KA78L09AZTA

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

The KA78L09AZTA is a fixed positive standard linear voltage regulator manufactured by onsemi (formerly Fairchild Semiconductor). It provides a nominal output voltage of 9 V with a maximum output current capability of 100 mA. The device operates within an input voltage range of 11.5 V to 35 V and features thermal overload protection and short-circuit current limiting. It is housed in a TO-92-3 through-hole package and supports an operating temperature range from 0°C to +125°C.

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

• Provides stable fixed positive voltage regulation for low-current applications
• Includes internal thermal overload protection to prevent damage during overheating
• Features short-circuit current limiting to protect the device under fault conditions

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

• Low-power electronic circuits requiring a regulated 9 V supply
• Battery-powered devices needing efficient voltage stabilization
• General-purpose power management in consumer electronics

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

Verify the manufacturer designation, as this component is currently produced by onsemi following corporate restructuring. Confirm the specific suffix 'AZTA' corresponds to the TO-92-3 package and Ammo Pack shipping format. Check for End-of-Life (EOL) status or Last Time Buy notices, as availability may be limited. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement decisions.

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

Select this component when a reliable 9 V output at up to 100 mA is required in a compact TO-92 package. It is suitable for designs prioritizing built-in safety features like thermal shutdown and current limiting. Consider the input voltage headroom requirement of at least 2.5 V above the output voltage. Evaluate thermal dissipation capabilities given the 750 mW power dissipation limit in the specified package.

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 offers various fixed output voltages including 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, and 24V. These regulators are designed for general-purpose use, providing simple voltage regulation solutions for circuits requiring currents up to 100 mA.

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

Compatible substitutes include MC78L09ACZP and LM78L09ACZ. Verify pinout compatibility (Input, Ground, Output) and ensure the replacement supports the same 100 mA current rating and TO-92 package type.