BD433S2WFP3-CE2

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BD433S2WFP3-CE2 is an automotive-grade low dropout (LDO) voltage regulator from the BD4xxS2-C series, manufactured by ROHM Semiconductor. It provides a fixed 3.3V output with a maximum continuous current of 200mA and features an enable input for shutdown control. The device operates within an absolute maximum withstand voltage of 45V and supports an input voltage range up to 42V. Key electrical specifications include a typical quiescent current of 40µA, output voltage accuracy of ±2%, and a ripple rejection ratio of 65dB. It incorporates overcurrent protection and thermal shutdown circuits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Features an enable input that allows the output to be turned on or off via high or low logic levels applied to the CTL pin.
• Includes built-in overcurrent protection to prevent IC damage during output short circuits and thermal shutdown to protect against overheating under overload conditions.
• Designed for direct battery connection systems to minimize consumption current, utilizing ceramic capacitors for output phase compensation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive electronic systems requiring low quiescent current operation
• Battery-connected circuits where standby power consumption must be minimized
• Systems requiring reliable 3.3V regulation with enable/disable functionality

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix CE2 to confirm RoHS compliance and lead time alignment with the long-term supply plan. Confirm the SOT-223-4 package variant matches your PCB footprint requirements. Ensure the design accounts for the 45V absolute maximum rating to prevent device failure during transient voltage events in automotive environments.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 3.3V output with 200mA capability and low static current is required for automotive applications. It serves as a production-line change replacement for the BD433M2WFP3-CE2, offering identical technical specifications and documentation. Consider the SOT-223-4 package constraints and the need for external ceramic capacitors for stability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the BD4xxS2-C series of low quiescent current regulators designed for automotive use. The BD433S2WFP3-CE2 was formed by changing the production line of the BD433M2WFP3-C model to improve manufacturing efficiency. ROHM indicates that there are no differences in guaranteed characteristics between these variants, allowing for direct substitution in existing designs without requalification.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The BD433M2WFP3-CE2 is the predecessor model produced on a different line. Technical specifications, datasheets, and design models are identical. No functional changes occur due to the suffix difference; it represents a manufacturing process update rather than a design revision.