KA78L05AZTA

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

The KA78L05AZTA is a fixed voltage monolithic integrated circuit linear regulator manufactured by onsemi (formerly Fairchild Semiconductor). It provides a nominal output voltage of 5V with a tolerance of ±5%. The device supports a maximum output current of 100mA and operates within an ambient temperature range of 0°C to +125°C. It utilizes a TO-92 three-terminal package for through-hole mounting. Key electrical characteristics include a typical quiescent current of 2.0mA, a ripple rejection ratio of 48dB at 120Hz, and a dropout voltage of approximately 1.7V.

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

• Integrated thermal overload protection prevents damage during excessive heat conditions.
• Built-in short-circuit current limiting safeguards the component against output faults.
• Requires no external components for basic operation as a fixed positive voltage regulator.

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

• Power supply sections for portable equipment requiring low current
• On-card regulation for local logic power distribution
• General-purpose positive voltage regulation in consumer electronics

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

Verify that the specific part number KA78L05AZTA matches the required ±5% voltage tolerance and TO-92 Ammo Pack packaging configuration. Confirm the manufacturer origin, as this component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Ensure the procurement source provides valid traceability documentation for legacy semiconductor parts.

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

Select this component when a simple, robust 5V regulation solution is needed for loads up to 100mA. The TO-92 package is suitable for applications where board space allows for through-hole mounting. Consider the thermal dissipation limits carefully, as the maximum power dissipation is restricted to 0.75W without adequate heat sinking or lead length utilization.

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

This component belongs to the KA78LXXA series of three-terminal positive voltage regulators. The series offers various fixed output voltages ranging from 3.3V to 24V. The 'L' designation indicates the lower current capability compared to standard 78xx regulators, making it appropriate for compact designs where moderate current delivery is sufficient.

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

Compatible substitutes include the KA78L05AAZTA variant, which offers tighter ±2% voltage tolerance while maintaining identical pinout and performance specifications. Other equivalents in the broader 78L05 family may be considered if package and tolerance requirements are flexible.