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LT1912EMSE#TRPBF Application Field and Working Principle

Introduction: LT1912EMSE#TRPBF is a kind of DC/DC Switching Voltage Regulator from Linear Technology. It is a differential input high current buck regulator. The device can provide high efficiency and output voltage accuracy for a variety of applications including base station, routers, and wireless LAN systems.

Application Field:

LT1912EMSE#TRPBF voltage regulator is a differential input buck regulator with high accuracy, high efficiency, and high current capability. The device provides a wide range of output voltages and a configurable switching frequency. With its low input voltage, the device is suitable for applications such as base station, routers, and wireless LAN systems.

The main application areas of the LT1912EMSE#TRPBF are:

• Industrial systems and charging systems;
• Wireless communication systems;
• Battery management systems;
• Consumer electronics

Working Principle:

The LT1912EMSE#TRPBF is a high current buck regulator. It regulates the output voltage by switching a current through an inductor and monitoring the output with a voltage-sense resistor. The output voltage is set by the voltage sense resistor and the difference between the input and output voltages. Its wide range of output voltages allows for a variety of operating frequencies for different applications.

The regulator works as follows: The voltage at the input side is switched at a high frequency, typically in the range of 20 – 200 kHz, through an inductor. During the on-time, energy is stored in the inductor. The current stored in the inductor is then released from the output side where it is regulated by a voltage sense resistor. The voltage sense resistor ensures that the output voltage remains within the regulated limits. The current then returns through the inductor and is switched off in the input side.

The advantages of using the LT1912EMSE#TRPBF are the wide range of output voltages, the programmable switching frequency, and the up to 98% efficiency. Moreover, the device provides current-mode control which improves the efficiency and accuracy of the output voltage, as well as a POK (Power-On-Key) pin which allows for a delayed power-up of the regulator.

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