LTC1628IG-PG#TRPBF

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LTC1628IG-PG#TRPBF Application Field and Working Principle

The LTC1628IG-PG#TRPBF is a high performance, high input voltage, 3A step-down, voltage regulator with integrated FET Driver that is often used in systems where reliable high voltage, high efficiency and low cost are needed. It features a wide input voltage range of 4.5V to 40V and can be operated with pulse-width modulation (PWM) from 0 to 500kHz. The integrated FET Driver provides the extra capability of having adjustable, low gate current and multi-factor shutting down of both FETs to reduce power dissipation during low duty cycles for power saving in standby conditions.

Application

The LTC1628IG-PG#TRPBF is ideal for a wide range of applications such as battery-operated equipment, point-of-load conversion, set-top boxes, and industrial supply. Its high input voltage range allows it to operate directly from unregulated AC sources, and its adjustable 200mA FET driver makes it ideal for load switching applications. Additionally, its high efficiency and large 4.5 V to 40V input voltage range make it suitable for a variety of applications.

Working Principle

The working principle of the LTC1628IG-PG#TRPBF is relatively simple. It starts when a PWM signal is applied to its Input Comparator, and then the FET driver triggers a switching action. When the PWM signal is low, the FETs are both off, and the output voltage (VOUT) is maintained by the power inductor and output capacitor. The inductor stores energy, and holds the output voltage relatively constant. When the PWM signal is high, the FETs both turn on and the energy in the inductor is discharged into the output capacitor, thus producing a regulated voltage at the output. This switching action is repeated continuously, and the amount of time that the FETs are on is determined by the duty cycle of the PWM signal, thus allowing for adjustable output voltage.

Conclusion

The LTC1628IG-PG#TRPBF is a high performance, high input voltage, 3A step-down voltage regulator with integrated FET Driver. It features a wide input voltage range of 4.5V to 40V, an adjustable 200mA FET driver, and can be operated with pulse-width modulation (PWM) from 0 to 500kHz. The working principle is relatively simple and the output voltage can be adjusted by changing the duty cycle of the applied PWM signal. The LTC1628IG-PG#TRPBF is ideal for a wide range of applications such as battery-operated equipment, point-of-load conversion, set-top boxes, and industrial supply.

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