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 Constant PFET Bu ck Switch Cntlr A 9 A 926-LM25085MM/NOPB

LM25085MME/NOPB
Texas Instruments
1: $3.78
126In Stock

Mfr. Part No.
LM25085MME/NOPB

Mouser Part No
926-LM25085MME/NOPB

Texas Instruments

Switching Controllers 42V Constant PFET Bu ck Switch Cntlr A 9 A 926-LM25085MM/NOPB

Datasheet

126In Stock

Cut Tape

$3.78

$2.83

$2.58

$2.33

Reel

$2.19

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

VSSOP-8

Reel, Cut Tape, MouseReel

Switching Controllers 42V Constant On-Time PFET Switching Cntl A 926-LM25085QMY/NOPB

LM25085QMYE/NOPB
Texas Instruments
1: $4.28
16In Stock

Mfr. Part No.
LM25085QMYE/NOPB

Mouser Part No
926-LM25085QMYE/NOPB

Texas Instruments

Switching Controllers 42V Constant On-Time PFET Switching Cntl A 926-LM25085QMY/NOPB

Datasheet

16In Stock

Cut Tape

$4.28

$3.21

$2.95

$2.75

Reel

$2.57

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

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Controllers 42V Constant On-Time PFET Switching Cntl A 926-LM25085SD/NOPB

LM25085SDE/NOPB
Texas Instruments
1: $3.25
132In Stock

Mfr. Part No.
LM25085SDE/NOPB

Mouser Part No
926-LM25085SDE/NOPB

Texas Instruments

Switching Controllers 42V Constant On-Time PFET Switching Cntl A 926-LM25085SD/NOPB

Datasheet

132In Stock

Cut Tape

$3.25

$2.41

$2.19

$1.96

Reel

$1.84

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

LLP-8

Reel, Cut Tape, MouseReel

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MHE/NOPB

LM25118MH/NOPB
Texas Instruments
1: $8.79
224In Stock

Mfr. Part No.
LM25118MH/NOPB

Mouser Part No
926-LM25118MH/NOPB

Texas Instruments

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MHE/NOPB

Learn More

Datasheet

224In Stock

$8.79

$6.75

$5.88

$5.60

View

Min.: 1
Mult.: 1

Boost, Buck

1 Output

500 kHz

80 %

1.23 V to 38 V

3.5 A

- 40 C

+ 125 C

SMD/SMT

HTSSOP-20

Tube

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MH/NOPB

LM25118MHE/NOPB
Texas Instruments
1: $9.63
48In Stock
500Expected 31/8/2026

Mfr. Part No.
LM25118MHE/NOPB

Mouser Part No
926-LM25118MHE/NOPB

Texas Instruments

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MH/NOPB

Learn More

Datasheet

48In Stock

500Expected 31/8/2026

Cut Tape

$9.63

$7.40

$6.84

$6.23

Reel

$5.93

View

MouseReel Available

Min.: 1
Mult.: 1

: 250

Boost, Buck

1 Output

500 kHz

80 %

1.23 V to 38 V

3.5 A

- 40 C

+ 125 C

SMD/SMT

HTSSOP-20

Reel, Cut Tape, MouseReel

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MHE/NOPB

LM25118MHX/NOPB
Texas Instruments
1: $8.16
27In Stock
5,000Expected 5/11/2026

Mfr. Part No.
LM25118MHX/NOPB

Mouser Part No
926-LM25118MHX/NOPB

Texas Instruments

Switching Controllers Wide Vltg Range Buck Boost Cntrlr A 926- A 926-LM25118MHE/NOPB

Datasheet

27In Stock

5,000Expected 5/11/2026

Cut Tape

$8.16

$6.22

$5.73

$5.20

View

Reel

$4.57

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Boost, Buck

1 Output

500 kHz

80 %

1.23 V to 38 V

3.5 A

- 40 C

+ 125 C

SMD/SMT

HTSSOP-20

Reel, Cut Tape, MouseReel

Switching Controllers Lo Vtg N-Ch MOSFET S ync Buck Reg Cntlr A 926-LM2743MTCX/NOPB

