LTC7862IUFD#PBF

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The LTC7862IUFD#PBF is a feature-rich, pulse width modulated (PWM) synchronous buck controller ideal for synchronous, step-down, mesa-topology switching regulators. Designed for telecom and networking applications, the LTC7862IUFD#PBF is available in the 8-lead SOIC and DFN package options and provides optimal efficiency across a range of output voltages, while minimizing output noise. Supporting up to 3 A peak output current, the LTC7862IUFD#PBF is ideal for powering FPGA, SoC and microcontroller applications.

The LTC7862IUFD#PBF has integrated overvoltage, overcurrent and thermal protection to ensure reliable operation, and soft start to minimize output voltage overshoot. The device also offers a wide input voltage range of 4 V to 32 V and is pin compatible, feature programmable with the LTC7860, increasing design flexibility and making it an ideal choice for multiple output designs. The device supports output voltage settings as low as 0.59 V and accepts an external current sense resistor to establish the desired current limit.

The LTC7862IUFD#PBF includes a slew rate limited, on-chip control oscillator, featuring frequency skip mode, which helps reduce output ripple and EMI and improves efficiency at light loads. The device can also be synchronized with an external clock (up to 500 kHz) to allow Ultra-Low EMI design. Additionally, the optional power good indicator output is compatible with the LTC7860.

The LTC7862IUFD#PBF benefits from the lower quiescent current and low cost associated with synchronous buck technology and provides a simple solution for high performance, cost-effective voltage conversion in a wide range of applications. Its integrated features, low cost and typical efficiency of 95% make the LTC7862IUFD#PBF an ideal power conversion solution for high current telecommunication, networking, and computing applications.

The working principle of the LTC7862IUFD#PBF is based on a pulse-width modulation (PWM) control scheme. This type of control regulates the output voltage of the regulator by switching the power supply on and off at a rapid rate. A control circuit senses the output voltage and adjusts the width of the pulses accordingly, increasing or decreasing the average amount of power delivered to the output. As the output voltage rises, the pulse width is decreased; as the output voltage falls, the pulse width is increased. The resulting pulse-width modulated PWM signal is used to drive a power switching device such as an N-channel MOSFET. This allows the device to step down a higher voltage to a much lower voltage with excellent efficiency. Additionally, the current limit circuitry monitors the load current and reduces the pulse width accordingly to avoid overload conditions.

The LTC7862IUFD#PBF is well-suited for use in a wide range of DC/DC switching controller applications, including mobile communications, computers, and industrial equipment. With its wide input voltage range, integrated overvoltage and overcurrent protection, and fast transient response, the LTC7862IUFD#PBF is a cost-effective solution for moderate to high current applications. The device is rated for up to 3 A peak output current and ensures reliable power delivery while providing optimal efficiency and minimal output noise.

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