BD9325FJ-E2

Overview

The BD9325FJ-E2 is a single-step-down DC/DC converter manufactured by ROHM Semiconductor. It integrates a low on-resistance power MOSFET and controller within a single chip, supporting an input voltage range of 4.75 V to 18 V. The device delivers a continuous output current of 2 A with adjustable output voltage from 0.9 V to 16.2 V. Operating at a switching frequency of 380 kHz, it features synchronous rectification for improved efficiency. The component operates within a temperature range of -40 °C to +85 °C and is housed in an 8-pin SOP-J package.

Feature Summary

• Integrates a low on-resistance power MOSFET and control circuitry into a single chip to minimize external component count.
• Employs current-mode control architecture to achieve high-speed response characteristics and simplified phase compensation.
• Features synchronous rectification topology to enhance conversion efficiency across the operating load range.

Applications

• Portable electronic devices requiring efficient step-down power regulation
• Industrial equipment utilizing wide input voltage ranges
• Embedded systems needing compact power management solutions

Procurement Notes

Verify the specific suffix E2 against the manufacturer's datasheet to confirm RoHS compliance and lead-free status. Ensure the ordering information matches the required packaging format, such as tube or reel, as specified in the official documentation. Cross-reference the pinout and thermal characteristics with the SOP-J8 footprint before finalizing procurement orders.

Selection Notes

Select this component when a buck converter with integrated power FETs is required for space-constrained designs. It is suitable for applications demanding a wide input voltage range up to 18 V and a maximum output current of 2 A. Consider the 380 kHz switching frequency for balancing component size and efficiency requirements in standard industrial or consumer electronics environments.

Part Context

This part belongs to the BD9325 series of integrated MOSFET DC-DC converters. These devices are designed to reduce system costs by minimizing the number of external components needed. The series utilizes current-mode control to provide fast transient response, making them appropriate for various general-purpose power supply applications where compactness and reliability are prioritized.

Replacement Considerations

Consult the official ROHM replacement guide for verified substitutes. Ensure any alternative maintains compatible input/output voltage ranges, current capabilities, and package dimensions. Verify that the substitute supports the same control topology and thermal performance specifications.