KA78L12AZBU

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

The KA78L12AZBU is a fixed voltage monolithic integrated circuit positive regulator from the KA78LXXA series, manufactured by Fairchild Semiconductor. It provides a nominal output voltage of 12 V with ±5% tolerance at 25°C. The device supports a maximum output current of 100 mA and operates within an input voltage range of 14.5 V to 27 V. It features thermal overload protection and short circuit current limiting. The component is housed in a TO-92 package and is rated for operation between 0°C and +125°C.

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

• Integrated thermal overload protection prevents damage during overheating conditions.
• Short circuit current limiting safeguards the device against output faults.
• Fixed 12 V output eliminates the need for external resistive components.

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

• Local or card-level regulation for electronic circuits
• Power supply management systems
• Industrial equipment power distribution

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

Verify the manufacturer origin, as the datasheet indicates Fairchild Semiconductor while onsemi holds related trademarks. Confirm the specific ordering suffix 'BU' corresponds to bulk packaging rather than tape and reel variants like 'TA'. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards.

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

Select this component when a stable 12 V source is required for low-current applications up to 100 mA. Consider the TO-92 package constraints regarding heat dissipation, as power dissipation is limited to 0.75 W without adequate heat sinking. Verify that the input voltage remains within the specified limits to maintain proper line regulation.

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

This part belongs to the KA78LXXA series of three-terminal positive voltage regulators. The series includes various fixed output voltages ranging from 5 V to 24 V. These regulators are designed for general-purpose use where supply currents do not exceed 100 mA, offering a robust solution for basic voltage regulation tasks.

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

Equivalent parts include LM78L12ACZ and MC78L12ACPG. Verify pinout compatibility and electrical specifications before substitution.

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

What is the maximum power dissipation for the KA78L12AZBU?

The maximum power dissipation is 0.75 W, which is dependent on the heat sinking and lead length of the package.

Does the KA78L12AZBU require external bypass capacitors?

Bypass capacitors are recommended for optimum stability and transient response and should be located as close as possible to the regulator.