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Product Detailed Parameters
- Description：IC REG BUCK 5V 350MA 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4.2V
- Voltage - Input (Max)：62V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：350mA
- Frequency - Switching：210kHz ~ 2.3MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：16-MSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3990IMSE-5#PBF is a monolithic buck switching regulator from Analog Devices, housed in a 16-lead MSOP package with an exposed pad. It delivers a fixed 5V output at up to 350mA. The device accepts input voltages from 4V to 62V and operates within a temperature range of -40°C to +125°C. Key electrical specifications include a quiescent current of 2.5µA, a shutdown supply current of 1.7µA, and an adjustable switching frequency up to 2.3MHz.
Feature Summary
- Supports wide input voltage ranges up to 62V for flexible power system integration
- Features ultra-low quiescent current consumption for efficient battery-powered applications
- Includes internal compensation to simplify external component selection
- Offers adjustable switching frequency to optimize performance across various load conditions
Applications
- Industrial control systems requiring high-voltage step-down conversion
- Battery-operated equipment needing extended standby life
- Automotive electronics operating under varying line conditions
- Portable instrumentation utilizing compact power solutions
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the MSOP-16 package dimensions match your PCB footprint requirements. Ensure the fixed 5V output aligns with your target load voltage needs. Check for any recent manufacturing changes or obsolescence notices from Analog Devices.
Selection Notes
Select this part when a fixed 5V output is required without external feedback resistors. Consider the 350mA limit against maximum load demands. Evaluate the 62V input capability against source voltage peaks. Compare the 2.5µA quiescent current against other regulators if ultra-low power is critical.
Part Context
This component belongs to the LT3990 family of high-voltage buck converters. It shares core architecture with adjustable variants like the LT3990EMSE but provides a fixed output voltage. The IMSE designation specifies the industrial temperature grade and MSOP packaging format used in space-constrained designs.
Replacement Considerations
Direct substitutes include other LT3990 variants with different output voltages or packages. Verify pin compatibility and thermal performance when replacing with similar high-voltage buck regulators from Analog Devices or competitors.
