BD450U2WEFJ-CE2

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

The BD450U2WEFJ-CE2 is a fixed-output low dropout (LDO) regulator from ROHM Semiconductor, designed for automotive applications. It provides a stable 5 V output with a maximum current of 200 mA. The device features a typical quiescent current of 40 µA and an output voltage accuracy of ±2%. It operates within an input voltage range of 5.5 V to 42 V, with a maximum withstand voltage of 45 V. Key electrical parameters include a typical ripple rejection of 65 dB and a typical dropout voltage of 160 mV at 100 mA load. The component supports an operating junction temperature range from -40 °C to +150 °C and is housed in an HTSOP-J8 package.

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

• Integrated enable function allowing control of the output state via the CTL pin.
• Built-in overcurrent protection circuit to prevent damage during output short circuits.
• Thermal shutdown mechanism protects the IC from heat damage under overload conditions.

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

• Automotive battery direct connection systems requiring low standby current
• Fixed voltage regulation for automotive electronic control units
• Power management in high-voltage automotive environments

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

Verify the specific suffix and package variant against the official datasheet before procurement, as the BD4xxS2-C series includes multiple package options such as HTSOP-J8 and SOT-223-4. Confirm that the selected part matches the required output voltage and current specifications for the target application. Ensure compliance with automotive functional safety requirements if applicable to the system design.

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

Select this component when a fixed 5 V output is required with high input voltage tolerance up to 45 V. It is suitable for designs needing low quiescent current to minimize battery drain in standby modes. Consider the thermal performance and package type based on the available board space and heat dissipation requirements in the final assembly.

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

This part belongs to the BD4xxS2-C series of low quiescent current regulators developed for automotive use. The series is characterized by its ability to handle high input voltages while maintaining precise output regulation. It is designed to support functional safety analysis and is qualified for automotive environments, offering reliability in demanding operating conditions.

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

The BD450M2EFJ-CE2 is documented as a production change model within the same series, offering essentially identical technical specifications. Designers should verify that the replacement part meets all original design constraints regarding package dimensions and electrical performance before substitution.