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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Description Datasheet Availability Pricing (GBP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS Mounting Style
Package/Case
Output Voltage
ROHM Semiconductor Switching Voltage Regulators PwrCntrl IC 5.5-28V Dual DC/DC Cntlr
Datasheet
2,498In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT VQFNV5050-EP-32 1 V to 5.5 V
ROHM Semiconductor Switching Voltage Regulators IC Pwr Swtch Reg Multi Output
Datasheet
325In Stock
5,000Expected 19/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 5 V, 800 mV to 4 V
ROHM Semiconductor Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET
Datasheet
420In Stock
Min.: 1
Mult.: 1
Reel: 500

Through Hole TO-220-5 1 V to 28 V
ROHM Semiconductor Switching Voltage Regulators 2.7V-5.5V 6A MOSFET Sngl Sync Buck Conv
Datasheet
1,285In Stock
12,000Expected 16/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SMD/SMT VQFNV3030-EP-16 800 mV to 3.85 V
ROHM Semiconductor Switching Voltage Regulators 2.7V to 5.5V Input, 3.0A Integrated MOSFET Buck DC/DC Converter
Datasheet
1,063In Stock
3,000Expected 06/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SMD/SMT VQFNV3030-EP-16 800 mV to 4.4 V
ROHM Semiconductor Switching Voltage Regulators 4.5-18Vin,3A MOSFET DC/DC Converter
Datasheet
1,286In Stock
2,500Expected 22/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT SOP-J-8 800 mV to 12.6 V
ROHM Semiconductor Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET
Datasheet
320In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

SMD/SMT SOP-J-8 1 V to 25.2 V
ROHM Semiconductor Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET
Datasheet
139In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

SMD/SMT SOP-J-8 1 V to 25.2 V
ROHM Semiconductor Switching Voltage Regulators 7-26V; 1A MOSFET S. Sync Buck DC/DC
Datasheet
2,416In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT SOP-J-8 1 V to 13 V
ROHM Semiconductor Switching Voltage Regulators 7-36Vin,2.5A MOSFET DC/DC Converter
Datasheet
429In Stock
2,500Expected 02/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 1 V to 25.2 V
ROHM Semiconductor Switching Voltage Regulators Buck Conv Intgtd FET 0.5A 1ch; 6V-24V
Datasheet
Product Comments
27In Stock
24,000Expected 03/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SMD/SMT SSOP-6 750 mV to 33.6 V
ROHM Semiconductor Switching Voltage Regulators 1ch Buck Converter Integrated FET
Datasheet
74In Stock
5,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 1 V to 76 V
ROHM Semiconductor Switching Voltage Regulators High Eff. Stepdown Sw Reg 2A 4.5-13.2V
Datasheet
52In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT VQFNV4040-EP-20 2.5 V to 6 V
ROHM Semiconductor Switching Voltage Regulators 1ch Buck Cnvrtr 4.5-42V; HTSOP-J8ES
Datasheet
1,272In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 800 mV to 42 V
ROHM Semiconductor Switching Voltage Regulators 4.5-5.5V 0.8A 1Ch Buck Converter
Datasheet
1,000In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SMD/SMT MSOP-8 3.3 V
ROHM Semiconductor Switching Voltage Regulators Ind Buck Sync 7-36V w/ Integrated FET
Datasheet
273In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

SMD/SMT HTSOP-J8 1 V to 28.8 V
ROHM Semiconductor Switching Voltage Regulators IC Pwr Swtch Reg Integrated FET
Datasheet
2,495Expected 13/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 18 V
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA, Adjustable Output LDO Regulators
Datasheet
2,000Expected 17/03/2026
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA, Adjustable Output LDO Regulators With Output shutdown Function
Datasheet
2,000On Order
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5
ROHM Semiconductor LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA, Adjustable Output LDO Regulator
Datasheet
2,500Expected 05/03/2026
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA 3.3V, Fixed Output LDO Regulators
Datasheet
2,000Expected 26/02/2026
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5 3.3 V
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA 3.3V, Fixed Output LDO Regulators With Output shutdown Function
Datasheet
2,000On Order
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5 3.3 V
ROHM Semiconductor LDO Voltage Regulators Nano Cap™, QuiCur™, 500mA 3.3V, Fixed Output LDO Regulator
Datasheet
2,500On Order
Min.: 1
Mult.: 1
Reel: 2,500

SMD/SMT HTSOP-J8 3.3 V
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA 5.0V, Fixed Output LDO Regulators
Datasheet
2,000Expected 16/03/2026
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5 5 V
ROHM Semiconductor LDO Voltage Regulators QuiCur™, Automotive 500mA 5.0V, Fixed Output LDO Regulators With Output shutdown Function
Datasheet
2,000Expected 17/03/2026
Min.: 1
Mult.: 1
Reel: 2,000

SMD/SMT HRP-5 5 V