LT3041
LT3041
RECOMMENDED FOR NEW DESIGNS20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control
- Part Models
- 2
- 1ku List Price
- Starting From $4.57
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Overview
- Ultra-low output RMS noise: 1.0 μV rms (10 Hz to 100 kHz)
- Ultra-low output noise spectral density: 3 nV/√Hz at 10 kHz
- Ultra-low 1/f noise: 8 μV p-p (0.1 Hz to 10 Hz)
- Ultra-high PSRR: 80 dB at 1 MHz
- Output current: 1 A
- Wide input voltage range: 2.2 V to 20 V
- Single capacitor improves noise and PSRR
- SET pin current: 100 μA, ±0.5% initial accuracy
- VIOC pin to manage power dissipation
- Single resistor programs output voltage
- Programmable current limit
- Low-dropout voltage: 310 mV
- Output voltage range: 0.2 V to 19 V
- Programmable power good
- Fast start-up capability
- Precision enable/UVLO
- Parallelable for lower noise and higher current
- Internal current limit with foldback
- Minimum output capacitor: 2 parallel 10 μF ceramic
- Compact, low profile, 14-lead, 4 mm × 3 mm, DFN package
The LT3041 is a high-performance, low-dropout linear regulator featuring Analog Devices, Inc., ultra-low noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sensitive applications. Designed as a precision-current reference followed by a high-performance voltage buffer, the LT3041 can be easily paralleled to further reduce noise, increase output current, and spread heat on the printed circuit board (PCB).
The LT3041 supplies 1 A at a typical 310 mV dropout voltage. The operating quiescent current is nominally 4.3 mA and drops to 18 μA in shutdown. The wide output voltage range (0.2 V to 19 V) of the LT3041 maintained by the unity-gain operation provides virtually constant output noise, PSRR, bandwidth, and load regulation, independent of the programmed output voltage. Additionally, the regulator features VIOC, programmable current limit, fast start-up capability, and programmable power good to indicate output-voltage regulation.
Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback, and thermal limit with hysteresis. The LT3041 is available in a thermally enhanced, 14-lead 4 mm × 3 mm, DFN package.
APPLICATIONS
- RF power supplies: phase-locked loops, voltage-controlled oscillators, mixers, low-noise amplifiers, and power amplifiers
- Low-noise instrumentation
- High-speed and high-precision data converters
- Medical applications: imaging and diagnostics
- Postregulator for switching supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 3
Brochure 1
Analog Dialogue 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3041ADE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LT3041ADE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 1
Models for the following parts are available in LTspice:
- LT3041
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Evaluating the LT3041 20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control