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All Products > Semiconductors > Power Management ICs > Switching Controllers

PoE - Buck Converter

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

Category   Semiconductors >  Power Management ICs >  Switching Controllers

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Compare up to 20 parts.
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Quantity RoHS Topology Number of Outputs Switching Frequency Duty Cycle - Max Input Voltage Output Voltage Output Current Maximum Operating Temperature Mounting Style Package / Case Packaging
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Maxim Integrated MAX15301AA02+CJK
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MAX15301AA02+CJK

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Maxim Integrated Switching Controllers InTune Digital Point of Load Controller
Data Sheet 428
In Stock
1: $9.22
25: $6.22
50: $5.87
100: $4.48
250: View



Min.: 1
Mult.: 1
Buck 1 Output 300 kHz to 1 MHz 95 % 4.5 V to 14 V 500 mV to 5.25 V 40 A + 85 C SMD/SMT TQFN-EP-32 Tube
Texas Instruments UCC28911D
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UCC28911D

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Texas Instruments Switching Controllers 700V Flyback Switchr w/constant-voltage
Data Sheet 296
In Stock
1: $2.83
10: $2.55
25: $2.21
50: $2.08
100: View



Min.: 1
Mult.: 1
Buck, Flyback 1 Output 115 kHz 99 % 115 V/230 V 5 V 1.2 A + 125 C SMD/SMT SOIC-7 Tube
Maxim Integrated MAX17409GTI+
 Enlarge
Maxim Integrated Switching Controllers 1-Phase Quick-PWM
Data Sheet 2,500
In Stock
Alternative Packaging
1: $13.29
25: $9.62
50: $8.12
100: $6.42
250: View



Min.: 1
Mult.: 1
Buck 1 Output 600 kHz 100 % 20 A + 105 C SMD/SMT TQFN-28 Tube
Texas Instruments LM27403SQ/NOPB
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595-LM27403SQ/NOPB


To purchase full reel, order in multiples of 1000:
LM27403SQ/NOPB

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Texas Instruments Switching Controllers High Perf Sync Buck Controller
Page 615

Data Sheet
10,156
In Stock
Alternative Packaging
Cut Tape
1: $2.73
10: $2.46
25: $2.13
50: $2.00
100: View
1,000: $1.06

MouseReel Available


Min.: 1
Mult.: 1
Reel: 1,000
Buck 1 Output 1050 kHz 93 % 20 V 4.7 V + 125 C SMD/SMT WQFN-24 Reel
International Rectifier IR36021MTRPBF
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942-IR36021MTRPBF


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International Rectifier Switching Controllers Buck Controller I2C 200kHz to 2MHz
Page 549

Data Sheet
2,797
In Stock
More Info Available
Cut Tape
1: $7.41
10: $4.27
100: $4.03
250: $3.77
500: View
3,000: $3.31

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 2 Output 200 kHz to 2 MHz 85 % 2.9 V to 3.63 V - 35 mV to + 40 mV 104 uA + 85 C SMD/SMT PQFN-32 Reel
Texas Instruments LM5116WG/NOPB
 Enlarge
Texas Instruments Switching Controllers Wide Range Sync Buck Controller
Data Sheet 83
In Stock
1: $156.59
5: $154.44
10: $149.04
25: $145.94
50: View



Min.: 1
Mult.: 1
Buck 1 Output 200 kHz, 535 kHz 98 % 6 V to 100 V 1.215 V to 80 V 3.5 A + 125 C SMD/SMT CPAK Tray
579-MCP16301T-E/CH


To purchase full reel, order in multiples of 3000:
Microchip Technology Switching Controllers MCP2200 B/O Module
Data Sheet 2,265
In Stock
Cut Tape
1: $1.10
10: $1.01
25: $0.84
100: $0.76
Reel
3,000: $0.76

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 500 kHz 95 % 4 V to 30 V 2 V to 15 V 600 mA + 125 C SMD/SMT SOT-23-6 Reel
ON Semiconductor NCP5230MNTWG
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863-NCP5230MNTWG


To purchase full reel, order in multiples of 3000:
ON Semiconductor Switching Controllers BUCK CONTROLLER
Data Sheet 3,680
In Stock
Cut Tape
1: $1.22
10: $0.98
100: $0.753
500: $0.665
Reel
3,000: $0.465
9,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 100 kHz to 1000 kHz 95 % 4.5 V to 13.2 V 0.8 V to 3.3 V + 85 C SMD/SMT QFN-16 Reel
Microchip Technology MCP16321T-180E/NG
 Enlarge
579-MCP16321T-180ENG


