BD9G201EFJ-ME2

Overview

The BD9G201EFJ-ME2 is a single-channel synchronous buck switching regulator IC manufactured by ROHM Semiconductor. It features an integrated high-side FET and operates within an input voltage range of 4.5 V to 42 V, delivering a maximum output current of 1.5 A. The adjustable output voltage spans from 800 mV to 42 V. Key electrical parameters include a typical static current of 10 uA and a fixed internal switching frequency of 300 kHz. The device supports a shutdown function and is rated for operation across an extended temperature range of -40°C to +105°C.

Feature Summary

• Integrates a high-side power MOSFET with a controller in a compact package to minimize external component count.
• Employs current mode control architecture to achieve fast transient response and simplified phase compensation design.
• Supports synchronization with an external clock signal to facilitate system-level noise management.

Applications

• Secondary side power supplies in automotive systems
• Step-down conversion for 12V or 24V vehicle power rails
• General purpose DC-DC regulation for industrial electronics

Procurement Notes

Verify the specific suffix 'ME2' against the manufacturer's latest datasheet to confirm pinout compatibility and functional equivalence. Ensure that the required output current does not exceed the 1.5 A limit under all thermal conditions. Confirm RoHS compliance status and check for any recent lifecycle notifications regarding obsolescence before finalizing procurement plans.

Selection Notes

Select this component when a wide input voltage range up to 42 V is required alongside moderate current delivery. The integrated FET simplifies layout compared to discrete solutions. Consider the 300 kHz switching frequency for balancing efficiency and passive component size. Verify that the application environment stays within the specified -40°C to +105°C operating temperature range for reliable performance.

Part Context

This part belongs to the BD9G2xx series of integrated MOSFET buck converters designed for automotive and industrial applications. The series utilizes current mode control for stability and speed. The BD9G201 variant specifically targets applications requiring up to 1.5 A output current, distinguishing it from higher-current counterparts like the BD9G4xx series which support up to 3.5 A.

Replacement Considerations

The BD9G201UEFJ-ME2 is a documented substitute within the same family. Both parts share identical electrical specifications and functionality. Verify that the HTSOP-J8 package dimensions are compatible with the target PCB footprint before substitution.