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BD9x Integrated MOSFET DC-DC Buck Converters

ROHM Semiconductor BD9x Integrated MOSFET DC-DC Buck Converters are synchronous buck switching regulators with built-in power MOSFETs. These ICs provide currents in a range from 1A to 6A. ROHM BD9x DC-DC Buck Converters deliver fast transient response by employing a constant on-time control system. This allows high oscillating frequency at low inductance. The devices employ an original constant on-time control method that provides low consumption at light load. This feature makes these devices ideal for equipment that demands minimal standby power consumption.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator BD950N5FP-CE2 ROHM Semiconductor 1: £1.09 1,880In Stock New Product	Mfr. Part No. BD950N5FP-CE2 Mouser Part No 755-BD950N5FP-CE2 New Product	ROHM Semiconductor	LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator Learn More about ROHM Semiconductor rohm bd9xxn5 c 45v automotive nano cap ldos	Datasheet	1,880In Stock	Cut Tape £1.09 £0.796 £0.717 £0.636 Reel £0.537 View £0.598 £0.574 £0.56 £0.524	Min.: 1 Mult.: 1 : 2,000
LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator BD950N5WEFJ-CE2 ROHM Semiconductor 1: £0.952 2,055In Stock New Product	Mfr. Part No. BD950N5WEFJ-CE2 Mouser Part No 755-BD950N5WEFJ-CE2 New Product	ROHM Semiconductor	LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator Learn More about ROHM Semiconductor rohm bd9xxn5 c 45v automotive nano cap ldos	Datasheet	2,055In Stock	Cut Tape £0.952 £0.693 £0.628 £0.555 Reel £0.464 View £0.521 £0.50 £0.485 £0.453	Min.: 1 Mult.: 1 : 2,500
LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator BD950N5WFP-CE2 ROHM Semiconductor 1: £1.09 1,982In Stock New Product	Mfr. Part No. BD950N5WFP-CE2 Mouser Part No 755-BD950N5WFP-CE2 New Product	ROHM Semiconductor	LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 5.0V, Fixed Output LDO Regulator Learn More about ROHM Semiconductor rohm bd9xxn5 c 45v automotive nano cap ldos	Datasheet	1,982In Stock	Cut Tape £1.09 £0.796 £0.717 £0.636 Reel £0.537 View £0.598 £0.574 £0.56 £0.524	Min.: 1 Mult.: 1 : 2,000
Switching Voltage Regulators 1ch Buck Converter Integrated FET BD9G401EFJ-E2 ROHM Semiconductor 1: £1.16 1,464In Stock New Product	Mfr. Part No. BD9G401EFJ-E2 Mouser Part No 755-BD9G401EFJ-E2 New Product	ROHM Semiconductor	Switching Voltage Regulators 1ch Buck Converter Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	1,464In Stock	Cut Tape £1.16 £0.856 £0.773 £0.684 Reel £0.573 View £0.643 £0.619 £0.613 £0.563	Min.: 1 Mult.: 1 : 2,500
LDO Voltage Regulators QuiCur, Automotive 500mA 3.3V, Fixed Output LDO Regulators With Enable Input BD933M5WEFJ-CE2 ROHM Semiconductor 1: £0.934 4,951In Stock	Mfr. Part No. BD933M5WEFJ-CE2 Mouser Part No 755-BD933M5WEFJ-CE2	ROHM Semiconductor	LDO Voltage Regulators QuiCur, Automotive 500mA 3.3V, Fixed Output LDO Regulators With Enable Input Learn More about ROHM Semiconductor rohm quicur regulators	Datasheet	4,951In Stock	Cut Tape £0.934 £0.672 £0.608 £0.549 Reel £0.458 View £0.514 £0.494 £0.485 £0.438	Min.: 1 Mult.: 1 : 2,500
