KA78L12AD

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

The KA78L12AD is a monolithic fixed voltage linear regulator from the KA78LXXA series, manufactured by Fairchild Semiconductor. It provides a nominal 12V output with a maximum current of 100mA in an 8-SOP package. The device features internal thermal overload protection and short circuit current limiting. Electrical characteristics include a line regulation of 250mV (14.5V to 27V input) and load regulation of 100mV (1mA to 100mA load). It operates within a junction temperature range of 0°C to +150°C.

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

• Integrated thermal overload protection for robust operation under high stress conditions
• Internal short circuit current limiting prevents damage during fault scenarios
• Fixed 12V output eliminates the need for external components in standard applications

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

• Local or on-card voltage regulation
• Battery-powered circuitry power supplies
• Post-regulation for switching power supplies

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

Verify the manufacturer origin as this component was originally produced by Fairchild Semiconductor prior to corporate restructuring. Confirm that the specific ordering suffix 'AD' corresponds to the 8-SOP tube packaging format. Ensure compatibility with the intended operating temperature range and verify RoHS compliance status for the specific production batch before integration into final designs.

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

Select this component when a compact surface-mount solution is required for low-current 12V regulation. The 8-SOP package offers a smaller footprint compared to through-hole alternatives like TO-92. Consider the dropout voltage and thermal dissipation capabilities relative to the expected input voltage and ambient temperature to ensure stable performance without excessive heat generation.

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

This part belongs to the KA78LXXA/KA78L05AA family of three-terminal positive voltage regulators. These devices are designed as cost-effective replacements for traditional Zener diode resistor combinations, offering significantly lower output impedance and quiescent current variations. The series supports multiple fixed output voltages ranging from 5V to 24V.

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

Compatible substitutes include MC78L12ACPG and LM78L12ACZX. Verify pinout compatibility and package dimensions when transitioning between manufacturers to ensure proper board layout fit.