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
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Texas Instruments Switching Controllers High-Performance Syn chronous Buck Contr A 926-LM21212MH-1/NOPB
Datasheet
986In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 300 kHz 91 % 800 mV to 4.6 V 20 A - 40 C + 125 C SMD/SMT MSOP-10 Reel, Cut Tape, MouseReel
Analog Devices Switching Controllers L IQ, 2x, 2-PhSync Buck Cntr
Datasheet
23In 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 / Maxim Integrated Switching Controllers Small, Dual, High-Efficiency Buck Contro
Datasheet
51In Stock
Min.: 1
Mult.: 1

Buck 2 Output 350 kHz 100 % 1.8 V, 2.5 V, 1 V to 5.5 V 600 mA - 40 C + 85 C SMD/SMT QSOP-16 Tube
Richtek Switching Controllers Dual-Channel Synchronous DC-DC Step-Down Controller with 5V/3.3V LDOs
Datasheet
607In Stock
Min.: 1
Mult.: 1
: 1.500

Buck 4 Output 300 kHz, 355 kHz 98 % Adjustable 100 mA - 40 C + 85 C SMD/SMT WQFN-20 Reel, Cut Tape
Microchip Technology Switching Controllers Monolithic SMPS Controller
Datasheet
165In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 500 mA - 40 C + 85 C SMD/SMT MSOP-8 Tube
Microchip Technology Switching Controllers Monolithic SMPS Controller
Datasheet
69In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 85 C Through Hole DIP-8 Tube
Microchip Technology Switching Controllers Sync Buck, PWM Ctrl 300Khz, 8ns
Datasheet
60In Stock
Min.: 1
Mult.: 1

Buck 1 Output 300 kHz 85 % 5 V 50 mA - 40 C + 125 C SMD/SMT DFN-10 AEC-Q100 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


Microchip Technology Switching Controllers 36V, Dual Phase COT Buck Controller, HLL & Phase Shedding
Datasheet
3.290In Stock
Min.: 1
Mult.: 1
: 3.300

Buck 1 Output 100 kHz to 1 MHz 85 % Adjustable - 40 C + 125 C SMD/SMT Reel, Cut Tape
Analog Devices Switching Controllers 40V Low IQ Dual Buck CTL w/ 3.3VOUT1
Datasheet
199In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz to 3 MHz 99 % 800 mV to 40 V 5 A - 40 C + 125 C SMD/SMT Tube
Analog Devices Switching Controllers L IQ , 60V, Hi Freq Sync Buck Cntr
Datasheet
159In Stock
Min.: 1
Mult.: 1

Buck 1 Output 320 kHz to 2.25 MHz 98 % 800 mV to 24 V 20 A - 40 C + 125 C SMD/SMT QFN-20 Tube

Microchip Technology Switching Controllers 76V Synchronous Buck Controller
Datasheet
388In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz 96 % Adjustable 15 A - 40 C + 125 C SMD/SMT MSOP-10 Tube
Analog Devices Switching Controllers Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection
Datasheet
6In Stock
Min.: 1
Mult.: 1

Boost, Buck 1 Output 80 kHz to 600 kHz 95 % 100 V 40 A - 40 C + 125 C SMD/SMT TSSOP-38 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 Adjustable-Output, Switch-Mode Current S
Datasheet
49In Stock
Min.: 1
Mult.: 1

Buck 1 Output 500 kHz 100 % 2 V to 24 V 1 uA - 40 C + 85 C SMD/SMT QSOP-16 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
Richtek Switching Controllers 12V Green Voltage Mode High Efficiency Synchronous Buck PWM Controller
Datasheet
1.497In Stock
Min.: 1
Mult.: 1
: 1.500

Buck 2 Output 300 kHz 88 % 5 V to 12 V 4 mA - 40 C + 85 C SMD/SMT WDFN-10 Reel, Cut Tape

Microchip Technology Switching Controllers Monolithic SMPS Controller
Datasheet
125In 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 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
Richtek Switching Controllers Single Phase PWM Controller with Light Load Efficiency Optimization
Datasheet
1.498In Stock
Min.: 1
Mult.: 1
: 1.500

Buck 2 Output 200 kHz 95 % 800 mV to 3.3 V 150 mA - 40 C + 85 C SMD/SMT WQFN-16 Reel, Cut Tape
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
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, 60V Sync Boost+Buck Cntr
Datasheet
6In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 150 C SMD/SMT QFN-32 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
Texas Instruments Switching Controllers High Speed PWM Contr oller
Datasheet
214In Stock
Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward 1 Output 1 MHz 100 % 5.1 V 2 A - 25 C + 85 C Through Hole PDIP-16 Tube