BD18KA5WF-E2

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

The BD18KA5WF-E2 is a fixed-output low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a stable 1.8 V output with a maximum current capacity of 500 mA. The device operates within an input voltage range of 2.3 V to 5.5 V and features a typical dropout voltage of 120 mV at 0.2 A load. It offers high accuracy with ±1% output voltage tolerance at 25°C and includes ripple rejection of 50 dB. Integrated protection circuits include overcurrent, thermal shutdown, and a zero-current shutdown function. The component is housed in an SOP-8 package and supports operation from -40°C to +105°C.

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

• Integrated ON/OFF switch reduces circuit current to 0 µA during shutdown for enhanced power efficiency.
• Built-in overcurrent and thermal protection circuits prevent IC damage under short-circuit or overload conditions.
• Low saturation design ensures stable regulation with minimal voltage drop across the device.

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

• Local power supply circuits for consumer electronics
• Power management for portable devices requiring compact form factors
• General-purpose voltage regulation in digital equipment

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

Verify the specific suffix E2 against official ROHM documentation to confirm compliance with RoHS directives and lead-free status. Confirm that the SOP-8 package variant matches your PCB footprint requirements. Ensure the fixed 1.8 V output aligns with your system's voltage rails, as adjustable variants exist within the same series. Check for any automotive usage restrictions noted in the manufacturer's guidelines.

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

Select this component when a fixed 1.8 V rail is required with moderate current demands up to 500 mA. The SOP-8 package suits applications prioritizing space efficiency over high-power dissipation capabilities. Consider the 120 mV typical dropout if input voltages are close to the output level. Evaluate the thermal performance given the 687.6 mW power dissipation limit in this package type.

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

This part belongs to the BD18KA5WF series of secondary LDO regulators designed for miniaturization and energy saving. The series offers various fixed output voltages and packaging options. The BD18KA5WF-E2 specifically targets applications needing precise voltage regulation with integrated safety features in a small surface-mount footprint.

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

Consult ROHM datasheets for direct pin-compatible alternatives within the BD18KA5WF family offering different fixed voltages. Verify if upgraded packages like HTSOP-J8 are available for improved thermal handling in similar applications.