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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 350MA 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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)：3.3V
- 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
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Overview
The LT3990EMSE-3.3#TRPBF is a fixed-output synchronous step-down switching regulator manufactured by Analog Devices Inc. It provides a stable 3.3V output with a maximum current of 350mA. The device accepts an input voltage range from 4.2V to 62V and operates with a programmable switching frequency between 210kHz and 2.3MHz. It features low quiescent current consumption of 2.5µA and includes internal power switches, eliminating the need for external diodes. The component is housed in a 16-lead MSOP package with an exposed pad for thermal management.
Feature Summary
- Integrated synchronous rectification with internal high-side and low-side power switches
- Programmable switching frequency allows optimization for efficiency or component size
- Low quiescent current operation supports extended battery life in portable applications
- Wide input voltage range accommodates various supply sources including automotive systems
Applications
- Battery-powered portable equipment requiring efficient voltage regulation
- Automotive electronics operating within wide input voltage ranges
- Industrial control systems needing isolated or non-isolated DC-DC conversion
- Communication infrastructure power distribution networks
Procurement Notes
Verify the exact part number suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the temperature grade corresponds to your operational requirements. Ensure compatibility with your PCB footprint for the 16-MSOP-EP package. Check for any recent product change notices regarding material declarations or marking changes before finalizing procurement.
Selection Notes
Select this component when a fixed 3.3V output is required without external feedback resistors. Consider the 350mA current limit for load requirements. Evaluate the thermal performance given the exposed pad design. Compare against adjustable variants if flexible output voltages are needed later in the design cycle.
Part Context
This part belongs to the LT3990 family of monolithic buck regulators designed for high-voltage input applications. The EMSE variant specifies the commercial temperature range and MSOP package. The -3.3 suffix denotes the fixed 3.3V output version, distinguishing it from adjustable or other fixed voltage options within the same series.
Replacement Considerations
Direct substitutes include other LT3990 variants with different output voltages or packages. Verify pinout compatibility before replacing with similar high-voltage buck converters from other manufacturers. Ensure thermal characteristics match the original design constraints.
