LTC1754ES6-5#TRPBF

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The LTC1754ES6-5#TRPBF is a DC/DC switching regulator controller designed for high-frequency switching power-supply applications. This device is designed to switch power efficiently between a pair of supplies to control the output voltage with a minimum of loss and noise. It features a wide programmable operating frequency range with a choice of adjustments, integrated short-circuit and overcurrent protection, and low cost voltage control.

This integrated circuit requires a few external components—a few resistors and capacitors—and is easy to use. It can operate in a very wide range of input and output voltage values. Its large operating range makes it ideal for a wide variety of power-supply applications including voltage regulation for automotive, industrial, and computer applications. The integrated circuit is offered in a full-packaging configuration.

The LTC1754ES6-5#TRPBF requires two external voltage sources—the input voltage and the output voltage—to be provided externally. It comprises a top and bottom switch MOSFET, a power supply voltage regulator, and several other integrated circuits such as a current-sense circuitry, an oscillator, a comparator and an output voltage regulator. The external components along with the integrated circuits form a complete electrical circuit to regulate the output voltage.

The external components set the power-supply operating frequency and the output voltage. The input voltage is then switched through the top and bottom switches with the help of the integrated MOSFET, whose switching frequency is regulated by the internal oscillator. The internal current-sense circuitry controls the current and voltage across the MOSFETs, so as to protect the device from short-circuit conditions, overcurrent conditions and voltage spikes. The current-sense circuitry is connected to the output voltage regulator, and its output is compared against a reference voltage. If the differential voltage is higher than the reference voltage, then the output of the voltage regulator is decreased; or if it is lower, then the output is increased. Thus, the output voltage is regulated to the required levels.

The LTC1754ES6-5#TRPBF also features integrated over-voltage protection and over-temperature protection. The device can also be programmed to automatically switch off the power supply when certain conditions are met. All these features make this integrated circuit an ideal solution for power-supply applications requiring high efficiency, low noise, and low cost voltage control.

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