LM2743MTC/NOPB
Texas Instruments
1: $5.37
3In Stock

Mfr. Part No.
LM2743MTC/NOPB

Mouser Part No
926-LM2743MTC/NOPB

Texas Instruments

Switching Controllers Lo Vtg N-Ch MOSFET S ync Buck Reg Cntlr A 926-LM2743MTCX/NOPB

Datasheet

3In Stock

$5.37

$3.98

$3.50

$3.21

View

Min.: 1
Mult.: 1

Buck

1 Output

50 kHz to 1 MHz

80 %

Adjustable

4 A

- 40 C

+ 125 C

SMD/SMT

TSSOP-14

Tube

Switching Controllers 6V to 42V Synchronou s Step-Down Control A 926-LM3150MHE/NOPB

LM3150MHX/NOPB
Texas Instruments
1: $6.12
2In Stock
7,500Expected 24/8/2026

Mfr. Part No.
LM3150MHX/NOPB

Mouser Part No
926-LM3150MHX/NOPB

Texas Instruments

Switching Controllers 6V to 42V Synchronou s Step-Down Control A 926-LM3150MHE/NOPB

Learn More

Datasheet

2In Stock

7,500Expected 24/8/2026

Cut Tape

$6.12

$4.52

$4.15

$3.75

View

Reel

$3.16

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Buck

1 Output

1 MHz

96 %

600 mV

12 A

- 40 C

+ 125 C

SMD/SMT

HTSSOP-14

Reel, Cut Tape, MouseReel

Switching Controllers Hysteretic PFET Buck Cntlr A 926-LM3485M A 926-LM3485MM/NOPB

LM3485MMX/NOPB
Texas Instruments
1: $2.64
238In Stock
3,500On Order

Mfr. Part No.
LM3485MMX/NOPB

Mouser Part No
926-LM3485MMX/NOPB

Texas Instruments

Switching Controllers Hysteretic PFET Buck Cntlr A 926-LM3485M A 926-LM3485MM/NOPB

Datasheet

238In Stock

3,500On Order

Cut Tape

$2.64

$1.94

$1.77

$1.58

Reel

$1.27

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,500

Buck

1 Output

50 kHz to 1 MHz

100 %

1.242 V to 35 V

4 A

- 40 C

+ 125 C

SMD/SMT

VSSOP-8

Reel, Cut Tape, MouseReel

Switching Controllers Automotive Grade 4.5 -35V Hysteretic Non

LM3485Q1MM/NOPB
Texas Instruments
1: $2.72
701In Stock

Mfr. Part No.
LM3485Q1MM/NOPB

Mouser Part No
926-LM3485Q1MM/NOPB

Texas Instruments

Switching Controllers Automotive Grade 4.5 -35V Hysteretic Non

Datasheet

701In Stock

Cut Tape

$2.72

$2.00

$1.82

$1.63

Reel

$1.40

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Buck

1 Output

50 kHz to 1 MHz

100 %

1.242 V to 35 V

4 A

- 40 C

+ 125 C

SMD/SMT

VSSOP-8

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Controllers Automotive Grade 4.5 -75V Wide Vin Const A 926-LM5085QMYE/NOPB

LM5085QMY/NOPB
Texas Instruments
1: $5.10
364In Stock
3,000On Order

Mfr. Part No.
LM5085QMY/NOPB

Mouser Part No
926-LM5085QMY/NOPB

Texas Instruments

Switching Controllers Automotive Grade 4.5 -75V Wide Vin Const A 926-LM5085QMYE/NOPB

Datasheet

364In Stock

3,000On Order

Cut Tape

$5.10

$3.85

$3.54

$3.18

Reel

$2.77

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

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Controllers 75V Constant PFET Bu ck Switch Cntlr A 9 A 926-LM5085QMY/NOPB

LM5085QMYE/NOPB
Texas Instruments
1: $5.10
362In Stock

Mfr. Part No.
LM5085QMYE/NOPB

Mouser Part No
926-LM5085QMYE/NOPB

Texas Instruments

Switching Controllers 75V Constant PFET Bu ck Switch Cntlr A 9 A 926-LM5085QMY/NOPB

