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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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
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Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
478In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Texas Instruments Switching Controllers 3-V to 36-V 4-A lo w -noise synchronous
Datasheet
4.652In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

Buck 1 Output 200 kHz to 2.2 MHz 98 % 1 V to 34 V 4 A - 40 C + 150 C SMD/SMT Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 4.5-42V Wide Vin Co nstant On-Time Non-S A 926-LM25085ASDE/NOPB
Datasheet
1.068In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 1 MHz 100 % 900 mV to 42 V 1.75 A - 40 C + 125 C SMD/SMT LLP-8 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 40V Dual Low IQ, 100 DC Sync Buck CTL
Datasheet
1.458In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 3 MHz 100 % 800 mV to 40 V 180 uA - 40 C + 150 C SMD/SMT QFN-28 Tube
Analog Devices Switching Controllers 40V Dual Low IQ, 100 DC Sync Buck CTL
Datasheet
8.933In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Boost, Buck 2 Output 3 MHz 100 % 800 mV to 40 V 180 uA - 40 C + 150 C SMD/SMT QFN-28 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Wide Input Range Syn c Buck Cntlr A 595- A 595-LM5117QPMHE/NOPB
Datasheet
283In 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 AEC-Q100 Tube
Texas Instruments Switching Controllers 3-20V Wide Input Syn c Buck Controller A A 595-TPS40305DRCR
Datasheet
1.838In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 1.2 MHz 85 % 600 mV to 17 V 25 A - 40 C + 125 C SMD/SMT VSON-10 Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Switching Controllers 40V, High-Performance, Synchronous Buck
Datasheet
954In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz to 1 MHz 87.5 % 600 mV to 36 V 25 A - 40 C + 125 C SMD/SMT QSOP-16 Tube
Analog Devices / Maxim Integrated Switching Controllers 5V/3.3V or Adjustable, 100 Duty Cycle,
Datasheet
2.654In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Buck 1 Output 300 kHz 100 % 3.3 V, 5 V 3 A - 40 C + 85 C SMD/SMT SOIC-Narrow-8 Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Switching Controllers Dual-Output Step-Down DC-DC Converter fo
Datasheet
539In Stock
Min.: 1
Mult.: 1

Buck 2 Output 1.25 MHz 100 % 500 mV to 5.5 V 2 A - 40 C + 85 C SMD/SMT QSOP-16 Tube
Microchip Technology Switching Controllers 75V DC-DC Buck Controller with HLL
Datasheet
1.616In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5.000

Buck 1 Output 200 kHz to 600 kHz 85 % 800 mV to 24 V 15 A - 40 C + 125 C SMD/SMT MLF-16 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control with External Soft Start
Datasheet
6.704In Stock
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
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
355In Stock
Min.: 1
Mult.: 1

Buck 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers Hi Pwr Sync DC/DC Cntr
Datasheet
128In Stock
Min.: 1
Mult.: 1

Boost, Buck 1 Output 150 kHz 90 % Adjustable 30 A 0 C + 70 C SMD/SMT SOIC-20 Tube
Analog Devices Switching Controllers Low IQ Triple Output Buck-Buck-Boost CTL
Datasheet
485In Stock
Min.: 1
Mult.: 1

Boost, Buck 3 Output 100 kHz to 3 MHz 100 % 800 mV to 40 V 20 A - 40 C + 125 C SMD/SMT QFN-40 Tube
Texas Instruments Switching Controllers BiCMOS Advanced Phas e Shift
Datasheet
387In Stock
Min.: 1
Mult.: 1

Boost, Buck 4 Output 1 MHz 100 % 5 V 100 mA 0 C + 70 C Through Hole PDIP-20 Tube

Torex Semiconductor Switching Controllers 16V Step-Down DCDC Controller
Datasheet
2.750In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

Buck 1 Output 1 MHz 100 % 1.2 V 3 A - 40 C + 85 C SMD/SMT SOT-25-5 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 4.5-42V Wide Vin Co nstant On-Time Non-S A 926-LM25085SDE/NOPB
Datasheet
3.000In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 1 MHz 100 % 1.25 V to 42 V 1.75 A - 40 C + 125 C SMD/SMT LLP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers High Efficiency High -Side N-Channel Con A 926-LM3477AMMX/NOPB
Datasheet
811In 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 High Efficiency High -Side N-Channel Con A 926-LM3477MM/NOPB
Datasheet
4.032In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.500

Buck 1 Output 500 kHz 93 % 1.265 V 6 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers 38V DC-DC Buck Controller with HLL
Datasheet
6.968In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5.000

Buck 1 Output 200 kHz to 600 kHz 85 % 800 mV to 24 V 15 A - 40 C + 125 C SMD/SMT MLF-16 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers Monolithic High Speed SMPS Controller
Datasheet
1.960In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 85 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers Digitally enhanced power analog buck controller
Datasheet
359In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz to 1.6 MHz 100 % 300 mV to 16 V 4 A - 40 C + 125 C SMD/SMT QFN-24 Tube

Texas Instruments Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MH/NOPB
Datasheet
339In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

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 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