BD12KA5FP-E2

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

The BD12KA5FP-E2 is a secondary low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor, designed for local power supply applications. It features a fixed output voltage of 1.2V with an accuracy of ±1.0% at 25°C. The device supports a maximum output current of 0.5A and operates within an input voltage range of 2.3V to 5.5V. Key electrical parameters include a typical dropout voltage of 0.12V at 0.2A output, a ripple rejection ratio of 50dB, and a load regulation of 25mV across the full current range. The quiescent circuit current is 0.35mA. It incorporates thermal shutdown and over-current protection circuits to ensure reliability under fault conditions.

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

• Integrated thermal shutdown and over-current protection circuits prevent IC damage during short-circuit or overload states.
• Low saturation design enables stable operation with minimal voltage drop between input and output terminals.
• High output voltage accuracy ensures precise power delivery for sensitive local power supply requirements.

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

• Local power supplies for television sets
• Power management in automotive audio systems
• Voltage regulation for hard disk drives (HDD)
• Power circuits for personal computers (PC)
• Supply regulation for DVD players

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

Verify that the specific suffix -E2 corresponds to the RoHS-compliant version as indicated in official documentation. Confirm the package type is TO-252-3 and check if the application requires the standard grade, noting that this product series is explicitly not recommended for use in automotive equipment despite some listed applications. Ensure input voltage constraints are met before integration.

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

Select this component when a fixed 1.2V output is required with up to 500mA load capability. It is suitable for space-constrained designs due to its small footprint and low quiescent current. Consider the thermal performance in high ambient temperatures, as the device lacks a discharge function and soft start feature. Verify that the application does not require automotive-grade qualification, as this is a standard-grade part.

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

This part belongs to the BD12KA5 series of secondary LDO regulators from ROHM, which are engineered for miniaturization and energy efficiency. The series offers various fixed output voltages and packaging options to support diverse consumer electronics. The BD12KA5FP-E2 specifically utilizes the TO-252-3 package, providing a balance between current handling capacity and board space savings compared to larger packages.

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

Direct substitutes within the same family include other fixed-output variants such as BD10KA5FP-E2 (1.0V), BD25KA5FP-E2 (2.5V), and BD30KA5FP-E2 (3.0V), provided the output voltage matches the system requirement. For adjustable output needs, the BD00KA5WFP-E2 may be considered, though it uses a different TO-252-5 package. Cross-model replacement requires verification of pin compatibility and thermal characteristics.