LT3581HDE#TRPBF

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The LT3581HDE#TRPBF is a switching regulator that can provide up to 25A of continuous output current while requiring a minimum of 25V input voltage. It is the ideal device for use in applications such as telecommunication systems and automotive electronics, to name a few. The LT3581HDE#TRPBF switching regulator operates in step-down, step-up and inverting voltage modes for streamlined designs, ideal for battery-operated or solar-powered applications where output voltages are constantly changing. The LT3581HDE#TRPBF can also effectively regulate current, delivering highly accurate currents without sacrificing efficiency.

Application Field

The LT3581HDE#TRPBF is suitable for a wide range of applications such as automotive electronics, industrial motor control, battery charging, lighting, and many other power management systems. Its wide supply range (6-30 V), low quiescent current (2 mA) and high efficiency (up to 90%) make it very suitable for portable and hand-held low voltage applications where power saving is crucial.

The LT3581HDE#TRPBF is also capable of driving heavy loads and transient-heavy loads, with fast response to changing loads. Its high frequency operation (up to 2 MHz) also prevents acoustic noise that is usually associated with other types of regulators. It also encompasses a power-good output and input enable pin for additional control.

Working Principle

The LT3581HDE#TRPBF incorporates a switching topology known as synchronous rectification. This technology reduces conduction losses, providing higher efficiency as compared to other traditional regulators. It works by utilizing both a high-side and low-side N-channel MOSFET in a buck converter configuration that switches in synchrony with each other to regulate the output voltage. As energy is transferred from the input to the output, the high-side switch is turned on while the low-side switch is turned off, and vice versa.

The LT3581HDE#TRPBF utilizes a slope-compensation voltage-mode control system to guarantee stable operation over the full load range. This improved control system further reduces losses during output current transitions to guarantee accurate current readings, and reduces output voltage deviation. The current sense amplifier also allows the chip to sense current allowing load reactivation.

The LT3581HDE#TRPBF also has additional features such as programmable soft-start for eliminating inrush current during startup, programmable output current limit and over-temperature protection for safe system operation. The built-in synchronous rectification allows the chip to achieve higher efficiency and reduce component count.

In conclusion, the LT3581HDE#TRPBF requires minimal external components and can provide up to 25A of continuous output current. Its advanced features and high efficiency make it suitable for a wide range of applications such as automotive electronics, industrial motor control and power management systems.

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