LDO Voltage Regulators QuiCur, Automotive 500mA 5.0V, Fixed Output LDO Regulators BD950M5EFJ-CE2 ROHM Semiconductor 1: £0.934 2,514In Stock	Mfr. Part No. BD950M5EFJ-CE2 Mouser Part No 755-BD950M5EFJ-CE2	ROHM Semiconductor	LDO Voltage Regulators QuiCur, Automotive 500mA 5.0V, Fixed Output LDO Regulators Learn More about ROHM Semiconductor rohm quicur regulators	Datasheet	2,514In Stock	Cut Tape £0.934 £0.672 £0.608 £0.539 Reel £0.458 View £0.505 £0.485 £0.469 £0.438	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 2.7 V to 5.5 V Input, 2 A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9A201FP4-LBZTL ROHM Semiconductor 1: £1.20 3,378In Stock	Mfr. Part No. BD9A201FP4-LBZTL Mouser Part No 755-BD9A201FP4-LBZTL	ROHM Semiconductor	Switching Voltage Regulators 2.7 V to 5.5 V Input, 2 A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	3,378In Stock	Cut Tape £1.20 £0.871 £0.796 £0.703 Reel £0.59 View £0.661 £0.636 £0.63 £0.588	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators 4.5V to 28V Input, 1.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: BD9E105FP4-Z is a single synchronous buck DC/DC converter with built-in low on-resistance power MOSFETs. The Light Load Mode control provides excellent efficiency char BD9E105FP4-ZTL ROHM Semiconductor 1: £1.14 8,663In Stock	Mfr. Part No. BD9E105FP4-ZTL Mouser Part No 755-BD9E105FP4-ZTL	ROHM Semiconductor	Switching Voltage Regulators 4.5V to 28V Input, 1.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: BD9E105FP4-Z is a single synchronous buck DC/DC converter with built-in low on-resistance power MOSFETs. The Light Load Mode control provides excellent efficiency char Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	8,663In Stock	Cut Tape £1.14 £0.834 £0.759 £0.669 Reel £0.567 View £0.629 £0.604 £0.598 £0.558	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators 4.5V to 26V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: BD9E200FP4-Z is a single synchronous buck DC/DC converter with built-in low on-resistance power MOSFETs. The Light Load Mode control provides excellent efficiency char BD9E200FP4-ZTL ROHM Semiconductor 1: £1.14 6,810In Stock	Mfr. Part No. BD9E200FP4-ZTL Mouser Part No 755-BD9E200FP4-ZTL	ROHM Semiconductor	Switching Voltage Regulators 4.5V to 26V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: BD9E200FP4-Z is a single synchronous buck DC/DC converter with built-in low on-resistance power MOSFETs. The Light Load Mode control provides excellent efficiency char Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	6,810In Stock	Cut Tape £1.14 £0.834 £0.759 £0.669 Reel £0.556 View £0.629 £0.604 £0.598 £0.546	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators 4.5V to 28V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E202FP4-ZTL ROHM Semiconductor 1: £0.684 3,516In Stock	Mfr. Part No. BD9E202FP4-ZTL Mouser Part No 755-BD9E202FP4-ZTL	ROHM Semiconductor	Switching Voltage Regulators 4.5V to 28V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	3,516In Stock	Cut Tape £0.684 £0.488 £0.44 £0.387 Reel £0.324 View £0.361 £0.346 £0.335 £0.314	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators 4.5V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: This is the product guarantees long time support in Industrial market. BD9E304FP4-LBZ is a single synchronous buck DC/DC converter with built-in low on-resistance powe BD9E304FP4-LBZTL ROHM Semiconductor 1: £1.42 6,378In Stock	Mfr. Part No. BD9E304FP4-LBZTL Mouser Part No 755-BD9E304FP4-LBZTL	ROHM Semiconductor	Switching Voltage Regulators 4.5V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter: This