Voltage Regulators - Switching Regulators

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BD9S Series Automotive Buck DC-DC Converters

ROHM Semiconductor BD9S Automotive Buck DC-DC Converters provide high-reliability and low power consumption in a compact form factor with a temperature range of -40°C to +125°C. The BD9S DC-DC Converters feature current-mode control, ensuring fast response to load transients. A fixed 2.2MHz switching frequency prevents interference in the AM Band. This high frequency also allows the use of smaller external components, contributing to a higher degree of miniaturization and power savings. The BD9S Converters also include an enable function to adjust the startup time and a built-in output (Power Good function) indicating correct output voltage has been achieved. These AEC-Q100 qualified (Grade 1) devices support output currents from 0.6A to 4.0A for design flexibility.

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Part #

Switching Voltage Regulators Sync Buck DC/DC Conv 2A MOSFET; 2.7-5.5V

BD9S200MUF-CE2
ROHM Semiconductor
1: $3.02
7,520In Stock

Mfr. Part No.
BD9S200MUF-CE2

Mouser Part No
755-BD9S200MUF-CE2

ROHM Semiconductor

Switching Voltage Regulators Sync Buck DC/DC Conv 2A MOSFET; 2.7-5.5V

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Datasheet

Product Comments

7,520In Stock

Cut Tape

$3.02

$2.24

$2.04

$1.84

Reel

$1.54

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

SMD/SMT

VQFNFV3030-EP-16

Buck

800 mV to 4.4 V

2 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 0.6A Output, 2.2MHz Op Frequency, -40+125

BD9S000NUX-CE2
ROHM Semiconductor
1: $1.92
3,082In Stock

Mfr. Part No.
BD9S000NUX-CE2

Mouser Part No
755-BD9S000NUX-CE2

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 0.6A Output, 2.2MHz Op Frequency, -40+125

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Datasheet

Product Comments

3,082In Stock

Cut Tape

$1.92

$1.40

$1.26

$1.12

View

Reel

$0.923

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

SMD/SMT

VSON-8

Buck

800 mV to 5.5 V

600 mA

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 1.8V(Typ), 1.0A Output, 2.2MHz Op Frequency, -40+125

BD9S111NUX-CE2
ROHM Semiconductor
1: $2.48
2,935In Stock

Mfr. Part No.
BD9S111NUX-CE2

Mouser Part No
755-BD9S111NUX-CE2

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 1.8V(Typ), 1.0A Output, 2.2MHz Op Frequency, -40+125

Learn More

Datasheet

Product Comments

2,935In Stock

Cut Tape

$2.48

$1.82

$1.66

$1.47

View

Reel

$1.24

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

SMD/SMT

VSON-8

Buck

1.8 V

1 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators Sync Buck DC/DC Conv 4A MOSFET; 2.7-5.5V

BD9S400MUF-CE2
ROHM Semiconductor
1: $4.03
2,560In Stock

Mfr. Part No.
BD9S400MUF-CE2

Mouser Part No
755-BD9S400MUF-CE2

ROHM Semiconductor

Switching Voltage Regulators Sync Buck DC/DC Conv 4A MOSFET; 2.7-5.5V

Learn More

Datasheet

Product Comments

2,560In Stock

Cut Tape

$4.03

$3.06

$2.75

$2.48

Reel

$2.14

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

SMD/SMT

VQFNFV3030-EP-16

Buck

800 mV to 4.4 V

4 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 1.0A Output, 2.2MHz Op Frequency, -40+125

BD9S109NUX-CE2
ROHM Semiconductor
1: $1.73
4,000In Stock
New Product

Mfr. Part No.
BD9S109NUX-CE2

Mouser Part No
755-BD9S109NUX-CE2

New Product

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 1.0A Output, 2.2MHz Op Frequency, -40+125

Learn More

Datasheet

4,000In Stock

Cut Tape

$1.73

$1.26

$1.14

$1.01

View

Reel

$0.821

Min.: 1
Mult.: 1

: 4,000

SMD/SMT

VSON008X2020-7

Buck

800 mV to 5.5 V

1 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 2.0A Output, 2.2MHz Op Frequency, -40+125

BD9S209NUX-CE2
ROHM Semiconductor
1: $1.92
2,100In Stock
New Product

Mfr. Part No.
BD9S209NUX-CE2

Mouser Part No
755-BD9S209NUX-CE2

New Product

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 2.0A Output, 2.2MHz Op Frequency, -40+125

Learn More

Datasheet

2,100In Stock

Cut Tape

$1.92

$1.40

$1.27

$1.12

View

Reel

$0.923

Min.: 1
Mult.: 1

: 4,000

SMD/SMT

VSON008X2020-8

Buck

800 mV to 5.5 V

2 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 1.0A Output, 2.2MHz Op Frequency, -40+125

BD9S100NUX-CE2
ROHM Semiconductor
1: $2.48
2,598In Stock

Mfr. Part No.
BD9S100NUX-CE2

Mouser Part No
755-BD9S100NUX-CE2

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 0.8V -VIN, 1.0A Output, 2.2MHz Op Frequency, -40+125

Learn More

Datasheet

Product Comments

2,598In Stock

Cut Tape

$2.48

$1.82

$1.66

$1.48

View

Reel

$1.22

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

SMD/SMT

VSON-8

Buck

800 mV to 5.5 V

1 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators Sync Buck DC/DC Conv 3A MOSFET; 2.7-5.5V

BD9S300MUF-CE2
ROHM Semiconductor
1: $3.55
660In Stock
3,000Expected 24/11/2026

Mfr. Part No.
BD9S300MUF-CE2

Mouser Part No
755-BD9S300MUF-CE2

ROHM Semiconductor

Switching Voltage Regulators Sync Buck DC/DC Conv 3A MOSFET; 2.7-5.5V

Learn More

Datasheet

Product Comments

660In Stock

3,000Expected 24/11/2026

Cut Tape

$3.55

$2.65

$2.42

$2.18

Reel

$1.84

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

SMD/SMT

VQFNFV3030-EP-16

Buck

800 mV to 4.4 V

3 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape, MouseReel

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 1.2V(Typ), 1.0A Output, 2.2MHz Op Frequency, -40+125

BD9S110NUX-CE2
ROHM Semiconductor
4,000: $1.27
Non-Stocked Lead-Time 13 Weeks

Mfr. Part No.
BD9S110NUX-CE2

Mouser Part No
755-BD9S110NUX-CE2

ROHM Semiconductor

Switching Voltage Regulators IC, PMIC, Buck DC/DC Converter, 2.7V5.5V Input, 1.2V(Typ), 1.0A Output, 2.2MHz Op Frequency, -40+125

Learn More

Datasheet

Product Comments

Non-Stocked Lead-Time 13 Weeks

Reel

$1.27

Min.: 4,000
Mult.: 4,000

: 4,000

SMD/SMT

VSON-8

Buck

1.2 V

1 A

1 Output

2.2 MHz

- 40 C

+ 125 C

AEC-Q100

Reel

BD9S Series Automotive Buck DC-DC Converters

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