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
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Maximum Operating Temperature
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Analog Devices Switching Controllers L IQ, 2x, 2-PhSync Buck Cntr
Datasheet
104In Stock
Min.: 1
Mult.: 1

Buck 2 Output 400 kHz 99 % 800 mV to 10 V 25 A - 40 C + 85 C SMD/SMT SSOP-28 Tube
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
30In Stock
Min.: 1
Mult.: 1

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 150 C SMD/SMT QFN-38 Tube
Analog Devices / Maxim Integrated Switching Controllers Multi-Output, Low-Noise Power-Supply Con
Datasheet
25In Stock
Min.: 1
Mult.: 1

Buck 2 Output 300 kHz 99 % 3.3 V, 5 V, 2.5 V to 5.5 V 1 A - 40 C + 85 C SMD/SMT SSOP-28 Tube
Microchip Technology Switching Controllers Monolithic SMPS Controller
Datasheet
328In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 500 mA - 40 C + 85 C Through Hole DIP-8 Tube

Analog Devices / Maxim Integrated Switching Controllers Dual Step-Down Controllers with Saturati
Datasheet
58In Stock
Min.: 1
Mult.: 1

Buck 2 Output 170 kHz to 620 kHz 100 % 700 mV to 5.5 V 7 A - 40 C + 85 C SMD/SMT TQFN-40 Tube

Analog Devices / Maxim Integrated Switching Controllers Interleaved High-Efficiency, Dual Power-
Datasheet
36In Stock
Min.: 1
Mult.: 1

Buck 2 Output 500 kHz 99 % 3.3 V, 5 V, 1 V to 5.5 V 5 A - 40 C + 85 C SMD/SMT TQFN-28 Tube

Microchip Technology Switching Controllers Monolithic SMPS Controller
Datasheet
126In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 85 C SMD/SMT SOIC-14 Tube

Analog Devices / Maxim Integrated Switching Controllers High-Speed Step-Down Controller for Note
Datasheet
97In Stock
Min.: 1
Mult.: 1

Buck 1 Output 600 kHz 100 % 1 V to 5.5 V 3 A - 40 C + 85 C SMD/SMT QSOP-16 Tube
Analog Devices / Maxim Integrated Switching Controllers Low-Cost, Wide Input Range, Step-Down Co
Datasheet
12In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz 95 % 800 mV to 23 V 15 A - 40 C + 85 C SMD/SMT UMAX-10 Tube
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
70In 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

Microchip Technology Switching Controllers 500KHz Synchronous Buck Controller
Datasheet
89In Stock
Min.: 1
Mult.: 1

Buck 1 Output 500 kHz 92 % 800 mV - 40 C + 125 C SMD/SMT MSOP-10 Tube
Analog Devices Switching Controllers GSM Power Management System
Datasheet
999In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 000

Boost, Buck 1 Output 300 kHz 98 % 5 mA - 40 C + 125 C SMD/SMT TSSOP-16 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 4.5V-20V Buck Cntrlr A 595-TPS40195RGYT A 595-TPS40195RGYT
Datasheet
4 572In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3 000

Buck 1 Output 600 kHz 85 % 591 mV to 17 V 20 A - 40 C + 85 C SMD/SMT VQFN-16 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Adj Hi-Efficient Ste p-Dwn 20uA SOT-23 A A 595-TPS64203DBVR
Datasheet
817In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

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-UC3842D
Datasheet
1 919In 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-14 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3842N
Datasheet
Product Comments
909In 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 700V Flyback Switche r A 595-UCC28910DR A 595-UCC28910DR
Datasheet
862In Stock
Min.: 1
Mult.: 1

Buck, Flyback 1 Output 115 kHz 99 % 5 V 1.26 A - 40 C + 125 C SMD/SMT SOIC-7 Tube

Texas Instruments Switching Controllers BiCMOS Low-Power Cur rent Mode A 595-UCC A 595-UCC38C42DGKR
Datasheet
955In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 1 MHz 100 % 18 V 1 A 0 C + 70 C SMD/SMT VSSOP-8 Tube
Analog Devices / Maxim Integrated Switching Controllers High-Voltage, Step-Down DC-DC Controller in MAX
Datasheet
722In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 500

Buck 1 Output 330 kHz 100 % 3.3 V, 5 V 10 A - 40 C + 85 C SMD/SMT UMAX-10 Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Switching Controllers Low-Cost, High-Frequency, Current-Mode P
Datasheet
665In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 500

Boost, Buck 1 Output 1 MHz 89 % 800 mV to 4.73 V 4 A - 40 C + 85 C SMD/SMT USOP-10 Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Switching Controllers Dual-Synchronous Buck Controllers for Po
Datasheet
142In Stock
Min.: 1
Mult.: 1

Buck 2 Output 200 kHz to 1.4 MHz 95 % 800 mV to 3.6 V 30 A - 40 C + 85 C SMD/SMT QSOP-28 Tube
Analog Devices Switching Controllers Dual/2phase Cntrl in LD20 Process
Datasheet
585In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

Buck 2 Output 200 kHz to 1.5 MHz 90 % 600 mV to 18 V 25 A - 40 C + 85 C SMD/SMT LFCSP-32 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers 1MHz Off-Line C Mode PWM & DC/DC Conv
Datasheet
226In Stock
Min.: 1
Mult.: 1

Buck 1 Output 1 MHz 100 % 5 V 1 A 0 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers PP, Hi Eff, Sync Buck Sw Reg
Datasheet
68In Stock
Min.: 1
Mult.: 1

Buck 2 Output 300 kHz 99 % 1.26 V to 2.5 V 240 A 0 C + 70 C SMD/SMT SSOP-28 Tube

Texas Instruments Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MHENOPB
Datasheet
2 889In 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