LDK320M18R

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The LDK320M18R voltage regulator belongs to a range of Linear PMIC regulators that provide highly efficient power solutions in a wide variety of low-voltage applications. LDK320M18R is an SOT-223 package device that offers both variable and fixed voltage output, with a maximum output current of 3 A. It features a shut-down input that is connected to one of the output pins allowing for the voltage output to be briefly disabled. Due to its low quiescent current and high efficiency it can be used in battery-powered devices or on multi-voltage systems.

The LDK320M18R is available in different configurations and voltages depending on the specific application. It can provide a fixed voltage between 2.5V and 18V or a adjustable voltage between 2.425V and 17.1V. The maximum output current can be between 0.5 A and 3 A. The typical efficiency rating is 83%, and the device can operate at temperatures between -40 to +125°C.

The LDK320M18R\'s power solution consists of a three terminal adjustable or fixed voltage regulator with internal current limiting, thermal overload protection and short circuit protection. It also has an inhibit pin that, when pulled low, shuts down the output and reduces the input current to a very low level. This reduces the overall system power consumption significantly.

The operating principle of the LDK320M18R is similar to other LDK3xM18R series voltage regulators. It uses a shunt-type error amplifier together with an internal reference voltage to provide a regulated output voltage. The current-limiting circuitry consists of a series pass transistor, a sense resistor and an operational amplifier. When the output current surpasses the trip point of the current-limiting circuit, the voltage on the voltage output tab increases, causing the error amplifier to saturate and limit the output current.

The LDK320M18R has several applications, such as: handheld devices, computer peripherals, portable audio players, and automated industrial systems. It can be used in battery-powered systems, as well as in systems with fixed- and adjustable-voltage outputs. In systems with different supply rails, the LDK320M18R can provide power rail cleaning and filtering, as well as overvoltage protection.

Overall, the LDK320M18R is an ideal power solution for industrial systems that require a highly efficient voltage regulator with adjustable or fixed voltage settings. Its low voltage operation and internal current-limiting circuitry make it an ideal choice for applications with high current demands. With its wide range of output current and an adjustable output voltage, the LDK320M18R can be used in a variety of low voltage applications. The LDK320M18R is an excellent choice for power supply solutions that require a highly efficient, customizable and reliable voltage regulator.

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