LT3487EDD#PBF

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The LT3487EDD#PBF is a high efficiency, wide input range (2.2V to 36V) synchronous step-down switching regulator that has a 2.8V to 24V adjustable output voltage. It includes two-phase interleaved architecture with each channel configured to have 0.7A to 3.5A of output current. This makes LT3487EDD#PBF suitable for various applications that require higher current, such as point-of-load (POL) regulators, power supplies and computing power bricks. With its constant on-time control scheme and single resistor as feedback, this device provides excellent transient response and eliminates the need for loop compensation circuitry. Additionally, the device also has multiple safety features such as overcurrent protection, output overvoltage protection, undervoltage lockout and thermal shutdown.

This device belongs to the category of PMIC - Voltage Regulators - DC DC Switching Regulators. PMIC (power management IC) is an integrated circuit that is designed for regulating and managing the power of electronic components. A voltage regulator is an electrical circuit that is designed to keep and maintain an output voltage at a predetermined value for a given input voltage, current, and temperature. DC to DC switching regulators are used to convert an unregulated input voltage to a regulated output voltage at a steady state. A typical application ofLT3487EDD#PBF is in distributed power systems. It uses four current-mode fixed-frequency synchronous step-down switching regulators that can be used in a 2-phase interleaved configuration to achieve higher power output while maintaining small overall solution size. The output voltage of each channel can be adjusted independently with a single external resistor at VOUT. To maximize efficiency, the LT3487EDD#PBF operates in constant on-time mode, which means that its oscillator frequency and on-time is kept constant while the load current varies. Furthermore, the synchronous rectification buck switchers help reduce power dissipation over a wide range of load currents.

The LT3487EDD#PBF is designed for low output voltage to current conversion which results in high efficiency and low quiescent current. It has an 800kHz fixed frequency with adjustable slope compensation that is essential for stability in a wide load and temperature range. Internal compensation of the device is optimized for the best response over a wide range of load currents. It comes with internal soft-start, over-current, voltage and thermal protection to prevent damage to the load and the device.

The LT3487EDD#PBF also has a built-in power-good signal that is monitored for power supply sequencing or sequencing of several supplies on the same board. The device also has an enable input that can be used to reduce power consumption when the output is not needed. On-board trimming capability allows a fast and accurate setup of the output voltage range. The device is housed in the 8-lead twisted-pair (2mm2) MSOP package.

The LT3487EDD#PBF is a highly efficient and safe DC-DC switching regulator. Its advanced features provide high system performance, improved transient response, and extended load management for a variety of power system applications. It has wide input voltage range, high efficiency, adjustable output voltage, excellent transient response and built-in protection features. Its current mode control architecture and constant on-time control scheme provides precise current and stable output. The device also has an integrated power-good signal and enable input. Its wide input voltage range, high efficiency, and adjustable output voltage make it a suitable choice for point-of-load (POL) and power supply applications.

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