KA78RM33

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

The KA78RM33 is a fixed positive low-dropout voltage regulator providing a 3.3V output with a maximum current of 0.5A. It operates within an input voltage range of 4.3V to 16V, with a maximum absolute rating of 20V. The device features a dropout voltage of 0.6V at full load and maintains line regulation of 20mV and load regulation of 20mV. Quiescent current is typically 5mA. It supports junction temperatures from -25°C to +125°C.

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

• Integrated overcurrent protection, thermal shutdown, and Safe Operating Area (SOA) protection for enhanced reliability.
• Low dropout voltage capability ensures efficient power delivery under varying load conditions.
• Designed for surface mount applications using the D-PAK package.

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

• Constant voltage power sources for electronic equipment
• Battery-powered systems requiring low dropout performance
• Portable devices with limited headroom

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated in official documentation. Check for obsolescence notices, as Fairchild Semiconductor products may have specific lifecycle statuses. Ensure packaging type matches design requirements before procurement.

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

Select this regulator when a fixed 3.3V output is required with moderate current demands up to 0.5A. Consider the D-PAK package for surface mount implementations. Evaluate thermal management needs based on the specified junction-to-air thermal resistance. Ensure input voltage remains within the operational range to maintain regulation.

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

This component belongs to the KA78R series of low-dropout regulators manufactured by Fairchild Semiconductor. It is designed for general-purpose voltage regulation tasks where space efficiency and thermal protection are prioritized. The series includes variants for different packages and operating temperature ranges.

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

Direct substitutes include KA78RM33TU and KA78RM33RTF from the same manufacturer family. Cross-manufacturer equivalents should match the 3.3V output, 0.5A current rating, and TO-220/D-PAK package constraints.

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

What is the maximum dropout voltage specified for the KA78RM33?

The maximum dropout voltage is 0.6V when the output current is at its rated 0.5A.

Does the KA78RM33 include internal protection circuits?

Yes, it includes overcurrent protection, thermal shutdown, and SOA (Safe Operating Area) protection.