LT3680EMSE#PBF

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The LT3680EMSE#PBF is a high performance, synchronous step-down voltage regulator module that can produce an output voltage as low as 0.6V. The module operates with a supply voltage range of 4V to 18V, making it suitable for many applications. It is suitable for a wide variety of applications, including portable computing, battery powered systems, and automotive power systems. This article is an overview of the LT3680EMSE#PBF, its application field and working principle.

Application Field and Features

The LT3680EMSE#PBF is a versatile multi-output regulator with a wide range of features. It has a synchronous low-side P-channel MOSFET and high switching frequency of up to 500kHz, allowing for higher efficiency and reduced solution size. The device can operate in either buck or boost mode, with a wide output voltage range from 0.6V to 20V. The output currents can be set up to 3 A and it has a pulse-by-pulse current limit and an adjustable soft-start. The device also features a low quiescent current of only 8.8 μA in standby mode. In addition, the LT3680EMSE#PBF has an always-on LDO output with a maximum current of 200mA. This output can be used to support hot-plugging and prevent microcontroller reset.

The LT3680EMSE#PBF is designed to be used in a wide variety of applications including portable computing, battery powered systems, and automotive power systems. It is ideal for powering microprocessors, FPGAs, DSPs, memory, and other peripherals. Furthermore, the device is well-suited for automotive applications, such as in a 12V to 5V DC to DC converter or a secondary power supply for infotainment systems.

Working Principle

The LT3680EMSE#PBF operates on the principle of synchronous switching. It is a switch mode DC to DC converter that regulates an input voltage to a predetermined output voltage. The device operates in either buck or boost mode, depending on the relative voltages of the input and output. When operating in buck mode, the input voltage is lower than the output voltage, and the device behaves as a step-down regulator. When operating in boost mode, the input voltage is higher than the output voltage, and the device behaves as a step-up regulator.

The device has an integrated synchronous low-side P-channel MOSFET. The output voltage is regulated by adjusting the ratio of the on-time to the off-time of the MOSFET. This is accomplished by a control circuit, which senses the output voltage and modulates the on-time and off-time accordingly. The device can be set up with a wide range of switching frequencies, up to 500kHz, and a wide range of output voltages, from 0.6V to 20V.

The LT3680EMSE#PBF also features a low-quiescent current standby mode, in which it consumes only 8.8 μA. Moreover, the device has an always-on LDO output with a maximum current of 200mA. This output can be used to support hot-plugging, allowing the device to be connected or disconnected without the risk of microcontroller reset.

Conclusion

The LT3680EMSE#PBF is a versatile high performance synchronous step-down DC-DC converter from Linear Technology. It is suitable for a wide range of applications, including portable computing, battery powered systems, and automotive power systems. The device is capable of operating in either buck or boost mode with a wide output voltage range from 0.6V to 20V and a high switching frequency of up to 500kHz. It also has an integrated low quiescent current standby mode, as well as an always-on LDO output with a maximum current of 200mA. The LT3680EMSE#PBF is an ideal solution for powering microprocessors, FPGAs, DSPs, memory, and other peripherals.

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