KA78L12ADTF

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

The onsemi KA78L12ADTF is a fixed positive linear voltage regulator from the KA78LXXA series, manufactured by Fairchild Semiconductor. It provides a nominal output voltage of 12V with a ±5% tolerance at 25°C (range 11.4V to 12.6V). The device supports a maximum output current of 100mA and operates within an input voltage range of 14.5V to 27V. Key electrical parameters include a typical quiescent current of 2.1mA, line regulation of 20mV (14.5V ≤ VI ≤ 27V), and load regulation of 20mV (1mA ≤ IO ≤ 100mA). It features thermal overload protection and short circuit current limiting.

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

• Integrated thermal overload protection circuit for safe operation under high temperature conditions
• Built-in short circuit current limiting mechanism to protect against output faults
• Monolithic fixed voltage design suitable for applications requiring supply currents up to 100mA

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

• Power supply circuits requiring stable 12V regulation
• Battery-powered equipment needing efficient voltage step-down
• General-purpose electronic systems utilizing standard positive voltage rails

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

Verify that the component matches the KA78LXXA/KA78L05AA datasheet specifications, specifically the 12V output and 8-SOP package. Confirm the manufacturer origin as Fairchild Semiconductor or authorized successor entities like onsemi. Ensure the part number suffix 'ADTF' corresponds to the tape and reel packing format for the 8-SOP variant. Cross-reference the ordering information table to validate the specific tolerance and temperature rating associated with this designation.

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

Select this regulator when a fixed 12V output is required with moderate current demands up to 100mA. The 8-SOP surface-mount package is appropriate for compact PCB designs. Consider the dropout voltage characteristics and thermal dissipation requirements based on the input-output differential. This component is suitable for general consumer and industrial electronics where standard voltage regulation is needed without complex feedback networks.

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

This component belongs to the KA78LXXA/KA78L05AA family of three-terminal positive voltage regulators. The series offers various fixed output voltages including 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, and 24V. These monolithic integrated circuits are designed for simplicity and reliability in power management applications, providing essential protection features such as thermal shutdown and current limiting within a compact form factor.

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

Compatible substitutes include other 12V linear regulators from the same family, such as KA78L12AZTA (TO-92) or KA78L12AMTF (SOT-89). Verify pinout compatibility and package dimensions before substitution. Ensure the replacement part meets the same electrical specifications regarding output voltage tolerance, maximum current, and operating temperature range.