LT3041

RECOMMENDED FOR NEW DESIGNS

20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control

Analog Devices LT3041 Product Info

10 February 2026 6

Features

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

Part details & applications

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

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