Buck Converters for Power Over Ethernet

A buck converter is a power efficient voltage step-down converter that changes a higher voltage to a lower voltage. Whereas a linear regulator can achieve the same purpose, regulators can waste more energy via conversion of excess energy to heat. For this reason, a buck DC/DC converter is the preferred choice for power-efficient designs. A DC/DC boost converter, also known as a step-up converter, is a semiconductor device or electrical circuit that has an output DC voltage that is greater than the DC input voltage.

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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 Topology
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Output Voltage
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Analog Devices Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr
Datasheet
2,371In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,371

Buck 1 Output 50 kHz to 900 kHz 100 % 800 mV to 60 V 10 A - 40 C + 125 C SMD/SMT TSSOP-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Automotive 80-V syn chronous buck DC/DC
Datasheet
1,087In Stock
6,000Expected 12/18/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 2.2 MHz 100 % 800 mV to 55 V 20 A - 40 C + 125 C SMD/SMT VQFN-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,807In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 65 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,954In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 65 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,848In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 65 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
1,897In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 100 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
1,296In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 100 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,975In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 100 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,896In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 1,001
: 3,000

Buck 1 Output 100 kHz 80 % 10 V to 26 V - 40 C + 125 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control with Light Load Mode Selection
Datasheet
4,173In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5,000

Buck 1 Output 270 kHz to 800 kHz 85 % 600 mV to 30 V - 40 C + 125 C SMD/SMT VQFN-16 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MHENOPB
Datasheet
2,317In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Boost, Buck 1 Output 500 kHz 80 % 1.23 V to 38 V 4 A - 40 C + 125 C SMD/SMT HTSSOP-20 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers High Perf Sync Buck Controller A 595-LM2 A 595-LM27403SQE/NOPB
Datasheet
1,948In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Buck 1 Output 1.05 MHz 93 % 600 mV to 19 V 30 A - 40 C + 125 C SMD/SMT WQFN-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers High Perf Sync Buck Cntlr A 595-LM27403S A 595-LM27403SQ/NOPB
Datasheet
3,304In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 1.05 MHz 93 % 600 mV to 19 V 25 A - 40 C + 125 C SMD/SMT WQFN-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Low Iq Wide Input R ange Synchronous Buc A 595-LM5141RGET
Datasheet
1,204In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 440 kHz, 2.2 MHz 99 % 3.3 V, 5 V, 1.5 V to 15 V 20 A - 40 C + 125 C SMD/SMT VQFN-24 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Automotive 75-V sync hronous buck DC/DC
Datasheet
997In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 100 kHz to 1 MHz 99 % 800 mV to 60 V 30 A - 40 C + 150 C SMD/SMT VQFN-20 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 75V Synchronous Buck Controller With Wid A 595-LM5145RGYT
Datasheet
6,778In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 100 kHz to 1 MHz 99 % 800 mV to 60 V 30 A - 40 C + 125 C SMD/SMT VQFN-20 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 75V Synchronous Buck Controller With Wid A 595-LM5145RGYR
Datasheet
2,460In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 100 kHz to 1 MHz 99 % 800 mV to 60 V 30 A - 40 C + 125 C SMD/SMT VQFN-20 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Multiphase bidirecti onal current contro A 595-LM5170QPHPRQ1
Datasheet
135In Stock
250Expected 9/14/2026
MouseReel Available
Min.: 1
Mult.: 1
: 250

Boost, Buck 2 Output 50 kHz to 500 kHz 100 % 100 mV to 100 V 50 A - 40 C + 150 C SMD/SMT HTQFP-48 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 4 Ch Multiphase Buck DC/DC Controller A A 595-TPS40090PW
Datasheet
985In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

Buck 1 Output 100 kHz to 1 MHz 87.5 % 700 mV to 3.3 V 120 A - 40 C + 85 C SMD/SMT TSSOP-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Wide Inp Non-Sync Bu ck DC/DC Cntrlr A 5 A 595-TPS40200D
Datasheet
1,460In Stock
2,500Expected 12/28/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Buck 1 Output 35 kHz to 500 kHz 95 % 700 mV to 46 V 3 A - 40 C + 85 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Wide Inp Non-Synch B uck DC/DC Cntrlr A A 595-TPS40200DRBT
Datasheet
2,410In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 35 kHz to 500 kHz 95 % 700 mV to 46 V 3 A - 40 C + 85 C SMD/SMT SON-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Mil Enhanced Nonsync Vltg-Mode Cntrlr
Datasheet
Product Comments
2,069In Stock
2,500Expected 2/15/2027
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Buck 1 Output 35 kHz to 500 kHz 95 % 700 mV to 46 V 3 A - 55 C + 125 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Wide-Inp-Rng Nonsync Vltg-Mode Cntrlr
Datasheet
2,051In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Buck 1 Output 35 kHz to 500 kHz 95 % 700 mV to 46 V 3 A - 40 C + 125 C SMD/SMT SOIC-8 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 3-20V Wide Input Syn ch Buck Cntrlr A 59 A 595-TPS40304DRCT
Datasheet
3,915In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 600 kHz 90 % 600 mV to 18 V 25 A - 40 C + 125 C SMD/SMT VSON-10 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Fixed-Freq Notebook Sys Pwr Controller A A 595-TPS51220ARTVT
Datasheet
2,405In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 2 Output 200 kHz to 1 MHz 99 % 1 V to 12 V 20 A - 40 C + 85 C SMD/SMT WQFN-32 Reel, Cut Tape, MouseReel