LT3685EMSE#TRPBF

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LT3685EMSE#TRPBF is a highly efficient DC/DC synchronous step-down switching regulator, which is an advanced power management integrated circuit (PMIC). The device is designed to adjust the output voltage through pulse width modulation (PWM) control. In addition, it can be used in different application environments to provide 3A continuous current, and has a wide range of adjustable output voltage range from 0.6V to 5V. This article will introduce the application field and working principle of LT3685EMSE#TRPBF.

Application field of LT3685EMSE#TRPBF

The LT3685EMSE#TRPBF is mainly used in mobile electronic products, such as smartphones, tablets, digital cameras, and wearable devices. Its upgraded features such as high power efficiency and low power consumption effectively reduce the power consumption and cost for product design. In addition, its extraordinary feature allows a maximum efficiency of 97.5%, which supplies sufficient power especially to devices with low power consumption environment. Moreover, it has a wide output voltage range, providing 3A continuous current supply to meet multiple design requirements. Furthermore, its good heat dissipation performance facilitates the design of the heat dissipation system.

Moreover, the LT3685EMSE#TRPBF can also be used in other electronic products, such as smart controllers, medical devices, etc. Its high efficiency, low power consumption, wide output voltage range and good heat dissipation performance are advantageous for many applications.

Working principle of LT3685EMSE#TRPBF

The LT3685EMSE#TRPBF to generate a fixed voltage is accomplished by Pulse Width Modulation (PWM) control. The circuit consists of an internal error amplifier, a fixed reference voltage source, an internal tracking switch and a high-side and low-side power MOSFET. The fixed reference voltage is compared to an external voltage using an internal error amplifier, and the difference is used to control the MOSFETs to convert the input voltage to a fixed output voltage.

The error amplifier applies its output to the tracking switch which minimizes both input and output voltages to follow each other. When the tracking switch is open, the error amplifier output is fed to the MOSFET gate driver to control the ON time and the OFF time of each cycle. The operation of the MOSFET pairs is alternated by the PWM controller; for example the low side MOSFET is turned on, and then the high side MOSFET is turned off. Therefore, the PWM controller controls the duty cycle and frequency of the switching to maintain a preset output voltage. The series connection of two sets of MOSFETs makes it possible to achieve higher current driving capability.

In addition, the LT3685EMSE#TRPBF can be used in parallel connection to increase the output current. Parallel connection reduces the total output resistance, allowing lower voltage drops at the same output current and further improved efficiency. In addition, the device is able to share the load current among all of the parallel connected parts to reduce the temperature rise. Therefore, parallel connection allows the LT3685EMSE#TRPBF to achieve higher efficiency and lower power compared with single connection.

Conclusion

The LT3685EMSE#TRPBF is a highly efficient DC/DC synchronous step-down switching regulator. Its advanced power management features, such as high power efficiency, low power consumption, wide output voltage range and good heat dissipation performance, make it ideal for use in a variety of applications. The device can also be used in parallel connection to increase the output current and reduce the total output resistance.

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