KA79M12RTM

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

The KA79M12RTM is a fixed negative linear voltage regulator from the KA79M series, manufactured by onsemi (formerly Fairchild Semiconductor). It provides a stable -12 V output with a maximum continuous current of 500 mA. The device features internal current limiting and thermal shutdown protection for robust operation. It operates within an ambient temperature range of 0°C to +125°C. Key electrical parameters include a line regulation of 80 mV and load regulation of 240 mV. Typical power supply rejection ratio (PSRR) is 60 dB. The component is housed in a TO-252 package and is available in Reel, Cut Tape, and MouseReel packaging formats.

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

• Fixed negative voltage regulation at -12 V
• Integrated thermal overload and short-circuit protection
• High power supply rejection ratio for noise reduction

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

• Negative rail generation in dual-supply electronic circuits
• Power management for analog signal processing systems
• Biasing requirements for operational amplifiers and sensors

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

Verify manufacturer designation as onsemi due to corporate acquisition history. Confirm RoHS compliance status via official documentation. Check end-of-life status as the part may be discontinued. Ensure package type matches TO-252 SMD requirements. Validate input voltage limits against specific application constraints before integration.

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

Select this component when a fixed -12 V negative supply is required with moderate current demands up to 500 mA. Consider the TO-252 surface-mount package for PCB space efficiency compared to through-hole alternatives. Evaluate thermal dissipation capabilities based on input-output voltage differential and ambient operating conditions. Compare PSRR specifications if low-noise performance is critical for sensitive analog loads.

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

The KA79M12RTM belongs to the KA79M family of three-terminal negative voltage regulators. This series is designed for general-purpose power supply applications requiring reliable negative voltage rails. The 'M' suffix typically denotes a 500 mA current capability variant, distinguishing it from higher-current 1A versions like the KA79XX series. The RTM suffix indicates reel-based tape and reel packaging for automated assembly processes.

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

MC79M12BDTRKG is a confirmed substitute part number from onsemi.