is the product guarantees long time support in Industrial market. BD9E304FP4-LBZ is a single synchronous buck DC/DC converter with built-in low on-resistance powe Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	6,378In Stock	Cut Tape £1.42 £1.05 £0.952 £0.849 Reel £0.724 View £0.803 £0.773 £0.71	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators Nano Pulse Control 3.5V to 40V Input, 2A Single 2.2MHz Buck DC/DC Converter For Automotive: BD9P208MUF-C is current mode synchronous buck DC/DC converter integrating POWER MOSFETs. BD9P208MUF-CE2 ROHM Semiconductor 1: £1.58 4,433In Stock	Mfr. Part No. BD9P208MUF-CE2 Mouser Part No 755-BD9P208MUF-CE2	ROHM Semiconductor	Switching Voltage Regulators Nano Pulse Control 3.5V to 40V Input, 2A Single 2.2MHz Buck DC/DC Converter For Automotive: BD9P208MUF-C is current mode synchronous buck DC/DC converter integrating POWER MOSFETs. Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	4,433In Stock	Cut Tape £1.58 £1.17 £1.07 £0.952 Reel £0.826 View £0.899 £0.871 £0.849 £0.811	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators DC/DC Converter 7V to 36V input BD9E303EFJ-LBE2 ROHM Semiconductor 1: £2.55 14,358In Stock	Mfr. Part No. BD9E303EFJ-LBE2 Mouser Part No 755-BD9E303EFJ-LBE2	ROHM Semiconductor	Switching Voltage Regulators DC/DC Converter 7V to 36V input Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	14,358In Stock	Cut Tape £2.55 £1.91 £1.75 £1.58 View Reel £1.38 £1.50 £1.48 £1.43 £1.38 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 1ch Buck Converter Integrated FET BD9G341AEFJ-E2 ROHM Semiconductor 1: £3.21 8,605In Stock	Mfr. Part No. BD9G341AEFJ-E2 Mouser Part No 755-BD9G341AEFJ-E2	ROHM Semiconductor	Switching Voltage Regulators 1ch Buck Converter Integrated FET Learn More about ROHM Semiconductor rohm bd9g341aefj converter	Datasheet	8,605In Stock	Cut Tape £3.21 £2.43 £2.23 £2.01 View Reel £1.77 £1.90 £1.89 £1.85 £1.77 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Power Management IC Development Tools Evaluation board for BD9E302EFJ BD9E302EFJ-EVK-001 ROHM Semiconductor 1: £26.62 5In Stock	Mfr. Part No. BD9E302EFJ-EVK-001 Mouser Part No 755-BD9E302EFJEVK001	ROHM Semiconductor	Power Management IC Development Tools Evaluation board for BD9E302EFJ Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	5In Stock	£26.62	Min.: 1 Mult.: 1
Power Management IC Development Tools Evaluation board for BD9G401EFJ BD9G401EFJ-EVK-001 ROHM Semiconductor 1: £28.77 11In Stock	Mfr. Part No. BD9G401EFJ-EVK-001 Mouser Part No 755-BD9G401EFJEVK001	ROHM Semiconductor	Power Management IC Development Tools Evaluation board for BD9G401EFJ Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	11In Stock	£28.77	Min.: 1 Mult.: 1
LDO Voltage Regulators QuiCur, Automotive 500mA, Adjustable Output LDO Regulators With Enable Input BD900M5WEFJ-CE2 ROHM Semiconductor 1: £0.934 449In Stock 2,500Expected 12/10/2026	Mfr. Part No. BD900M5WEFJ-CE2 Mouser Part No 755-BD900M5WEFJ-CE2	ROHM Semiconductor	LDO Voltage Regulators QuiCur, Automotive 500mA, Adjustable Output LDO Regulators With Enable Input Learn More about ROHM Semiconductor rohm quicur regulators	Datasheet	449In Stock 2,500Expected 12/10/2026	Cut Tape £0.934 £0.672 £0.608 £0.549 Reel £0.449 View £0.514 £0.494 £0.485 £0.438	Min.: 1 Mult.: 1 : 2,500
