LT3972EDD#PBF

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT3972EDD#PBF is a buck controller for use in a wide range of DC-to-DC applications. It bridges the gap between the traditional linear regulator and a switching regulator with both providing fast transient response and excellent efficiency, low cost and low noise operation, while avoiding the complexities of conventional switching regulators.

Application Field

The LT3972EDD#PBF offers an ideal solution for applications requiring buck converter control in a wide range of applications, such as portable equipment, computers and cell phones. Its main application field includes technology such as EPON and RFoG, cellular base stations, battery-powered hand-held terminals, and automated meter reading systems.

Working Principle

The LT3972EDD#PBF uses a Pulse Width Modulated (PWM) control scheme to regulate the output voltage. This ensures that the input and output currents follow predictable patterns and that the output voltage remains true to the required regulation precision.

At the heart of the LT3972EDD#PBF is an internal voltage reference, which maintains a fixed voltage level with respect to a predetermined reference point. An external resistor divider is used to set the output voltage level and the changing input voltage level is monitored by the feedback network, causing the pulse width of the output PWM signal to be adjusted accordingly, thus maintaining the output voltage at the set level.

In addition to its voltage reference control, the LT3972EDD#PBF also offers a variety of protection features. Over voltage, over temperature and under voltage, as well as current limit protection, are all available in order to protect the device and the application circuit.

Conclusion

The LT3972EDD#PBF is a highly integrated, high performance buck controller that provides superior accuracy and fast transient response. With its excellent efficiency, low cost and low noise operation, the LT3972EDD#PBF delivers a high level of performance for a broad range of DC-to-DC applications.

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