Switching Controllers – Mouser Singapore

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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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Part #

Switching Controllers 42V On-Time PFET Buc k Switch Cntlr A 92 A 926-LM25085MYE/NOPB

LM25085MY/NOPB
Texas Instruments
1: $3.78
11,000On Order

Mfr. Part No.
LM25085MY/NOPB

Mouser Part No
926-LM25085MY/NOPB

Texas Instruments

Switching Controllers 42V On-Time PFET Buc k Switch Cntlr A 92 A 926-LM25085MYE/NOPB

Datasheet

11,000On Order

Cut Tape

$3.78

$2.83

$2.58

$2.33

Reel

$2.00

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Buck

1 Output

1 MHz

100 %

1.25 V to 42 V

1.75 A

- 40 C

+ 125 C

SMD/SMT

MSOP-PowerPad-8

Reel, Cut Tape, MouseReel

Switching Controllers 4.5-42V Wide Vin Co nstant On-Time Non-S A 926-LM25085MYE/NOPB

LM25085MYX/NOPB
Texas Instruments
1: $3.24
13,083On Order

Mfr. Part No.
LM25085MYX/NOPB

Mouser Part No
926-LM25085MYX/NOPB

Texas Instruments

Switching Controllers 4.5-42V Wide Vin Co nstant On-Time Non-S A 926-LM25085MYE/NOPB

Datasheet

13,083On Order

Cut Tape

$3.24

$2.39

$2.19

$1.96

View

Reel

$1.65

MouseReel Available

Min.: 1
Mult.: 1

: 3,500

Buck

1 Output

1 MHz

100 %

1.25 V to 42 V

1.75 A

- 40 C

+ 125 C

SMD/SMT

MSOP-PowerPad-8

Reel, Cut Tape, MouseReel

Switching Controllers Sync Buck Controller A 926-LM5116MHX/NOP A 926-LM5116MHX/NOPB

LM5116MH/NOPB
Texas Instruments
1: $9.26
20,250On Order

Mfr. Part No.
LM5116MH/NOPB

Mouser Part No
926-LM5116MH/NOPB

Texas Instruments

Switching Controllers Sync Buck Controller A 926-LM5116MHX/NOP A 926-LM5116MHX/NOPB

