 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 19/11/2026	Cut Tape £2.62 £1.96 £1.80 £1.62 Reel £1.42 View £1.54 £1.51 £1.39 £1.28 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: £2.50 630In Stock	Mfr. Part No. LMR14203XMKE/NOPB Mouser Part No 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 £2.50 £1.88 £1.72 £1.55 Reel £1.44 View £1.39 £1.34 £1.33 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: £2.12 96In Stock 12,000Expected 14/12/2026	Mfr. Part No. LMR14203XMKX/NOPB Mouser Part No 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 14/12/2026	Cut Tape £2.12 £1.58 £1.45 £1.30 Reel £1.10 View £1.22 £1.20 £1.14 £1.08 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: £2.27 85In Stock 10,000Expected 19/11/2026	Mfr. Part No. LMR14206XMK/NOPB Mouser Part No 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 19/11/2026	Cut Tape £2.27 £1.70 £1.55 £1.41 Reel £1.20 View £1.33 £1.30 £1.19 £1.16 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: £2.01 714In Stock 6,000Expected 01/04/2027	Mfr. Part No. LMR14206XMKX/NOPB Mouser Part No 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 01/04/2027	Cut Tape £2.01 £1.53 £1.40 £1.26 Reel £0.995 View £1.19 £1.16 £1.13 £0.986 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: £2.11 14,751Expected 19/11/2026	Mfr. Part No. LMR14206XMKE/NOPB Mouser Part No 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 19/11/2026	Cut Tape £2.11 £1.70 £1.55 £1.41 Reel £1.32 View £1.25 £1.20 £1.18 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