BD12KA5WF-E2

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

The BD12KA5WF-E2 is a fixed-output low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a stable 1.2 V output with a maximum continuous current 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. Key electrical specifications include a ripple rejection ratio of 50 dB, line regulation of 10 mV, and load regulation of 25 mV. The quiescent current is typically 350 µA, with a maximum supply current of 550 µA. Power dissipation is rated at 687.6 mW. The component supports operation across a temperature range of -40°C to +105°C and includes overcurrent and thermal shutdown protection circuits.

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

• Integrates ON/OFF switch functionality for zero current consumption during shutdown
• Includes built-in overcurrent protection and thermal shutdown circuits
• Delivers high-precision fixed output voltage with ±1% accuracy

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

• Local power supply circuits for portable electronic devices
• Power management in hard disk drives (HDD)
• Voltage regulation for personal computers and DVD players
• Low-noise power sources for audio equipment

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

Verify the specific ordering suffix to confirm package type and tape/reel specifications. Confirm RoHS compliance status and REACH SVHC declarations prior to procurement. Ensure the supplier provides official datasheets matching the exact part number variant. Check moisture sensitivity level ratings if board storage conditions are critical. Validate that the source distributor is authorized to prevent counterfeit components.

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

Select this component when a fixed 1.2 V rail is required with moderate current demands up to 500 mA. The SOP-8 package offers a balance between thermal performance and board space efficiency. Consider the 120 mV dropout voltage for battery-powered applications where input voltage may approach the output level. Verify that the external capacitor requirements align with the stability criteria specified in the technical documentation.

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

This regulator belongs to the BD12KA5 series of secondary LDO regulators designed for miniaturization and energy efficiency. The series targets local power supplies in consumer electronics such as TVs, PCs, and HDDs. It distinguishes itself by combining high output current capability with compact surface-mount packaging. The product line emphasizes stability and noise reduction for sensitive digital and analog circuits.

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

Compatible alternatives within the same family include BD33KA5WF-E2 for 3.3 V output or BD00KA5WF-E2 for adjustable output configurations. Variants with different packages, such as BD12KA5WFP-E2 in TO252-5, offer similar electrical characteristics but require footprint adaptation. Cross-reference pinouts and thermal pads before substitution.