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LT3990 - 350mA Step-Down Regulator

Description

The LT®3990 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 62V, and consumes only 2.5µA of quiescent current.

Features

  • n Low Ripple Burst Mode® Operation 2.5µA IQ at 12VIN to 3.3VOUT Output Ripple < 5mVP-P n Wide Input Voltage Range: 4.2V to 62V Operating n Adjustable Switching Frequency: 200kHz to 2.2MHz n Integrated Boost and Catch Diodes n 350mA Output Current n Fixed Output Voltages: 3.3V, 5V 2µA IQ at 12VIN n Accurate Programmable Undervoltage Lockout n FMEA Fault Tolerant (MSOP Package) Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin is Left Floatin.

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Full PDF Text Transcription

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FEATURES n Low Ripple Burst Mode® Operation 2.5µA IQ at 12VIN to 3.3VOUT Output Ripple < 5mVP-P n Wide Input Voltage Range: 4.2V to 62V Operating n Adjustable Switching Frequency: 200kHz to 2.2MHz n Integrated Boost and Catch Diodes n 350mA Output Current n Fixed Output Voltages: 3.3V, 5V 2µA IQ at 12VIN n Accurate Programmable Undervoltage Lockout n FMEA Fault Tolerant (MSOP Package) Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin is Left Floating n Low Shutdown Current: IQ = 0.7µA n Internal Sense Limits Catch Diode Current n Power Good Flag n Small, Thermally Enhanced 16-Pin MSOP and (3mm × 3mm) DFN Packages APPLICATIONS n Automotive Battery Regulation n Power for Portable Products n Industrial Supplies LT3990/LT3990-3.
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