Datasheet

20,250On Order

$9.26

$7.11

$6.19

$5.92

View

Min.: 1
Mult.: 1

Buck

1 Output

50 kHz to 1 MHz

98 %

1.215 V to 80 V

20 A

- 40 C

+ 150 C

SMD/SMT

HTSSOP-20

Tube

Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD8

UC3843AD8TR
Texas Instruments
1: $1.33
4,967Expected 28/8/2026

Mfr. Part No.
UC3843AD8TR

Mouser Part No
595-UC3843AD8TR

Texas Instruments

Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD8

Datasheet

4,967Expected 28/8/2026

Cut Tape

$1.33

$0.949

$0.855

$0.752

Reel

$0.619

View

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-8

Reel, Cut Tape, MouseReel

Switching Controllers Voltage/Current Cont

TSM108IDT
STMicroelectronics
1: $2.33
7,500Expected 2/7/2027

Mfr. Part No.
TSM108IDT

Mouser Part No
511-TSM108IDT

STMicroelectronics

Switching Controllers Voltage/Current Cont

Datasheet

7,500Expected 2/7/2027

Cut Tape

$2.33

$1.71

$1.56

$1.39

View

Reel

$1.14

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Buck

1 Output

70 kHz to 130 kHz

100 %

Adjustable

80 mA

- 40 C

+ 125 C

SMD/SMT

SOIC-14

Reel, Cut Tape, MouseReel

Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr

LTC7810ELXE#PBF
Analog Devices
1: $23.46
500Expected 4/9/2026

Mfr. Part No.
LTC7810ELXE#PBF

Mouser Part No
584-LTC7810ELXEPBF

Analog Devices

Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr

Learn More

Datasheet

500Expected 4/9/2026

$23.46

$18.59

$17.38

$16.03

View

Min.: 1
Mult.: 1

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

Switching Controllers Wide Inp Non-Sync Bu ck DC/DC Cntrlr A 5 A 595-TPS40200DR

TPS40200D
Texas Instruments
1: $3.63
1,194Expected 10/9/2026

Mfr. Part No.
TPS40200D

Mouser Part No
595-TPS40200D

Texas Instruments

Switching Controllers Wide Inp Non-Sync Bu ck DC/DC Cntrlr A 5 A 595-TPS40200DR

Datasheet

1,194Expected 10/9/2026

$3.63

$2.77

$2.46

$2.28

View

Min.: 1
Mult.: 1

Buck

1 Output

35 kHz to 500 kHz

95 %

700 mV to 46 V

3 A

- 40 C

+ 85 C

SMD/SMT

SOIC-8

Tube

Switching Controllers 3-20V Wide Input Syn c Buck Controller A A 595-TPS40303DRCT

TPS40303DRCR
Texas Instruments
1: $3.22
2,966Expected 12/11/2026

Mfr. Part No.
TPS40303DRCR

Mouser Part No
595-TPS40303DRCR

Texas Instruments

Switching Controllers 3-20V Wide Input Syn c Buck Controller A A 595-TPS40303DRCT

Datasheet

2,966Expected 12/11/2026

Cut Tape

$3.22

$2.39

$2.19

$1.96

Reel

$1.63

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Buck

1 Output

300 kHz

90 %

600 mV to 18 V

10 A

- 40 C

+ 125 C

SMD/SMT

VSON-10

Reel, Cut Tape, MouseReel

Switching Controllers MCM- Primary Side FB A 595-UCC28910D A 5 A 595-UCC28910D

UCC28910DR
Texas Instruments
1: $2.24
4,982Expected 26/11/2026

Mfr. Part No.
UCC28910DR

Mouser Part No
595-UCC28910DR

Texas Instruments

Switching Controllers MCM- Primary Side FB A 595-UCC28910D A 5 A 595-UCC28910D

Learn More

Datasheet

4,982Expected 26/11/2026

Cut Tape

$2.24

$1.65

$1.50

$1.32

Reel

$1.07

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Buck, Flyback

1 Output

115 kHz

99 %

5 V

1.26 A

- 40 C

+ 125 C

SMD/SMT

SOIC-7

Reel, Cut Tape, MouseReel

Switching Controllers UCC28911: 700V Flyba ck Switcher A 595-U A 595-UCC28911D

UCC28911DR
Texas Instruments
1: $2.12
4,961Expected 26/8/2026

Mfr. Part No.
UCC28911DR

Mouser Part No
595-UCC28911DR

Texas Instruments

Switching Controllers UCC28911: 700V Flyba ck Switcher A 595-U A 595-UCC28911D

Learn More

Datasheet

4,961Expected 26/8/2026

Cut Tape

$2.12

$1.56

$1.41

$1.25

Reel

$1.03

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Buck, Flyback

1 Output

115 kHz

99 %

5 V

1.2 A

- 40 C

+ 125 C

SMD/SMT

SOIC-7

Reel, Cut Tape, MouseReel

Switching Controllers 42V On-Time PFET Buc k Switch Cntlr A 92 A 926-LM25085MY/NOPB

LM25085MYE/NOPB
Texas Instruments
1: $3.78
4,772Expected 3/9/2026

Mfr. Part No.
LM25085MYE/NOPB

Mouser Part No
926-LM25085MYE/NOPB

Texas Instruments

Switching Controllers 42V On-Time PFET Buc k Switch Cntlr A 92 A 926-LM25085MY/NOPB

