Voltage Regulators - Switching Regulators

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MPQ4323 42V Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4323 42V Synchronous Step-Down Converters are frequency-configurable (350kHz to 2.5MHz) step-down switching regulators. These devices feature integrated internal high-side and low-side power MOSFETs. The MPQ4323 regulators provide 3A of highly efficient output current with peak current mode control. The wide 3.3V to 36V input voltage range and 42V load dump tolerance accommodate a variety of step-down applications in automotive input environments. The MPQ4323 synchronous step-down converters offer a 1μA shutdown current (ISD) for battery-powered applications.

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Part #

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

MPQ4323CGDE-AEC1-P
Monolithic Power Systems (MPS)
1: $4.51
870In Stock

Mfr. Part #
MPQ4323CGDE-AEC1-P

Mouser Part #
946-MPQ4323CGDEAEC1P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

Learn More

Datasheet

870In Stock

Cut Tape

$4.51

$3.38

$3.09

$2.78

Reel

$2.32

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-33-AEC1-P
Monolithic Power Systems (MPS)
1: $4.51
858In Stock

Mfr. Part #
MPQ4323GDE-33-AEC1-P

Mouser Part #
946-MPQ4323GDE-33P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Datasheet

858In Stock

Cut Tape

$4.51

$3.38

$3.09

$2.78

Reel

$2.59

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-12

Buck

3.3 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-38-AEC1-P
Monolithic Power Systems (MPS)
1: $4.51
490In Stock

Mfr. Part #
MPQ4323GDE-38-AEC1-P

Mouser Part #
946-MPQ4323GDE-38P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Datasheet

490In Stock

Cut Tape

$4.51

$3.38

$3.09

$2.78

Reel

$2.53

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-12

Buck

3.8 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

MPQ4323CGRHE-AEC1-P
Monolithic Power Systems (MPS)
1: $4.65
490In Stock

Mfr. Part #
MPQ4323CGRHE-AEC1-P

Mouser Part #
946-PQ4323CGRHEAEC1P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

Learn More

Datasheet

490In Stock

Cut Tape

$4.65

$3.48

$3.19

$2.87

Reel

$2.61

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-14

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-AEC1-Z
Monolithic Power Systems (MPS)
1: $3.96
4,104In Stock

Mfr. Part #
MPQ4323GDE-AEC1-Z

Mouser Part #
946-MPQ4323GDE-AEC1Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Learn More

Datasheet

4,104In Stock

Cut Tape

$3.96

$2.96

$2.70

$2.43

View

Reel

$2.01

Min.: 1
Mult.: 1

Reel: 5,000

SMD/SMT

QFN-12

Buck

800 mV to 32.4 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

MPQ4323MGQCE-AEC1-P
Monolithic Power Systems (MPS)
1: $5.17
485In Stock

Mfr. Part #
MPQ4323MGQCE-AEC1-P

Mouser Part #
946-PQ4323MGQCEAEC1P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

Learn More

Datasheet

485In Stock

Cut Tape

$5.17

$3.90

$3.58

$3.22

Reel

$2.93

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-AEC1-P
Monolithic Power Systems (MPS)
1: $4.51
420In Stock
500Expected 2026-11-18

Mfr. Part #
MPQ4323GDE-AEC1-P

Mouser Part #
946-MPQ4323GDE-AEC1P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Learn More

Datasheet

420In Stock

500Expected 2026-11-18

Cut Tape

$4.51

$3.38

$3.09

$2.78

Reel

$2.53

View

Min.: 1
Mult.: 1

Reel: 500

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel, Cut Tape

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

MPQ4323CGDE-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $2.03
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323CGDE-AEC1-Z

Mouser Part #
946-MPQ4323CGDEAEC1Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

Learn More

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$2.03

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-33-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $2.03
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323GDE-33-AEC1-Z

Mouser Part #
946-MPQ4323GDE-33Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$2.03

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-12

Buck

3.3 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

MPQ4323GDE-38-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $2.03
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323GDE-38-AEC1-Z

Mouser Part #
946-MPQ4323GDE-38Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$2.03

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-12

Buck

3.8 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

MPQ4323GLE-AEC1-P
Monolithic Power Systems (MPS)
500: $2.61
Non-Stocked

Mfr. Part #
MPQ4323GLE-AEC1-P

Mouser Part #
946-MPQ4323GLEAEC1P

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

Learn More

Datasheet

Non-Stocked

Reel

$2.61

$2.47

$2.39

$2.36

Min.: 500
Mult.: 500

Reel: 500

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

MPQ4323GLE-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $2.10
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323GLE-AEC1-Z

Mouser Part #
946-MPQ4323GLEAEC1Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

Learn More

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$2.10

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

20 uA

2.2 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

MPQ4323CGRHE-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $1.95
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323CGRHE-AEC1-Z

Mouser Part #
946-PQ4323CGRHEAEC1Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A

Learn More

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$1.95

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-14

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

MPQ4323MGQCE-AEC1-Z
Monolithic Power Systems (MPS)
5,000: $2.38
Non-Stocked Lead-Time 22 Weeks

Mfr. Part #
MPQ4323MGQCE-AEC1-Z

Mouser Part #
946-PQ4323MGQCEAEC1Z

Monolithic Power Systems (MPS)

Switching Voltage Regulators 42V Load Dump Tolerant, 3A, Ultra-Compact,

Learn More

Datasheet

Non-Stocked Lead-Time 22 Weeks

Reel

$2.38

Min.: 5,000
Mult.: 5,000

Reel: 5,000

SMD/SMT

QFN-12

Buck

42 V

3 A

1 Output

1 uA

350 kHz to 2.5 MHz

- 40 C

+ 150 C

AEC-Q100

MPQ4323

Reel

MPQ4323 42V Synchronous Step-Down Converters

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