Datasheet

362In Stock

Cut Tape

$5.10

$3.96

$3.62

$3.25

Reel

$3.05

View

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

MSOP-PowerPad-8

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Controllers 4V-60V Input, Curren t Mode, Synchronous

MP9928GF-Z
Monolithic Power Systems (MPS)
1: $3.39
110In Stock
5,000Expected 11/1/2027

Mfr. Part No.
MP9928GF-Z

Mouser Part No
946-MP9928GF-Z

Monolithic Power Systems (MPS)

Switching Controllers 4V-60V Input, Curren t Mode, Synchronous

Datasheet

110In Stock

5,000Expected 11/1/2027

Cut Tape

$3.39

$2.53

$2.31

$2.07

View

Reel

$1.73

Min.: 1
Mult.: 1

: 2,500

Buck

1 Output

300 kHz

99.5 %

24 V

- 40 C

+ 125 C

SMD/SMT

TSSOP-20

Reel, Cut Tape

Switching Controllers 75V DC-DC Buck Controller with HSC

MIC2104YML-TR
Microchip Technology
1: $2.41
175In Stock
5,000Expected 26/10/2026

Mfr. Part No.
MIC2104YML-TR

Mouser Part No
998-MIC2104YMLTR

Microchip Technology

Switching Controllers 75V DC-DC Buck Controller with HSC

Datasheet

175In Stock

5,000Expected 26/10/2026

Cut Tape

$2.41

Reel

$2.41

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

Buck

1 Output

200 kHz to 600 kHz

85 %

800 mV to 24 V

15 A

- 40 C

+ 125 C

SMD/SMT

MLF-16

Reel, Cut Tape, MouseReel

Switching Controllers 76V Synchronous Buck Controller

MIC2176-1YMM
Microchip Technology
1: $3.30
70In Stock

Mfr. Part No.
MIC2176-1YMM

Mouser Part No
998-MIC2176-1YMM

Microchip Technology

Switching Controllers 76V Synchronous Buck Controller

Datasheet

70In Stock

$3.30

Min.: 1
Mult.: 1

Buck

1 Output

100 kHz

96 %

Adjustable

15 A

- 40 C

+ 125 C

SMD/SMT

MSOP-10

Tube

Switching Controllers 76V Synchronous Buck Controller

MIC2176-2YMM
Microchip Technology
1: $3.30
5In Stock
200Expected 31/8/2026

Mfr. Part No.
MIC2176-2YMM

Mouser Part No
998-MIC2176-2YMM

Microchip Technology

Switching Controllers 76V Synchronous Buck Controller

Datasheet

5In Stock

200Expected 31/8/2026

$3.30

Min.: 1
Mult.: 1

Buck

1 Output

100 kHz

96 %

Adjustable

15 A

- 40 C

+ 125 C

SMD/SMT

MSOP-10

Tube

Switching Controllers 3V Buck Contoller

MIC2194YM
Microchip Technology
1: $3.90
175In Stock

Mfr. Part No.
MIC2194YM

Mouser Part No
998-MIC2194YM

Microchip Technology

Switching Controllers 3V Buck Contoller

Datasheet

175In Stock

$3.90

Min.: 1
Mult.: 1

Buck

1 Output

400 kHz

100 %

Adjustable

- 40 C

+ 125 C

SMD/SMT

SOP-8

Tube

Switching Controllers 300KHz Sync Buck Controller

MIC2199YML
Microchip Technology
1: $5.59
147In Stock

Mfr. Part No.
MIC2199YML

Mouser Part No
998-MIC2199YML

Microchip Technology

Switching Controllers 300KHz Sync Buck Controller

Datasheet

147In Stock

$5.59

Min.: 1
Mult.: 1

Buck

1 Output

300 kHz

85 %

800 mV to 6 V

20 A

- 40 C

+ 125 C

SMD/SMT

MLF-12

Tube

Switching Controllers Monolithic SMPS Controller

MIC38C43AYM
Microchip Technology
1: $3.29
204In Stock

Mfr. Part No.
MIC38C43AYM

Mouser Part No
998-MIC38C43AYM

Microchip Technology

