BD9E300EFJ-LBH2

Overview

The BD9E300EFJ-LBH2 is a synchronous buck switching regulator IC from ROHM Semiconductor, designed for industrial applications. It features an integrated power MOSFET and operates within an input voltage range of 7V to 36V. The device provides a single adjustable output ranging from 1V to 25.2V with a maximum output current of 2.5A. Operating at a fixed switching frequency of 1MHz, it utilizes current-mode control for fast transient response. The component is housed in an 8-pin HTSOP-J package with a bare pad for thermal dissipation and supports a junction temperature range from -40°C to +150°C.

Feature Summary

• Integrates low on-resistance power MOSFETs and controller in a synchronous buck topology
• Utilizes current-mode control architecture for high-speed transient response performance
• Supports wide input voltage range suitable for generating low voltages such as 5.0V
• Features long-term supply guarantee for industrial equipment markets

Applications

• Industrial equipment power supplies
• General-purpose DC/DC conversion systems
• Embedded systems requiring stable low-voltage rails

Procurement Notes

Verify the specific suffix LH2 against official datasheets to confirm pinout and electrical characteristics, as suffixes may indicate packaging or revision differences. Confirm RoHS compliance status and check for any Product Change Notices (PCN) that might update specifications without altering electrical performance. Ensure the source document explicitly identifies this part number rather than generic family data.

Selection Notes

Select this component when a compact synchronous buck solution with integrated FETs is required for industrial environments. The 1MHz switching frequency allows for smaller external inductors compared to lower-frequency alternatives. Verify that the required output voltage falls within the 1V to 25.2V adjustable range and that the load current does not exceed 2.5A. Consider the thermal requirements of the HTSOP-J package for heat dissipation.

Part Context

This part belongs to the BD9E300 series of switching voltage regulators from ROHM Semiconductor. The series is characterized by built-in power MOSFETs and constant on-time control methods, which provide fast transient responses and low standby power consumption. These devices are targeted at industrial markets and offer long-term supply stability.

Replacement Considerations

Check for updated replacement parts if the BD9E300EFJ-LBH2 is subject to obsolescence notices. Consult ROHM documentation for direct substitutes within the BD9E300 series or other compatible synchronous buck regulators with similar input/output specifications and package dimensions.