LT4320IN8-1#PBF

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Power management integrated circuit (PMIC), also called power management unit (PMU), is a specially designed power management chip that integrates multiple DC-DC converters, voltage regulators, voltage reference sources, and current-limiting drivers. These components, working together, provide stable, efficient, and consistent power distribution and management.

The LT4320IN8-1#PBF is an integrated circuit (IC) that belongs to the PMIC family. Designed by Linear Technology, the LT4320IN8-1#PBF is an OR (output rectifier) controller that also supports ideal diode functions. It is ideal for use in step-down and step-up applications in which extra high-side output rectification is required.

Application Field

The LT4320IN8-1#PBF can be employed in a variety of power management applications. It is designed for use in automotive, industrial, consumer, and personal electronics products. It can be used in applications such as embedded systems, peripheral devices, battery-operated products, and power converters.

The LT4320IN8-1#PBF can be used in systems where power dissipation needs to be minimized or where high side output rectification is required. It can also be used in systems where the load needs to be regulated, or where the control of interleaved point of load (POL) converters is needed.

Working Principle

The LT4320IN8-1#PBF functions as an OR (Output Rectifier) controller with built-in ideal diode functions. It has a low quiescent current and is designed to be used with a single power stage. It has two interleaved outputs (VOUT1 and VOUT2), each with independent control. The two outputs have different current sharing and can be operated at different output voltages.

The LT4320IN8-1#PBF features an active clamp mechanism that allows lower voltage drops across the rectifier element, which helps to reduce a system’s overall power dissipation. It also has a wide input voltage range, adjustable current sharing between the two outputs, and cycle skipping to minimize switching losses.

The LT4320IN8-1#PBF requires an external low side MOSFET and an external synchronous rectifier. The rectifier is used to provide reverse-current protection, and its size is selected according to the required VOUT voltage. The LT4320IN8-1#PBF also has an internal VIN UVLO (under voltage lockout) circuit and an internal 9V LDO regulator for VREFREF.

In summary, the LT4320IN8-1#PBF is a PMIC OR controller with built-in ideal diode functions. It is designed for use in automotive, industrial, consumer, and personal electronics applications, providing efficient and consistent power management in systems where power dissipation needs to be minimized, or where high side output rectification is required.

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