LT3757AIMSE#PBF

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The LT3757AIMSE#PBF is a DC to DC switching controller from Linear Technology. This device is designed to produce output voltage from a wide range of input voltage. The LT3757AIMSE#PBF is ideal for automotive applications, in which there may not be a steady 12V supply. It contains integrated gate drivers to switch N-channel MOSFETs, along with the means for deriving the reference voltage for the output voltage.

Application Field

The LT3757AIMSE#PBF DC to DC switching controller has a number of uses in automotive applications. It is designed to work with a wide range of input voltages, as low as 4.5V and as high as 60V. This makes it particularly useful for automotive applications, where the input voltage can vary from car to car. It can also be used in any application where the input voltage may vary greatly, such as power converters in consumer electronics, battery-operated systems, laptop chargers, and solar/wind power systems.

The LT3757AIMSE#PBF’s high-side gate driver is designed to drive an N-channel MOSFET. This makes it ideal for automotive applications, as it allows the switching controller to be used with both load-switch circuits and synchronous buck converters. The LT3757AIMSE#PBF is also designed to be very efficient, with a total quiescent current of just 1.3μA. This low current draw means it will not significantly affect the efficiency of whatever system it is used in.

Working Principle

The LT3757AIMSE#PBF works by producing a reference voltage for the output voltage. It does this using an internal voltage reference and a 0.5%, 8-bit adjustable resistor divider. This gives it the accuracy and flexibility to be used in a wide range of applications.

The LT3757AIMSE#PBF also contains an integrated gate driver. This allows it to switch an N-channel MOSFET and produce the necessary voltage for the output voltage. The circuit requires just 6mA of gate drive current, minimizing the power consumption of the MOSFET.

The LT3757AIMSE#PBF also comes with protection features, including over-voltage protection and short circuit protection. Over-voltage protection ensures that the circuit is not damaged by sudden changes in input voltage, while short circuit protection keeps the system safe in the event of a short circuit. The LT3757AIMSE#PBF also has thermal shutdown and latchoff protection, which helps prevent the circuit from becoming too hot and shorting out.

Conclusion

The LT3757AIMSE#PBF from Linear Technology is a DC to DC switching controller designed for automotive applications. It has a wide range of input voltages, making it ideal for systems where the voltage can vary greatly, and it is very efficient, with a total quiescent current of just 1.3μA. The integrated gate driver allows it to switch an N-channel MOSFET, and it has a number of protection features, including over-voltage protection, short circuit protection, thermal shutdown and latchoff protection.

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