KA78L05AAZBU

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

The KA78L05AAZBU 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 ±2% tolerance. The device supports a maximum output current of 100mA and operates within an input voltage range up to 30V for the 5V variant. It features thermal overload protection and short circuit current limiting. The component is housed in a TO-92 package and is rated for an operating junction temperature range of 0°C to +150°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 device against output faults.
• Monolithic construction ensures stable operation with high ripple rejection.

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

• Power supply circuits requiring regulated 5V DC
• Battery-powered equipment power management
• General-purpose positive voltage regulation

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

Verify the manufacturer origin, as the part was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm the specific suffix 'BU' corresponds to bulk packaging in TO-92 format. Ensure the datasheet revision matches the required electrical characteristics for your design constraints.

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

Select this component when a fixed 5V output with tight ±2% tolerance is required. It is suitable for applications needing up to 100mA load current. Consider the thermal dissipation limits inherent to the TO-92 package for steady-state operation.

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

This regulator belongs to the KA78LXXA series of three-terminal positive voltage regulators. The 'AA' designation indicates a tighter voltage tolerance compared to standard variants. The series is designed for general-purpose applications where compact size and reliable regulation are prioritized over high-current capabilities.

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

Compatible substitutes include other 5V 100mA linear regulators in TO-92 packages such as the MC78L05 or UA78L05. Verify pinout compatibility and thermal performance specifications before substitution.