LTC3636IUFD#PBF

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LTC3636IUFD#PBF Application Field and Working Principle

The LTC3636IUFD#PBF is part of a comprehensive baseline voltage regulator portfolio developed by Linear Technology Corporation, part of Analog Devices Inc. The LTC3636IUFD#PBF is a simple high frequency, step-down power converter suitable for a variety of applications such as buck converters, point-of-load regulators and battery chargers. It has a wide input voltage range from 4.5 V to 36 V and can deliver up to 800 mA continuous output current with a fast transient response, low quiescent current and an efficient, low-profile (30 mm) package size.

The LTC3636IUFD#PBF features an integrated 1.2 V internal reference which can be adjusted over a wide 1.5 V to 5.5 V range. It allows the user to set the output voltage of the converter to some desired value within the range, and the output voltage is then maintained in spite of the variations in input voltage or load. It also features Burst Mode operation and a PWM feature control with an adjustable switch frequency. This allows the integrated inductor to store energy more efficiently to deliver higher power and also reduce ripple of output voltage.

As a high frequency, step-down (buck) power converter, the LTC3636IUFD#PBF serves as a DC-to-DC converter, providing a regulated output voltage which is lower than the input voltage. It works on the principle of pulse-width modulation (PWM). The input voltage is chopped into a series of pulses by a high-speed MOSFET switch. The width of the pulses determines the amount of output voltage that is delivered to the load. The output voltage is determined by the average of the input voltage after it is chopped. The amount of chopping is controlled by a PWM comparator, which compares the output voltage and the voltage reference to determine the pulse width.

The efficient operation of the LTC3636IUFD#PBF is maximized by its advanced synchronous-rectification scheme that eliminates the Schottky diode. Its loop compensation ensures fast transient response, accurate output voltage and low Ripple voltage coefficient. Its Burst Mode operation allows a virtually folded-back output voltage with extremely low quiescent current in light load conditions, extending current efficiency and battery life in portable applications.

These features make the LTC3636IUFD#PBF an ideal way to provide regulated power in a variety of situations. It is ideal for on-the-fly power-rail adjustments and can be used in a wide range of industrial, computing, portable and consumer applications.

The LTC3636IUFD#PBF is a highly sophisticated and versatile DC-to-DC power converter that is suitable for a variety of applications. It is classified under PMIC - Voltage Regulators - DC DC Switching Regulators, enabling the user to take advantage of the compact, efficient and accurate power conversion technology provided by Linear Technology Corporation.

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