LT83201 Datasheet

• 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)

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

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.