Voltage Regulators - Switching Regulators

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MAX20404/MAX20405/MAX20406 Buck Converters

Analog Devices MAX20404 / MAX20405 / MAX20406 Automotive Synchronous Buck Converters offer a tiny size with integrated high-side and low-side switches. The series delivers up to 6A with wide input voltages ranging from 3V to 36V. Voltage quality can be monitored by observing the PGOOD signal. The modules operate in dropout mode by running at a 99% duty cycle. This makes the device suitable for automotive and industrial applications. Analog Devices MAX20404 / MAX20405 / MAX20406 Automotive Synchronous Buck Converters support programmable or fixed output voltages of 5V and 3.3V. The device has an internally fixed frequency at 2.1MHz (or 400KHz or 3MHz), allowing for small external components, reduced output ripple, and ensuring no AM interference. The converter automatically enters skip mode at light loads with an ultra-low quiescent current of 10μA at no load.

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Part #

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOE/VY+
Analog Devices / Maxim Integrated
1: $4.95
563In Stock

Mfr. Part No.
MAX20406AFOE/VY+

Mouser Part No
700-MAX20406AFOE/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

563In Stock

$4.95

$3.77

$3.47

$3.15

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Boost

5 V

6 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

MAX20406

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOA/VY+
Analog Devices / Maxim Integrated
1: $4.52
591In Stock

Mfr. Part No.
MAX20404AFOA/VY+

Mouser Part No
700-MAX20404AFOA/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

591In Stock

$4.52

$3.43

$3.15

$2.85

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

5 V

4 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOD/VY+
Analog Devices / Maxim Integrated
1: $5.28
819In Stock

Mfr. Part No.
MAX20405AFOD/VY+

Mouser Part No
700-MAX20405AFOD/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

819In Stock

$5.28

$3.71

$3.51

$3.33

View

Min.: 1
Mult.: 1

SMD/SMT

WFQFN-17

Buck

10 V

5 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOD/VY+
Analog Devices / Maxim Integrated
1: $4.95
819In Stock

Mfr. Part No.
MAX20406AFOD/VY+

Mouser Part No
700-MAX20406AFOD/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

819In Stock

$4.95

$3.77

$3.47

$3.15

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

6 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20406

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOF/VY+
Analog Devices / Maxim Integrated
1: $4.79
423In Stock

Mfr. Part No.
MAX20405AFOF/VY+

Mouser Part No
700-MAX20405AFOF/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

423In Stock

$4.79

$3.65

$3.36

$3.04

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

5 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOB/VY+T
Analog Devices / Maxim Integrated
1: $4.52
1,361In Stock
2,500Expected 2026/09/21

Mfr. Part No.
MAX20404AFOB/VY+T

Mouser Part No
700-MAX20404AFOBVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

1,361In Stock

2,500Expected 2026/09/21

Cut Tape

$4.52

$3.43

$3.16

$2.86

View

Reel

$2.44

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

FC2QFN-17

Buck

3.3 V

4 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOB/VY+
Analog Devices / Maxim Integrated
1: $4.79
706In Stock

Mfr. Part No.
MAX20405AFOB/VY+

Mouser Part No
700-MAX20405AFOB/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

706In Stock

$4.79

$3.65

$3.36

$3.04

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

5 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOA/VY+T
Analog Devices / Maxim Integrated
1: $5.01
1,233In Stock

Mfr. Part No.
MAX20406AFOA/VY+T

Mouser Part No
700-MAX20406AFOAVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

1,233In Stock

Cut Tape

$5.01

$3.83

$3.52

$3.19

View

Reel

$2.83

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

FC2QFN-17

Boost

5 V

6 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOD/VY+
Analog Devices / Maxim Integrated
1: $4.52
1,684In Stock

Mfr. Part No.
MAX20404AFOD/VY+

Mouser Part No
700-MAX20404AFOD/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

1,684In Stock

$4.52

$3.43

$3.16

$2.86

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

4 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOA/VY+
Analog Devices / Maxim Integrated
1: $4.79
694In Stock

Mfr. Part No.
MAX20405AFOA/VY+

Mouser Part No
700-MAX20405AFOA/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

694In Stock

$4.79

$3.65

$3.36

$3.04

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Boost

5 V

5 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOA/VY+
Analog Devices / Maxim Integrated
1: $5.09
1,343In Stock
2,940Expected 2026/06/29

Mfr. Part No.
MAX20406AFOA/VY+

Mouser Part No
700-MAX20406AFOA/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

1,343In Stock

2,940Expected 2026/06/29

$5.09

$3.88

$3.58

$3.24

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

5 V

6 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOB/VY+T
Analog Devices / Maxim Integrated
1: $5.01
833In Stock

Mfr. Part No.
MAX20406AFOB/VY+T

Mouser Part No
700-MAX20406AFOBVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

833In Stock

Cut Tape

$5.01

$3.83

$3.52

$3.19

View

Reel

$2.83

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

FC2QFN-17

Boost

3.3 V

6 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOB/VY+
Analog Devices / Maxim Integrated
1: $4.52
392In Stock

