KA79L05AD

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

The KA79L05AD is a fixed negative voltage regulator from the KA79LXXA series, manufactured by Fairchild Semiconductor. It provides a nominal output voltage of -5V with ±5% tolerance and supports an output current up to 100mA. The device operates within an input voltage range of -30V to -20V for this specific voltage variant and features internal thermal overload protection and short-circuit current limiting. It is housed in an 8-SOP surface-mount package and functions across an operating temperature range of 0°C to +125°C.

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

• Integrated thermal overload protection shuts down the circuit during excessive power conditions
• Internal short-circuit current limiting protects against load faults
• Requires no external components for basic operation
• Fixed output voltage available in multiple standard negative values

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

• Negative rail generation for dual-supply electronic circuits
• Power supply filtering and regulation in low-current applications
• Biasing stages requiring stable negative voltage references

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

Verify that the component originates from Fairchild Semiconductor or authorized distributors, as the datasheet indicates copyright ownership. Confirm the 8-SOP package designation matches the physical footprint requirements. Ensure the ordering suffix 'AD' corresponds to the specified package type and verify RoHS compliance status through official documentation before procurement.

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

Select this regulator when a fixed -5V negative supply is required with minimal external circuitry. It is suitable for applications needing up to 100mA output current where space efficiency is prioritized via the 8-SOP package. Consider the dropout voltage characteristics and ensure the input voltage remains sufficiently above the output level to maintain regulation under all operating conditions.

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

This component belongs to the KA79LXXA series of 3-terminal negative voltage regulators. The series includes variants for various output voltages such as -8V, -12V, -15V, -18V, and -24V. These regulators are designed for general-purpose voltage regulation tasks, offering robust protection features and stable performance across a wide temperature range without requiring complex external compensation networks.

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

KA79L05AZ (TO-92 package)

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

What is the maximum input voltage for the KA79L05AD?

The absolute maximum input voltage rating for the KA79L05AD is -30V.

Does the KA79L05AD require external capacitors?

While often functional without them, it is recommended to bypass the input with a capacitor if connected via long wires or if the load capacitance is large, to ensure stability.

What protection features are included in the KA79L05AD?

The device includes internal thermal overload protection and internal short-circuit current limiting to prevent damage under fault conditions.