3-Terminal 1 A Negative Voltage Regulators – KA79XX, KAZ9XXA, LM79XX Series

Category: Electronics, Fairchild Semiconductor, Regulators

Overview

The series of KA79XX, KAZ9XXA, and LM79XX are a family of 3-terminal negative voltage regulators provided by Fairchild Semiconductor. They are designed to supply more than 1 A of output current and offered in several fixed output voltage variants such as -5 V, -6 V, -8 V, -9 V, -12 V, -15 V, -18 V, and -24 V. Notably used for a diverse array of applications, their convenience is accented by the inclusion of a TO-220 package type.

Key Features

Current and Thermal Management: The devices incorporate internal current limiting and thermal shutdown mechanisms. These safeguards ensure that the regulators avoid damage from overheating and overcurrent conditions. The thermal overload protection is intrinsic, thus providing a level of reliability and safety.

Short-Circuit Protection: To further enhance their robustness, these regulators are also equipped with short-circuit protection. This ensures that the device and the larger system are defended against potential harm caused by circuit faults.

Output Transistor Safe Operating Area (SOA) Compensation: This feature helps maintain the regulator’s integrity and performance by protecting against extreme operating conditions that could otherwise exceed the safe operating parameters of the output transistors.

Packaging and Ordering Information

The regulators come in the TO-220 package version which can be recognized by its practical form factor suitable for several applications. Specifically designed for accommodating the thermal characteristics and for easy mounting onto heatsinks, the TO-220 package is reliable and durable.

Ordering is streamlined by giving each regulator variant a distinct product number aligned with its output voltage. The package type and output voltage are designated in the part number for streamlined identification and procurement.

Customers can order these components using specific product numbers such as KAZ10STU, KAZ906TU, LM7905CT, etc., each specifying the output voltage. Packing options include Rail or To-220 versions, and there’s a selection between Dual Gauge and Single Gauge for certain product numbers. These devices are designed to operate efficiently within a temperature range of 0 to +125°C and an output voltage accuracy tolerance of ±2% or ±4%.

Applications

With their ability to deliver steady negative voltage and safeguard against overcurrent and overheating conditions, these voltage regulators are ideal for power supplies requiring reliability and safety across multiple electronic applications.