LT3782EFE#TRPBF

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Introduction

The LT3782EFE#TRPBF is a high efficiency, low noise, step-down switching voltage regulator with integrated power switch. It is manufactured from Linear Technology, a leading power management and analog IC company. The LT3782EFE#TRPBF is classified as a Power Management Integrated Circuit (PMIC) with Voltage Regulators and DC-DC Switching Controllers.

Applications

The LT3782EFE#TRPBF is specifically designed to provide high efficiency and low noise performance in a wide range of applications, such as handheld and portable battery-operated devices, power supplies, desktop computers, and notebook computers. In addition, it can be used to regulate the output voltage from the battery, enabling manufacturers to design the power supply around the power requiriments of the device, ensuring optimal performance. The LT3782EFE#TRPBF can also be used for small to medium-sized LED drivers, step-down converters, and flyback converters.

Features

The LT3782EFE#TRPBF packs a lot of features, such as a high switching frequency of up to 2.2MHz, high operating efficiency of up to 95%, programmable Soft-start, adjustable output voltage connected to the VIN pin, and adjustable switching frequency connected to the FSEL pin. The high efficiency provided by the LT3782EFE#TRPBF enables designers to build cost effective and power efficient solutions. Furthermore, the integrated power switch eliminates the need for an external MOSFET and diode.

Design Considerations

When designing a power supply using the LT3782EFE#TRPBF, careful consideration needs to be given to the output power, the inductor size, the output voltage and the ripple current. The output power should be chosen based on the application and the power requirements, and the output voltage must match the needs of the device. The ripple current should be reduced as much as possible, as it will affect the overall efficiency of the power supply. The inductor needs to be chosen carefully, as this will affect the performance of the power supply.

Working Principle

The LT3782EFE#TRPBF works on the basis of a “pulse width modulation” (PWM) technique. The integrated power switch is used to switch the input voltage applied to the power supply’s output voltage at a given frequency. This frequency is adjustable based on the FSEL pin voltage. In addition, the integrated power switch also helps to maintain the output voltage by sensing the output voltage level and regulating the PWM duty cycle.

The output voltage is determined by the voltage applied to the VIN pin, which can be adjusted to match the power requirements of the device. As the duty cycle of the power switch is regulated when the output voltage is below or above the desired value, the output voltage of the power supply is regulated to the desired level with minimal ripple and noise.

Conclusion

The LT3782EFE#TRPBF offers a convenient and power-efficient solution for high efficiency, low noise step-down switching voltage regulator applications. It packs a lot of features such as high switching frequency and adjustable frequencies, as well as low ripple current and adjustable output voltage. When correctly designed, the LT3782EFE#TRPBF provides reliable and cost-effective performance in a wide range of applications.

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