BD3533FVM-TR

Special Purpose Regulators Overview

The BD3533FVM-TR is a DDR termination regulator IC manufactured by ROHM Semiconductor, designed for power supply applications in DDR1/2 SDRAM systems. It operates within an input voltage range of 1 V to 5.5 V and delivers a maximum output current of 1 A. The device features an adjustable output voltage between 0.75 V and 1.25 V, with a quiescent operating current of 2 mA. It is housed in an 8-pin MSOP package and supports surface mount installation. The component functions reliably across a temperature range of -20°C to +100°C, with a maximum power dissipation of 437.5 mW.

Special Purpose Regulators Feature Summary

• Integrates a push-pull linear power supply for VTT termination with high-speed operational amplifier design for superior transient response.
• Provides independent reference input (VDDQ) and feedback (VTTS) pins to ensure precise output voltage accuracy and load regulation compliant with JEDEC standards.
• Includes a dedicated VREF output pin for powering memory controllers and maintains VREF output while VTT enters Hi-Z during Self Refresh states.

Special Purpose Regulators Applications

• Power supply for DDR1 SDRAM
• Power supply for DDR2 SDRAM
• DDR termination circuits

Special Purpose Regulators Procurement Notes

Verify the NRND status before procurement, as this component is not recommended for new designs. Confirm that the MSOP-8 package aligns with existing PCB footprints. Ensure the 1 A output current meets system requirements. Check RoHS compliance documentation if required by specific environmental regulations. Validate that the operating temperature range suits the target application environment.

Special Purpose Regulators Selection Notes

Select this component when designing DDR1 or DDR2 memory interfaces requiring a dedicated termination regulator. The MSOP-8 package is suitable for space-constrained surface-mount layouts. Consider the 1 A output limit against peak memory bus currents. The integrated thermal shutdown provides protection against overheating. Verify compatibility with the system's 3.3 V or 5.0 V bias supply requirements for internal MOSFET driving.

Special Purpose Regulators Part Context

This part belongs to the BD3533F series of specialized PMICs focused on DDR termination. It complements other regulators like the BD3533F-E2, which offers higher current capacity in a different package. The series addresses the specific power integrity needs of synchronous dynamic random-access memory modules.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. The BD3533F-E2 is a related variant but differs in package type and output current specifications.