LTC3589EUJ-2#TRPBF

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The LTC3589EUJ-2#TRPBF from Linear Technology is a 30-VIN 4.5V–36V, 4A synchronous monolithic step down switching regulator with an on-time controlled by the external timing resistor. It offers high efficiency, low ripple and fast transient response. The device is specifically designed to meet the needs of automotive, industrial and telecom power applications, with a low dropout voltage, wide input voltage range, high current output and low shutdown current. This efficient and flexible power management IC can be used to supply power-hungry applications requiring efficient step-down conversion.

Introduction

The LTC3589EUJ-2#TRPBF is a high efficiency, low-noise monolithic synchronous synchronous step down switching regulator that is optimized for automotive, industrial, and telecom applications. It is a low dropout, wide input voltage range, four-channel power management IC that delivers up to 4A of continuous output current and operates from 4.5V to 36V input. It features 0.9 µA shutdown current, 12nA reference output current, and an adjustable output current limiting. The device is designed to support a wide range of input voltage and output voltages and provides a very low dropout voltage. It also provides a highly efficient regulation of the input current and utilizes an on-time controlled by the external timing resistor.

Features

The LTC3589EUJ-2#TRPBF has a variety of features which make it an ideal power management solution for automotive, industrial and telecom applications. These features include:

• On-time controlled by the external timing resistor.
• High efficiency: up to 97% no-load.
• Low ripple and fast transient response.
• 0.9 µA shutdown current.
• 12nA reference output current.
• Low dropout voltage.
• Wide input voltage range: 4.5V–36V.
• High current output.
• Adjustable output current limiting.

Applications

The LTC3589EUJ-2#TRPBF is an optimal solution for automotive, industrial and telecom power systems which require efficiency, flexibility and reliable operation. Its wide input voltage range and low dropout voltage make it ideal for high-current applications such as power-hungry sensors and microprocessors. It is also suitable for automotive applications including engine controllers, HVAC controllers, airbag controllers and transmission controllers as well as programming bias and power conditioning circuits.

Working Principle

The LTC3589EUJ-2#TRPBF offers high-efficiency voltage regulation by using an on-time control. This on-time is determined by the external timing resistor, which is typically a value between 1 and 4 Ω. The on-time is then used to adjust the duty cycle of the switching regulator. As the duty cycle is adjusted, the output voltage is kept constant and the input current is regulated. This ensures a very high efficiency for the step down converter and ensures that the system runs reliably.

The LTC3589EUJ-2#TRPBF also features a current-limit control that can be adjusted with the external current limit resistor. This allows current to be limited below the 4A specified limit. This feature helps to prevent system faults due to over current situations.

Additionally, the LTC3589EUJ-2#TRPBF offers low noise and high frequency operation, making it ideal for industrial and telecom applications requiring efficient power conversion.

Conclusion

The LTC3589EUJ-2#TRPBF is an ideal solution for automotive, industrial and telecom power management applications. Its wide input voltage range, high efficiency, low ripple, and fast transient response make it an excellent choice for powering high-current applications. The adjustable on-time and output current limiting features provide additional flexibility and control for the system.

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