**LT3066EDE#TRPBF: A Comprehensive Technical Overview of Analog Devices' Ultra-Low-Noise 200mA LDO Voltage Regulator**

In the realm of precision power management, the performance of low-dropout (LDO) voltage regulators is critical for powering noise-sensitive applications. The **LT3066EDE#TRPBF** from Analog Devices stands out as a premier solution, engineered to deliver exceptional accuracy, ultra-low noise, and high power supply rejection in a compact package. This article provides a detailed technical examination of this advanced regulator.

The LT3066 is a versatile, high-performance LDO capable of supplying **200mA of continuous output current** with a very low dropout voltage of only 300mV at full load. Its adjustable output voltage range, from **0.6V to 45V**, offers unparalleled flexibility for a vast array of circuits, from battery-powered portable instruments to high-voltage industrial systems.

A defining characteristic of the LT3066 is its **ultra-low output noise performance**. Utilizing an innovative architecture, it achieves a remarkably low noise level of **just 25μVRMS (10Hz to 100kHz)** without requiring an external bypass capacitor. For applications demanding the quietest possible supply, an optional external reference bypass capacitor can further reduce noise to an almost imperceptible **3.5μVRMS**. This makes it an ideal power source for RF and precision analog circuitry, including PLLs, VCOs, ADCs, DACs, and high-fidelity audio components.

Further enhancing its performance is an **exceptional Power Supply Rejection Ratio (PSRR)**. The LT3066 maintains a high PSRR of up to 76dB at 120Hz and remains above 50dB out to 10kHz, effectively isolating the regulated output from ripples and transients on the input supply. This ensures stable, clean power even in electrically noisy environments.

The device incorporates comprehensive protection features to ensure system reliability. It is protected against **overcurrent conditions and reverse-battery connections**. Crucially, it also includes **reverse current protection**, preventing current from flowing backwards from the output to the input if the input supply is shorted or absent. An programmable current limit and a power-good flag for output monitoring further bolster its robustness.

Housed in a **12-lead 4mm x 3mm DFN package** (as well as an MSOP), the LT3066EDE#TRPBF offers a high level of performance in a minimal footprint. Its wide input voltage range (1.8V to 45V) and ability to operate with very small, low-ESR ceramic output capacitors simplify design and reduce the overall solution size.

**ICGOOODFIND:** The Analog Devices LT3066EDE#TRPBF is a superior ultra-low-noise LDO regulator that sets a high bar for performance. Its combination of **wide adjustable voltage range, ultra-low noise, high PSRR, and robust protection features** makes it an indispensable component for designers tackling the most demanding power integrity challenges in medical, test and measurement, communications, and industrial applications.

**Keywords:**

* **Ultra-Low Noise**

* **200mA LDO Regulator**

* **High PSRR**

* **Adjustable Voltage**

* **Reverse Current Protection**