LTC3621IDCB-5#TRPBF

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LTC3621IDCB-5#TRPBF is a high-quality, efficient DC/DC switching regulator and part of Texas Instruments’ portfolio of power management integrated circuits (PMIC). The device is a synchronous step-down controller, which means it takes an input voltage, steps it down, and outputs a lower voltage for applications such as USB power and high-power supplies. The LTC3621IDCB-5#TRPBF offers low-RDSON integrated high-side and low-side switches, current-mode operation and a choice of fixed or adjustable output voltages.

The LTC3621IDCB-5#TRPBF includes protection features such as overcurrent, overvoltage and overtemperature protection, as well as a programmable soft-start feature, which prevents inrush current and supports plug-and-play applications. It also offers 1.2mΩ RDSON CS and CL switches, allowing designers to achieve high efficiency over a wider range of load conditions. The LTC3621IDCB-5#TRPBF is housed in the 2x3mm DFN package, enabling easy integration in space-constrained applications.

The LTC3621IDCB-5#TRPBF is ideal for applications that require low-power, high-efficiency step-down voltage regulators such as USB PD systems, battery management in electric vehicles and high-power LED lighting. The device can operate at input voltages of up to 28V and can regulate output voltages down to 0.6V with an efficiency of up to 95%.

Application Field of LTC3621IDCB-5#TRPBF

The LTC3621IDCB-5#TRPBF is primarily designed for lighting, USB power delivery (PD), and battery management applications, which require a low-power and high-efficiency step-down voltage regulator. This device is ideal for applications where power efficiency, space constraints, and ease of implementation are key requirements.

In lighting applications, the DC/DC switching regulator can be used to regulate the output of a 12V or 24V DC input supply down to the voltage necessary to power multiple LEDs in parallel, while still maintaining high efficiency. The device’s wide input voltage range and output voltage range allows it to be used in applications where a range of input voltages and output voltages are needed.

The LTC3621IDCB-5#TRPBF can also be used in USB PD applications where its integrated protection and programmable soft-start feature can be valuable in preventing inrush current and exceeding voltage thresholds. This device is also used in battery management applications in electric vehicles or other battery-powered applications. It is useful for controlling the current flow from the battery to the load, allowing for optimization of power management in order to maximize battery life.

Working Principle of LTC3621IDCB-5#TRPBF

The LTC3621IDCB-5#TRPBF is designed for high-efficiency synchronous step-down conversion, where the output voltage is regulated by means of pulse-width modulation (PWM). The device operates on a constant on-time PWM control architecture with current-mode control. The voltage mode of operation allows for a very fast transient response, and the current-mode provides additional benefits such as increased accuracy, improved line and load response and protection against input overvoltages, making it ideal for use in battery management applications.

The LTC3621IDCB-5#TRPBF has an input voltage range of up to 28V, and can regulate output voltages down to 0.6V with an efficiency of up to 95%. The device includes integrated high-side and low-side 0.6mΩ switches, programmable soft-start and maximum duty cycle features, overcurrent, overvoltage, and overtemperature protection, and is available in a 2x3mm DFN package. The device also offers an adjustable frequency range and fixed or adjustable output voltage.

The LTC3621IDCB-5#TRPBF is easy to use and requires no external compensation components, enabling rapid design turn-around times and improved time to market. It can be used in a variety of different applications where high efficiency and low output voltage are crucial.

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