To purchase full reel, order in multiples of 3300:
Microchip Technology Switching Controllers 1A Synchrouns Buck Switcher 24Vin
Data Sheet 3,275
In Stock
Cut Tape
1: $1.32
10: $1.21
25: $1.01
100: $0.92
Reel
3,300: $0.92

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,300
Buck 1 Output 1.1 MHz 99 % 6 V to 24 V 1.8 V 1 A + 125 C SMD/SMT QFN-16 Reel
Microchip Technology MCP16322T-330E/NG
 Enlarge
579-MCP16322T-330ENG


To purchase full reel, order in multiples of 3300:
Microchip Technology Switching Controllers 2A Synchrouns Buck Switcher 24Vin
Data Sheet 1,877
In Stock
Cut Tape
1: $1.48
10: $1.35
25: $1.13
100: $1.02
Reel
3,300: $1.02

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,300
Buck 1 Output 1.1 MHz 99 % 6 V to 24 V 3.3 V 2 A + 125 C SMD/SMT QFN-16 Reel
Texas Instruments UCC38C42DR
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595-UCC38C42DR


To purchase full reel, order in multiples of 2500:
Texas Instruments Switching Controllers BiCMOS Low-Power Current Mode
Data Sheet 2,500
In Stock
Alternative Packaging
Cut Tape
1: $1.59
10: $1.27
100: $1.02
500: $0.806
Reel
2,500: $0.675
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Boost, Buck, Flyback, Forward 1 Output 1 MHz 100 % 18 V 18 V 200 mA + 70 C SMD/SMT SOIC-8 Reel
Texas Instruments UCC38C43DGKR
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595-UCC38C43DGKR


To purchase full reel, order in multiples of 2500:
Texas Instruments Switching Controllers BiCMOS Low-Power Current Mode
Data Sheet 2,137
In Stock
Alternative Packaging
Cut Tape
1: $1.59
10: $1.27
100: $1.02
500: $0.806
Reel
2,500: $0.675
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck, Boost, Flyback, Forward 1 Output 1000 kHz 100 % 18 V 200 mA + 70 C SMD/SMT VSSOP-8 Reel
STMicroelectronics TSM108IDT
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511-TSM108IDT


To purchase full reel, order in multiples of 2500:
STMicroelectronics Switching Controllers Voltage/Current Cont
Data Sheet 2,795
In Stock
Cut Tape
1: $1.68
10: $1.30
100: $1.03
500: $0.941
Reel
2,500: $0.638
7,500: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck 1 Output 70 kHz to 130 kHz 100 % 80 mA + 125 C SMD/SMT SO-14 Reel
International Rectifier IR3638STRPBF
 Enlarge
942-IR3638STRPBF


To purchase full reel, order in multiples of 2500:
International Rectifier Switching Controllers HI FREQ SYNC PWM 400kHz 0.6V Track
Data Sheet 2,500
In Stock
Cut Tape
1: $1.73
10: $0.924
100: $0.816
500: $0.765
Reel
2,500: $0.704
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck 1 Output 400 kHz 95 % 13.2 V 0.6 V + 125 C SMD/SMT SOIC-14 Reel
ON Semiconductor NCP6151S52MNR2G
 Enlarge
863-NCP6151S52MNR2G


To purchase full reel, order in multiples of 2500:
ON Semiconductor Switching Controllers MULTIPHASE CONTROLLER
Data Sheet 3,202
In Stock
Cut Tape
1: $1.92
10: $1.55
100: $1.24
500: $1.09
Reel
2,500: $0.837
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck 2 Output 200 kHz to 1 MHz 100 % 4.75 V to 5.25 V + 125 C SMD/SMT QFN-52 Reel
International Rectifier IR3637STRPBF
 Enlarge
942-IR3637STRPBF


To purchase full reel, order in multiples of 2500:
International Rectifier Switching Controllers 2 CH OR 2 PHASE SYNC PWM CNTRLR
Data Sheet 2,310
In Stock
Cut Tape
1: $2.01
10: $1.07
100: $0.947
500: $0.887
Reel
2,500: $0.816
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck 1 Output 400 kHz 85 % 4 V to 25 V 0.8 V 15 A + 125 C SMD/SMT SOIC-8 Reel
Texas Instruments TPS40200DRBR
 Enlarge
595-TPS40200DRBR


To purchase full reel, order in multiples of 3000:
Texas Instruments Switching Controllers Wide Inp Non-Synch Buck DC/DC Cntrlr
Data Sheet 1,860
In Stock
Alternative Packaging
Cut Tape
1: $2.11
10: $1.90
25: $1.65
50: $1.55
100: View
3,000: $0.828

