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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 (EUR) Filter the results in the table by unit price based on your quantity.	Qty.
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9D320EFJ-E2 ROHM Semiconductor 1: €0.662 6,935In Stock 42,500On Order	Mfr. Part No. BD9D320EFJ-E2 Mouser Part No 755-BD9D320EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	6,935In Stock 42,500On Order On Order Ship Dates Mfr. No: BD9D320EFJ-E2 Stock: 6,935 Can Dispatch Immediately On Order: 15,000 Expected 19/11/2026 27,500 Expected 26/11/2026 Factory Lead Time: 14 Weeks	Cut Tape €0.662 €0.465 €0.417 €0.365 Reel €0.298 View €0.339 €0.324 €0.311 €0.29 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9D321EFJ-E2 ROHM Semiconductor 1: €0.593 7,048In Stock	Mfr. Part No. BD9D321EFJ-E2 Mouser Part No 755-BD9D321EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	7,048In Stock	Cut Tape €0.593 €0.419 €0.377 €0.329 View Reel €0.269 €0.306 €0.293 €0.281 €0.269 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 7-36Vin,1A MOSFET DC/DC Converter BD9E100FJ-LBGE2 ROHM Semiconductor 1: €3.39 2,997In Stock	Mfr. Part No. BD9E100FJ-LBGE2 Mouser Part No 755-BD9E100FJ-LBGE2	ROHM Semiconductor	Switching Voltage Regulators 7-36Vin,1A MOSFET DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	2,997In Stock	Cut Tape €3.39 €2.55 €2.35 €2.12 View Reel €1.87 €2.00 €1.87 €1.87 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators SD Switching Reg BD9G101G-TR ROHM Semiconductor 1: €1.35 4,396In Stock 12,000Expected 11/02/2027	Mfr. Part No. BD9G101G-TR Mouser Part No 755-BD9G101G-TR	ROHM Semiconductor	Switching Voltage Regulators SD Switching Reg Learn More about ROHM Semiconductor rohm bd9g101g regulators	Datasheet	4,396In Stock 12,000Expected 11/02/2027	Cut Tape €1.35 €0.989 €0.894 €0.794 Reel €0.664 View €0.746 €0.717 €0.711 €0.65 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators Buck Conv Intgtd FET 0.5A 1ch; 6V-24V BD9G102G-LBTR ROHM Semiconductor 1: €1.35 13,370In Stock	Mfr. Part No. BD9G102G-LBTR Mouser Part No 755-BD9G102G-LBTR	ROHM Semiconductor	Switching Voltage Regulators Buck Conv Intgtd FET 0.5A 1ch; 6V-24V Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	13,370In Stock	Cut Tape €1.35 €0.998 €0.903 €0.798 Reel €0.667 View €0.75 €0.722 €0.715 €0.653 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators Power Supply IC T/R BD9161FVM-LBTR ROHM Semiconductor 1: €1.75 2,994In Stock NRND	Mfr. Part No. BD9161FVM-LBTR Mouser Part No 755-BD9161FVM-LBTR NRND	ROHM Semiconductor	Switching Voltage Regulators Power Supply IC T/R Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	2,994In Stock	Cut Tape €1.75 €1.72 €1.57 €1.48 Reel View €1.43 €1.37 €0.894 €0.86 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators 4.2-18V 100-800kHz 1 Chan Step-Up BD9306AFVM-TR ROHM Semiconductor 1: €1.40 691In Stock	Mfr. Part No. BD9306AFVM-TR Mouser Part No 755-BD9306AFVM-TR	ROHM Semiconductor	Switching Voltage Regulators 4.2-18V 100-800kHz 1 Chan Step-Up Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	691In Stock	Cut Tape €1.40 €1.03 €0.937 €0.827 Reel €0.712 View €0.778 €0.748 €0.742 €0.697 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9326EFJ-E2 ROHM Semiconductor 1: €1.69 711In Stock 2,500Expected 06/01/2027	Mfr. Part No. BD9326EFJ-E2 Mouser Part No 755-BD9326EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	711In Stock 2,500Expected 06/01/2027	Cut Tape €1.69 €1.24 €1.13 €0.998 Reel €0.84 View €0.937 €0.903 €0.837 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 7.0V to 36V Input, 2.5A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E300UEFJ-LBH2 ROHM Semiconductor 1: €4.35 250In Stock	Mfr. Part No. BD9E300UEFJ-LBH2 Mouser Part No 755-BD9E300UEFJ-LBH2	ROHM Semiconductor	Switching Voltage Regulators 7.0V to 36V Input, 2.5A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	250In Stock	Cut Tape €4.35 €3.31 €3.05 €2.77 Reel €2.62 View €2.53 €2.47 €2.44	Min.: 1 Mult.: 1 : 250
