KA78L05AZTF

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

The KA78L05AZTF is a discontinued linear voltage regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a fixed positive output voltage of 5 V with a maximum output current of 100 mA. The device operates within an input voltage range of 7 V to 30 V and features a TO-92-3 through-hole package. Key electrical specifications include a line regulation of 150 mV, load regulation of 60 mV, and a typical power supply rejection ratio (PSRR) of 80 dB. The component 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 electronic circuits
• Designed for low-current applications requiring up to 100 mA output
• Utilizes a compact three-terminal TO-92 through-hole package

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

• General-purpose power supply regulation in consumer electronics
• Biasing stages in analog signal processing circuits
• Voltage reference sources for microcontroller systems

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

This component is officially listed as obsolete and no longer in production by the manufacturer. Availability is restricted to surplus or secondary market channels. Verify authenticity and condition carefully when sourcing from non-direct suppliers. Ensure compatibility with existing PCB footprints before procurement, as replacement components may require design adjustments.

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

Select this component only if legacy compatibility with the TO-92-3 package and 5 V/100 mA specification is required. Consider modern equivalents from onsemi or other manufacturers if new designs are feasible. Evaluate thermal dissipation requirements, as the TO-92 package has limited power handling capabilities compared to surface-mount alternatives.

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

The KA78L05AZTF belongs to the KA78L series of three-terminal positive voltage regulators originally produced by Fairchild Semiconductor. Following Fairchild's acquisition by onsemi, product lines were integrated into the broader onsemi portfolio. This specific part represents a standard 5 V regulator variant widely used in older electronic designs before being phased out for newer technologies.

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

Verify pinout compatibility with MC78L05ACHT1G or similar onsemi equivalents. Check datasheet differences regarding thermal resistance and packaging dimensions. Ensure substitute parts meet the same 100 mA current rating and 5 V output tolerance.