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.

Learn More

Results: 773
Select Image Part #
 Mfr.
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
Qualification
Packaging

Texas Instruments Switching Controllers Hysteretic PFET Buck Cntlr w/ Enable Pin A 926-LM3489MM/NOPB
Datasheet
8.734In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.500

Buck 1 Output 1 MHz to 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 Automotive Grade 4.5 -35V Hysteretic Non A 926-LM3489QMM/NOPB
Datasheet
2.803In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.500

Buck 1 Output 1 MHz to 1.4 MHz 100 % 1.239 V to 35 V 4 A - 40 C + 125 C SMD/SMT VSSOP-8 AEC-Q100 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers 4.5-75V Wide Vin Co nstant On-Time Non-S A 926-LM5085MME/NOPB
Datasheet
5.801In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 1 MHz 100 % 1.25 V to 75 V 1.75 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers 75V On-Time PFET Buc k Switching Cntlr A A 926-LM5085MM/NOPB
Datasheet
1.148In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 1 MHz 100 % 1.25 V to 75 V 1.75 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers 4.5-75V Wide Vin Co nstant On-Time Non-S A 926-LM5085MME/NOPB
Datasheet
3.489In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.500

Buck 1 Output 1 MHz 100 % 1.25 V to 75 V 1.75 A - 40 C + 125 C SMD/SMT VSSOP-8 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers 4.5-75V Wide Vin Co nstant On-Time Non-S A 926-LM5085MYE/NOPB
Datasheet
2.533In Stock
10.500Expected 12/21/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3.500

Buck 1 Output 1 MHz 100 % 1.25 V to 75 V 1.75 A - 40 C + 125 C SMD/SMT MSOP-PowerPad-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers 4.5-75V Wide Vin Co nstant On-Time Non-S A 926-LM5085SDE/NOPB
Datasheet
2.481In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

Buck 1 Output 1 MHz 100 % 1.25 V to 75 V 1.75 A - 40 C + 125 C SMD/SMT LLP-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Commercial 30-V lo w -power current-mode
Datasheet
1.425In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Buck, Flyback 1 Output 110 kHz 100 % 200 mA 0 C + 85 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Commercial 30-V lo w -power current-mode
Datasheet
2.470In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Buck, Flyback 1 Output 110 kHz 100 % 200 mA 0 C + 85 C SMD/SMT SOIC-8 Reel, Cut Tape, MouseReel
Microchip Technology Switching Controllers Synchronous Buck PWM Control 600kHz 12ns
Datasheet
431In Stock
Min.: 1
Mult.: 1

Buck 1 Output 600 kHz 85 % 5 V 50 mA - 40 C + 125 C SMD/SMT DFN-10 AEC-Q100 Tube
Microchip Technology Switching Controllers Synchronous Buck PWM Control 600kHz 12ns
Datasheet
182In Stock
Min.: 1
Mult.: 1

Buck 1 Output 600 kHz 85 % 5 V 50 mA - 40 C + 125 C SMD/SMT DFN-10 AEC-Q100 Tube
Microchip Technology Switching Controllers Sync Buck PWM Controller
Datasheet
25In Stock
Min.: 1
Mult.: 1

Boost, Buck 1 Output 100 kHz 100 % 500 mV to 3.6 V 30 mA - 40 C + 125 C SMD/SMT QFN-28 Tube
Texas Instruments Switching Controllers 3.5-V to 65-V low Iq dual 2-phase sync
Datasheet
14In Stock
5.000Expected 11/5/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.500

Buck 2 Output 100 kHz to 2.2 MHz 99 % 600 mV to 55 V 100 A - 40 C + 150 C SMD/SMT VQFNP-40 AEC-Q100 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Low Vin Synch Buck D C/DC Controller A 5 A 595-TPS40041DRBT
Datasheet
19In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

Buck 1 Output 600 kHz 88 % 600 mV to 4.95 V 15 A - 40 C + 85 C SMD/SMT SON-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Lo Vin Synch Buck DC /DC Cntrlr A 595-TP A 595-TPS40041DRBR
Datasheet
453In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 600 kHz 88 % 600 mV to 4.95 V 15 A - 40 C + 85 C SMD/SMT SON-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Lo Vin Synch Buck DC /DC Cntrlr ALT 595- ALT 595-TPS40041DRBT
Datasheet
Product Comments
225In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 600 kHz 88 % 600 mV to 4.95 V 15 A - 40 C + 85 C SMD/SMT SON-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Low Pin Ct Low Vin S ynch Buck DCDC A 59 A 595-TPS40042DRCR
Datasheet
30In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 600 kHz 95 % 600 mV - 40 C + 85 C SMD/SMT VSON-10 Reel, Cut Tape, MouseReel

Texas Instruments Switching Controllers Wide Input Synch Buc k Controller A 595- A 595-TPS40060PWPR
Datasheet
268In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz to 1 MHz 98 % 700 mV to 45 V 10 A - 40 C + 85 C SMD/SMT HTSSOP-16 Tube

Texas Instruments Switching Controllers Wide Input Sync Buck Cntrlr source/sink A 595-TPS40061PWPR
Datasheet
107In Stock
Min.: 1
Mult.: 1

Buck 1 Output 100 kHz to 1 MHz 98 % 700 mV to 45 V 10 A - 40 C + 85 C SMD/SMT HTSSOP-16 Tube

Texas Instruments Switching Controllers Synchronous Buck Con troller A 595-TPS40 A 595-TPS40077PWPR
Datasheet
379In Stock
Min.: 1
Mult.: 1

Buck 1 Output 1 MHz 93 % 700 mV 20 A - 40 C + 85 C SMD/SMT HTSSOP-16 Tube
Texas Instruments Switching Controllers 4.5V to 20V Buck A 5 95-TPS40195PWR A 59 A 595-TPS40195PWR
Datasheet
102In Stock
Min.: 1
Mult.: 1

Buck 1 Output 600 kHz 85 % 591 mV 20 A - 40 C + 85 C SMD/SMT TSSOP-16 Tube
Texas Instruments Switching Controllers Wide Inp Non-Synch B uck DC/DC Cntrlr A A 595-TPS40200DRBR
Datasheet
153In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 1 Output 35 kHz to 500 kHz 95 % 700 mV to 46 V 3 A - 40 C + 85 C SMD/SMT SON-8 Reel, Cut Tape, MouseReel
Texas Instruments Switching Controllers Dual DDR selectable Sync buck Controller A 595-TPS51020DBTR
Datasheet
19In Stock
Min.: 1
Mult.: 1

Buck 2 Output 450 kHz 88 % 900 mV 15 A - 40 C + 85 C SMD/SMT TSSOP-30 Tube
Texas Instruments Switching Controllers Dual Output 2Phase S ynch Buck Cntrlr A A 595-TPS5120DBTR
Datasheet
144In Stock
Min.: 1
Mult.: 1

Buck 2 Output 100 kHz to 500 kHz 83 % 900 mV to 26 V 20 A - 40 C + 85 C SMD/SMT TSSOP-30 Tube
Texas Instruments Switching Controllers Fixed-Freq Notebook Sys Pwr Controller A A 595-TPS51220ARTVR
Datasheet
157In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 250

Buck 2 Output 200 kHz to 1 MHz 99 % 1 V to 12 V 20 A - 40 C + 85 C SMD/SMT WQFN-32 Reel, Cut Tape, MouseReel