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 Hi Speed C Mode Pulse Width Mods

LT1242CN8#PBF
Analog Devices
1: $9.89
33In Stock

Mfr. Part No.
LT1242CN8#PBF

Mouser Part No
584-LT1242CN8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

33In Stock

$9.89

$7.63

$6.70

$6.23

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

0 C

+ 100 C

Through Hole

PDIP-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1242IS8#PBF
Analog Devices
1: $12.24
75In Stock
100Expected 28/8/2026

Mfr. Part No.
LT1242IS8#PBF

Mouser Part No
584-LT1242IS8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

75In Stock

100Expected 28/8/2026

$12.24

$9.51

$8.83

$7.85

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

- 40 C

+ 100 C

SMD/SMT

SOIC-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1243IN8#PBF
Analog Devices
1: $11.00
140In Stock

Mfr. Part No.
LT1243IN8#PBF

Mouser Part No
584-LT1243IN8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

140In Stock

$11.00

$8.53

$7.52

$7.36

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

- 40 C

+ 100 C

Through Hole

PDIP-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1243IS8#PBF
Analog Devices
1: $12.24
208In Stock

Mfr. Part No.
LT1243IS8#PBF

Mouser Part No
584-LT1243IS8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

208In Stock

$12.24

$9.51

$8.74

$8.06

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

- 40 C

+ 100 C

SMD/SMT

SOIC-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1244CN8#PBF
Analog Devices
1: $9.89
69In Stock

Mfr. Part No.
LT1244CN8#PBF

Mouser Part No
584-LT1244CN8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

69In Stock

$9.89

$7.63

$6.70

$6.23

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

0 C

+ 100 C

Through Hole

PDIP-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1244CS8#PBF
Analog Devices
1: $11.30
100In Stock

Mfr. Part No.
LT1244CS8#PBF

Mouser Part No
584-LT1244CS8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

