BD433S5EFJ-CE2

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

The BD433S5EFJ-CE2 is a fixed-output low dropout (LDO) voltage regulator manufactured by ROHM Semiconductor, designed for automotive applications. It provides a stable 3.3V output with a maximum current capacity of 500mA. The device features a typical quiescent current of 38uA and offers an output voltage accuracy of ±2%. It operates within an input voltage range of 4V to 42V, supporting a maximum withstand voltage of 45V. Key performance metrics include a typical ripple rejection of 60dB, line regulation of 10mV, and load regulation of 10mV. The component is housed in an HTSOP-J8 package and functions reliably across a junction temperature range from -40°C to +150°C.

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

• Automotive-grade reliability with high voltage withstand capability suitable for direct battery connection
• Low quiescent current consumption to minimize power loss in standby modes
• Integrated thermal shutdown and overcurrent protection for enhanced system safety

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

• Automotive electronic control units requiring stable 3.3V logic supply
• Infotainment systems and dashboard instrumentation power management
• Sensor interface circuits in harsh environmental conditions

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

Verify the specific suffix CE2 matches your design requirements, as it denotes the standard tape and reel packaging configuration. Confirm that the HTSOP-J8 footprint aligns with your PCB layout constraints. Ensure compliance with RoHS directives if required by your manufacturing standards. Cross-reference the datasheet for precise thermal dissipation calculations based on your expected load current and ambient temperature conditions.

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

Select this component when a robust 500mA LDO is needed for automotive environments with input voltages up to 42V. It is appropriate for designs prioritizing high voltage tolerance and integrated protection features over ultra-low noise specifications. Consider alternative packages like TO252-3 if board space allows for different thermal profiles or if SMD/SMT mounting preferences differ from the HTSOP-J8 form factor.

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

This part belongs to the BD4xxS5-C series of low quiescent current regulators developed specifically for automotive use. The series is characterized by its ability to handle high input voltages while maintaining tight output voltage accuracy. It serves as a critical power management solution for modern vehicle electronics that demand high reliability and efficient power conversion under varying load and temperature conditions.

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

The BD433S5FP-CE2 is a confirmed substitute offering identical electrical specifications but utilizes a TO252-3 package instead of HTSOP-J8. Verify pinout compatibility and thermal performance differences before swapping. Other series members like BD433M2FP3-CE2 provide lower current ratings and are not direct replacements for 500mA requirements.