Mfr. Part No.
MAX20404AFOB/VY+

Mouser Part No
700-MAX20404AFOB/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

392In Stock

$4.52

$3.43

$3.16

$2.86

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

4 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

MAX20404/MAX20405/ MAX20406

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOE/VY+
Analog Devices / Maxim Integrated
1: $4.52
235In Stock

Mfr. Part No.
MAX20404AFOE/VY+

Mouser Part No
700-MAX20404AFOE/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

235In Stock

$4.52

$3.43

$3.16

$2.86

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

800 mV to 10 V

4 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOC/VY+
Analog Devices / Maxim Integrated
1: $4.79
205In Stock
420Expected 2026/06/26

Mfr. Part No.
MAX20405AFOC/VY+

Mouser Part No
700-MAX20405AFOC/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

205In Stock

420Expected 2026/06/26

$4.79

$3.65

$3.36

$3.04

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

5 V

5 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20405

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOC/VY+
Analog Devices / Maxim Integrated
1: $5.01
393In Stock

Mfr. Part No.
MAX20406AFOC/VY+

Mouser Part No
700-MAX20406AFOC/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

393In Stock

$5.01

$3.83

$3.52

$3.19

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

5 V

6 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOA/VY+T
Analog Devices / Maxim Integrated
1: $4.52
407In Stock
2,500Expected 2026/09/17

Mfr. Part No.
MAX20404AFOA/VY+T

Mouser Part No
700-MAX20404AFOAVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

407In Stock

2,500Expected 2026/09/17

Cut Tape

$4.52

$3.43

$3.16

$2.86

View

Reel

$2.44

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

FC2QFN-17

Buck

5 V

4 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

Reel, Cut Tape

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOC/VY+
Analog Devices / Maxim Integrated
1: $4.52
64In Stock

Mfr. Part No.
MAX20404AFOC/VY+

Mouser Part No
700-MAX20404AFOC/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

64In Stock

$4.52

$3.43

$3.16

$2.86

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

5 V

4 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20404

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOB/VY+
Analog Devices / Maxim Integrated
1: $4.71
405In Stock

Mfr. Part No.
MAX20406AFOB/VY+

Mouser Part No
700-MAX20406AFOB/VY+

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

405In Stock

$4.71

$3.66

$3.40

$3.11

View

Min.: 1
Mult.: 1

SMD/SMT

FC2QFN-17

Buck

3.3 V

6 A

1 Output

10 uA

2.1 MHz

- 40 C

+ 125 C

MAX20404/MAX20405/ MAX20406

Tray

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOC/VY+T
Analog Devices / Maxim Integrated
1: $5.01
85In Stock

Mfr. Part No.
MAX20406AFOC/VY+T

Mouser Part No
700-MAX20406AFOCVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

85In Stock

Cut Tape

$5.01

$3.83

$3.52

$3.19

View

Reel

$2.78

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

FC2QFN-17

Buck

5 V

6 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

Reel, Cut Tape

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOC/VY+T
Analog Devices / Maxim Integrated
2,500: $2.40
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
MAX20404AFOC/VY+T

Mouser Part No
700-20404AFOC/VY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

Non-Stocked Lead-Time 10 Weeks

Reel

$2.40

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

FC2QFN-17

Buck

5 V

4 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20404

Reel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20405AFOC/VY+T
Analog Devices / Maxim Integrated
2,500: $2.71
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
MAX20405AFOC/VY+T

Mouser Part No
700-20405AFOC/VY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

Non-Stocked Lead-Time 10 Weeks

Reel

$2.71

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

FC2QFN-17

Boost

5 V

5 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20405

Reel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOD/VY+T
Analog Devices / Maxim Integrated
2,500: $2.88
Non-Stocked Lead-Time 11 Weeks

Mfr. Part No.
MAX20406AFOD/VY+T

Mouser Part No
700-20406AFOD/VY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

Non-Stocked Lead-Time 11 Weeks

Reel

$2.88

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

FC2QFN-17

Boost

3.3 V

6 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

MAX20406

Reel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20406AFOE/VY+T
Analog Devices / Maxim Integrated
2,500: $2.73
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
MAX20406AFOE/VY+T

Mouser Part No
700-20406AFOE/VY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$2.73

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

FC2QFN-17

Boost

5 V

6 A

1 Output

10 uA

3 MHz

- 40 C

+ 125 C

MAX20406

Reel

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

MAX20404AFOD/VY+T
Analog Devices / Maxim Integrated
2,500: $2.40
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
MAX20404AFOD/VY+T

Mouser Part No
700-MAX20404AFODVY+T

Analog Devices / Maxim Integrated

Switching Voltage Regulators 36V 4A/5A/6A Sync Low Iq Buck Converter

Learn More

Datasheet

Non-Stocked Lead-Time 10 Weeks

Reel

$2.40

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

FC2QFN-17

Buck

3.3 V

4 A

1 Output

10 uA

400 kHz

- 40 C

+ 125 C

Reel

MAX20404/MAX20405/MAX20406 Buck Converters

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