LDO Voltage Regulators QuiCur, Automotive 500mA 5.0V, Fixed Output LDO Regulators With Enable Input BD950M5WEFJ-CE2 ROHM Semiconductor 1: £0.952 2,075In Stock	Mfr. Part No. BD950M5WEFJ-CE2 Mouser Part No 755-BD950M5WEFJ-CE2	ROHM Semiconductor	LDO Voltage Regulators QuiCur, Automotive 500mA 5.0V, Fixed Output LDO Regulators With Enable Input Learn More about ROHM Semiconductor rohm quicur regulators	Datasheet	2,075In Stock	Cut Tape £0.952 £0.685 £0.621 £0.549 Reel £0.449 View £0.514 £0.494 £0.485 £0.438 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 4.5V to 28V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E203FP4-ZTL ROHM Semiconductor 1: £0.684 1,525In Stock	Mfr. Part No. BD9E203FP4-ZTL Mouser Part No 755-BD9E203FP4-ZTL	ROHM Semiconductor	Switching Voltage Regulators 4.5V to 28V Input, 2.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	1,525In Stock	Cut Tape £0.684 £0.488 £0.44 £0.387 Reel £0.316 View £0.361 £0.346 £0.335 £0.314	Min.: 1 Mult.: 1 : 3,500
Switching Voltage Regulators 7.0V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E303UEFJ-LBH2 ROHM Semiconductor 1: £4.02 157In Stock	Mfr. Part No. BD9E303UEFJ-LBH2 Mouser Part No 755-BD9E303UEFJ-LBH2	ROHM Semiconductor	Switching Voltage Regulators 7.0V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	157In Stock	Cut Tape £4.02 £3.06 £2.83 £2.58 Reel £2.58 View £2.40 £2.38 £2.37	Min.: 1 Mult.: 1 : 250
Switching Voltage Regulators BUCK SWITCHING REG IC BD9G201UEFJ-ME2 ROHM Semiconductor 1: £1.75 498In Stock	Mfr. Part No. BD9G201UEFJ-ME2 Mouser Part No 755-BD9G201UEFJ-ME2	ROHM Semiconductor	Switching Voltage Regulators BUCK SWITCHING REG IC Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	498In Stock	Cut Tape £1.75 £1.29 £1.18 £1.06 Reel £0.89 View £0.995 £0.969 £0.934 £0.882	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators IC Pwr Swtch Reg Multi Output BD93291EFJ-E2 ROHM Semiconductor 1: £0.856 4,179In Stock	Mfr. Part No. BD93291EFJ-E2 Mouser Part No 755-BD93291EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Multi Output Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	4,179In Stock	Cut Tape £0.856 £0.629 £0.567 £0.501 Reel £0.417 View £0.47 £0.45 £0.44 £0.394 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD95861MUV-E2 ROHM Semiconductor 1: £1.27 8,109In Stock	Mfr. Part No. BD95861MUV-E2 Mouser Part No 755-BD95861MUV-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	8,109In Stock	Cut Tape £1.27 £0.934 £0.849 £0.759 View Reel £0.664 £0.706 £0.68 £0.676 £0.664 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 900 kHz SINGLE CHAN STEP DOWN SWITCHING BD9870FPS-E2 ROHM Semiconductor 1: £1.42 2,957In Stock	Mfr. Part No. BD9870FPS-E2 Mouser Part No 755-BD9870FPS-E2	ROHM Semiconductor	Switching Voltage Regulators 900 kHz SINGLE CHAN STEP DOWN SWITCHING Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	2,957In Stock	Cut Tape £1.42 £1.05 £0.96 £0.856 Reel £0.743 View £0.803 £0.773 £0.708 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Switching Voltage Regulators RECT 650V 15A SM SCHOTTKY BD9C601EFJ-E2 ROHM Semiconductor 1: £1.75 1,200In Stock	Mfr. Part No. BD9C601EFJ-E2 Mouser Part No 755-BD9C601EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators RECT 650V 15A SM SCHOTTKY Learn More about ROHM Semiconductor rohm bd9c601efjevk 101 board	Datasheet	1,200In Stock	Cut Tape £1.75 £1.29 £1.18 £1.06 Reel £0.89 View £0.995 £0.969 £0.943 £0.882 MouseReel Available	Min.: 1 Mult.: 1 : 2,500