Datasheet

4,772Expected 3/9/2026

Cut Tape

$3.78

$2.83

$2.58

$2.33

Reel

$2.15

View

MouseReel Available

Min.: 1
Mult.: 1

: 250

Buck

1 Output

1 MHz

100 %

1.25 V to 42 V

1.75 A

- 40 C

+ 125 C

SMD/SMT

MSOP-PowerPad-8

Reel, Cut Tape, MouseReel

Switching Controllers 75V Constant PFET Bu ck Switch Cntlr A 9 A 926-LM5085MYE/NOPB

LM5085MY/NOPB
Texas Instruments
1: $4.13
4,519On Order

Mfr. Part No.
LM5085MY/NOPB

Mouser Part No
926-LM5085MY/NOPB

Texas Instruments

Switching Controllers 75V Constant PFET Bu ck Switch Cntlr A 9 A 926-LM5085MYE/NOPB

Datasheet

4,519On Order

Cut Tape

$4.13

$3.09

$2.83

$2.54

Reel

$2.24

View

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

MSOP-PowerPad-8

Reel, Cut Tape, MouseReel

Switching Controllers 4V-40V Input Current Mode Sync StpDwn Co

MP2918GL-Z
Monolithic Power Systems (MPS)
1: $2.58
10,000Expected 19/10/2026

Mfr. Part No.
MP2918GL-Z

Mouser Part No
946-MP2918GL-Z

Monolithic Power Systems (MPS)

Switching Controllers 4V-40V Input Current Mode Sync StpDwn Co

Datasheet

10,000Expected 19/10/2026

Cut Tape

$2.58

$1.90

$1.73

$1.55

View

Reel

$1.28

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Buck

1 Output

430 kHz

99.5 %

25 V

13.2 uA

- 40 C

+ 125 C

SMD/SMT

QFN-20

Reel, Cut Tape, MouseReel

Switching Controllers 4V-60V Input, Current Mode,Synchronous Step-Down Controller

MP9928GL-Z
Monolithic Power Systems (MPS)
1: $2.94
4,844Expected 2/9/2026

Mfr. Part No.
MP9928GL-Z

Mouser Part No
946-MP9928GL-Z

Monolithic Power Systems (MPS)

Switching Controllers 4V-60V Input, Current Mode,Synchronous Step-Down Controller

