Analog Devices Inc. LT1764AEFE#TRPBF

LT1764AEFE#TRPBF and LT1764A Series Product Summary

The Analog Devices LT1764AEFE#TRPBF is a member of the LT1764A series, a family of high-performance, fast transient response, low dropout (LDO) linear voltage regulators. Designed for demanding applications that require stable, noise-sensitive power supply and high output current, the LT1764AEFE#TRPBF offers an adjustable output with a maximum 3A current capacity. Its robust design and precision specifications position it as a versatile solution for both RF and logic supply rails, post-regulation after switching converters, and other sensitive circuitry in modern electronic systems.

Highlights and Main Attributes of LT1764AEFE#TRPBF and LT1764A Series

The LT1764AEFE#TRPBF and its series introduce several core advantages for engineers demanding reliable performance:

Fast transient response for dynamic load conditions.

Output current capability up to 3A, addressing moderate-to-high load applications.

Ultra-low dropout voltage—typically 340mV at 3A—enabling efficient operation even with low headroom between input and output.

Adjustable output range from 1.21V to 20V, as well as fixed versions at 1.5V, 1.8V, 2.5V, and 3.3V.

Low output voltage noise (40μVRMS between 10Hz and 100kHz), ideal for noise-sensitive analog/RF systems.

Wide input voltage tolerance, with operation from 2.7V to 20V.

Stable operation with output capacitors as low as 10μF (ceramic, tantalum, or aluminum electrolytic), facilitating compact PCB designs.

Controlled quiescent current that remains low even in dropout and drops below 1μA during shutdown, contributing to energy efficiency.

Internal enable functionality for easy system-level control.

Electrical Specifications and Performance Metrics for LT1764AEFE#TRPBF and LT1764A Series

From an engineering perspective, technical benchmarks define the LT1764AEFE#TRPBF’s suitability for precision power supply design:

Supply Current & Quiescent Current: The device’s typical quiescent current is just 1mA during normal operation, remaining stable even under dropout conditions. In shutdown mode, quiescent current drops below 1μA, supporting battery-powered and low-standby-current applications.

Dropout Voltage: The LDO’s dropout voltage is a primary product differentiator. LT1764AEFE#TRPBF delivers just 0.34V dropout at its rated 3A load, supporting applications where tight voltage margins matter.

Line and Load Regulation: With line regulation typically below 10mV and load regulation in the range of 5–30mV across the full output current range, the LT1764AEFE#TRPBF ensures stable output despite input fluctuations or dynamic load transients.

Noise and Ripple Rejection: The device achieves 40μVRMS output noise (10Hz–100kHz) in typical configurations and ripple rejection of up to 63dB at 120Hz, supporting sensitive analog and RF loads.

Shutdown and Enable Thresholds: Integrated logic enables system-level control for power sequencing or fault management, with input thresholds optimized for reliable system integration.

Output Current Capabilities: The LT1764A series incorporates internal current limiting at approximately 3.1A, ensuring overload protection while simultaneously supporting high current requirements.

Packaging Formats and Physical Properties of LT1764AEFE#TRPBF and LT1764A Series

Physical and installation considerations are critical for PCB design and thermal management:

The LT1764AEFE#TRPBF arrives in a compact 16-lead TSSOP-EP package, measuring 4.40mm width and designed for surface mount applications with an exposed pad for enhanced thermal dissipation.

Other LT1764A series offerings include 5-lead TO-220 and DD packages, catering to designs requiring either through-hole mounting or larger heat sinking.

The package allows operation in the junction temperature range from -40°C to +125°C (E grade), which is suitable for industrial and most commercial applications.

Thermal resistance and maximum junction temperature (TJmax = 150°C) specifications ensure reliable operation under full load conditions and simplify thermal modeling.

Safety Features, Durability, and Certification Details for LT1764AEFE#TRPBF and LT1764A Series

Protection features and industry compliance status often drive procurement and risk assessment decisions:

Built-in protections include reverse battery protection, overcurrent/short-circuit protection (current limit), thermal shutdown, and reverse current blocking. These features increase system reliability and prevent damage from common electrical faults.

The device is RoHS3 compliant, reflecting industry expectations for hazardous material management.

Moisture Sensitivity Level (MSL) is classified as 1 (unlimited), indicating suitability for standard reflow processes and high-volume automated assembly.

REACH and ECCN certifications are listed as unaffected and EAR99, respectively, ensuring broad global marketability.

Usage Examples and Selection Guidelines for LT1764AEFE#TRPBF and LT1764A Series

When approaching system power design, the LT1764AEFE#TRPBF’s strengths align with several key scenarios:

As a post-regulator following a noisy switching supply, the LT1764A’s low noise and high ripple rejection ensure supply rails meet the demanding requirements of high-precision analog, RF, and data-converter circuits.

With its capacity for fast transient response and stable operation on low-value ceramics, this solution is ideal for application processors, FPGAs, and microcontroller power rails where load steps are frequent.

The adjustable output allows the LT1764AEFE#TRPBF to be configured for supply voltages needed by emerging ICs, making it a flexible choice for platforms with changing requirements.

Engineers should consider input-output voltage headroom, load current, output noise, PCB real estate, and thermal environment when integrating the LT1764A series into their designs.

Alternative and Substitute Products for LT1764AEFE#TRPBF and LT1764A Series

Engineers and procurement specialists evaluating the LT1764AEFE#TRPBF should be aware of alternative sourcing and drop-in compatible solutions:

Within the LT1764A series, fixed output versions (LT1764AEFE-1.5, LT1764AEFE-1.8, LT1764AEFE-2.5, LT1764AEFE-3.3) provide direct alternatives where regulator output does not need adjustment.

Other LT1764A package variants, such as the LT1764AET or LT1764AEQ (for TO-220 and DD packages), serve as replacements when mounting requirements or thermal management strategies differ.

For applications demanding similar performance outside of Analog Devices’ LT1764A line, comparison can be drawn against other high-current, low noise LDOs with fast transient response and similar voltage/current characteristics.

Conclusion

The Analog Devices LT1764AEFE#TRPBF and LT1764A series stand out as versatile, robust solutions for high-current, low dropout voltage regulation in platforms where performance, stability, and reliability are paramount. Engineers focused on precision analog, RF, and low-noise applications will find the LT1764AEFE#TRPBF’s capabilities aligned with both technical and system integration needs. With broad package options, comprehensive protections, and compliance with global standards, these regulators offer procurement teams confidence in quality and supply continuity. Ultimately, the LT1764AEFE#TRPBF exemplifies how modern LDOs are engineered to meet the evolving demands of advanced electronic systems.