LX1555CM

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LX1555CM application field and working principle

LX1555CM is a highly integrated DC-DC switching controller, developed by Linear Technology Corporation and targeting the telecom, industrial, datacom and networking markets. It is a power-saving device ideal for voltage-conversion and stepping up or down applications. It combines the advantages of high performance and small package size. What makes this device suitable for a wide range of applications are its flexibility and smart design.

Application Field: LX1555CM finds a wide range of applications in telecom, industrial, datacom and networking markets. It can be used in a wide range of voltage-conversion and stepping up or down and power-saving applications. For example, it can be used as a step-down regulator in telecom systems such as SONET, cell phones, portable computers, as well as industrial automation purposes. In datacom applications, LX1555CM can be used for power sequencing or for power management with hot swapping capability. In networking applications, it can be used for automated power down and restart of equipment.

Working Principle: LX1555CM is a switching Buck regulator, which is made up of a high-side MOSFET switch and a low-side diode. It uses pulse-width modulation (PWM) to control the output voltage by controlling the duty cycle of the switching element. When the input voltage is higher than the output voltage, the MOSFET switch is turned on and off, to control the output voltage. It also features an adjustable current limit (OC) input to protect the device from output overloads. The device can operate at a wide range of frequencies. It has an adjustable peak current limit and an auto-restart feature for fault conditions. It also has an adjustable linear regulator enable switch and a voltage trim input for fine-tuning the output voltage.

LX1555CM is an efficient switching regulator providing greater than 90% efficiency. It is capable of delivering up to 5A of output current and has a wide input voltage range of 8V to 50V. It has under-voltage lockout (UVLO) and over-current protection (OC) features to prevent any kind of accidental or uncontrolled events. LX1555CM is available in a small TSSOP-16 package.

Overall, LX1555CM is a compact, versatile and reliable switching Buck regulator designed for power-saving applications. It is easy to use and provides high efficiency and superior performance. Due to its high efficiency, small size and multiple functionalities, the LX1555CM is ideal for a variety of DC-DC switching applications.

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