LT3686EDD#TRPBF

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LT3686EDD#TRPBF is a DC to DC switching regulator from the family of PMICs-Voltage Regulators-DC DC Switching Regulators . It allows the user to produce regulated output within a wide voltage and current range. Also, it offers high efficiency, low-ripple, fast transient response, and thermal and short-circuit protection.

To understand the application field and working principle of the LT3686EDD#TRPBF, it is important to analyze the device. The switch-mode regulator incorporates a fixed frequency, Current-Mode architecture. It is a dual synchronous Buck Regulator with a 2 A source/synchronous switch and a 1.5 A sink/synchronous switch. It comes with an integrated 55V, 2A High-Side Switch and can work in both current-mode and voltage-mode control.

The LT3686EDD#TRPBF can be used for applications such as DC-DC converting, as well as voltage and current regulation. It is majorly used in digital circuits and microprocessor sub-systems in which DC-DC regulation plays a major role. It is also used for battery-backed systems, point-of-load (POL) converter for FPGAs, and many other digital circuits.

The working principle is based on the operation of its control loop and output devices. The control loop regulates the current and voltage at the output depending on the input voltage and selected output voltage or current setting. It works using a concept of Peak-Current-Mode control methods. Its feedback loop consists of an error amplifier, a voltage reference, and a current-sense amplifier. The current mode of operation is achieved where the feedback loop regulates the output based on the peak inductor current. The regulator senses the instantaneous inductor current and applies the necessary power switches to maintain the peak current below a certain level.

The LT3686EDD#TRPBF also offers a host of features such as pre-biased startup, chopper control, and soft-start. As its control logic uses a single sense resistor, its efficiency is further enhanced. Moreover, the bus voltage tracking ensures that the output voltage is always within the acceptable range, thereby ensuring reliability.

In summary, the LT3686EDD#TRPBF from the family of PMICs-Voltage Regulators-DC DC Switching Regulators, is a dedicated dual synchronous Buck Regulator with an integrated 55V, 2A high-side switch. It offers high efficiency, low-ripple, fast transient response, and thermal and short-circuit protection. It can be used in digital circuits and microprocessor sub-systems, battery-backed systems, point-of-load (POL) converter for FPGAs, and many other digital circuits. Through its Peak-Current-Mode control and sensing of the peak inductor current, it is able to regulate the output voltage and current. Additionally, it offers features such as pre-biased startup, chopper control, and soft-start that further enhance its performance.

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