Datasheet

4,844Expected 2/9/2026

Cut Tape

$2.94

$2.18

$1.99

$1.77

View

Reel

$1.47

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Buck

1 Output

300 kHz

99.5 %

24 V

- 40 C

+ 125 C

SMD/SMT

QFN-20

Reel, Cut Tape, MouseReel

Switching Controllers Monolithic SMPS Controller

MIC38C42YN
Microchip Technology
1: $2.33
299Expected 3/9/2026

Mfr. Part No.
MIC38C42YN

Mouser Part No
998-MIC38C42YN

Microchip Technology

Switching Controllers Monolithic SMPS Controller

Datasheet

299Expected 3/9/2026

$2.33

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

Switching Controllers 1MHz Off-Line C Mode PWM & DC/DC Conv

LT1247CS8#PBF
Analog Devices
1: $11.94
100Expected 7/9/2026

Mfr. Part No.
LT1247CS8#PBF

Mouser Part No
584-LT1247CS8#PBF

Analog Devices

Switching Controllers 1MHz Off-Line C Mode PWM & DC/DC Conv

Datasheet

100Expected 7/9/2026

$11.94

$9.25

$8.57

$7.83

View

Min.: 1
Mult.: 1

Buck

1 Output

1 MHz

100 %

5 V

1 A

0 C

+ 100 C

SMD/SMT

SOIC-8

Tube

Switching Controllers L IQ , 60V, Hi Freq Sync Buck Cntr

LTC7800HUDC#PBF
Analog Devices
1: $20.21
91Expected 25/9/2026

Mfr. Part No.
LTC7800HUDC#PBF

Mouser Part No
584-LTC7800HUDCPBF

Analog Devices

Switching Controllers L IQ , 60V, Hi Freq Sync Buck Cntr

Datasheet

91Expected 25/9/2026

$20.21

$15.82

$14.73

$13.52

View

Min.: 1
Mult.: 1

Buck

1 Output

320 kHz to 2.25 MHz

98 %

800 mV to 24 V

20 A

- 40 C

+ 150 C

SMD/SMT

QFN-20

Tube

Switching Controllers High Speed PWM Contr oller

UC3823AN
Texas Instruments
1: $42.13
50Expected 28/12/2026

Mfr. Part No.
UC3823AN

Mouser Part No
595-UC3823AN

Texas Instruments

Switching Controllers High Speed PWM Contr oller

Datasheet

50Expected 28/12/2026

$42.13

$34.07

$32.04

$29.32

View

Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward

1 Output

1 MHz

100 %

5.1 V

2 A

0 C

+ 70 C

Through Hole

PDIP-16

Tube

Switching Controllers 700V Flyback Switche r A 595-UCC28910DR A 595-UCC28910DR

UCC28910D
Texas Instruments
1: $2.64
975Expected 3/12/2026

Mfr. Part No.
UCC28910D

Mouser Part No
595-UCC28910D

Texas Instruments

Switching Controllers 700V Flyback Switche r A 595-UCC28910DR A 595-UCC28910DR

Learn More

Datasheet

975Expected 3/12/2026

$2.64

$1.94

$1.66

$1.54

View

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

Switching Controllers High-Efficiency, 10-Pin MAX, Step-Down Controllers for Notebooks

MAX1791EUB+
Analog Devices / Maxim Integrated
1: $15.44
80Expected 5/10/2026

Mfr. Part No.
MAX1791EUB+

Mouser Part No
700-MAX1791EUB

Analog Devices / Maxim Integrated

Switching Controllers High-Efficiency, 10-Pin MAX, Step-Down Controllers for Notebooks

Datasheet

80Expected 5/10/2026

$15.44

$12.05

$11.19

$10.27

View

Min.: 1
Mult.: 1

Buck

1 Output

300 kHz

100 %

500 mV to 5.5 V

2 A

- 40 C

+ 85 C

SMD/SMT

UMAX-10

Tube

Switching Controllers 12V Green Voltage Mode High Efficiency Synchronous Buck PWM Controller

RT8115CGQW
Richtek
1: $1.18
1,500Expected 15/10/2026

Mfr. Part No.
RT8115CGQW

Mouser Part No
835-RT8115CGQW

Richtek

Switching Controllers 12V Green Voltage Mode High Efficiency Synchronous Buck PWM Controller

Datasheet

1,500Expected 15/10/2026

Cut Tape

$1.18

$0.83

$0.744

$0.65

Reel

$0.54

View

Min.: 1
Mult.: 1

: 1,500

Buck

2 Output

300 kHz

85 %

5 V to 12 V

1.5 A

- 40 C

+ 85 C

SMD/SMT

WDFN-10

Reel, Cut Tape

Switching Controllers Digitally enhanced power analog buck controller

MCP19123-E/MQ
Microchip Technology
1: $8.12
Non-Stocked Lead-Time 11 Weeks

Mfr. Part No.
MCP19123-E/MQ

Mouser Part No
579-MCP19123-E/MQ

Microchip Technology

Switching Controllers Digitally enhanced power analog buck controller

Learn More

Datasheet

Non-Stocked Lead-Time 11 Weeks

$8.12

Min.: 1
Mult.: 1

Buck

1 Output

100 kHz to 1.6 MHz

100 %

300 mV to 16 V

4 A

- 40 C

+ 125 C

SMD/SMT

QFN-28

Tube

Switching Controllers Low Iq Wide Input R ange Synchronous Buc A 595-LM25141RGET

LM25141RGER
Texas Instruments
3,000: $2.22
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
LM25141RGER

