LMR514x0/LMR514x0-Q1 Step-Down DC/DC Converters

Texas Instruments LMR514x0/LMR514x0-Q1 Synchronous Step-Down DC/DC Converters are wide-VIN, easy-to-use synchronous buck converters capable of driving up to 4A or 5A load current. With a wide input range of 4V to 36V, the device is suitable for various industrial applications for power conditioning from an unregulated source. The LMR514x0/LMR514x0-Q1 features an adjustable switching frequency from 200kHz to 1.1MHz with an external resistor, providing the flexibility to optimize efficiency or external component size. The device has a PFM version to realize high efficiency at light load and an FPWM version to achieve constant frequency and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allows the device to be used with minimum external components.

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Description Datasheet Availability Pricing (TWD) 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 36-V 4-A synchronou s buck converter 12-
Datasheet
6,230In Stock
Cut Tape
NT$81.38
NT$60.23
NT$54.85
NT$49.11
Reel
NT$41.59
View
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 28 V 4 A 1 Output 25 uA 1.1 MHz - 40 C + 150 C LMR51440 Reel, Cut Tape, MouseReel
Texas Instruments Switching Voltage Regulators Automotive 36V 4A Sy nchronous buck con
Datasheet
5,999In Stock
Cut Tape
NT$79.23
NT$58.44
NT$53.06
NT$47.32
View
Reel
NT$44.10
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 800 mV to 28 V 4 A 1 Output 25 uA 200 kHz to 1 MHz - 40 C + 125 C LMR51440 Reel, Cut Tape
Texas Instruments Switching Voltage Regulators Automotive 36V 6A Sy nchronous buck con
Datasheet
3,245In Stock
Cut Tape
NT$90.70
NT$67.76
NT$61.66
NT$55.21
Reel
NT$46.61
View
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 800 mV to 38 V 5 A 1 Output 25 uA 200 kHz to 1 MHz - 40 C + 125 C LMR51450 Reel, Cut Tape
Texas Instruments Switching Voltage Regulators 36-V 5-A synchronou s buck converter 12-
Datasheet
321In Stock
12,000Expected 3/11/2027
Cut Tape
NT$81.74
NT$60.59
NT$55.21
NT$49.47
View
Reel
NT$41.59
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 28 V 5 A 1 Output 25 uA 1.1 MHz - 40 C + 150 C LMR51450 Reel, Cut Tape, MouseReel
Texas Instruments Switching Voltage Regulators Automotive 36V 6A Sy nchronous buck con
Datasheet
122In Stock
9,000On Order
Cut Tape
NT$91.42
NT$67.76
NT$62.02
NT$55.57
NT$52.34
Reel
NT$44.45
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 800 mV to 38 V 5 A 1 Output 25 uA 200 kHz to 1 MHz - 40 C + 125 C LMR51450 Reel, Cut Tape
Texas Instruments Switching Voltage Regulators 36-V 5-A synchronou s buck converter 12-
Datasheet
38,950On Order
Cut Tape
NT$81.74
NT$60.59
NT$55.21
NT$49.47
Reel
NT$41.23
View
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 28 V 5 A 1 Output 25 uA 1.1 MHz - 40 C + 150 C LMR51450 Reel, Cut Tape, MouseReel
Texas Instruments Switching Voltage Regulators Automotive 36V 4A Sy nchronous buck con
Datasheet
5,995Expected 11/2/2026
Cut Tape
NT$82.81
NT$61.30
NT$55.93
NT$49.83
View
Reel
NT$42.66
Min.: 1
Mult.: 1
: 3,000
SMD/SMT WSON-12 Buck 800 mV to 28 V 4 A 1 Output 25 uA 200 kHz to 1 MHz - 40 C + 125 C LMR51440 Reel, Cut Tape