BD9329AEFJ-LBE2

Overview

The BD9329AEFJ-LBE2 is a synchronous step-down switching regulator from ROHM Semiconductor, integrating two low-resistance N-channel MOSFETs. It delivers a continuous output current of 3A over a wide input supply range of 4.2V to 18.0V. The device operates at a fixed frequency of 380 kHz and features a feedback voltage accuracy of ±1.5% at room temperature. It utilizes current mode control for fast transient response and includes protection circuits such as under-voltage lockout, thermal shutdown, and over-current protection.

Feature Summary

• Integrates high-side and low-side power switches with low on-resistance for efficient power conversion
• Provides fast transient response through current mode operation and simplified phase compensation
• Includes comprehensive protection mechanisms including thermal shutdown and over-current protection

Applications

• Distributed power systems
• Pre-regulator stages for linear regulators

Procurement Notes

Verify the specific suffix (LBE2) against the manufacturer's latest datasheet to confirm pinout compatibility and electrical specifications. Ensure the component status is active for new designs, as older variants may be obsolete. Confirm RoHS compliance requirements match your manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when a single-chip solution is required for 3A loads with an input voltage up to 18V. The integrated MOSFETs reduce external component count compared to discrete solutions. Consider the HTSOP-J8 package size and exposed thermal pad requirements for PCB layout and heat dissipation planning in space-constrained applications.

Part Context

This part belongs to the BD9329 series of simple step-down switching regulators. It is designed as a single-chip type with built-in FETs, offering a compact alternative to multi-component buck converter designs. The series targets applications requiring high efficiency and minimal external circuitry within a small footprint.

Replacement Considerations

Check for direct substitutes like the BD9329AEFJ or BD9329AEFJ-LB, ensuring functional equivalence in current rating and input voltage range. Verify that any replacement maintains the same HTSOP-J8 package dimensions and thermal characteristics to fit existing board layouts without modification.