Features

• Greatly Reduced Conducted and Radiated EMI (<100µVP-P in Typical Application)
• Low Switching Harmonic Content
• Independent Control of Switch Voltage and Current Slew Rates
• Two 1A Current Limited Power Switches
• Regulates Positive and Negative Voltages
• 20kHz to 250kHz Oscillator Frequency
• Easily Synchronized to External Clock
• Wide Input Voltage Range: 2.7V to 23V
• Low Shutdown Current: 12µA Typical
• Easier Layout than with Conventional Switchers
• Outputs Can Be Forced to 50% Duty Cycle for Unregulated Applications

Typical Application

Applications

• Precision Instrumentation Systems
• Isolated Supplies for Industrial Automation
• Medical Instruments
• Wireless Communications
• Single Board Data Acquisition Systems

Packaging

Datasheet

• LT1533 - Ultralow Noise1A Switching Regulator

Spec Notice

• LT1533 - SPECIFICATION NOTICE

Application Note

• AN118 - High Voltage, Low Noise, DC/DC Converters
• AN70 - A Monolithic Switching Regulator with 100µV Output Noise
• AN75 - Circuitry for Signal Conditioning and Power Conversion
• AN84 - Linear Technology Magazine Circuit Collection, Volume IV
• AN90 - Current Sources for Fiber Optic Lasers: A Compendium of Pleasant Current Events
• AN94 - Slew Rate Verification for Wideband Amplifiers: The Taming of the Slew

Design Note

• DN175 - Off-Line Low Noise Power Supply Does Not Require Filtering to Meet FCC Emission Requirements

Reliability Data

• R386 Reliability Data

LT Journal

• Feb 1998 LT1533 Ultralow Noise Switching Regulator for High Voltage or High Current Applications

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