LT3758AEDD#TRPBF

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The LT3758AEDD#TRPBF is an adjustable high efficiency synchronous step-down switching regulator, which is a type of DC to DC switching controller. It is designed to deliver power from a 4-18 V input to one or two regulated output voltages. The device features low RDS(ON) internal power switches and two independent output voltage feedbacks for accurate and efficient power supply. It features a current mode architecture for superior noise immunity, line and load transient response, and fast response to dynamic loads.

The LT3758AEDD#TRPBF can support up to 5A continuous output current with very low quiescent current (typically 120uA). The device also supports Pulse-Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes of operation with adaptive on-time modulation and can switch in either continuous or discontinuous mode with auto-peak current reduction.

The LT3758AEDD#TRPBF comes in a compact 5x5mm QFN package, making it suitable for many portable and highly integrated applications such as mobile handsets, notebook and tablet PCs, and other battery-powered products. It is pin compatible with the MAX8839/MAX8841 and the LTC3217/LTC3218, reducing board space and eliminating the need for external components.

The LT3758AEDD#TRPBF is easy to use and highly configurable. It features adjustable external soft-start, adjustable switching frequency up to 1MHz, current-limited soft-stop, supply tracking and power good output status indicator. It also features an enable pin and thermal shutdown protection.

The LT3758AEDD#TRPBF features high efficiency up to 97% with low output ripple and low EMIs. It has an input to output differential drop-out voltage of only 300mV which makes the LT3758AEDD#TRPBF highly suitable for battery operated systems and automotive applications.

The LT3758AEDD#TRPBF can be used in a variety of applications, including but not limited to: portable electronics, lighting, motor control, industrial equipment, telecommunication, consumer products and automotive electronics. It is ideal for distributed power systems, power busses, local power-supplies, daughter cards and other distributed power systems.

The LT3758AEDD#TRPBF has a working principle based on buck voltage regulator. The integrated MOSFET switch is driven by a feedback loop consisting of a voltage error amplifier, a PWM provided by oscillator, ON/OFF comparator and current sense amplifier. This feedback loop will regulate the voltage of the output and keep it stable. The ON/OFF comparator compares the reference voltage with the input voltage and when the input voltage exceeds the reference voltage, the switch will turn on the power MOSFET and the current through the inductor will start to flow. This current will increase until the voltage across the inductor reaches the set reference voltage, and the MOSFET starts to turn off. In this way, the output voltage is regulated.

Overall, the LT3758AEDD#TRPBF is a high efficiency, high current, low quiescent current, low differential drop-out voltage, and low EMIs DC to DC switching controller. It is suitable for many applications and can be used to create efficient, reliable and stable power distributions for distributed power systems, power busses, local power-supplies and other distributed power systems. Its current mode architecture, adjustable switching frequency and adaptive on-time modulation allows for easy configuration and fast response to dynamic loads.

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