LT3663IDCB#TRPBF

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The LT3663IDCB#TRPBF is a step-down switching regulator that is part of a family of DC-DC converters from Linear Technology. This particular regulator is a high-efficiency step-down converter featuring a wide input voltage range from 2.5V to 36V, and can provide up to 3A of continuous output current. It contains an integrated high-side MOSFET, and its wide input voltage range makes it suitable for a variety of applications, such as automotive, personal electronics, and industrial use.

Application Field and Working Principle

The LT3663IDCB#TRPBF is ideally suited for a variety of applications, such as automotive, industrial, and personal electronics. It has a wide input voltage range that can accommodate the required 12V, 15V, 24V and 36V automotive power rails, as well as the low voltage ranges required by portable devices. Additionally, its high efficiency and low quiescent current makes it an ideal choice for any application that requires high power efficiency, such as in battery-powered portable electronics.

The LT3663IDCB#TRPBF uses a constant frequency, fixed-frequency, current-mode control architecture to accurately regulate and control the output voltage. It works by internally monitoring the output voltage and continuously adjusting the duty cycle of the switch accordingly. During the on-time, the switch is on, and the inductor current ramps up. When the switch is off, the inductor current discharges through the inductor and the output capacitor until it reduces the output voltage back to the programmed set point.

The LT3663IDCB#TRPBF can also operate in bypass mode, where the output voltage is regulated by the output capacitor and bypassed around the IC to provide a fixed output voltage. This is useful when the device is operating in power-saving mode, where it is desirable to limit the power consumption of a system by bypassing the IC to provide a fixed output voltage.

Features and Benefits

The LT3663IDCB#TRPBF features a number of features and benefits that make it an ideal choice for a wide variety of applications. The input range makes it suitable for 12V, 15V, 24V and 36V automotive rails, as well as personal electronics, and its high efficiency of up to 95% makes it ideal for battery powered systems. Additionally, it features over-temperature protection and over-current protection, as well as short-circuit protection.

The LT3663IDCB#TRPBF also features a low quiescent current of typically 12μA, making it an ideal choice for applications that require high power efficiency. Furthermore, the device can be programmed with an external resistor and capacitor to generate a fixed frequency, which allows for synchronizing with other circuits and creating a frequency-folded output voltage. The device is also internally compensated, allowing for easy and stable loop compensation.

Conclusion

The LT3663IDCB#TRPBF is a high-efficiency, wide input range step-down DC-DC switching regulator, making it ideal for a variety of applications, such as automotive, personal electronics, and industrial use. It features a high efficiency of up to 95%, over-temperature protection and over-current protection, and a low quiescent current of typically 12μA, making it an ideal choice for applications that require high power efficiency. Additionally, the device can be programmed with an external resistor and capacitor to generate a fixed frequency, allowing for synchronizing with other circuits as well as creating a frequency-folded output voltage.

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