LT3757EMSE#TRPBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LT3757EMSE#TRPBF is a high-precision synchronous buck regulator controller with a high level of integration. It is categorized under DC-DC switching controllers and is a type of voltage regulator under the PMIC (Power Management Integrated Circuits) umbrella. It combines all of the features needed to build a modern-day high-efficiency synchronous buck converter, including a 16-bit DAC for setting the output voltage, an oscillator for setting switching frequency, a pre-driver module, a high-side and a low-side gate driver, current-sensing circuits, and much more.

The 16-Bit DAC Feature

The LT3757EMSE#TRPBF offers an embedded 16-bit DAC for setting the output voltage. This feature eliminates the need for an external current-sensing circuit or external DACs. The DAC also allows the output voltage to be adjusted on-the-fly, eliminating the need to shut down the regulator when making changes.

The Pre-Driver Module

The controller includes a pre-driver module. This module provides fast, low-side and high-side driver outputs. The pre-driver module also helps reduce electromagnetic interference (EMI) and minimize the effects of external noise and voltage transients.

The Oscillator

Another integral part of the controller is the integrated phase-locked loop (PLL) oscillator. This oscillator sets the switching frequency of the buck converter. It also allows for quick, stable ramp-up of the output voltage and provides better dynamic response for load transients.

Current Sensing Circuits

The LT3757EMSE#TRPBF also provides a full suite of current sensing circuits. This feature makes it easier to monitor output current and provides the necessary greater protection against over-current conditions, eliminating the need for an external current-sensing circuit.

Additional Features

The LT3757EMSE#TRPBF includes additional features that make it suitable for a wide range of applications. It has an adjustable under-voltage lockout (UVLO) and adjustable soft-start/soft-stop ramp rates. It also includes a built-in power-good (PG) output, which indicates when the output voltage is within tolerance.

Applications

The features of the LT3757EMSE#TRPBF make it suitable for a range of applications, including DSPs, FPGAs, microprocessors and other high-speed logic chips. It can be used for high efficiency applications, such as board-mounted power supplies and battery chargers. The LT3757EMSE#TRPBF has also been used for LED lighting and industrial applications.

Working Principle

The LT3757EMSE#TRPBF works according to the buck converter principle. The controller generates an internal PWM signal using the oscillator and pre-driver module. The internal PWM signal is used to drive a pair of external power MOSFETs in a buck configuration. This creates a voltage reference which is compared to the output voltage set by the 16-bit DAC. The voltage reference is adjusted accordingly in order to keep the output voltage within the desired range.

The LT3757EMSE#TRPBF also features protection functions, such as over-temperature and over-current protection. The controller also has an adjustable soft-start/soft-stop and rise/fall time, which helps reduce inrush current and minimize output voltage ringing.

In summary, the LT3757EMSE#TRPBF is a high-precision synchronous buck converter controller with a high level of integration. It combines a full suite of features, such as a 16-bit DAC for setting the output voltage, an integrated PLL oscillator for setting switching frequency, a pre-driver module, and current sensing circuits. It is suitable for a range of applications, including DSPs, FPGAs, microprocessors and other high-speed logic chips, as well as board-mounted power supplies, battery chargers, LED lighting and industrial applications. The LT3757EMSE#TRPBF works according to the buck converter principle, adjusting the voltage reference in order to maintain the desired output voltage, while also providing protection against over-current and over-temperature conditions.

The specific data is subject to PDF, and the above content is for reference