100In Stock

$11.30

$8.76

$8.12

$7.41

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

0 C

+ 100 C

SMD/SMT

SOIC-8

Tube

Switching Controllers Hi Speed C Mode Pulse Width Mods

LT1245CS8#PBF
Analog Devices
1: $11.30
113In Stock

Mfr. Part No.
LT1245CS8#PBF

Mouser Part No
584-LT1245CS8#PBF

Analog Devices

Switching Controllers Hi Speed C Mode Pulse Width Mods

Datasheet

113In Stock

$11.30

$8.76

$8.12

$7.40

View

Min.: 1
Mult.: 1

Buck

1 Output

500 kHz

96 %

5 V

1 A

0 C

+ 100 C

SMD/SMT

SOIC-8

Tube

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

LT1246CS8#PBF
Analog Devices
1: $12.81
126In Stock

Mfr. Part No.
LT1246CS8#PBF

Mouser Part No
584-LT1246CS8#PBF

Analog Devices

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

Datasheet

126In Stock

$12.81

$9.26

$9.25

$7.56

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 Hi Pwr Sync DC/DC Cntr

LT1339CN#PBF
Analog Devices
1: $23.81
50In Stock

Mfr. Part No.
LT1339CN#PBF

Mouser Part No
584-LT1339CN#PBF

Analog Devices

Switching Controllers Hi Pwr Sync DC/DC Cntr

Datasheet

50In Stock

$23.81

$18.09

$17.26

$16.05

View

Min.: 1
Mult.: 1

Boost, Buck

1 Output

150 kHz

90 %

Adjustable

30 A

0 C

+ 70 C

Through Hole

PDIP-20

Tube

Switching Controllers Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection

LT8228EFE#PBF
Analog Devices
1: $26.66
7In Stock
50Expected 3/2/2027

Mfr. Part No.
LT8228EFE#PBF

Mouser Part No
584-LT8228EFE#PBF

Analog Devices

Switching Controllers Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection

Learn More

Datasheet

7In Stock

50Expected 3/2/2027

$26.66

$21.24

$19.07

$18.39

View

Min.: 1
Mult.: 1

Boost, Buck

1 Output

80 kHz to 600 kHz

95 %

100 V

40 A

- 40 C

+ 125 C

SMD/SMT

TSSOP-38

Tube

Switching Controllers 3.3V In Hi Pwr Buck Sw Reg Cntr

LTC1649CS#PBF
Analog Devices
1: $20.66
16In Stock
50Expected 24/8/2026

Mfr. Part No.
LTC1649CS#PBF

Mouser Part No
584-LTC1649CS#PBF

Analog Devices

Switching Controllers 3.3V In Hi Pwr Buck Sw Reg Cntr

Datasheet

16In Stock

50Expected 24/8/2026

$20.66

$16.33

$14.55

$13.75

View

Min.: 1
Mult.: 1

Buck

1 Output

200 kHz

99 %

1.26 V to 2.5 V

10 A

0 C

+ 70 C

SMD/SMT

SOIC-16

Tube

Switching Controllers 2x Out PolyPhBuck Cntr w/ Sub-Milliohm D

LTC3884EUK#PBF
Analog Devices
1: $25.92
5In Stock

Mfr. Part No.
LTC3884EUK#PBF

Mouser Part No
584-LTC3884EUK#PBF

Analog Devices

Switching Controllers 2x Out PolyPhBuck Cntr w/ Sub-Milliohm D

Learn More

Datasheet

5In Stock

$25.92

$20.64

$18.48

$17.82

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

Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr

LTC3894HFE#PBF
Analog Devices
1: $13.80
184In Stock
296Expected 25/11/2026

Mfr. Part No.
LTC3894HFE#PBF

Mouser Part No
584-LTC3894HFE#PBF

Analog Devices

Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr

Learn More

Datasheet

184In Stock

296Expected 25/11/2026

$13.80

$10.77

$9.33

$9.19

View

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

Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr

LTC3894IFE#PBF
Analog Devices
1: $12.85
74In Stock

Mfr. Part No.
LTC3894IFE#PBF

Mouser Part No
584-LTC3894IFE#PBF

Analog Devices

Switching Controllers 150V Low IQ Step-Dwn DC/DC Ctlr

Learn More

Datasheet

74In Stock

$12.85

$10.00

$8.65

$8.32

View

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

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

LTC7801EUFD#PBF
Analog Devices
1: $17.88
23In Stock
803On Order

Mfr. Part No.
LTC7801EUFD#PBF

Mouser Part No
584-LTC7801EUFDPBF

Analog Devices

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

Datasheet

23In Stock

803On Order

$17.88

$14.08

$12.27

$11.83

View

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

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

LTC7801HUFD#PBF
Analog Devices
1: $22.14
Lead-Time 18 Weeks

Mfr. Part No.
LTC7801HUFD#PBF

Mouser Part No
584-LTC7801HUFDPBF

Analog Devices

