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 (EUR) 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: 1,91 € 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 1,91 € 1,42 € 1,29 € 1,16 € Reel 0,972 € View 1,09 € 1,06 € 1,02 € 0,955 € 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: 1,20 € 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 Learn More about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	3.082In Stock	Cut Tape 1,20 € 0,886 € 0,80 € 0,708 € View Reel 0,584 € 0,664 € 0,638 € 0,617 € 0,599 € 0,584 € 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: 1,56 € 2.925In 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2.925In Stock	Cut Tape 1,56 € 1,15 € 1,04 € 0,929 € View Reel 0,783 € 0,877 € 0,848 € 0,83 € 0,806 € 0,783 € 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: 2,55 € 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2.560In Stock	Cut Tape 2,55 € 1,94 € 1,74 € 1,57 € Reel 1,35 € View 1,49 € 1,44 € 1,38 € 1,25 € 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: 1,09 € 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	4.000In Stock	Cut Tape 1,09 € 0,794 € 0,719 € 0,636 € View Reel 0,519 € 0,597 € 0,573 € 0,555 € 0,546 € 0,519 €	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: 1,21 € 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2.100In Stock	Cut Tape 1,21 € 0,886 € 0,802 € 0,71 € View Reel 0,584 € 0,667 € 0,641 € 0,617 € 0,599 € 0,584 €	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: 1,57 € 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	2.598In Stock	Cut Tape 1,57 € 1,15 € 1,05 € 0,937 € View Reel 0,773 € 0,886 € 0,846 € 0,844 € 0,815 € 0,773 € 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: 2,24 € 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 2,24 € 1,68 € 1,53 € 1,38 € View Reel 1,19 € 1,30 € 1,26 € 1,22 € 1,19 € 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: 0,802 € 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 about ROHM Semiconductor rohm bd9s automotive dcdc converters	Datasheet	Non-Stocked Lead-Time 13 Weeks	Reel 0,802 €	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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