LTC3118EUFD#PBF

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LTC3118EUFD#PBF is a high efficiency synchronous buck-boost DC/DC converter in a 4mm x 4mm QFN package that operates with input voltages between 2.7V and 60V and supports output voltages up to 20V. The device is highly integrated, utilizing internal current-mode control and the buck, boost and buck-boost operating modes to automatically deliver the best efficiency from minimum inputs up to the maximum. It features up to 98% efficiency in a high switching frequency (as high as 1.2MHz), allowing for a small solution size and faster load transients.

Applications for the LTC3118EUFD#PBF include automotive, consumer and industrial systems including battery-powered equipment, portable and remote devices, photovoltaic or thermal energy harvesting, and backup supplies for automotive and microcontrollers. It is suitable for many other point-of-load (POL) applications such as LED drivers, Bluetooth antennas, piezo actuators, small-signal amplifiers, micro-hydro turbines, solar pumps and LEDs.

Working Principle

The LTC3118EUFD#PBF device is based on a synchronous buck-boost topology with a continuous input voltage range of 2.7V to 60V and maximum output voltage of 20V suitable for many point-of-load (POL) applications. It allows for step-down, step-up and voltage-inversion operation, automatically selecting the best operating mode while providing very low output voltage ripple and high conversion efficiency.

The LTC3118EUFD#PBF outputs a fixed voltage that is accurately regulated to 0.6%. By using an internal current-mode control scheme with an internal low drop-out regulator, the device allows for better phase margin and faster transient response. Furthermore, the device is protected against overvoltage, overcurrent, undervoltage and thermal shutdown. It also features a low standby current when enabled (typically 6μA) and a low shutdown current (less than 1μA), making it ideal for portable applications or those powered by battery.

Conclusion

The LTC3118EUFD#PBF is a high efficiency synchronous buck-boost DC/DC converter that is extremely versatile and capable of automatically delivering the best efficiency for a variety of different application fields. Its features include an input voltage range of 2.7V to 60V, an output voltage of up to 20V, a switching frequency up to 1.2MHz, up to 98% efficiency, current-mode control, and overvoltage, overcurrent, undervoltage and thermal shutdown protection. The LTC3118EUFD#PBF is suitable for many automotive, consumer and industrial applications and is ideal for portable or battery-powered devices.

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