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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 (EUR) 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: 3,03 € 988In Stock 28.000On Order	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	988In Stock 28.000On Order On Order Ship Dates Mfr. No: LMR14203XMK/NOPB Stock: 988 Can Dispatch Immediately On Order: 13.000 Expected 11/25/2026 15.000 Expected 5/6/2027 Factory Lead Time: 26 Weeks	Cut Tape 3,03 € 2,28 € 2,09 € 1,88 € View Reel 1,67 € 1,78 € 1,75 € 1,67 € 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: 2,86 € 421In 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	421In Stock	Cut Tape 2,86 € 2,15 € 1,97 € 1,77 € Reel 1,67 € View 1,59 € 1,54 € 1,52 € 1,49 € 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: 2,43 € 96In Stock 12.000Expected 12/3/2026	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 12/3/2026	Cut Tape 2,43 € 1,81 € 1,66 € 1,49 € View Reel 1,27 € 1,41 € 1,38 € 1,27 € 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: 2,70 € 85In Stock 10.000Expected 11/26/2026	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 11/26/2026	Cut Tape 2,70 € 2,03 € 1,86 € 1,64 € View Reel 1,40 € 1,55 € 1,52 € 1,40 € 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: 2,30 € 175In Stock 12.000On Order	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	175In Stock 12.000On Order On Order Ship Dates Mfr. No: LMR14206XMKX/NOPB Stock: 175 Can Dispatch Immediately On Order: 6.000 Expected 3/25/2027 6.000 Expected 5/6/2027 Factory Lead Time: 26 Weeks	Cut Tape 2,30 € 1,75 € 1,60 € 1,44 € View Reel 1,20 € 1,36 € 1,33 € 1,30 € 1,20 € 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: 2,35 € 14.751Expected 12/3/2026	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 12/3/2026	Cut Tape 2,35 € 1,99 € 1,81 € 1,64 € Reel 1,48 € 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