Switching Controllers Monolithic SMPS Controller

Datasheet

204In Stock

$3.29

Min.: 1
Mult.: 1

Boost, Buck

1 Output

500 kHz

96 %

5 V

500 mA

- 40 C

+ 85 C

SMD/SMT

SOIC-8

Tube

Switching Controllers Monolithic SMPS Controller

MIC38C43YM
Microchip Technology
1: $1.74
430In Stock

Mfr. Part No.
MIC38C43YM

Mouser Part No
998-MIC38C43YM

Microchip Technology

Switching Controllers Monolithic SMPS Controller

Datasheet

430In Stock

$1.74

$1.46

$1.39

Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward

1 Output

500 kHz

96 %

5 V

500 mA

- 40 C

+ 85 C

SMD/SMT

SOIC-8

Tube

Switching Controllers Monolithic High Speed SMPS Controller

MIC38HC43YM
Microchip Technology
1: $2.58
78In Stock

Mfr. Part No.
MIC38HC43YM

Mouser Part No
998-MIC38HC43YM

Microchip Technology

Switching Controllers Monolithic High Speed SMPS Controller

Datasheet

78In Stock

$2.58

Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward

1 Output

500 kHz

96 %

5 V

1 A

- 40 C

+ 85 C

SMD/SMT

SOIC-8

Tube

Switching Controllers 4.5V-18V Input Synch Buck Cntrlr ALT 595 ALT 595-TPS40193DRCR

TPS40193DRCRG4
Texas Instruments
1: $4.71
305In Stock

Mfr. Part No.
TPS40193DRCRG4

Mouser Part No
595-TPS40193DRCRG4

Texas Instruments

Switching Controllers 4.5V-18V Input Synch Buck Cntrlr ALT 595 ALT 595-TPS40193DRCR

Datasheet

Product Comments

305In Stock

Cut Tape

$4.71

$3.51

$3.20

$2.87

Reel

$2.45

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Buck

1 Output

300 kHz

85 %

4.5 V to 18 V

20 A

- 40 C

+ 85 C

SMD/SMT

VSON-10

Reel, Cut Tape, MouseReel

Switching Controllers Dual Ch Sync Step-Do wn A 595-TPS5124DBT A 595-TPS5124DBT

TPS5124DBTR
Texas Instruments
1: $9.22
34In Stock

Mfr. Part No.
TPS5124DBTR

Mouser Part No
595-TPS5124DBTR

Texas Instruments

Switching Controllers Dual Ch Sync Step-Do wn A 595-TPS5124DBT A 595-TPS5124DBT

Datasheet

34In Stock

Cut Tape

$9.22

$7.07

$6.53

$5.94

View

Reel

$5.47

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Buck

2 Output

500 kHz

80 %

900 mV to 12 V

20 A

- 40 C

+ 85 C

SMD/SMT

TSSOP-30

Reel, Cut Tape, MouseReel

Switching Controllers High Speed PWM Contr oller ALT 595-UC382 ALT 595-UC3823N

UC3823NG4
Texas Instruments
1: $11.48
89In Stock

Mfr. Part No.
UC3823NG4

Mouser Part No
595-UC3823NG4

Texas Instruments

Switching Controllers High Speed PWM Contr oller ALT 595-UC382 ALT 595-UC3823N

Datasheet

Product Comments

89In Stock

$11.48

$8.89

$8.24

$7.53

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 Low-Power BiCMOS Cur rent-Mode PWM

UCC3802PW
Texas Instruments
1: $5.86
288In Stock

Mfr. Part No.
UCC3802PW

Mouser Part No
595-UCC3802PW

Texas Instruments

Switching Controllers Low-Power BiCMOS Cur rent-Mode PWM

Datasheet

288In Stock

$5.86

$4.42

$4.07

$3.67

View

Min.: 1
Mult.: 1

Boost, Buck, Flyback, Forward

1 Output

1 MHz

100 %

5 V

1 A

0 C

+ 70 C

SMD/SMT

TSSOP-8

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