Mouser Part No
595-LM25141RGER

Texas Instruments

Switching Controllers Low Iq Wide Input R ange Synchronous Buc A 595-LM25141RGET

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

Reel

$2.22

Min.: 3,000
Mult.: 3,000

: 3,000

Buck

1 Output

440 kHz, 2.2 MHz

99 %

3.3 V, 5 V, 1.5 V to 15 V

20 A

- 40 C

+ 125 C

SMD/SMT

VQFN-24

Reel

Switching Controllers High Perf Sync Buck Controller A 595-LM2 A 595-LM27403SQE/NOPB

LM27403SQX/NOPB
Texas Instruments
4,500: $2.65
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
LM27403SQX/NOPB

Mouser Part No
595-LM27403SQX/NOPB

Texas Instruments

Switching Controllers High Perf Sync Buck Controller A 595-LM2 A 595-LM27403SQE/NOPB

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

Reel

$2.65

Min.: 4,500
Mult.: 4,500

: 4,500

Buck

1 Output

1.05 MHz

93 %

4.7 V

- 40 C

+ 125 C

SMD/SMT

WQFN-24

Reel

Switching Controllers Dual-Ch PWM Control Circuit A 595-TL1454 A 595-TL1454ACPWR

TL1454ACPW
Texas Instruments
270: $8.30
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
TL1454ACPW

Mouser Part No
595-TL1454ACPW

Texas Instruments

Switching Controllers Dual-Ch PWM Control Circuit A 595-TL1454 A 595-TL1454ACPWR

Datasheet

Non-Stocked Lead-Time 9 Weeks

$8.30

$8.21

$8.12

View

Min.: 270
Mult.: 90

Buck, Flyback

2 Output

2 MHz

100 %

20 V

40 mA

- 20 C

+ 85 C

SMD/SMT

TSSOP-16

Tube

Buck Converters for Power Over Ethernet

Customer Service Office

Company

Resources

Support

650 Hz to 80 kHz
35 kHz to 500 kHz
50 kHz to 1 MHz
50 kHz to 300 kHz
50 kHz to 500 kHz
50 kHz to 750 kHz
50 kHz to 850 kHz
50 kHz to 900 kHz
60 kHz
65 kHz
70 kHz
70 kHz to 130 kHz
80 kHz to 600 kHz
100 kHz
100 kHz to 1 MHz
100 kHz to 1.6 MHz
100 kHz to 2.2 MHz
100 kHz to 2.5 MHz
100 kHz to 2.64 MHz
100 kHz to 3 MHz

80 %
81 %
82 %
83 %
84 %
85 %
86 %
87.5 %
88 %
89 %
90 %
91 %
92 %
93 %
95 %
96 %
97 %
98 %
98.75 %
99 %

0 V to 60 V
100 mV to 100 V
300 mV to 16 V
400 mV to 2.5 V
400 mV to 4.73 V
500 mV
500 mV to 1.27 V
500 mV to 3.6 V
500 mV to 5.25 V
500 mV to 5.5 V
591 mV
591 mV to 14.4 V
591 mV to 17 V
600 mV
600 mV to 12.75 V
600 mV to 13.5 V
600 mV to 17 V
600 mV to 18 V
600 mV to 18.6 V
600 mV to 19 V

1 uA
13.2 uA
52.5 uA
65 uA
105 uA
130 uA
180 uA
200 uA
800 uA
1 mA
2 mA
4 mA
5 mA
6 mA
8 mA
20 mA
25 mA
30 mA
37 mA
40 mA

CFP-8
CPAK-20
DFN-10
DFNW-10
DIP-7
DIP-8
GQFN-48
HTQFP-48
HTSSOP-14
HTSSOP-16
HTSSOP-20
HTSSOP-38
LFCSP-20
LFCSP-32
LLP-8
LQFP-48
MLF-12
MLF-16
MLF-32
MSOP-10