Overview

Features and Benefits

  • 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 15 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

Product Details

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 15 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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.