LT83201

RECOMMENDED FOR NEW DESIGNS

18V, 1A Step-Down Silent Switcher 3 with Ultra-Low Noise Reference

Analog Devices LT83201 Product Info

10 February 2026 7

Features

Silent Switcher^® 3 Architecture

Ultra-Low RMS Noise (10Hz to 100kHz): 4μV_RMS
Ultra-Low Spot Noise: 4nV/√Hz at 10kHz
Ultra-Low EMI Emissions

Ultra-Fast Transient Response;

<1μs Transient Recovery Time

High Efficiency at High Frequency
Up to 94% Efficiency at 2MHz, 12V_IN to 5V_OUT
Up to 92% Efficiency at 4MHz, 12V_IN to 5V_OUT
Input Voltage Range: 2.8V to 18V
Output Voltage Range: 0V to (V_IN − 0.5V)

Unity Gain Configuration up to 13V Output

Maximum Continuous Output Current: 1A
Fast Minimum Switch On-Time: 13ns;
Adjustable and Synchronizable: 300kHz to 6MHz;
Precision Reference: ±0.6% Over Temperature with Remote Sense
Pin Selectable Forced Continuous Mode (FCM) or Discontinuous Conduction Mode (DCM) During Operation
Full Frequency Discontinuous Conduction at Light Loads in DCM for Higher Efficiency and Predictable Noise
Supports Dynamic Output Voltage Control
Programmable Power Good
Tiny 15-Lead 3mm × 2mm LFCSP Package;
Pin-to-Pin Compatible Family: LT83201 (1A), LT83203 (3A), LT83205 (5A)

Part details & applications

The LT^®83201 synchronous step-down regulator is uniquely designed to combine an ultra-low noise reference with Silent Switcher architecture to achieve both high efficiency and excellent wideband noise performance.

The innovative ultra-low noise architecture allows exceptional low-frequency (0.1Hz to 100kHz) output noise performance in a switching regulator. The output voltage can be programmed with a single resistor, resulting in virtually constant output noise independent of output voltage.

Silent Switcher architecture minimizes EMI emissions while delivering high efficiency at high switching frequencies.

The LT83201 is ideal for noise-sensitive applications which benefit from the high efficiency of a synchronous switching regulator.

APPLICATIONS

RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs
Low Noise Instrumentation
High Speed/High Precision ADCs/DACs
General Purpose Power Supply

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