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 90 % SMD/SMT VSON-8 Reel
Texas Instruments UCC28910DR
 Enlarge
595-UCC28910DR


To purchase full reel, order in multiples of 2500:
UCC28910DR

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New Product


Texas Instruments Switching Controllers MCM- Primary Side FB
Data Sheet 2,358
In Stock
Alternative Packaging
Cut Tape
1: $2.15
10: $1.94
25: $1.68
50: $1.58
100: View
2,500: $0.844

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Buck, Flyback 1 Output 115 kHz 99 % + 125 C SMD/SMT SOIC-7 Reel
Texas Instruments TPS40304DRCR
 Enlarge
595-TPS40304DRCR


To purchase full reel, order in multiples of 3000:
Texas Instruments Switching Controllers 3-20V Wide Input Synch Buck Cntrlr
Data Sheet 5,687
In Stock
Alternative Packaging
Cut Tape
1: $2.73
10: $2.46
25: $2.13
50: $2.00
100: View
3,000: $1.06

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 600 kHz 90 % 12 V 6.5 V 20 A + 125 C SMD/SMT VSON-10 Reel
Texas Instruments TPS40305DRCR
 Enlarge
595-TPS40305DRCR


To purchase full reel, order in multiples of 3000:
Texas Instruments Switching Controllers 3-20V Wide Input Sync Buck Controller
Data Sheet 1,501
In Stock
Alternative Packaging
Cut Tape
1: $2.73
10: $2.46
25: $2.13
50: $2.00
100: View
3,000: $1.06

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 1.2 MHz 85 % 20 V 6.5 V 10 A + 125 C SMD/SMT VSON-10 Reel
Texas Instruments TPS40303DRCR
 Enlarge
595-TPS40303DRCR


To purchase full reel, order in multiples of 3000:
Texas Instruments Switching Controllers 3-20V Wide Input Sync Buck Controller
Data Sheet 4,731
In Stock
Alternative Packaging
Cut Tape
1: $2.73
10: $2.46
25: $2.13
50: $2.00
100: View
3,000: $1.06

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 300 kHz 90 % 20 V 6.5 V 10 A + 125 C SMD/SMT VSON-10 Reel
International Rectifier IRU3037ACSTRPBF
 Enlarge
942-IRU3037ACSTRPBF


To purchase full reel, order in multiples of 2500:
International Rectifier Switching Controllers 8 PWM 400 KHZ 200kHz Synch CTRL
Data Sheet 2,432
In Stock
Cut Tape
1: $2.74
10: $1.45
100: $1.29
500: $1.20
Reel
2,500: $1.11
5,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Boost, Buck 1 Output 400 kHz 90 % 0.8 V 15 A + 70 C SMD/SMT SOIC-8 Reel
Texas Instruments LM27403SQE/NOPB
 Enlarge
595-LM27403SQE/NOPB


To purchase full reel, order in multiples of 250:
LM27403SQE/NOPB

New Product
New Product


Texas Instruments Switching Controllers High Perf Sync Buck Cntlr
Page 615

Data Sheet
1,321
In Stock
Cut Tape
1: $3.13
10: $2.82
25: $2.45
50: $2.30
Reel
250: $2.02
500: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 250
Buck 1 Output 1050 kHz 93 % 3 V to 20 V 19 V 25 A + 125 C SMD/SMT WQFN-24 Reel
Texas Instruments TPS51218DSCR
 Enlarge
595-TPS51218DSCR


To purchase full reel, order in multiples of 3000:
Texas Instruments Switching Controllers 3-28V In,20A Synch Step Down Cntrlr
Data Sheet 2,975
In Stock
Alternative Packaging
Cut Tape
1: $3.27
10: $2.92
25: $2.63
50: $2.51
100: View
3,000: $1.46

MouseReel Available


Min.: 1
Mult.: 1
Reel: 3,000
Buck 1 Output 465 kHz 91 % 3 V to 28 V 700 mV to 2.6 V 0 A to 20 A + 85 C SMD/SMT WSON-10 Reel
Micrel MIC38HC43YM TR
 Enlarge
998-MIC38HC43YMTR


To purchase full reel, order in multiples of 2500:
Micrel Switching Controllers Monolithic High Speed SMPS Controller
Page 566

Data Sheet
1,750
In Stock
Alternative Packaging
Cut Tape
1: $3.32
10: $2.56
100: $2.09
500: $1.80
Reel
2,500: $1.23
10,000: View

MouseReel Available


Min.: 1
Mult.: 1
Reel: 2,500
Boost, Buck, Flyback, Forward 1 Output 500 kHz 96 % 5 V 1 A + 85 C SMD/SMT SOIC-8 Reel
Compare up to 20 parts.
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