Switching Voltage Regulators 7.0V to 36V Input, 2.5A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E301UEFJ-LBH2 ROHM Semiconductor 1: €4.35 250In Stock	Mfr. Part No. BD9E301UEFJ-LBH2 Mouser Part No 755-BD9E301UEFJ-LBH2	ROHM Semiconductor	Switching Voltage Regulators 7.0V to 36V Input, 2.5A Integrated MOSFET Single Synchronous Buck DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	250In Stock	Cut Tape €4.35 €3.31 €3.05 €2.77 Reel €2.62 View €2.53 €2.47 €2.44	Min.: 1 Mult.: 1 : 250
Switching Controllers 60V Synchronous Step-down Regulator BD9611MUV-E2 ROHM Semiconductor 1: €2.00 1,112In Stock 2,500Expected 26/01/2027	Mfr. Part No. BD9611MUV-E2 Mouser Part No 755-BD9611MUV-E2	ROHM Semiconductor	Switching Controllers 60V Synchronous Step-down Regulator Learn More about ROHM Semiconductor rohm semi BD9611MUV E2 stepdown switch regulators	Datasheet	1,112In Stock 2,500Expected 26/01/2027	Cut Tape €2.00 €1.48 €1.35 €1.21 Reel €1.02 View €1.14 €1.11 €1.08 €0.972 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9873CP-V5E2 ROHM Semiconductor 1: €2.93 260In Stock 500Expected 09/10/2026	Mfr. Part No. BD9873CP-V5E2 Mouser Part No 755-BD9873CP-V5E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	260In Stock 500Expected 09/10/2026	Cut Tape €2.93 €2.16 €1.96 €1.75 Reel €1.61 View €1.65 €1.57 €1.47 €1.44	Min.: 1 Mult.: 1 : 500
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9874CP-V5E2 ROHM Semiconductor 1: €1.74 387In Stock	Mfr. Part No. BD9874CP-V5E2 Mouser Part No 755-BD9874CP-V5E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	387In Stock	Cut Tape €1.74 €1.28 €1.17 €1.04 €1.02 Reel €1.02	Min.: 1 Mult.: 1 : 500
Switching Voltage Regulators 2.7V-5.5V 6A MOSFET Sngl Sync Buck Conv BD9A600MUV-E2 ROHM Semiconductor 1: €1.08 480In Stock 21,000On Order	Mfr. Part No. BD9A600MUV-E2 Mouser Part No 755-BD9A600MUV-E2	ROHM Semiconductor	Switching Voltage Regulators 2.7V-5.5V 6A MOSFET Sngl Sync Buck Conv Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	480In Stock 21,000On Order On Order Ship Dates Mfr. No: BD9A600MUV-E2 Stock: 480 Can Dispatch Immediately On Order: 3,000 Expected 16/10/2026 3,000 Expected 19/10/2026 15,000 Expected 26/10/2026 Factory Lead Time: 14 Weeks	Cut Tape €1.08 €0.785 €0.71 €0.628 Reel €0.524 View €0.588 €0.565 €0.539 €0.516 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators 2.7V To 5.5 MOSFET DC/DC Conv BD9B301MUV-LBE2 ROHM Semiconductor 1: €2.98 379In Stock	Mfr. Part No. BD9B301MUV-LBE2 Mouser Part No 755-BD9B301MUV-LBE2	ROHM Semiconductor	Switching Voltage Regulators 2.7V To 5.5 MOSFET DC/DC Conv Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	379In Stock	Cut Tape €2.98 €2.24 €2.05 €1.84 Reel €1.51 View €1.74 €1.70 €1.62 €1.50 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators 2.7-5.5v DC/DC Conv w/ 5A MOSFET BD9B500MUV-E2 ROHM Semiconductor 1: €1.09 577In Stock	Mfr. Part No. BD9B500MUV-E2 Mouser Part No 755-BD9B500MUV-E2	ROHM Semiconductor	Switching Voltage Regulators 2.7-5.5v DC/DC Conv w/ 5A MOSFET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	577In Stock	Cut Tape €1.09 €0.796 €0.72 €0.636 Reel €0.531 View €0.596 €0.572 €0.546 €0.524 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET BD9E100FJ-LBGH2 ROHM Semiconductor 1: €3.04 100In Stock 250Expected 17/11/2026	Mfr. Part No. BD9E100FJ-LBGH2 Mouser Part No 755-BD9E100FJ-LBGH2	ROHM Semiconductor	Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	100In Stock 250Expected 17/11/2026	Cut Tape €3.04 €2.30 €2.11 €1.90 Reel €1.79 View €1.70 €1.65 €1.63 MouseReel Available	Min.: 1 Mult.: 1 : 250
Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET BD9E101FJ-LBGH2 ROHM Semiconductor 1: €3.04 39In Stock	Mfr. Part No. BD9E101FJ-LBGH2 Mouser Part No 755-BD9E101FJ-LBGH2	ROHM Semiconductor	Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	39In Stock	Cut Tape €3.04 €2.30 €2.11 €1.90 Reel €1.78 View €1.76 €1.71 €1.69 €1.67 MouseReel Available	Min.: 1 Mult.: 1 : 250
Switching Voltage Regulators 7-36Vin,2.5A MOSFET DC/DC Converter BD9E301EFJ-LBE2 ROHM Semiconductor 1: €3.89 307In Stock	Mfr. Part No. BD9E301EFJ-LBE2 Mouser Part No 755-BD9E301EFJ-LBE2	ROHM Semiconductor	Switching Voltage Regulators 7-36Vin,2.5A MOSFET DC/DC Converter Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	307In Stock	Cut Tape €3.89 €2.95 €2.72 €2.46 View Reel €2.18 €2.33 €2.25 €2.18 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 7-28V 3A Int MOSFET Buck DC/DC Conv IC BD9E302EFJ-E2 ROHM Semiconductor 1: €0.998 1,338In Stock 17,500On Order	Mfr. Part No. BD9E302EFJ-E2 Mouser Part No 755-BD9E302EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators 7-28V 3A Int MOSFET Buck DC/DC Conv IC Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	1,338In Stock 17,500On Order On Order Ship Dates Mfr. No: BD9E302EFJ-E2 Stock: 1,338 Can Dispatch Immediately On Order: 10,000 Expected 12/10/2026 7,500 Expected 19/11/2026 Factory Lead Time: 14 Weeks	Cut Tape €0.998 €0.714 €0.642 €0.565 Reel €0.453 View €0.528 €0.506 €0.49 €0.452 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators High Eff. Stepdown Sw Reg 2A 4.5-13.2V BD9141MUV-E2 ROHM Semiconductor 1: €3.44 52In Stock	Mfr. Part No. BD9141MUV-E2 Mouser Part No 755-BD9141MUV-E2	ROHM Semiconductor	Switching Voltage Regulators High Eff. Stepdown Sw Reg 2A 4.5-13.2V Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	52In Stock	Cut Tape €3.44 €2.57 €2.35 €2.11 Reel €1.82 View €2.00 €1.94 €1.85 €1.81 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET BD9859EFJ-E2 ROHM Semiconductor 1: €1.11 1,005In Stock	Mfr. Part No. BD9859EFJ-E2 Mouser Part No 755-BD9859EFJ-E2	ROHM Semiconductor	Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	1,005In Stock	Cut Tape €1.11 €0.80 €0.724 €0.64 Reel €0.534 View €0.599 €0.575 €0.55 €0.521 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 7.0V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E303UEFJ-LBE2 ROHM Semiconductor 1: €2.09 228In Stock NRND	Mfr. Part No. BD9E303UEFJ-LBE2 Mouser Part No 755-BD9E303UEFJ-LBE2 NRND	ROHM Semiconductor	Switching Voltage Regulators 7.0V to 36V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter	Datasheet	228In Stock	Cut Tape €2.09 €1.55 €1.42 €1.27 Reel €1.08 View €1.20 €1.17 €1.14 €1.04	Min.: 1 Mult.: 1 : 2,500
Switching Voltage Regulators 3.3V Output Voltage BD9109FVM-TR ROHM Semiconductor 1: €1.89 356In Stock NRND	Mfr. Part No. BD9109FVM-TR Mouser Part No 755-BD9109FVM-TR NRND	ROHM Semiconductor	Switching Voltage Regulators 3.3V Output Voltage Learn More about ROHM Semiconductor rohm bd91xx integrated fet	Datasheet	356In Stock	Cut Tape €1.89 €1.43 €1.31 €1.17 Reel View €1.10 €1.07 €1.03 €0.955 €0.946 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Switching Voltage Regulators 1ch Buck Cnvrtr 4.5-42V; HTSOP-J8ES BD9G201EFJ-LBE2 ROHM Semiconductor 1: €2.12 392In Stock NRND	Mfr. Part No. BD9G201EFJ-LBE2 Mouser Part No 755-BD9G201EFJ-LBE2 NRND	ROHM Semiconductor	Switching Voltage Regulators 1ch Buck Cnvrtr 4.5-42V; HTSOP-J8ES Learn More about ROHM Semiconductor rohm bd9 buck converter	Datasheet	392In Stock	Cut Tape €2.12 €1.58 €1.44 €1.29 Reel View €1.22 €1.19 €1.16 €1.09 €1.08 MouseReel Available	Min.: 1 Mult.: 1 : 2,500