**LT3045EDD#TRPBF: An Ultra-Low Noise, High PSRR LDO Voltage Regulator for Precision Applications**

In the realm of precision electronics, where the integrity of a power supply can define the performance of an entire system, the **LT3045EDD#TRPBF** stands out as a pinnacle of linear regulator design. This monolithic, low-dropout (LDO) voltage regulator from Analog Devices is engineered specifically for applications demanding the absolute highest level of power purity, setting a new benchmark with its **ultra-low noise and exceptionally high power supply rejection ratio (PSRR)**.

The core of the LT3045's superior performance lies in its unique architecture. Unlike conventional LDOs that rely on a voltage reference driving an error amplifier, the LT3045 employs a **precision current reference followed by a high-performance voltage buffer**. This "current-reference" architecture is the fundamental reason for its remarkably low output noise. The device achieves an astonishingly low RMS noise of just **0.8μV from 10Hz to 100kHz** and an even lower spot noise of **2nV/√Hz at 10kHz**. This makes it virtually imperceptible to even the most sensitive components, such as high-resolution ADCs, DACs, precision sensors, and RF circuitry.

Furthermore, the LT3045 exhibits an unparalleled PSRR, exceeding **76dB at 1MHz**. This exceptional ability to reject ripples and noise from the input supply is crucial in noisy environments or when the regulator is fed by a switching converter. It ensures that disturbances on the input do not propagate to the critical load, maintaining a clean and stable output voltage.

Designed for flexibility, the LT3045 offers a wide input voltage range of 1.8V to 20V and provides a user-adjustable output voltage from 0V to 15V with a single external resistor. It can deliver up to 500mA of output current while maintaining a low 260mV dropout voltage at full load. The device also incorporates comprehensive protection features, including internal current limiting with foldback and thermal shutdown with hysteresis.

Housed in a compact 3mm x 3mm DFN package, the **LT3045EDD#TRPBF** is the ideal solution for powering noise-sensitive applications across medical instrumentation, test and measurement equipment, aerospace systems, and advanced communication infrastructure. Its ability to provide a rock-solid, ultra-clean voltage rail is unmatched, making it an indispensable component for engineers tackling the most demanding design challenges.

**ICGOO FIND:** The LT3045EDD#TRPBF is not just an LDO; it is a precision instrument for your power rail. Its groundbreaking current-reference architecture delivers unmatched noise and PSRR performance, establishing it as the definitive choice for powering the most sensitive analog and RF circuits where even microvolts of noise matter.

**Keywords:** Ultra-low noise LDO, High PSRR, Precision voltage regulation, LT3045EDD#TRPBF, Current-reference architecture.