Overview
The LT3042IDD#TRPBF is a high-performance low dropout linear regulator (LDO) produced by Analog Devices Inc. This device is part of the LT3042 series, known for its ultralow noise and ultrahigh power supply rejection ratio (PSRR) architecture. It is designed to power noise-sensitive applications, particularly in RF environments. The regulator features a precision current reference followed by a high-performance voltage buffer, making it suitable for demanding applications such as mixers, low noise amplifiers (LNAs), high-speed data converters, and medical imaging equipment.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±22 | V |
| Output Current | 200 | mA |
| Dropout Voltage (Typical) | 350 | mV |
| Quiescent Current (Typical) | 2 | mA |
| Quiescent Current (Shutdown) | <1 | µA |
| PSRR at 120Hz | 80 | dB |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | 10-Lead (3mm × 3mm) Plastic DFN |
Key Features
- Ultralow noise and ultrahigh PSRR architecture, making it ideal for noise-sensitive RF applications.
- High performance voltage buffer for precise voltage regulation.
- Can be easily paralleled to reduce noise, increase output current, and spread heat on the PCB.
- Low dropout voltage of 350mV typical.
- Low quiescent current of 2mA typical, dropping to less than 1µA in shutdown.
- Internal current limit with foldback protection for VIN – VOUT differentials greater than 12V.
Applications
- Noise-sensitive RF applications such as mixers and low noise amplifiers (LNAs).
- High-speed and high-precision data converters.
- Medical applications including imaging and diagnostics.
- Precision power supplies.
- Post-regulator for switching supplies.
Q & A
- What is the typical output current of the LT3042IDD#TRPBF?
The typical output current is 200mA.
- What is the dropout voltage of the LT3042IDD#TRPBF?
The typical dropout voltage is 350mV.
- What is the quiescent current of the LT3042IDD#TRPBF in normal operation and shutdown?
The quiescent current is nominally 2mA in normal operation and less than 1µA in shutdown.
- What is the PSRR at 120Hz for the LT3042IDD#TRPBF?
The PSRR at 120Hz is 80dB.
- What is the operating temperature range of the LT3042IDD#TRPBF?
The operating temperature range is -40°C to 125°C.
- Can the LT3042IDD#TRPBF be paralleled to increase output current?
Yes, the LT3042IDD#TRPBF can be easily paralleled to reduce noise, increase output current, and spread heat on the PCB.
- What type of protection does the internal current limit of the LT3042IDD#TRPBF have?
The internal current limit has foldback protection for VIN – VOUT differentials greater than 12V.
- What is the minimum load current required for stability when the output voltage is less than 1V?
A minimum load current of 10µA is required for stability when the output voltage is less than 1V.
- What are some common applications of the LT3042IDD#TRPBF?
Common applications include noise-sensitive RF applications, high-speed and high-precision data converters, medical imaging and diagnostics, precision power supplies, and post-regulator for switching supplies.
- What is the package type of the LT3042IDD#TRPBF?
The package type is a 10-Lead (3mm × 3mm) Plastic DFN.
