LT3990 Overview
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. A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry.
Key Features
- Wide Input Voltage Range: 4.2V to 62V Operating
- Adjustable Switching Frequency: 200kHz to 2.2MHz
- Integrated Boost and Catch Diodes n 350mA Output Current
- Fixed Output Voltages: 3.3V, 5V 2µA IQ at 12VIN
- Accurate Programmable Undervoltage Lockout
- FMEA Fault Tolerant (MSOP Package) Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin is Left Floating
- Low Shutdown Current: IQ = 0.7µA
- Internal Sense Limits Catch Diode Current
- Power Good Flag
- Small, Thermally Enhanced 16-Pin MSOP and (3mm × 3mm) DFN Packages
