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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PLN) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Topology	Output Voltage	Output Current	Number of Outputs	Switching Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging
Switching Voltage Regulators Sync Buck DC/DC Conv 2A MOSFET; 2.7-5.5V BD9S200MUF-CE2 ROHM Semiconductor 1: 8,40 zł 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 Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	7 520In Stock	Cut Tape 8,40 zł 6,25 zł 5,68 zł 5,10 zł Reel 4,28 zł View 4,80 zł 4,66 zł 4,49 zł 4,20 zł 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 Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 0.6A, 2.2MHz BD9S000NUX-CE2 ROHM Semiconductor 1: 5,32 zł 3 082In Stock	Mfr. Part No. BD9S000NUX-CE2 Mouser Part No 755-BD9S000NUX-CE2	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 0.6A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	3 082In Stock	Cut Tape 5,32 zł 3,90 zł 3,52 zł 3,12 zł View Reel 2,57 zł 2,92 zł 2,81 zł 2,71 zł 2,64 zł 2,57 zł 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 Secondary switching regulator, 7V, 2.7 5.5V, 1.8V(Typ), 1.0A, 2.2MHz BD9S111NUX-CE2 ROHM Semiconductor 1: 6,91 zł 2 925In Stock	Mfr. Part No. BD9S111NUX-CE2 Mouser Part No 755-BD9S111NUX-CE2	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 1.8V(Typ), 1.0A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2 925In Stock	Cut Tape 6,91 zł 5,06 zł 4,62 zł 4,09 zł View Reel 3,40 zł 3,86 zł 3,73 zł 3,65 zł 3,48 zł 3,40 zł 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: 11,35 zł 2 430In 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2 430In Stock	Cut Tape 11,35 zł 8,54 zł 7,74 zł 6,95 zł Reel 5,94 zł View 6,60 zł 6,47 zł 6,25 zł 5,50 zł 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 Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 1.0A, 2.2MHz BD9S109NUX-CE2 ROHM Semiconductor 1: 4,80 zł 4 000In Stock New Product	Mfr. Part No. BD9S109NUX-CE2 Mouser Part No 755-BD9S109NUX-CE2 New Product	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 1.0A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	4 000In Stock	Cut Tape 4,80 zł 3,49 zł 3,16 zł 2,80 zł View Reel 2,28 zł 2,63 zł 2,52 zł 2,44 zł 2,40 zł 2,28 zł	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 Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 2.0A, 2.2MHz BD9S209NUX-CE2 ROHM Semiconductor 1: 5,32 zł 2 100In Stock New Product	Mfr. Part No. BD9S209NUX-CE2 Mouser Part No 755-BD9S209NUX-CE2 New Product	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 2.0A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2 100In Stock	Cut Tape 5,32 zł 3,90 zł 3,53 zł 3,12 zł View Reel 2,57 zł 2,93 zł 2,82 zł 2,71 zł 2,64 zł 2,57 zł	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 Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 1.0A, 2.2MHz BD9S100NUX-CE2 ROHM Semiconductor 1: 6,91 zł 2 598In Stock	Mfr. Part No. BD9S100NUX-CE2 Mouser Part No 755-BD9S100NUX-CE2	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 0.8V VIN, 1.0A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2 598In Stock	Cut Tape 6,91 zł 5,06 zł 4,62 zł 4,12 zł View Reel 3,47 zł 3,90 zł 3,72 zł 3,71 zł 3,59 zł 3,47 zł 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: 9,86 zł 610In Stock 3 000Expected 12/15/2026	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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	610In Stock 3 000Expected 12/15/2026	Cut Tape 9,86 zł 7,39 zł 6,73 zł 6,07 zł View Reel 5,24 zł 5,72 zł 5,54 zł 5,37 zł 5,24 zł 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 Secondary switching regulator, 7V, 2.7 5.5V, 1.2V(Typ), 1.0A, 2.2MHz BD9S110NUX-CE2 ROHM Semiconductor 4 000: 3,59 zł Non-Stocked Lead-Time 13 Weeks	Mfr. Part No. BD9S110NUX-CE2 Mouser Part No 755-BD9S110NUX-CE2	ROHM Semiconductor	Switching Voltage Regulators Secondary switching regulator, 7V, 2.7 5.5V, 1.2V(Typ), 1.0A, 2.2MHz Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	Non-Stocked Lead-Time 13 Weeks	Reel 3,59 zł	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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