LT3506EFE#TRPBF Integrated Circuits (ICs)

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LT3506EFE#TRPBF application field and working principle

The LT3506EFE#TRPBF is a synchronous buck regulator and part of the wide range of DC-DC switching regulators in the family of Power Management Integrated Circuit (PMIC) products from Linear Technology. The combination of a high switching frequency and a +/- 2% accuracy ripple refulers to make the LT3506EFE#TRPbf an ideal choice for applications that require tight output voltage regulation and a smaller printed circuit board (PCB) and-component footprint.The LT3506EFE#TRPBF device has a switching frequency from 200kHz to 2.2MHz and a regulated output current up to 6A. It is well suited for applications that require wide input range, low noise, high efficiency, precise current limiting or adjustable output voltages, such as USB-powered accessories, wireless charging transmitters and portable medical devices.An integrated high frequency power MOSFET operates with a low gate voltage, allowing the use of a reverse current as well as pre-bias operation. It also features a two-phase system to spread the heat generated and efficient use of space. Built-in loop compensation eliminates the need for external compensation components and reduces the size of the total system, while reducing development time and cost.The LT3506EFE#TRPBF can operate in a wide input voltage range of 4.5V to 42V and has a guaranteed output accuracy of ±2% of the programmed voltage. It supports a continuous output current of 6A and can handle transients of up to 10A. The device can maintain a very low minimum on-time, resulting in high efficiency with light loads, as well as excellent light load/light load transient response.The LT3506EFE#TRPBF is designed to be used as a step-down, synchronous buck regulator. The two main components of a buck converter are a high-side MOSFET (N-channel lined up) and a low-side MOSFET (P-channel lined up). The power supply is connected to the top MOSFET and the output is connected to the bottom MOSFET. The power supply draws current from the drain of the high-side MOSFET and the output is taken from the source of the low-side MOSFET.The operation of the buck converter is controlled by a PWM signal. A high-side driver, low-side driver, oscillator and error amplifier are used together to generate the PWM signal. This PWM signal is used to modulate the current passing through the MOSFET. The high-side driver is used to provide the PWM signal to the gate of the high-side MOSFET, while the low-side driver is used to provide the PWM signal to the gate of the low-side MOSFET. The oscillator is used to set the switching frequency, while the error amplifier is used to monitor the output voltage and adjust the duty cycle of the PWM signal accordingly. The LT3506EFE#TRPBF provides superior performance and features, including an extremely low shutdown current, adjustable pulse-by-pulse current limit and adjustable soft-start. It has excellent line and load regulation, low dropout voltage, and uses easy-to-use external components, simplifying the design and improving system reliability.In conclusion, the LT3506EFE#TRPBF is an ideal solution for applications such as compact portable products, modern self-powered systems, and USB-rebated charging products. It offers high accuracy, high current rating and high efficiency, making it the perfect choice for applications that demand precise power delivery and exceptional thermal performance.

References

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