NUD3105LT1 Integrated Circuits (ICs)

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NUD3105LT1 Application Field and Working Principle

NUD3105LT1 is a Power Management IC (PMIC) from ON Semiconductor, which includes Power Distribution Switches, Load Drivers and other associated circuits. This multi-purpose IC provides multiple protection levels and provides a non-isolated, low-variance, isolated-feedback power supply design

PMICs categorize and simplify the power management of devices and systems. The NUD3105LT1 is a power distribution switch with a wide variety of features designed to provide reliability and dynamic power management especially suitable for portable devices.

Application Field and Features:

• Portable wireless devices
• RF transceivers
• Bluetooth/Wi-Fi devices
• High-speed processor applications
• Automotive/Industrial Ethernet
• Multi-channel WLAN

The IC is designed with associated circuit protection, temperature sensing and sensing, providing low-noise, low-quiescent power supply design, and other features such as:

• High ESD protection up to 4 kV
• Wide input voltage range from 3.3V to 28V
• Reverse-polarity protection
• Over-voltage protection
• Over-temperature protection
• Output current limitation
• Voltage monitoring
• Active OR-ing

Working Principle:

The NUD3105LT1 provides a power distribution system with a non-isolated, low-variance, isolated-feedback power supply design. The output voltage range can be adjusted using an external resistor divider circuit and monitored using an SMBUS. The main control IC monitors the system since it has high voltage monitoring functions, and provides protection features such as over-voltage protection, reverse-polarity protection and over-temperature protection.

The NUD3105LT1 provides active-ORing function, which controls the power flow in the device and system combining two or more power supplies. With this active-ORing system, when the input voltage is above a certain threshold the power is routed automatically to the system.

The IC also has a built-in temperature monitor that detects the junction temperature. This feature allows the system to shut down in case of an over-temperature situation and enables it to protect the IC from extreme temperatures. This makes the IC suitable for high temperature environments such as automotive applications.

The NUD3105LT1 provides a protection level of up to 4 kV for ESD and against the surge voltage. It is also compliant with automotive standards, ensuring guaranteed performance and reliability in extreme conditions.

Conclusion:

The NUD3105LT1 from ON Semiconductor is a multi-purpose PMIC which provides both power distribution switches and load drivers. The IC is designed to provide improved power management and optimized power conversions, as well as protection functions such as reverse-polarity protection and over-voltage protection. Its built-in temperature monitor and ESD protection features make it suitable for high temperature applications, like automotive systems. With its many features, the NUD3105LT1 is a powerful tool that device and system designers can use for their power management needs.

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