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

Datasheet

Lead-Time 18 Weeks

$22.14

$17.34

$16.13

$14.27

View

Min.: 1
Mult.: 1

Buck

1 Output

50 kHz to 900 kHz

100 %

800 mV to 60 V

10 A

- 40 C

+ 150 C

SMD/SMT

QFN-24

Tube

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

LTC7801IFE#PBF
Analog Devices
1: $20.74
71In Stock

Mfr. Part No.
LTC7801IFE#PBF

Mouser Part No
584-LTC7801IFEPBF

Analog Devices

Switching Controllers 150V L IQ, Sync Buck DC/DC Cntr

Datasheet

71In Stock

$20.74

$16.40

$14.47

$13.91

View

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

Switching Controllers 40V, Low Iq Dual Phse Sych Stp-Dwn Cntlr

LTC7802EUFDM#PBF
Analog Devices
1: $9.48
146In Stock

Mfr. Part No.
LTC7802EUFDM#PBF

Mouser Part No
584-LTC7802EUFDM#PBF

Analog Devices

Switching Controllers 40V, Low Iq Dual Phse Sych Stp-Dwn Cntlr

Learn More

Datasheet

146In Stock

$9.48

$7.29

$6.32

$6.07

View

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

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

LTC7810HLXE#PBF
Analog Devices
1: $25.73
5In Stock
750On Order

Mfr. Part No.
LTC7810HLXE#PBF

Mouser Part No
584-LTC7810HLXEPBF

Analog Devices

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

Learn More

Datasheet

5In Stock

750On Order

$25.73

$20.48

$19.18

$17.73

View

Min.: 1
Mult.: 1

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

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

LTC7810ILXE#PBF
Analog Devices
1: $24.41
90In Stock
250Expected 25/9/2026

Mfr. Part No.
LTC7810ILXE#PBF

Mouser Part No
584-LTC7810ILXEPBF

Analog Devices

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

Learn More

Datasheet

90In Stock

250Expected 25/9/2026

$24.41

$19.41

$18.14

$16.77

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 L IQ, 38V Sync Boost+Buck Cntr

LTC7812EUH#PBF
Analog Devices
1: $17.12
73In Stock

Mfr. Part No.
LTC7812EUH#PBF

Mouser Part No
584-LTC7812EUH#PBF

Analog Devices

Switching Controllers L IQ, 38V Sync Boost+Buck Cntr

Learn More

Datasheet

73In Stock

$17.12

$13.45

$11.72

$11.14

View

Min.: 1
Mult.: 1

Boost, Buck

2 Output

850 kHz

100 %

800 mV to 60 V

20 A

- 40 C

+ 125 C

SMD/SMT

QFN-32

Tube

Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S

LTC7815IUHF#PBF
Analog Devices
1: $18.75
2In Stock

Mfr. Part No.
LTC7815IUHF#PBF

Mouser Part No
584-LTC7815IUHF#PBF

Analog Devices

Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S

Learn More

Datasheet

2In Stock

$18.75

$14.78

$13.15

$12.38

View

Min.: 1
Mult.: 1

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

Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MH/NOPB

LM25118Q1MHE/NOPB
Texas Instruments
1: $11.00
229In Stock

Mfr. Part No.
LM25118Q1MHE/NOPB

Mouser Part No
595-LM25118Q1MHENOPB

Texas Instruments

Switching Controllers Wide Vtg Range Buck- Boost Cntlr A 595-L A 595-LM25118Q1MH/NOPB

Learn More

Datasheet

229In Stock

Cut Tape

$11.00

$8.53

$7.90

$7.22

Reel

$6.46

View

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

Switching Controllers 42-V automotive sync hronous buck DC/DC

LM25149QRGYRQ1
Texas Instruments
1: $6.31
35In Stock
3,000Expected 22/10/2026

Mfr. Part No.
LM25149QRGYRQ1

Mouser Part No
595-LM25149QRGYRQ1

Texas Instruments

Switching Controllers 42-V automotive sync hronous buck DC/DC

Learn More

Datasheet

35In Stock

3,000Expected 22/10/2026

Cut Tape

$6.31

$4.77

$4.39

$3.97

View

Reel

$3.41

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

Switching Controllers Wide Input Range Syn c Buck Cntlr A 595- A 595-LM5117QPSQE/NOPB

LM5117QPSQ/NOPB
Texas Instruments
1: $10.84
213In Stock

Mfr. Part No.
LM5117QPSQ/NOPB

Mouser Part No
595-LM5117QPSQ/NOPB

Texas Instruments

Switching Controllers Wide Input Range Syn c Buck Cntlr A 595- A 595-LM5117QPSQE/NOPB

Datasheet

213In Stock

Cut Tape

$10.84

$9.22

$8.04

$7.92

Reel

$6.94

$6.77

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

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