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LT3021EDH

LT3021EDH Description

The LT3021EDH from Analog Devices Inc. is a high-performance, low-dropout (LDO) linear voltage regulator designed for precision power management in demanding applications. With an adjustable output range of 0.2V to 9.5V and a robust 500mA output current, this regulator excels in systems requiring tight voltage regulation and low noise. Its ultra-low dropout voltage of 0.285V at 500mA ensures efficient operation even with minimal headroom, making it ideal for battery-powered and space-constrained designs. The device operates from an input voltage up to 10V and features a low quiescent current of 250 µA, enhancing energy efficiency.

LT3021EDH Features

• Adjustable Output: Wide range (0.2V to 9.5V) for versatile design flexibility.
• Low Dropout Voltage: 0.285V @ 500mA maximizes efficiency in low-input scenarios.
• High PSRR: 70dB at 120Hz ensures superior noise rejection for sensitive analog/digital loads.
• Advanced Protection: Includes over-current, over-temperature, and reverse-polarity safeguards.
• Enable Control: Allows for power sequencing and standby mode, reducing power consumption.
• Compact Package: 16-pin DFN surface-mount package (Tube packaging) suits space-constrained PCBs.
• Low Quiescent Current: 250 µA minimizes standby power loss.

LT3021EDH Applications

The LT3021EDH is particularly suited for:

• Portable/Battery-Powered Devices: Such as medical instruments, handheld test equipment, and IoT sensors, where low dropout and efficiency are critical.
• Industrial Systems: Including PLCs, process control, and automation, benefiting from its high PSRR and robustness.
• Telecom/Networking Equipment: Where stable voltage rails are needed for FPGAs, ASICs, and RF modules.
• Aerospace & Defense: Due to its reliability and protection features in harsh environments.

Conclusion of LT3021EDH

The LT3021EDH stands out as a high-efficiency, precision LDO regulator with exceptional dropout performance and advanced protection features. Its combination of low noise, high PSRR, and compact form factor makes it a superior choice for applications demanding reliable power in constrained or battery-operated systems. While the product is now obsolete, its legacy performance remains a benchmark for low-power, high-accuracy voltage regulation. Engineers seeking alternatives should consider newer Analog Devices LDOs with similar or enhanced specifications.