Overview
The LT3045IDD#PBF is a high-performance low dropout (LDO) linear regulator produced by Analog Devices Inc. This regulator is designed with LTC's ultralow noise and ultrahigh power supply rejection ratio (PSRR) architecture, making it ideal for powering noise-sensitive applications. It operates as a precision current reference followed by a high-performance voltage buffer, allowing it to be easily paralleled to reduce noise, increase output current, and distribute heat on the PCB. The device can supply up to 500mA with a typical dropout voltage of 260mV and maintains a wide output voltage range of 0V to 15V.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Type | LDO | |
| Number of Outputs | 1 | |
| Polarity | Positive | |
| Accuracy (%) | ±1 | |
| Output Type | Adjustable | |
| Output Voltage (V) | 0 to 15 | |
| Maximum Output Current (A) | 0.5 | |
| Minimum Input Voltage (V) | 1.8 | |
| Maximum Input Voltage (V) | 20 | |
| Maximum Dropout Voltage @ Current (V) | 0.275@1mA, 0.28@50mA, 0.28@300mA, 0.35@500mA | |
| Line Regulation | 3µV/V | |
| Load Regulation | 3nA (Typ) | |
| Typical Ground Current @ Full Load (mA) | 15 | |
| Junction to Ambient (°C/W) | 34 | |
| Junction to Case (°C/W) | 5.5 | |
| Minimum Operating Temperature (°C) | -40 | |
| Maximum Operating Temperature (°C) | 125 | |
| Supplier Temperature Grade | Industrial | |
| Package Type | DFN EP | |
| Pin Count | 12 |
Key Features
- Ultralow Noise and Ultrahigh PSRR: The LT3045IDD#PBF features LTC's ultralow noise and ultrahigh PSRR architecture, making it suitable for noise-sensitive applications.
- Adjustable Output Voltage: The output voltage can be adjusted from 0V to 15V, providing flexibility for different circuit requirements.
- Low Dropout Voltage: The regulator has a minimal dropout voltage of 0.275V at 1mA load and up to 0.35V at 500mA, ensuring efficient operation even with small voltage differences.
- Programmable Current Limit: The device includes a programmable current limit feature to protect against excessive currents.
- Fast Start-Up Capability: It features fast start-up capability and programmable power good to indicate output status.
- Wide Operating Temperature Range: The regulator operates from -40°C to 125°C, making it suitable for a broad range of environments and applications.
- Protection Features: Includes reverse battery protection, reverse current protection, and thermal shutdown to safeguard the regulator from potential damage.
Applications
- RF Power Supplies: Ideal for powering PLLs, VCOs, mixers, LNAs, and PAs, where low noise and stable output are crucial.
- Very Low Noise Instrumentation: Provides clean, stable power for sensitive instrumentation requiring minimal noise interference.
- High-Speed/High-Precision Data Converters: Ensures accurate data conversion with its precise voltage regulation.
- Medical Applications: Perfect for imaging and diagnostic equipment that demands reliable and consistent power.
- Precision Power Supplies: Delivers accurate voltage to critical circuits and devices.
- Post-Regulator for Switching Supplies: Enhances performance by providing a stable output after initial switching regulation.
Q & A
- What is the maximum output current of the LT3045IDD#PBF?
The maximum output current is 500mA.
- What is the typical dropout voltage of the LT3045IDD#PBF at full load?
The typical dropout voltage at full load (500mA) is 260mV.
- What is the operating temperature range of the LT3045IDD#PBF?
The operating temperature range is from -40°C to 125°C.
- Does the LT3045IDD#PBF have programmable current limit?
- What are the key protection features of the LT3045IDD#PBF?
The regulator includes reverse battery protection, reverse current protection, and thermal shutdown.
- Can the LT3045IDD#PBF be used in medical applications?
- What is the typical ground current at full load for the LT3045IDD#PBF?
The typical ground current at full load is 15mA.
- How does the LT3045IDD#PBF handle noise in sensitive applications?
- Can the LT3045IDD#PBF be used as a post-regulator for switching supplies?
- What is the package type of the LT3045IDD#PBF?
