Overview
The LT3045EDD#PBF is a high-performance low dropout linear regulator produced by Analog Devices Inc. This regulator is designed to provide ultralow noise and ultrahigh power supply rejection ratio (PSRR), making it ideal for powering noise-sensitive applications. It features a precision current reference followed by a high-performance voltage buffer, allowing for easy paralleling to reduce noise, increase output current, and distribute heat on the PCB.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Package Type | 10-Lead DFN EP |
| Output Current | 500 mA |
| Input Voltage Range | 0 V to 20 V |
| Output Voltage Range | 0 V to 15 V |
| Dropout Voltage | 260 mV (typical at 500 mA load) |
| Quiescent Current | 2.2 mA (typical at no load) |
| Operating Temperature Range | -40°C to 125°C |
| Protection Features | Reverse Polarity Protection, Short Circuit Protection, Thermal Protection |
| Output Noise Spectral Density | Very low, suitable for noise-sensitive applications |
| Minimum Output Capacitor | 10 µF Ceramic |
Key Features
- Ultralow Noise and Ultrahigh PSRR: Ideal for noise-sensitive applications such as RF power supplies, PLLs, VCOs, mixers, LNAs, and PAS.
- Adjustable Output Voltage: Output voltage can be adjusted from 0 V to 15 V.
- Programmable Current Limit: Allows for setting a specific current limit to protect the regulator and the system.
- Fast Start-Up Capability: Quickly reaches the desired output voltage, even with large output capacitors.
- Programmable Power Good: Indicates when the output voltage is within regulation limits.
- Thermal and Short Circuit Protection: Includes thermal shutdown and short circuit protection with foldback current limiting.
- Reverse Polarity and Reverse Current Protection: Protects against reverse battery and reverse current conditions.
Applications
- RF Power Supplies: Suitable for powering RF components such as PLLs, VCOs, mixers, LNAs, and PAS.
- Very Low Noise Instrumentation: Ideal for applications requiring minimal noise, such as precision measurement instruments.
- Post-Regulator for Switching Supplies: Can be used to clean up the output of switching power supplies, reducing noise and ripple.
Q & A
- What is the maximum output current of the LT3045EDD#PBF?
The maximum output current is 500 mA.
- What is the input voltage range for the LT3045EDD#PBF?
The input voltage range is from 0 V to 20 V.
- What is the typical dropout voltage of the LT3045EDD#PBF at 500 mA load?
The typical dropout voltage is 260 mV at a 500 mA load.
- Does the LT3045EDD#PBF have built-in protection features?
- What is the minimum output capacitor required for stability?
The minimum output capacitor required is 10 µF ceramic.
- Can the LT3045EDD#PBF be paralleled to increase output current?
- What is the operating temperature range of the LT3045EDD#PBF?
The operating temperature range is from -40°C to 125°C.
- Does the LT3045EDD#PBF have programmable current limit and power good features?
- What type of packages is the LT3045EDD#PBF available in?
- Is the LT3045EDD#PBF suitable for noise-sensitive applications?
