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 RDSON (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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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
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Output Voltage
Output Current
Number of Outputs
Quiescent Current
Switching Frequency
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Maximum Operating Temperature
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Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMK/NOPB
Datasheet
890In Stock
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB
Datasheet
3,989In Stock
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMK/NOPB
Datasheet
5,873In Stock
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB
Datasheet
80In Stock
6,000Expected 01/10/2026
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB
Datasheet
67In Stock
12,000Expected 02/11/2026
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMKENOPB
Datasheet
984In Stock
6,000Expected 17/12/2026
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