BD3531F-FE2

Special Purpose Regulators Overview

The BD3531F-FE2 is a specialized DDR-SDRAM termination regulator manufactured by ROHM Semiconductor. It integrates a push-pull power supply for termination voltage (VTT), a reference voltage circuit (VREF), and an enabler within a single SOP-8 package. The device operates with an input voltage range of 4.5 V to 5.5 V and provides a maximum output current of 1.5 A. It features built-in thermal shutdown protection and under-voltage lockout (UVLO) mechanisms. Designed for dual-channel DDR-II compatibility, it supports stable termination regulation for high-speed memory interfaces.

Special Purpose Regulators Feature Summary

• Integrates a push-pull power supply specifically designed for DDR termination voltage generation
• Includes an internal reference voltage circuit and dedicated enabler control logic
• Provides comprehensive protection through integrated thermal shutdown and under-voltage lockout circuits

Special Purpose Regulators Applications

• Power supply for DDR I/II SDRAM termination
• Dual channel DDR-II compatible systems
• High-speed memory interface termination regulation

Special Purpose Regulators Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm availability through authorized distributors or secondary markets as standard production may have ceased. Ensure that any replacement strategy accounts for lead time variations inherent in end-of-life components. Validate pin compatibility if substituting with newer equivalents from the same manufacturer family.

Special Purpose Regulators Selection Notes

Select this component when designing systems requiring dedicated termination regulation for DDR memory architectures. The integrated push-pull topology eliminates the need for external discrete drivers. Verify that the system input voltage remains within the specified 4.5 V to 5.5 V range to ensure proper UVLO operation and stable VTT output. Consider the SOP-8 package constraints for thermal management in dense PCB layouts.

Special Purpose Regulators Part Context

This part belongs to ROHM's specialized PMIC line focused on memory interface support. It addresses the specific power integrity requirements of DDR SDRAM buses. The series is engineered to provide precise termination voltage control, which is critical for signal integrity in high-speed digital designs. It represents a consolidated solution compared to discrete resistor divider and driver approaches.

Special Purpose Regulators Replacement Considerations

BD3532F-E2 is a confirmed substitute offering higher output current capability while maintaining similar functionality and package form factor.