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 (JPY) 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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB
Datasheet
988In Stock
13,000Expected 11/25/2026
Cut Tape
¥584.7
¥440.2
¥403.6
¥363.8
View
Reel
¥322.2
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-LMR14203XMK/NOPB
Datasheet
755In Stock
Cut Tape
¥551.5
¥415.3
¥380.4
¥342.2
Reel
¥322.2
View
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 0.3A SD Vltg Reg A 926-LMR14203XMKENOPB
Datasheet
96In Stock
12,000Expected 12/3/2026
Cut Tape
¥470.1
¥350.5
¥320.6
¥287.4
View
Reel
¥245.8
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
85In Stock
10,000Expected 12/3/2026
Cut Tape
¥521.6
¥392
¥358.8
¥317.3
View
Reel
¥270.7
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-LMR14206XMKENOPB
Datasheet
178In Stock
6,000Expected 3/25/2027
Cut Tape
¥443.5
¥337.2
¥308.9
¥277.4
View
Reel
¥230.9
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
Texas Instruments Switching Voltage Regulators SIMPLE SWITCHER 42 V in 0.6A SD Vltg Reg A 926-LMR14206XMK/NOPB
Datasheet
14,751Expected 12/3/2026
Cut Tape
¥453.5
¥383.7
¥350.5
¥317.3
Reel
¥285.7
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