KA78L18AZTA

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

The KA78L18AZTA is a fixed positive linear voltage regulator from the KA78LXXA series, manufactured by onsemi. It provides a nominal output voltage of 18 V with a ±5% tolerance at 25°C. The device supports a maximum output current of 100 mA and operates within an input voltage range of 21 V to 33 V. Electrical characteristics include a typical line regulation of 145 mV and load regulation of 30 mV at 25°C. The unit features thermal overload protection and short circuit current limiting, housed in a TO-92 package.

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 for local on-card regulation.

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

• Local on-card voltage regulation
• Logic system power supplies
• Instrumentation circuits

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

Verify the specific ordering suffix AZTA confirms the Ammo Pack packaging format as documented in the official Fairchild/Onsemi ordering information table. Confirm that the manufacturer designation aligns with current corporate records following industry acquisitions. Ensure compliance with applicable environmental directives such as RoHS requirements before finalizing procurement specifications.

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

Select this component when a fixed 18 V supply is required with a maximum load current of 100 mA. Verify that the available input voltage remains between 21 V and 33 V to maintain proper regulation. Consider the thermal dissipation limits inherent to the TO-92 package, which restricts steady-state power handling based on heat sinking and lead length configurations.

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 5 V, 6 V, 8 V, 9 V, 10 V, 12 V, 15 V, 18 V, and 24 V. These regulators are designed to replace single-point regulation schemes, offering improved effective output impedance and lower quiescent current for solid-state electronic combinations.

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

Direct substitute part numbers include MC78L18ABPG and MC78L18ACPG.

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

What is the maximum input voltage for the KA78L18AZTA?

The absolute maximum input voltage rating for the KA78L18 variant is 35 V.

Does the KA78L18AZTA include internal protection mechanisms?

Yes, the device includes both thermal overload protection and short circuit current limiting.