LT1424IS8-5#TRPBF

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LT1424IS8-5#TRPBF Application Field and Working Principle

LT1424IS8-5#TRPBF, which belongs to the PMIC (Power Management Integrated Circuit) family and falls within the DC DC Switching Regulators Voltage Regulator subsection, is a DC to DC converter integrated circuit (IC) designed to provide a regulated output voltage with a wide input voltage range. It is basically a switching regulator that uses a buck converter topology.

Application Fields of LT1424IS8-5#TRPBF

LT1424IS8-5#TRPBF is especially suitable for applications requiring high efficiency, low noise, wide input voltage range and small form factor, such as portable computer, notebook computer power supply, monitor power supply, ultra-thin laptops, LED lightings, server applications, automotive and industrial products, etc. This IC also offers a wide operating temperature range of -40°C to +125°C.

Working Principle of LT1424IS8-5#TRPBF

When the external voltage source is connected, a step-down DC-DC converter is formed, which works according to the buck converter topology. The converter consists of a MOSFET switch, an inductor, a Schottky diode, a filter capacitor and an oscillator. The output voltage is regulated by controlling the duty cycle of the switch. A PWM signal generated by the oscillator is used to turn on and off the switch at a constant frequency.

When the switch is in the on mode, the input voltage will flow through the switch, the inductor and the ground, and is stored in the form of magnetic energy. When the switch is turned off, the stored energy is released through the Schottky diode to the filter capacitor and delivers the output voltage.

An external Error Amplifier is used to compare the output voltage feedback signal with a reference voltage, in order to adjust the duty cycle of the switch and output voltage as to maintain the voltage within a certain range. The output voltage can be easily adjusted to the desired value using the two internal resistors inside the IC.

LT1424IS8-5#TRPBF offers a wide range of protection features. Over-current protection, short circuit protection, under-voltage lockout protection, over-temperature protection and soft-start protection are all available to ensure the safety of the system.

Conclusion

LT1424IS8-5#TRPBF is a highly versatile DC to DC converter which is suitable for a wide range of applications. It is easy to use and provides high efficiency, low noise and wide input voltage range. The regulator can be easily configured using two external resistors and the output voltage can be easily adjusted using the internal Error Amplifier. The IC is also equipped with advanced protection functions for safety.

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