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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Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
33In Stock
Min.: 1
Mult.: 1
Max.: 33

Buck 1 Output 500 kHz 96 % 5 V 1 A 0 C + 100 C Through Hole PDIP-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
75In Stock
100Expected 8/28/2026
Min.: 1
Mult.: 1
Max.: 175

Buck 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
140In Stock
Min.: 1
Mult.: 1
Max.: 140

Buck 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 100 C Through Hole PDIP-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
208In Stock
Min.: 1
Mult.: 1
Max.: 208

Buck 1 Output 500 kHz 96 % 5 V 1 A - 40 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
69In Stock
Min.: 1
Mult.: 1
Max.: 69

Buck 1 Output 500 kHz 96 % 5 V 1 A 0 C + 100 C Through Hole PDIP-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
100In Stock
Min.: 1
Mult.: 1
Max.: 100

Buck 1 Output 500 kHz 96 % 5 V 1 A 0 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers Hi Speed C Mode Pulse Width Mods
Datasheet
113In Stock
Min.: 1
Mult.: 1
Max.: 113

Buck 1 Output 500 kHz 96 % 5 V 1 A 0 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers 1MHz Off-Line C Mode PWM & DC/DC Conv
Datasheet
126In Stock
Min.: 1
Mult.: 1
Max.: 126

Buck 1 Output 1 MHz 100 % 5 V 1 A 0 C + 100 C SMD/SMT SOIC-8 Tube
Analog Devices Switching Controllers Hi Pwr Sync DC/DC Cntr
Datasheet
50In Stock
Min.: 1
Mult.: 1
Max.: 50

Boost, Buck 1 Output 150 kHz 90 % Adjustable 30 A 0 C + 70 C Through Hole PDIP-20 Tube
Analog Devices Switching Controllers Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection
Datasheet
7In Stock
50Expected 9/2/2026
Min.: 1
Mult.: 1
Max.: 57

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 Switching Controllers 3.3V In Hi Pwr Buck Sw Reg Cntr
Datasheet
16In Stock
50Expected 8/24/2026
Min.: 1
Mult.: 1
Max.: 66

Buck 1 Output 200 kHz 99 % 1.26 V to 2.5 V 10 A 0 C + 70 C SMD/SMT SOIC-16 Tube
Analog Devices Switching Controllers 2x Out PolyPhBuck Cntr w/ Sub-Milliohm D
Datasheet
5In Stock
Min.: 1
Mult.: 1

Buck 1 Output 1 MHz 80 % 500 mV to 5.5 V 30 A - 40 C + 125 C SMD/SMT QFN-48 Tube
Analog Devices Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr
Datasheet
184In Stock
296Expected 9/2/2026
Min.: 1
Mult.: 1

Buck 1 Output 50 kHz to 850 kHz 100 % 800 mV to 60 V 10 A - 40 C + 125 C SMD/SMT TSSOP-20 Tube
Analog Devices Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr
Datasheet
74In Stock
Min.: 1
Mult.: 1

Buck 1 Output 50 kHz to 850 kHz 100 % 800 mV to 60 V 10 A - 40 C + 125 C SMD/SMT TSSOP-20-16 Tube
Analog Devices Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr
Datasheet
23In Stock
803On Order
Min.: 1
Mult.: 1

Buck 1 Output 50 kHz to 900 kHz 100 % 800 mV to 60 V 10 A - 40 C + 125 C SMD/SMT QFN-24 Tube
Analog Devices Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr
Datasheet
71In Stock
Min.: 1
Mult.: 1

Buck 1 Output 50 kHz to 900 kHz 100 % 800 mV to 60 V 10 A - 40 C + 125 C SMD/SMT TSSOP-24 Tube
Analog Devices Switching Controllers 40V, Low Iq Dual Phse Sych Stp-Dwn Cntlr
Datasheet
146In 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 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr
Datasheet
5In Stock
750On Order
Min.: 1
Mult.: 1
Max.: 755

Buck 2 Output 50 kHz to 750 kHz 100 % 1 V to 60 V 105 uA - 40 C + 150 C SMD/SMT LQFP-48 Tray
Analog Devices Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr
Datasheet
90In Stock
250Expected 9/4/2026
Min.: 1
Mult.: 1
Max.: 340

Buck 2 Output 50 kHz to 750 kHz 100 % 1 V to 60 V 105 uA - 40 C + 125 C SMD/SMT LQFP-48 Tray
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
73In Stock
Min.: 1
Mult.: 1
Max.: 73

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, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
2In Stock
Min.: 1
Mult.: 1
Max.: 2

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 125 C SMD/SMT QFN-38 Tube

Texas Instruments Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MH/NOPB
Datasheet
229In 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 6V to 42V Synchronou s Buck DC-DC Contro A 595-LM25145RGYT
Datasheet
96In Stock
12.000Expected 1/4/2027
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

Buck 1 Output 100 kHz to 1 MHz 99 % 800 mV to 40 V 30 A - 40 C + 125 C SMD/SMT VQFN-20 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 42-V automotive sync hronous buck DC/DC
Datasheet
33In Stock
3.000Expected 10/22/2026
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 Wide Input Range Syn c Buck Cntlr A 595- A 595-LM5117QPSQE/NOPB
Datasheet
213In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 50 kHz to 750 kHz 98 % 800 mV to 62 V 20 A - 40 C + 125 C SMD/SMT WQFN-24 AEC-Q100 Reel, Cut Tape, MouseReel