LT3021EDH#TRPBF

Introduction to LT3021EDH#TRPBF

The LT3021EDH #TRPBF is a step-down, linear voltage regulator from Linear Technology. With low dropout voltage operation, wide input voltage range and high current operation, this device is ideal for on-board rail regulation and many point-of-load applications.The LT3021EDH #TRPBF features a wide input voltage range of 4.5V to 27V, low 200mV dropout voltage, and provides output current up to 1.5A. The device is offered in a 6-pin MSOP package, making it easy to use in a variety of applications. In addition, it has very low quiescent current, extremely low output voltage noise, and high power supply rejection ratio (PSRR).

Applications

The LT3021EDH #TRPBF is ideal for on-board rail regulation and many point-of-load applications. Some typical applications include:

• On-board voltage regulator for digital and analog circuits
• Point-of-load regulation for portable equipment
• Industrial, medical, and telecom supplies
• Voltage generation for memory circuits, local regulators, and digital signal processors
• Battery charging
• ADC, DAC, and ASIC power supplies

Workinig Principle

The LT3021EDH #TRPBF is a linear voltage regulator using a standard voltage regulation technique known as series-pass regulation. This means that the voltage regulator is basically a linear circuit, with the output in series with the load. The output is regulated by controlling the series pass transistor, which acts as a variable resistor. The amount of resistance is adjusted by varying the base voltage of the transistor.

The LT3021EDH #TRPBF uses a high gain error amplifier to monitor the output voltage and compare it with a reference voltage. When the output voltage falls below the reference, the error amplifier increases the base voltage of the series pass transistor, increasing the resistance and allowing more current to flow. This brings the output voltage back up to the desired level. Conversely, when the output voltage is above the reference, the error amplifier lowers the base voltage of the series pass transistor, reducing the resistance and allowing less current to flow. This brings the output voltage back down to the desired level.

The LT3021EDH #TRPBF also features current limiting and over-temperature protection, making it a safe solution for a variety of applications. In addition, its low dropout voltage and high current capability make it a great choice for point-of-load applications.

Conclusion

The LT3021EDH#TRPBF is a versatile and reliable linear voltage regulator from Linear Technology. With its low dropout voltage, wide input voltage range, and high current operation, it is ideal for on-board rail regulation and many point-of-load applications. In addition, its features of current limiting and over-temperature protection offer safe and reliable performance for a variety of applications.