BD18KA5WFP-E2

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

The BD18KA5WFP-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 ripple rejection of 50 dB and maintains voltage regulation accuracy within ±1%. Integrated protection circuits include thermal shutdown and over-current protection. The component is housed in a TO-252-5 surface-mount package and supports operation across a temperature range from -40°C to +105°C.

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

• Integrates an on/off switch that reduces circuit current to 0 μA during shutdown mode for enhanced power efficiency.
• Includes built-in over-current protection and thermal shutdown circuits to prevent IC damage under fault conditions.
• Delivers precise voltage regulation with ±1% accuracy at 25°C, suitable for stable local power supply applications.

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

• Local power supply circuits for hard disk drives (HDD)
• Power management in personal computers (PC)
• Voltage regulation for DVD players
• Audio systems in automotive applications

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

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm compliance with RoHS directives and REACH standards. Ensure the procurement channel provides original documentation matching the BD18KA5WFP-E2 part number. Confirm that the TO-252-5 package variant aligns with the design requirements. Check for any regional restrictions or end-of-life notices directly from ROHM Semiconductor before finalizing orders.

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

Select this component when a fixed 1.8 V rail is required with up to 500 mA load capability. The low dropout characteristic makes it suitable for battery-powered devices where input voltage may approach the output level. The integrated shutdown function aids in extending battery life. Verify that the input voltage does not exceed 5.5 V and that the thermal dissipation capabilities of the TO-252-5 package are sufficient for the expected ambient conditions.

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

This part belongs to the BD18KA5WFP series of secondary LDO regulators designed for miniaturization and energy saving. The series offers various fixed output voltages and packages. The BD18KA5WFP-E2 specifically denotes the 1.8 V fixed output version in the TO-252-5 package. It is categorized under PMIC - Power Management ICs within ROHM's product lineup.

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

Consult the official ROHM datasheet for direct pin-compatible substitutes within the same series, such as other voltage variants in the BDxxKA5WFP family. Verify if alternative manufacturers offer equivalent 1.8 V, 500 mA LDOs with similar dropout and protection features. Cross-reference package dimensions and electrical parameters to ensure functional compatibility.