KA78L09AZBU

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

The KA78L09AZBU is a fixed positive voltage regulator from the KA78LXXA series, manufactured by onsemi (formerly Fairchild Semiconductor). It provides a nominal output of 9 V with ±5% tolerance and supports a maximum output current of 100 mA. The device operates within an input voltage range of 11.5 V to 24 V and features thermal overload protection and short circuit current limiting. It is housed in a TO-92 package and is rated for operation at junction temperatures up to +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 component against output faults.
• Monolithic construction ensures stable performance across specified operating ranges.

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

• Power supplies requiring regulated 9 V DC output
• Battery-powered equipment needing low quiescent current
• General-purpose electronic circuits

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

Verify that the ordering suffix 'BU' corresponds to bulk packaging as documented in the official datasheet. Confirm the manufacturer origin, noting historical production by Fairchild Semiconductor prior to acquisition by onsemi. Ensure the component meets the required temperature ratings and electrical specifications for your specific application environment.

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

Select this component when a fixed 9 V supply is needed with moderate current requirements up to 100 mA. Consider the TO-92 package constraints regarding power dissipation limits. Evaluate the dropout voltage characteristics relative to your minimum input voltage to ensure proper regulation under all load conditions.

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

This part belongs to the KA78LXXA family 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 applications where supply currents do not exceed 100 mA, offering a compact solution for standard voltage regulation tasks.

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

Compatible substitutes include MC78L09ABPRPG and L78L09ACUTR. Verify pinout compatibility and electrical parameters such as line/load regulation and dropout voltage before implementation.

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

What is the maximum power dissipation for the KA78L09AZBU?

The maximum power dissipation is limited to 0.75 W.

Does the KA78L09AZBU include internal protection features?

Yes, it includes thermal overload protection and short circuit current limiting.