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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 ~ 150°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 LT3990HMSE-5#PBF is a monolithic synchronous buck switching regulator from Analog Devices, housed in a 16-lead MSOP package. It delivers a fixed 5V output with a maximum current of 350mA. The device accepts an input voltage range from 4V to 62V and operates at a switch frequency of 2.3MHz. Quiescent current is specified at 2.5µA, dropping to 1.7µA during shutdown. It functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrated synchronous rectification for high efficiency across the load range
- Wide input voltage capability supporting high-voltage distribution systems
- Ultra-low quiescent current consumption for extended battery life
- Adjustable switching frequency allows optimization for size or noise
Applications
- Industrial control systems requiring isolated power rails
- Automotive electronics operating on 12V or 24V networks
- Battery-powered equipment needing efficient step-down conversion
- Embedded systems with strict space constraints
Procurement Notes
Verify the specific suffix #PBF confirms lead-free compliance and RoHS standards before procurement. Confirm the MSOP-16 package dimensions match your PCB footprint requirements. Ensure the 62V absolute maximum rating aligns with your system's transient voltage conditions to prevent device damage.
Selection Notes
Select this component when a fixed 5V output is required without external feedback resistors. It is suitable for designs prioritizing low standby power due to its microampere quiescent current. Consider the thermal performance in the MSOP-16 package if continuous 350mA loads are expected in enclosed environments.
Part Context
This part belongs to the LT3990 family of high-voltage synchronous buck regulators. The 'H' grade indicates extended industrial temperature performance. The 'MSE' designation specifies the 16-lead MSOP package type. The '-5' suffix denotes the fixed 5V output voltage variant within the series.
Replacement Considerations
LT3990EMSE-5#PBF offers similar electrical characteristics but may differ in temperature grading or manufacturing lot specifications. Verify pin compatibility and thermal resistance values when substituting to ensure circuit stability.
