LT3508HFE#PBF

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LT3508HFE#PBF is a high-efficiency, wide-input buck switching regulator. It is designed to support an input voltage range of 6 V to 42 V and up to 98% conversion efficiency. It has an integrated current sense amplifier that enables it to operate in either DCM or forced continuous mode of operation with extended duty cycle up to 90%.

Applications

LT3508HFE#PBF has a wide range of applications in the embedded and other industries. It can be used to provide regulated supply from a wide variety of power sources, making it suitable for high-performance embedded systems. It can be used as a power supply for microcontrollers, sensors, FPGAs and other small-scale power management solutions. It can also be used to transition from higher voltage rails such as a bench supply to lower voltage rails for powering circuitry.

Features

• Fixed frequency of 1.2MHz switching frequency
• Supports an input voltage range of 6 V to 42 V
• Up to 98% conversion efficiency
• Integrated current sense amplifier
• Operates in either DCM or forced continuous mode of operation
• Extended duty cycle up to 90%
• Output current up to 5 A
• Requires minimum number of external components

Working Principle

The LT3508HFE#PBF operates as a buck converter, where an inductor is used to store and release energy. The switch is connected across the input voltage, and is driven by a control circuit for a given frequency, thus converting the input voltage to a regulated output voltage. The switching action generates brief supply of high frequency current pulses. The current drawn from the input supply is rectified, filtered and regulated to obtain the required output voltage. The control circuit monitors the output voltage and determines the varying fire times to the switch. This regulation loop helps maintain the output voltage steady.

The LT3508HFE#PBF also features output over voltage protection, input under voltage lockout, and thermal shutdown features, making it a reliable solution for power supply applications.

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