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 (EUR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Topology
Number of Outputs
Switching Frequency
Duty Cycle - Max
Input Voltage
Output Voltage
Output Current
Minimum Operating Temperature
Maximum Operating Temperature
Mounting Style
Package/Case
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Texas Instruments Switching Controllers Adj Hi-Efficient Ste p-Dwn 20uA SOT-23 A A 595-TPS64203DBVT
Datasheet
7,212In Stock
6,000Expected 30/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 800 kHz 100 % 1.2 V to 6.5 V 3 A - 40 C + 85 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842AD8
Datasheet
4,055In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Boost, Buck, Flyback, Forward 1 Output 500 kHz 100 % 5 V 200 mA 0 C + 70 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Current Mode
Datasheet
3,100In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 500 kHz 100 % 5 V 200 mA 0 C + 70 C Through Hole PDIP-8 Tube
Texas Instruments Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD8
Datasheet
3,908In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Boost, Buck, Flyback, Forward 1 Output 500 kHz 100 % 5 V 200 mA 0 C + 70 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843D8
Datasheet
4,080In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Boost, Buck, Flyback, Forward 1 Output 500 kHz 100 % 5 V 200 mA 0 C + 70 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers BiCMOS Low-Power Cur rent Mode A 595-UCC A 595-UCC38C40DGK
Datasheet
1,320In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Boost, Buck, Flyback, Forward 1 Output 1 MHz 100 % 18 V 1 A 0 C + 70 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers High Perf Sync Buck Cntrlr A 926-LM27402 A 926-LM27402MH/NOPB
Datasheet
2,190In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Buck 1 Output 200 kHz to 1.2 MHz 95 % 600 mV to 18.6 V 30 A - 40 C + 125 C SMD/SMT HTSSOP-16 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 3-V to 20-V voltage mode synchronous bu A 926-LM27402SQX/NOPB
Datasheet
989In Stock
1,000Expected 22/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Buck 1 Output 200 kHz to 1.2 MHz 95 % 600 mV to 18.6 V 30 A - 40 C + 125 C SMD/SMT WQFN-16 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers High Efficiency High -Side N-Channel Con A 926-LM3477MMX/NOPB
Datasheet
1,138In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Buck 1 Output 500 kHz 93 % 1.265 V 6 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers HYSTERETIC PFET BUCK CONTROLLER A 926-LM A 926-LM3489MMX/NOPB
Datasheet
3,919In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

Buck 1 Output 1.4 MHz 100 % 1.239 V to 35 V 4 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Wide Input Range Syn c Buck Cntlr A 595- A 595-LM5117PMHE/NOPB
Datasheet
854In Stock
Min.: 1
Mult.: 1

Buck 1 Output 50 kHz to 750 kHz 98 % 800 mV to 62 V 20 A - 40 C + 125 C SMD/SMT HTSSOP-20 Tube

Texas Instruments Switching Controllers 5.5-65V Wide Vin Cu rrent Mode Synchrono A 595-LM5117PMHE/NOPB
Datasheet
2,831In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

Buck 1 Output 50 kHz to 750 kHz 98 % 800 mV to 62 V 20 A - 40 C + 125 C SMD/SMT HTSSOP-20 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 20V 20A Buck Cntrl + Internal 5V LDO
Datasheet
973In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 778

Buck 2 Output 300 kHz to 600 kHz 93 % 5 V 20 A - 40 C + 85 C SMD/SMT LFCSP-32 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 03-5 Amp non synchronous buck controller
Datasheet
3,040In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2,432
: 3,000

Buck 1 Output 580 kHz 100 % 800 mV to 14 V 5 A - 40 C + 125 C SMD/SMT TSOT-6 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr
Datasheet
849In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 679

Buck 1 Output 50 kHz to 850 kHz 100 % 800 mV to 60 V - 40 C + 125 C SMD/SMT TSSOP-20-16 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 2-Phase Sync Boost CTL, 40V, 3MHz
Datasheet
525In Stock
Min.: 1
Mult.: 1
Max.: 420

Boost, Buck 1 Output 3 MHz 100 % 40 V - 40 C + 150 C SMD/SMT QFN-28 Tube
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
136In Stock
Min.: 1
Mult.: 1
Max.: 108

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Analog Devices / Maxim Integrated Switching Controllers 5V/3.3V or Adjustable, 100 Duty Cycle,
Datasheet
510In Stock
Min.: 1
Mult.: 1
Max.: 408

Buck 1 Output 300 kHz 100 % 3.3 V to 5 V 3 A - 40 C + 85 C SMD/SMT SOIC-Narrow-8 Tube
Analog Devices / Maxim Integrated Switching Controllers High-Voltage, Step-Down DC-DC Controller in MAX
Datasheet
812In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 684

Buck 1 Output 330 kHz 100 % 1.25 V to 18 V 10 A - 40 C + 85 C SMD/SMT UMAX-10 Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Switching Controllers Dual-Output Step-Down DC-DC Converter fo
Datasheet
430In Stock
Min.: 1
Mult.: 1
Max.: 344

Buck 2 Output 1.25 MHz 100 % 500 mV to 5.5 V 2 A - 40 C + 85 C SMD/SMT QSOP-16 Tube
Analog Devices / Maxim Integrated Switching Controllers Step-Down Controllers with Synchronous R
Datasheet
162In Stock
Min.: 1
Mult.: 1
Max.: 129

Buck 1 Output 300 kHz 96 % 2.5 V to 6 V 50 mA - 40 C + 85 C SMD/SMT SOIC-Narrow-16 Tube
Analog Devices / Maxim Integrated Switching Controllers Low-Dropout, Wide-Input-Voltage, Step-Do
Datasheet
422In Stock
Min.: 1
Mult.: 1
Max.: 337

Buck 1 Output 200 kHz to 1.4 MHz 99.5 % 600 mV to 28 V 20 A - 40 C + 85 C SMD/SMT TQFN-16 Tube
Texas Instruments Switching Controllers Automotive 42-V sync hronous buck DC/DC
Datasheet
39In Stock
9,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

Buck 1 Output 2.2 MHz 100 % 800 mV to 36 V 20 A - 40 C + 150 C SMD/SMT VQFN-24 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-mode flyback controller with sec
Datasheet
2,797In 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