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LT1110CN8#PBF Application Field and Working Principle

LT1110CN8#PBF is a high efficiency, low quiescent current, low noise and full protection DC-DC switching regulator, classified as a PMIC (Power Management IC) Voltage Regulator, integrated with several protection features, such as over voltage protection, temperature protection and over current protection. It has a wide input voltage range, from 2.5V to 15V and adjustable output voltage from 1.25V to 13.2V. The LT1110CN8#PBF also integrated a high voltage start up regulator which enables operation even with input voltage as low as 2.7V.

The main application field of the LT1110CN8#PBF is in low power devices, like cell phones, tablets, and portable electronics, where a higher efficiency and low quiescent current consumption is needed along with full protection features. It can also be used in battery-powered applications, since it can work with a wide input voltage range and it has very low quiescent current.

Working Principle

The LT1110CN8#PBF is based on a high-current, voltage-mode, synchronous boost regulator that provides up to 2.5A of output current with extremely high efficiency. The device operates as a step-up voltage regulator, taking a low voltage input and producing a regulated output voltage. In order to accomplish this, the LT1110CN8#PBF relies on an internal charge pump, producing a negative voltage relative to the input voltage. This negative voltage is used to break the circuit of the inductor and turn off the internal FET. The output voltage is regulated through the regulation of the on-time of the switch.

The internal power FET and high-side current sensing resistors allow for an extremely low total solution cost while still providing over current protection with a discreet externally added P-Channel MOSFET. The device also include under voltage protection and thermal shutdown.

The features of the LT1110CN8#PBF, such as its wide input voltage range, high efficiency, low quiescent current and full protection features, make it an ideal power solution for portable devices, battery powered applications and other low power electronics.

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