LTC4266CIUHF#PBF

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Power Management Integrated Circuits (PMICs) are integrated circuits (ICs) designed to facilitate power management and control the power usage, allocation, and efficiency of electronic systems. The LTC4266CIUHF#PBF is a PMIC device specifically designed to be used in applications requiring Power Over Ethernet (PoE). It is a single-chip power controller and a power sourcing equipment (PSE) controller that delivers up to 30 watts of power through a single Ethernet cable.

The LTC4266CIUHF#PBF integrates a number of features for PoE network devices, including a power sourcing equipment (PSE) controller, an IEEE 802.3-af/at PoE controller, and a fully compliant 10/100/1000 Base-T Ethernet Media Access Controller (MAC). It supports the idle and active power management states of the IEEE 802.3-af/at standard, including low power mode (LPM) and ultra low power mode (ULPM). The device also includes an on-board current sense circuit and thermal protection against excessive heat.

The LTC4266CIUHF#PBF incorporates an adaptive on-time switch mode supply voltage regulator that enables the power delivery more efficiently. This maximum power point tracking (MPPT) controller maintains a constant voltage level at the load, and it also has an auto-restart feature for fault conditions. The device also has an adjustable current limiting feature that ensures unreliable devices are not powered and allows safe disconnection from the power source without system shutdown.

The LTC4266CIUHF#PBF is designed with a comprehensive power management and protection system suitable for powering PoE networks. It has multiple programmable delay timers available for system startup and shutdown, as well as fault handling. It also provides a low power mode (LPM) and an ultra low power mode (ULPM) that can help to optimize energy consumption. Furthermore, the LTC4266CIUHF#PBF has detection, shutdown and reset features that defend against faults and misbehaving network devices.

The device is provided in a 16-pin, 4x4mm HSOP package and is rated for operation from -40°C to 85°C. The LTC4266CIUHF#PBF is an ideal choice for BT, industrial control, and PoE applications. Its advanced power flow control and protection system, coupled with good performance and flexibility, help to make it a cost effective solution for powering PoE networks.

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