LT3758AEDD#PBF

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The LT3758AEDD#PBF is a high-frequency, high-efficiency Low Drop Out (LDO) switching regulator controller that operates from an input voltage of 2.25 V to 15 V with an adjustable output voltage from 0.6 V to 5.5 V. It comes in a Green, Halogen and Antimony Free, 16-Pin, 4 × 4 mm QFN, RoHS-compliant package. It is ideal for applications where a wide input voltage range, high efficiency, and very low noise are key considerations.

The LT3758AEDD#PBF is a current mode, DC-DC switching regulator controller that can be used to regulate both step-up and step-down applications. It has integrated Linear Regulator Control (LRC) circuitry to provide low noise and fast transient response to load transients. The chip also has Internal Digital Soft-Start, and a 0.6V reference voltage for setting the output voltage. The internal current limit circuitry provides protection against output over-current and short-circuit conditions.

The LT3758AEDD#PBF\'s application field can be broadly classified into two areas: step-up (boost) and step-down (buck) converters, and the output voltage range is 0.6V to 5.5V. The chip\'s operating frequency range is from 100kHz to 3MHz and it has an adjustable switching frequency, which can be set by an external resistor. It is ideal for pulse-width modulation (PWM) and pulse-frequency modulation (PFM) modes of operation.

The working principle of the LT3758AEDD#PBF is based on current-mode control. The output voltage is monitored by an external feedback voltage, while the current flow through the inductor is monitored by a current sense amplifier. The Control Loop compares the measured output voltage to the reference voltage and generates an error signal to be fed back to the switching driver. The switching driver accepts the error signal and controls the on/off time of the MOSFET that switches the input voltage to the output to regulate the output voltage.

The LT3758AEDD#PBF is optimized for high efficiency, fast transient response, and low noise operation, making it well suited for automotive and portable applications. Its wide operating voltage range and low component count makes it ideal for a variety of applications where the output voltage requirement is adjustable.

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