Analog Devices Inc.

LT3088IST

LT3088IST Description

The LT3088IST is a high-performance linear voltage regulator designed by Analog Devices Inc., offering adjustable output voltage capabilities. This regulator is housed in a surface-mount SOT223 package, making it suitable for compact and efficient power supply designs. The LT3088IST supports a wide input voltage range, from 0V to 36V, and can deliver up to 800mA of output current. Despite its high output current capability, the maintains regulator a low dropout voltage of 1.6V at 800mA, ensuring efficient operation even at lower input voltages.

The LT3088IST features a low quiescent current of 50.5 µA, which is crucial for applications requiring minimal power consumption during standby or low-load conditions. Additionally, the regulator boasts a high power supply rejection ratio (PSRR) of 90dB at 120Hz, which tapers to 20dB at 1MHz, providing excellent noise filtering and stability. The device also includes comprehensive protection features such as over-current, over-temperature, reverse polarity, and short-circuit protection, ensuring robustness and reliability in various operating conditions.

LT3088IST Features

• Adjustable Output Voltage: The LT3088IST provides an adjustable output voltage range from 0V to 34.5V, offering flexibility for a wide array of applications.
• High Input Voltage Range: With a maximum input voltage of 36V, the regulator can handle a broad spectrum of input sources, making it versatile for different power supply requirements.
• Low Dropout Voltage: The maximum dropout voltage of 1.6V at 800mA ensures efficient operation, even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: A quiescent current of 50.5 µA minimizes power consumption in low-load or standby conditions, enhancing overall efficiency system.
• High PSRR: The regulator offers a high PSRR of 90dB at 120Hz, which decreases to 20dB at 1MHz, providing excellent noise rejection and stable output voltage.
• Comprehensive Protection Features: The LT3088IST includes over-current, over-temperature, reverse polarity, and short-circuit protection, ensuring reliable operation and safeguarding against various fault conditions.
• Surface-Mount Package: The SOT223 package is ideal for surface-mount technology, enabling compact and space-efficient designs.

LT3088IST Applications

The LT3088IST is well-suited for applications requiring a stable and efficient power supply with adjustable output voltage. Its wide input voltage range and low dropout voltage make it ideal for battery-powered devices, where the input voltage can vary significantly. The low quiescent current and high PSRR are particularly beneficial for applications sensitive to power consumption and noise, such as precision instrumentation, medical devices, and portable electronics.

The comprehensive protection features ensure that the regulator can withstand harsh operating conditions, making it suitable for industrial and automotive applications where reliability and robustness are paramount. The surface-mount package also allows for integration into compact and high-density PCB designs, which is essential for modern electronics.

Conclusion of LT3088IST

The LT3088IST is a versatile and high-performance linear voltage regulator that offers adjustable output voltage, low dropout voltage, and low quiescent current. Its wide input range voltage, high PSRR, and comprehensive protection features make it an excellent choice for a variety of applications, from precision instrumentation to portable electronics. Despite being marked as obsolete by Analog Devices Inc., the LT3088IST remains a reliable and efficient solution for power supply designs that require flexibility, efficiency, and robustness.