BD18HA3MEFJ-ME2

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

The BD18HA3MEFJ-ME2 is an automotive-grade low-dropout linear regulator manufactured by ROHM Semiconductor. It provides a single adjustable output voltage ranging from 1.5 V to 7 V with a maximum continuous output current of 300 mA. The device features a typical dropout voltage of 600 mV and a reference voltage of 800 mV, ensuring high accuracy with a regulation tolerance of 1%. Designed for robust performance in harsh environments, it operates within a temperature range of -40°C to +105°C and holds AEC-Q100 qualification. Packaged in an HTSOP-J8 surface-mount format, it supports line and load regulation of 25 mV each.

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

• AEC-Q100 qualified for automotive reliability standards
• Adjustable output voltage capability via external resistors
• High-accuracy voltage regulation with 1% tolerance
• Low quiescent current consumption for efficiency

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

• Automotive electronic control units (ECUs)
• Infotainment system power distribution
• Sensor module power supply conditioning
• Body electronics power management

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

Verify the specific suffix ME2 against the official datasheet to confirm package type and tape/reel specifications. Ensure design compliance with AEC-Q100 requirements if deployed in automotive systems. Confirm availability status as lifecycle stages may change; check for NRND notices before finalizing procurement plans.

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

Select this component when an adjustable output voltage between 1.5 V and 7 V is required with a 300 mA current capacity. It is suitable for applications demanding high accuracy and automotive certification. Consider thermal dissipation limits based on input-output differential and ambient temperature conditions during selection.

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

This part belongs to the BD18HA3 series of automotive LDO regulators. It shares the HTSOP-J8 package and core regulatory architecture with other variants in the family, differing primarily in output configuration and current ratings. It serves as a specialized solution for precise voltage regulation in vehicle electrical architectures.

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

Direct substitutes include BD00HA3VEFJ-ME2 for similar adjustable functionality or BD18GA3MEFJ-ME2 for fixed 1.8V output needs. Verify pin compatibility and thermal characteristics when cross-referencing with other ROHM automotive LDOs.

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

What is the minimum input voltage required for proper regulation?

The minimum input voltage depends on the output voltage setting plus the dropout voltage. With a typical dropout of 600 mV at 300 mA, the input must exceed the desired output voltage by at least this margin.

Is this regulator suitable for high-voltage automotive bus applications?

No, the BD18HA3VEFJ-ME2 is designed for lower voltage domains. For higher input voltages up to 14 V or 28 V, other series such as BD18GC0VEFJ-ME2 should be considered.