Overview
The LT3042EMSE#TRPBF is a high-performance low dropout 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 RF applications. It operates as a precision current reference followed by a high-performance voltage buffer and can be easily paralleled to reduce noise, increase output current, and distribute heat on the PCB. The device supplies up to 200mA with a typical dropout voltage of 350mV and features a wide output voltage range of 0V to 15V. It also includes programmable current limit, fast start-up capability, and programmable power good indication for output voltage regulation.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Regulators | 1 | |
| Maximum Input Voltage | 20 | V |
| Minimum Output Voltage | 0 | V |
| Maximum Output Voltage | 15 | V |
| Maximum Dropout Voltage | 0.35 | V @ 200mA |
| Output Current | 200 | mA |
| PSRR | 117dB to 56dB (120Hz to 10MHz) | |
| Operating Temperature Range | -40°C to 125°C | |
| Quiescent Current | 2mA (nominal), <1µA (shutdown) | |
| Minimum Output Capacitor | 4.7µF (ceramic) |
Key Features
- Ultralow noise output suitable for sensitive applications
- High PSRR for excellent line and load transient response
- Adjustable output voltage from 0V to 15V
- Programmable current limit and thermal overload protection
- Reverse polarity protection
- Fast start-up capability and programmable power good indication
- Exposed pad for efficient heat dissipation
- Stable with a minimum 4.7µF ceramic output capacitor
Applications
- Precision instrumentation
- Medical equipment: imaging, diagnostics
- High-end audio applications
- Sensitive RF supply lines
- Mixers, LNAs (Low Noise Amplifiers)
- High-speed/high-precision data converters
- Precision power supplies
- Post-regulator for switching supplies
Q & A
- What is the maximum output current of the LT3042EMSE#TRPBF?
The maximum output current is 200mA. - What is the typical dropout voltage of the LT3042EMSE#TRPBF?
The typical dropout voltage is 350mV. - What is the PSRR range of the LT3042EMSE#TRPBF?
The PSRR range is from 117dB to 56dB over the frequency range of 120Hz to 10MHz. - What is the operating temperature range of the LT3042EMSE#TRPBF?
The operating temperature range is -40°C to 125°C. - Can the LT3042EMSE#TRPBF be paralleled to increase output current?
Yes, the LT3042EMSE#TRPBF can be easily paralleled to further reduce noise, increase output current, and distribute heat on the PCB. - What type of protection features does the LT3042EMSE#TRPBF have?
The device includes reverse polarity protection, internal current limit with foldback, thermal limit with hysteresis, and over-temperature protection. - What is the minimum output capacitor required for stability?
The minimum output capacitor required for stability is 4.7µF (ceramic). - What are some common applications of the LT3042EMSE#TRPBF?
Common applications include precision instrumentation, medical equipment, high-end audio applications, and sensitive RF supply lines. - Is the LT3042EMSE#TRPBF suitable for high-fidelity systems?
Yes, it is exceptionally suitable for high-fidelity systems due to its ultralow noise performance. - What package types are available for the LT3042EMSE#TRPBF?
The device is available in thermally enhanced 10-Lead MSOP and 3mm × 3mm DFN packages.
