LT1129CQ-3.3#PBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Linear voltage regulators are a type of power management IC (PMIC) that maintain a steady voltage over a specified range. The LT1129CQ-3.3#PBF is a 3.3V low dropout (LDO) voltage regulator that operates over a wide range of input voltage, delivering up to 500mA of output current. It has excellent thermal performance and high efficiency. This article will discuss the application fields, features and working principle of the LT1129CQ-3.3#PBF.

Application Fields

The LT1129CQ-3.3#PBF is a drop-in device suitable for any 3.3V application that requires a constant voltage. It is well-suited for powering FPGA and processor cores, powering SRAMs, and regulating and controlling the power supplies for transceivers and ASICs. The device is also suitable for post regulation of switching regulators, providing a steady voltage for low power (less than 500mA) systems.

Features

The LT1129CQ-3.3#PBF offers a variety of features, while maintaining high efficiency. The device offers a low dropout voltage, allowing it to be used in high-power applications with a wide input range of 2V to 7.5V. Its low temperature coefficient ensures temperature stability, and its high power supply rejection ratio and low noise makes it suitable for high-frequency analog and digital circuits. Additionally, the device allows for very low output voltage noise and ripple, ensuring a low output impedance for the system.

Working Principle

The LT1129CQ-3.3#PBF operates by using a linear regulator to maintain the output voltage at a constant level over a given range of input voltage. When the input voltage drops below the reference voltage, the linear regulator will draw current to keep the output voltage grounded. The output voltage is regulated by a constant current source, which works by drawing current from the input to offset the error amplifier. This maintains a constant current, which is proportional to the reference voltage set by the user.

When the load on the regulator increases, the drop in load voltage will cause an increase in the voltage present on the reference pin. The error amplifier will then adjust the constant current source as needed to maintain the desired output voltage. This process will continue as the load conditions change and the output voltage remains at the required level.

Conclusion

To sum it up, the LT1129CQ-3.3#PBF is a low dropout (LDO) voltage regulator that offers high efficiency and excellent thermal performance. It is suitable for any 3.3V application that requires a constant voltage, offering a low input voltage range, simple operation, low noise, power supply rejection ratio and high current output. The operation of the device is based on the linear regulator, using a constant current source to maintain the desired output voltage over a given range of input voltages.

The specific data is subject to PDF, and the above content is for reference