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Application Field and Working Principle of LT3014BES5#TRMPBF

The LT3014BES5#TRMPBF, belonging to the PMIC (Power Management Integrated Circuit) – Linear Voltage Regulator category, is specifically designed for portable applications. It has the capability to operate in an ultra wide input voltage range of 2.7V to 60V and its low Iq operation reduces the operating power losses with a maximum dropout voltage of 0.7V at 500mA of load. The LT3014BES5#TRMPBF has an adjustable output voltage range of 0.6V to 57V and can deliver a maximum peak current of 2A for sufficient current supply. It has protection features like a thermal shutdown, current limiting and overvoltage protection for reliable operation.

In addition, the LT3014BES5#TRMPBF also has a very low part count. This requires the input voltage source, an output capacitor for stability and an optional sense resistor for current limiting as the only necessary components for complete system implementation. Furthermore, only a single external resistor is required to set the output voltage and the ground pin of the device is not required in the circuit. This makes it cost effective and ideal for a variety of applications.

Working Principle

The LT3014BES5#TRMPBF is an ultra low-noise, linear voltage regulator integrated circuit. It is designed to provide a constant low-noise output voltage across a wide input voltage range and is optimized for battery-powered portable applications. Internally, the device uses a voltage reference, a current sense amplifier, an inverting amplifier and an error amplifier and it is housed in a die-shrunk 8-pin package.

The device’s operating principle is based on the basic voltage regulator design and it has a fix voltage input. The current sense amplifier detects the current coming from the output devices and the inverting amplifier amplifies the output current to a compensated voltage. This compensated voltage is then compared with the voltage of the voltage reference using an error amplifier. The error amplifier generates a control voltage that commands the output device to achieve the desired output voltage.

The LT3014BES5#TRMPBF also includes various protection features which help in protecting the device from various external and internal conditions which can cause damage. There is an overcurrent limit circuit to detect excessive output current and a thermal shutdown circuit which is triggered at a junction temperature of 150°C. There is also an external voltage feedback loop which is designed to prevent the output voltage from exceeding a certain level. This helps in preventing device damage in case of an unexpected input voltage.

Conclusion

The LT3014BES5#TRMPBF is an excellent choice in terms of low-noise, linear voltage regulation applications. It is a cost-effective solution as it only requires a single external resistor for output voltage setting. It also has protection features like a thermal shutdown, current limit, and overvoltage protection for reliable operation. Furthermore, it has a wide input voltage range, low Iq operation, and is housed in a die-shrunk 8-pin package.

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