Overview
The LT3045IDD#TRPBF is a high-performance, low dropout (LDO) linear regulator produced by Analog Devices Inc.. Designed for applications requiring ultra-low noise, high PSRR (Power Supply Rejection Ratio), and precise output voltage regulation, this LDO regulator is ideal for powering sensitive analog circuits such as RF, PLLs, and ADCs. Its advanced architecture and robust design make it a top choice for industrial, automotive, and telecommunications applications.
Targeted at engineers and designers working on noise-sensitive systems, the LT3045IDD#TRPBF stands out for its exceptional noise performance, low dropout voltage, and ease of use. Its unique selling points include a wide input voltage range, adjustable output voltage, and thermal protection, making it a versatile and reliable solution for demanding power management tasks.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Input Voltage Range | 1.8 to 20 | V | |
| Output Voltage Range | 0 to 15 | V | Adjustable |
| Output Current | 500 | mA | |
| Dropout Voltage | 260 | mV | At 500 mA |
| Noise Voltage | 0.8 | µV RMS | 10 Hz to 100 kHz |
| PSRR | 76 | dB | At 1 MHz |
| Operating Temperature Range | -40 to 125 | °C | |
| Package | DFN-8 | 3 mm x 3 mm | |
| Quiescent Current | 20 | µA | |
| Thermal Resistance | 35 | °C/W | Junction to Case |
Key Features
- Ultra-low noise performance for sensitive analog circuits.
- High PSRR ensures stable output under varying input conditions.
- Wide input and output voltage range for versatile applications.
- Adjustable output voltage for precise regulation.
- Low dropout voltage maximizes efficiency.
- Compact DFN-8 package saves board space.
- Thermal protection enhances reliability in high-temperature environments.
Applications
The LT3045IDD#TRPBF is widely used in applications requiring clean and stable power, such as:
- Industrial Automation: Powering sensors, ADCs, and control systems.
- Telecommunications: Supplying low-noise power to RF and PLL circuits.
- Automotive Electronics: Ensuring reliable operation of infotainment and ADAS systems.
- Medical Devices: Providing precise voltage regulation for diagnostic equipment.
- Consumer Electronics: Enhancing performance of audio and video systems.
Q & A
1. What is the input voltage range of the LT3045IDD#TRPBF?
The input voltage range is 1.8 V to 20 V.
2. Can the output voltage be adjusted?
Yes, the output voltage is adjustable from 0 V to 15 V.
3. What is the maximum output current?
The maximum output current is 500 mA.
4. How does the LT3045IDD#TRPBF achieve low noise?
It uses a proprietary architecture to achieve ultra-low noise of 0.8 µV RMS.
5. What is the PSRR of this LDO regulator?
The PSRR is 76 dB at 1 MHz.
6. Is the LT3045IDD#TRPBF suitable for automotive applications?
Yes, it is designed to meet the rigorous demands of automotive electronics.
7. What package does the LT3045IDD#TRPBF come in?
It comes in a compact DFN-8 package measuring 3 mm x 3 mm.
8. Does it have thermal protection?
Yes, it includes thermal protection to ensure safe operation in high-temperature environments.
9. What is the dropout voltage at 500 mA?
The dropout voltage is 260 mV at 500 mA.
10. What is the quiescent current of the LT3045IDD#TRPBF?
The quiescent current is 20 µA.
