LTC3527EUD#TRPBF

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LTC3527EUD#TRPBF is a highly efficient and low power synchronous DC/DC boost converter from Linear Technology. Apart from being a high-performance regulator, it also has onboard temperature shutdown and foldback protection. It is mainly used for battery-powered applications although further applications may also be developed. This article briefly discussed the application field and working principle of the LTC3527EUD#TRPBF.

Application Field

The LTC3527EUD#TRPBF is mainly used in battery-powered mobile and portable gadgets including cell phones, PDAs, handhelds, cordless phones, and other portable electronic devices with input voltages from 1.2V to 5.5V. It is also used for charge boost operations in computer processors due to its high efficiency. Additionally, the chip can support maximum output current of up to 1.4A and provides output voltages ranging from 2.8V to 5.5V through its high accuracy adjustable output voltage capability.

Working Principle

The basic working principle of the LTC3527EUD#TRPBF is based on the Boost Converter Concept. In this type of regulator, the input DC voltage is increased to a greater level to give the desired output voltage. This is possible when the input voltage is stepped up using the switching action of an inductor. When the inductor is switched off, the energy stored in the magnetic field of the inductor is released and the voltage is increased at the output.

The LTC3527EUD#TRPBF utilizes the concept of Pulse Width Modulation (PWM) to ensure higher efficiency. PWM allows the switching frequency of the inductor to be varied. This feature reduces the power dissipation and allows the regulator to function at higher frequencies. The switching frequency for the regulator can be set between 200 kHz and 500 kHz, according to the requirement.

The LTC3527EUD#TRPBF also has a built-in current limit feature where the output current is monitored by a voltage across a shunt resistor. The current limit circuit continuously adjusts the switching frequency of the inductor, so that the output current is kept below the programmed limit.

The LTC3527EUD#TRPBF also has a sleep mode facility which helps reduce the overall power consumption. This mode is useful when the system is in an idle state or during power-cut situations, since it can reduce the current consumption to a level as low as 1mA. This feature helps to enhance the power management of devices and can prolong battery life.

In addition, the LTC3527EUD#TRPBF also has several protection features such as temperature shutdown and foldback protection. This helps protect the regulator against any sudden short circuits or high temperatures, which might otherwise damage the device.

Conclusion

The LTC3527EUD#TRPBF is a highly efficient and low power synchronous DC/DC boost converter with an onboard temperature shutdown and foldback protection. It has applications in battery-powered mobile and portable gadgets. Its basic working principle is based on the Boost Converter Concept and it uses the concept of PWM to ensure higher efficiency. It also has a built-in current limit feature, a sleep mode facility and several protection features making it an ideal choice for various power management solutions.

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