The LT3045EDD#TRPBF, manufactured by Analog Devices, is a high-performance, ultra-low noise linear regulator (LDO) designed for noise-sensitive applications. This adjustable positive voltage regulator delivers a continuous output current of 500 mA and supports an output voltage range from 0 V to 15 V, with a wide input voltage range of 1.8 V to 20 V. Housed in a compact DFN-10 package, it features an ultra-low dropout voltage of 260 mV and exceptional power supply ripple rejection (PSRR) of 76 dB, making it ideal for precision analog circuits. The device maintains high accuracy with a voltage regulation tolerance of ±1% and exhibits excellent line and load regulation. Typical applications include powering RF circuits, high-end audio equipment, and sensitive data converters where minimizing noise is critical.

Features

• Ultra-Low Noise Operation: Designed as an ultra-low noise linear regulator, minimizing output noise for sensitive analog and RF circuits.
• Wide Adjustable Output Range: Supports an adjustable output voltage from 0 V to 15 V, providing flexibility for various low-voltage rail requirements.
• High PSRR: Offers a typical ripple rejection of 76 dB, effectively filtering input supply noise for clean power delivery.
• Low Dropout Voltage: Features a low dropout voltage of 260 mV (max 350 mV), enabling efficient operation with minimal headroom.
• High Accuracy: Provides ±1% voltage regulation accuracy with excellent line (0.5 µV/V) and load (0.1 mV) regulation.

Pin Configuration and Functions

• Pin 1 (IN): Input voltage supply pin. Connect to a 1.8V to 20V source with a bypass capacitor.
• Pin 2 (OUT): Regulated output voltage pin. Provides adjustable output from 0V to 15V.
• Pin 3 (ADJ): Adjust pin. Used to set the output voltage via an external resistor divider.
• Pin 4 (GND): Ground reference pin. Connect to the system ground plane.
• Pin 5 (SHDN): Shutdown control pin. Drive low to disable output; pull high for normal operation.
• Pin 6 (PGFB): Power Good feedback pin. Monitors output voltage for power-good indication.
• Pin 7 (PG): Power Good output pin. Open-drain output indicating output voltage regulation status.
• Pin 8 (NC): No connect. Leave floating or connect to ground for thermal management.
• Pin 9 (NC): No connect. Leave floating or connect to ground for thermal management.
• Pin 10 (NC): No connect. Leave floating or connect to ground for thermal management.

Typical Applications

• RF and Wireless Systems: Powering low-noise amplifiers (LNAs) and VCOs in communication infrastructure.
• High-End Audio Equipment: Providing clean power rails for DACs and audio codecs to reduce distortion.
• Precision Instrumentation: Supplying low-noise voltage references and analog front-end circuits in test equipment.
• Data Converters: Driving ADC and DAC power supplies to minimize switching noise interference.
• Medical Imaging: Powering sensitive sensor arrays in ultrasound or MRI systems requiring ultra-low noise.

Equivalent / Alternative Parts