LT3508IFE#PBF

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LT3508IFE#PBF is a synchronous step-down DC/DC switching regulator with internal high-side and synchronous MOSFETs; it provides 3.2A peak current at a fixed 5V/6V/8V/10V/12V output. With a wide input voltage range of 4.8V to 28V, it is suitable for industrial and automotive applications. The current mode architecture provides fast transient response, which allows the device to maintain a stable output load even during the load step or power on/off transient. The 500kHz switching frequency makes it possible to use low cost, small size components.

The LT3508IFE#PBF is designed to provide adjustable output voltage capability, with independent feedback network to the two regulated outputs. The regulated outputs can be adjusted from 0.6V to 28V with a simple resistor divider, making it suitable for different applications.

As for its application field, LT3508IFE#PBF is especially suitable for industrial, automotive and communication applications. For industrial applications, its can provide adjustable power supplies for motor and control systems. For automotive applications, it can be used for low voltage applications like engine control, navigation systems, etc. even in harsh working environments. For communication applications, its flexibility and wide input voltage range meet the requirements of different transceivers and radios.

The working principle of LT3508IFE#PBF is similar with other types of DC/DC switching regulators. Its main building blocks include Error Amplifier, Oscillator and Current Sensing Circuit. The Error Amplifier compares the output voltage with an internal reference voltage, and generates an output signal to control the switching of the synchronous MOSFETs. Depending on the signal generated by the Error Amplifier, the Oscillator changes the gate voltage of the MOSFETs which in turn controls the switching frequency and the current flow through the output inductor. The Current Sensing Circuit will monitor the output current, and the signal is inputted to a current-mode loop control for current-limit protection.

In conclusion, LT3508IFE#PBF is a synchronous step-down DC/DC switching regulator with adjustable output voltage, which is especially suitable for industrial, automotive and communication applications. Its working principle is similar with other types of DC/DC switching regulators, including Error Amplifier, Oscillator and Current Sensing Circuit.

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