KD1084ADT25R

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The KD1084ADT25R is a Voltage Regulator from the Linear category of PMICs (Power Management ICs). This monolithic integrated circuit is a direct replacement for recently discontinued TL1084-25, and features improved performance in terms of heat dissipation, line and load regulation accuracy, and is equipped with additional features. Linear regulators are voltage-controlled rectangular wave generators which provide constant or adjustable level of output voltage while being able to reject “ripple” current. The KD1084ADT25R is designed to provide, in an easy to use package, output voltage adjustments with negative feedback and necessary protection functions including over-voltage, over-current and over-temperature. It also offers over-voltage and under-voltage safety shut down protection, current limiting, frequency compensation, and voltage reference compensation.

The KD1084ADT25R voltage regulator is designed and optimized for normal, low-power switching power supplies. It is ideal for use in electronic devices such as household electrical appliances, office equipment, gaming consoles, computers, audio and AV equipment and automotive systems. It is also suitable for motor control, interphone, etc. and microcontrollers requiring low noise and high accuracy.

The KD1084ADT25R features a low noise, low drop out voltage and low power dissipation compared to other regulators available on the market. It has a wide input voltage range of 4.5V to 25V, with output voltages ranging from 0.8V to 25V and an efficiency of up to 90%. It is also able to deliver up to 1.5 A of continuous output current, making it ideal for use with compact, low-power applications. The 12-pin Dual-In-Line package of the KD1084ADT25R prevents cracking of the package and provides a secure mounting option with assured electrical performance.

The KD1084ADT25R linear regulator is equipped with several protection and safety features, including over-voltage, over-current and over-temperature protection. Additionally, it has adjustable frequency and voltage reference compensation, and current limit control, designed to optimize circuit performance. The low dropout voltage of 0.2V reduces power dissipation and makes the regulator suitable for use with almost any input voltage and load.

The working principle of the KD1084ADT25R is relatively straightforward. The integrated linear regulator consists of an error amplifier, and a power transistor that is controlled by the output of the error amplifier. The error amplifier compares a reference voltage (usually 1.25V or 1.25V) to the actual output voltage and adjusts the power output from the transistor accordingly. The input voltage is regulated to a fixed value (for example, 4.5V or 25V), and the output voltage is controlled by the feedback. This incorporates a second amplifier with an adjustable gain, referred to as the voltage reference amplifier, which adjusts the reference voltage to maintain the feedback ratio.

The error amplifier compensates for changes in temperature, line and load regulation and has a maximum deviation of ±0.01%; ensuring very accurate voltage regulation. The output voltage is also equipped with low noise operation, designed to reject “ripple” in the system. The error amplifier is also designed to prevent over-current, providing protection to the system in the event of a short circuit. In the event of an over-current situation, the voltage regulator will be shut off and the fault will be reported.

The KD1084ADT25R linear voltage regulator is an ideal solution for low noise, low power and high accuracy voltage regulation. It provides a comprehensive range of protection features and performance enhancements, making it a reliable, robust and cost-effective choice for many applications.

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