Import Bd9850fvm-Tr — Buy in wholesale FOB from Supplier in China

The BD9850FVM-TR is a single-channel DC/DC step-down switching regulator controller manufactured by ROHM Semiconductor and supplied by Key Components Co., Limited from Shenzhen, Guangdong Province, China. This synchronous buck controller supports a maximum switching frequency of 2 MHz, enabling compact external component selection and reduced solution footprint in space-constrained designs. The device is packaged in a surface-mount VFM package and is targeted at applications where board area and height are critical constraints, including portable equipment, industrial controllers, and telecommunications infrastructure.

The controller architecture employs voltage-mode control with external MOSFET driver capability, allowing designers to select optimal external FETs based on current rating, RDS(on), and thermal requirements for their specific load profile. The 2 MHz maximum switching frequency permits the use of smaller inductors and lower-value output capacitors compared to lower-frequency alternatives, though this demands careful attention to switching loss, gate charge characteristics, and EMI filtering. The BD9850FVM is distinguished from its sibling BD9851EFV by channel count, with the latter offering dual independent buck channels at up to 3 MHz.

Typical applications include point-of-load regulation in distributed power systems, FPGA and processor core supplies, and battery-powered equipment where converter efficiency at light load and physical size are prioritised. Buyers should confirm with Key Components Co., Limited whether the -TR suffix denotes tape-and-reel packaging, the specific date code and lot traceability available, and whether the parts are sourced from authorised ROHM distribution or grey-market channels. Thermal characterisation data, evaluation board availability, and reference design files should be requested for prototype validation.

Key Components Co., Limited maintains offices at 13/F Haribest Industrial Building, 45-47 Au Pui Wan Street, Sha Tin, New Territories, Hong Kong, with operational presence in Shenzhen, Guangdong Province, postal code 518028. The company operates as an electronic components distributor with a 'harbor' trust tier, though the listing shows a 0.00% response rate and zero average response hours, indicating no response tracking data rather than confirmed engagement metrics. The supplier's specialisation appears to be in semiconductor distribution rather than original manufacturing.

The listing provides no information about authorisation status with ROHM Semiconductor, inventory holding levels, counterfeit avoidance procedures, or quality certification such as ISO 9001 or ANSI/ESD S20.20 compliance. Years in business, annual revenue, customer base, and technical support capabilities are not stated. Buyers should verify whether Key Components is an authorised ROHM distributor, request documentation of supply chain provenance, and confirm anti-static handling and storage conditions at their Shenzhen facility before committing to volume orders.