BD18IA5WEFJ-E2

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

The BD18IA5WEFJ-E2 is a positive linear low-dropout voltage regulator manufactured by ROHM Semiconductor. It provides a fixed 1.8V output with a maximum continuous current of 0.5A. The device operates within an input voltage range of 2.4V to 5.5V and maintains a typical dropout voltage of 400mV at full load, with a maximum of 600mV. Quiescent current is specified at 5uA. Load regulation is rated at 1.5%, and line regulation at 1%. It functions reliably across a temperature range of -25°C to +85°C.

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

• Integrates overcurrent protection, thermal shutdown, and soft start functionality for robust operation under fault conditions.
• Supports ceramic output capacitors to facilitate compact circuit board design and enhanced long-term stability.
• Features high-accuracy voltage regulation with integrated ON/OFF switch control for efficient power management.

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

• Portable battery-powered electronic devices requiring stable low-voltage rails
• Digital home appliances utilizing microcontroller or logic circuit power supplies
• Communication equipment needing reliable linear regulation in space-constrained designs

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

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm package type and tape/reel specifications. Ensure compatibility with HTSOP-J8 footprint requirements during PCB layout. Confirm RoHS compliance status and moisture sensitivity levels prior to assembly processing to prevent damage during soldering operations.

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

Select this component when a fixed 1.8V rail is required with moderate current demands up to 500mA. The ultra-low quiescent current makes it suitable for battery-operated systems where standby power consumption is critical. Compare input voltage ranges against available supply rails to ensure sufficient headroom for the specified dropout characteristics.

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

This part belongs to the BD1xIA5WEFJ series of high-accuracy LDO regulators from ROHM. The series shares common protective features such as thermal shutdown and overcurrent limiting. Variations within the series typically differ only in the fixed output voltage setting, allowing designers to standardize on a single package and protection architecture across multiple voltage domains.

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

Cross-reference with BD12IA5WEFJ-E2, BD15IA5WEFJ-E2, BD25IA5WEFJ-E2, and BD33IA5WEFJ-E2 for alternative fixed voltages within the same package and current rating family.