LTC3554EUD-2

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The Lite-On LTC3554EUD-2 is a high-performance power management IC widely used in consumer electronics. It is part of the Lite-On Specialized range and is specifically designed to provide an efficient, reliable and cost-effective solution for power management in all consumer electronics applications. The LTC3554EUD-2 is a highly integrated buck converter with a low power consumption, wide operating temperature range and 3A of minimal total output current. It provides all of the features needed for efficient power management in consumer electronics applications.

The LTC3554EUD-2 is a switcher step-down DC/DC voltage regulator, with constant frequency current mode architecture. It integrates a low RDS(ON) external MOSFET and N-CH MOS switch to achieve excellent efficiency, fast transient response, low current consumption and low external component count. With a finished size of just 5mm x 8mm, it is ideal for space and size-constrained applications. The device is specifically designed to operate and efficiently convert two cells Li-Ion/polymer battery to a regulated voltage.

The LTC3554EUD-2 operates in two condition, externally enabled and under light load operation. During normal operation, the voltage at the enable pin affects the power to the device and the input voltage is less than the enable voltage. At heavy load, the enable voltage is greater than the input voltage and the LTC3554EUD-2 is forced in the full current operations mode, with the battery voltage remaining constant on the output. It also features soft-start and an integrated power-on reset (POR) function.

The LTC3554EUD-2 have a number of innovative features such as over temperature, overcurrent, under voltage and over voltage protection mechanisms, automatic switchover for low drop-out operation, adaptive frequency transient response and power save mode, leading to improved efficiency, higher reliability and fewer external components. The device accepts an input of up to 8V and delivers an output voltage adjustable from 0.6V to 5V. It also includes 3A switch current and 2.75A steady output current.

The LTC3554EUD-2 has multiple integrated protection mechanisms such as over temperature, overcurrent, and short circuit protection. It also has an output reset function which automatically resets the device when the output voltage is lower than the indicated voltage. It includes an external regulator to detect the output voltage, and it generally requires one P-MOSFET and two capacitors as external components.

The LTC3554EUD-2 is an efficient, low power, and highly integrated power management IC for consumer electronics, and can be applied in a variety of applications. It is designed for battery-powered devices such as mobile phones, media players, remote controls and other battery operated equipment. The device provides high efficiency, excellent transient response, low noise, and superior cost and size advantages. The LTC3554EUD-2 can also be used in other power management applications such as automotive, medical, portable instruments and products.

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