BD33KA5WF-E2

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

The BD33KA5WF-E2 is a fixed-output low-dropout linear regulator manufactured by ROHM Semiconductor. It provides a stable 3.3 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, with a maximum of 200 mV. It offers high accuracy with a voltage regulation tolerance of 1%. Key electrical specifications include a line regulation of 10 mV, load regulation of 25 mV, and a typical power supply rejection ratio (PSRR) of 50 dB. The quiescent input bias current is 550 uA, and the maximum power dissipation is rated at 687.6 mW.

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

• Provides a fixed 3.3 V output with ±1% accuracy for precise local power supply applications.
• Features ultra-low saturation characteristics allowing operation with minimal input-to-output voltage difference.
• Integrates comprehensive protection circuits including over-current protection and thermal shutdown to ensure device reliability under fault conditions.

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

• Local power supply regulation in portable electronic devices
• Power management in personal computers and hard disk drives
• Voltage regulation for automotive audio systems

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

Verify the complete part number including the suffix -E2 to confirm compliance with specific environmental standards and manufacturing revisions. Confirm that the SOP-8 package variant matches the intended PCB footprint and thermal requirements. Ensure input voltage constraints are respected to maintain regulation performance and prevent excessive power dissipation within the specified operating temperature range.

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

Select this component when a fixed 3.3 V rail is required with moderate current demands up to 500 mA. It is suitable for designs prioritizing low dropout performance and high accuracy over higher current capabilities. Consider the SOP-8 package for surface-mount assembly where thermal dissipation limits are manageable within the 687.6 mW power rating.

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

This regulator belongs to the BD33KA5WF series of secondary LDO regulators designed for small size and low noise. The series targets applications requiring stable operation with integrated protection features. It serves as a solution for local power distribution in consumer electronics and automotive infotainment systems where space efficiency and circuit stability are critical design parameters.

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

BD33KA5WF is listed as an alias for this part number. Verify pinout compatibility and thermal characteristics before substituting with other 500 mA LDOs from different manufacturers.