KA7912

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

The KA7912 is a three-terminal negative voltage regulator from the KA79XX series, manufactured by ON Semiconductor. It provides a fixed output voltage of -12 V with a maximum output current exceeding 1 A. The device operates within an input voltage range of -15.5 V to -27 V and supports junction temperatures up to +125 °C. Electrical characteristics include a typical quiescent current of 6 mA, ripple rejection of 60 dB at 120 Hz, and a dropout voltage of 2 V at 1 A load. The component features internal thermal overload protection, short-circuit current limiting, and safe operating area compensation.

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

• Integrated thermal shutdown and short-circuit protection circuits ensure device reliability under fault conditions.
• Internal safe operating area compensation allows for robust performance across varying load and temperature ranges.
• Fixed -12 V output eliminates external resistor networks for standard negative rail generation.

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

• Negative power supply rails in split-supply operational amplifier circuits
• General-purpose linear voltage regulation for electronic equipment
• Power management in systems requiring stable negative DC voltages

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

Verify the specific ordering suffix (e.g., TU or CT) against the official ON Semiconductor website to confirm package gauge and packing method. Ensure the part number reflects the correct tolerance variant, as KA7912TU denotes ±4% tolerance while KA7912ATU indicates ±2%. Confirm that the source is an authorized distributor to guarantee traceability and compliance with the manufacturer's anti-counterfeiting policies.

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

Select this component when a fixed -12 V negative rail is required with currents up to 1 A. Consider the thermal resistance values (RθJC of 5 °C/W) to determine appropriate heat sinking requirements for high-power dissipation scenarios. Verify that the input voltage remains within the specified limits to maintain regulation and prevent damage to the internal protection circuitry.

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

This device belongs to the KA79XX family of three-terminal negative regulators, which also includes variants such as KA7905, KA7915, and KA7918. The series shares common architectural features including TO-220 packaging options and identical protection mechanisms. The KA7912 specifically targets applications needing a -12 V output, serving as a counterpart to positive regulator families like the KA78xx series.

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

LM7912CT is documented as a compatible alternative within the same datasheet specification sheet.