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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 350MA 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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
- Grade：-
- Qualification：-
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Overview
The LT3990IMSE-3.3#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., designed for high-voltage input applications up to 62V. It delivers a fixed 3.3V output at 350mA with an adjustable switching frequency range of 210kHz to 2.3MHz. The device features ultra-low quiescent current consumption of 2.5µA and operates within a junction temperature range of -40°C to 125°C. Packaged in a 16-lead MSOP with exposed pad, it integrates protection features including thermal shutdown and current limit.
Feature Summary
- Adjustable switching frequency allows optimization for efficiency or component size
- Ultra-low quiescent current minimizes power loss in standby modes
- Wide input voltage range supports diverse power supply architectures
- Integrated thermal and current protection ensures robust operation
Applications
- Industrial control systems requiring isolated or non-isolated DC-DC conversion
- Automotive electronics operating under wide input voltage variations
- Portable battery-powered devices needing extended runtime due to low quiescent current
- Telecommunications infrastructure power distribution networks
Procurement Notes
Verify the exact suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the IMSE grade meets your temperature and reliability requirements. Cross-reference the datasheet revision date to ensure compatibility with your design specifications. Check for any recent PCN notices regarding package or material changes before finalizing procurement.
Selection Notes
Select this part when a fixed 3.3V output is required without external feedback resistors. Choose the IMSE variant for industrial temperature range compliance. Ensure the chosen switching frequency aligns with inductor saturation current and EMI constraints. Verify that the 350mA load current does not exceed the device's thermal limits under worst-case ambient conditions.
Part Context
This component belongs to the LT3990 family of high-voltage buck regulators. It shares core architecture with variants like LT3990EMSE (adjustable output) and LT3990IMSE-5 (fixed 5V output). The IMSE-3.3 specifically provides a fixed 3.3V rail, simplifying design for standard logic levels while maintaining the family’s wide input voltage capability and low quiescent current characteristics.
Replacement Considerations
LT3990IMSE-5#PBF offers a fixed 5V output instead of 3.3V. LT3990EMSE#TRPBF provides an adjustable output voltage via external resistors. LT3970IDDB-3.3#TRMPBF is a lower voltage version rated for 40V input. All share similar pinouts but differ in output configuration or input voltage rating.
