FAN5037M

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The FAN5037M is a DC-DC switching controller from the Texas Instruments family of voltage regulators, and is commonly used in a variety of applications such as computing, mobile systems, automotive, and process/analog control systems. It features an adjustable transition frequency of up to 200kHz, and is optimised for minimum output voltage ripple and power supply design size. In this article, we will look at the FAN5037M’s application field and working principle.

Applications
The FAN5037M is designed to control a synchronous buck converter and provide good performance in a wide variety of applications, including

• Power management in computing, storage, and networking systems
• Voltage regulation and power supply design in mobile systems
• Power distribution and management in a wide range of automotive applications
• Industrial process control, including CNC or PLC systems
• Analog power control systems such as laser processing equipment
• Providing regulated output voltages for large LED display panels

The FAN5037M is designed to produce a highly efficient, low-noise output voltage that is scalable to match various system requirements. It is also designed to operate over a wide range of input voltage levels, and can be used in mains-powered applications as well as systems powered by a remote battery.

Working Principle
The FAN5037M operates as a synchronous buck converter, and it is designed to reduce AC input voltage to a regulated DC output voltage. Its on-chip circuitry provides a low dropout and high efficiency solution for producing an output voltage that is adjustable from 0.8V to 3.3V.

The output voltage of the FAN5037M is determined by the ratio of an external phase locked loop (PLL) resistor to the internal control voltage reference, and the output voltage can be adjusted in small increments to meet various system requirements.

At its core, the FAN5037M uses a fixed-frequency buck converter design, which ensures a low output voltage ripple and cost-effective power supply design. It has an adjustable transition frequency of up to 200kHz, which allows power supply designs to be tailored to the needs of the application.

The FAN5037M also has numerous other features that make it well-suited to a variety of applications. It is designed to regulate output voltage even when the input voltage changes, and has built-in protections against over currents, over temperatures, and short circuits. It is also designed to enter a low-power sleep mode when the input voltage reduces below 6.5V, ensuring minimal power consumption in standby mode.

In summary, the FAN5037M is a highly flexible DC-DC switching controller, and is well-suited to a wide range of applications in computing, mobile, automotive, process control, and analog power systems. Its adjustable transition frequency and wide range of protections makes it an ideal choice for a variety of power supply design requirements.

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