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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 750MA 10MSOP
- 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)：42V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：750mA
- Frequency - Switching：195kHz ~ 2.15MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：10-MSOP-EP
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Overview
The LT3973IMSE-3.3#PBF is a monolithic buck switching regulator from Analog Devices Inc., designed for industrial applications. It features an adjustable frequency range and accepts a wide input voltage range up to 42V. The device delivers a fixed output voltage of 3.3V with a maximum output current of 0.75A. It operates with a low quiescent current of 2.5uA. The component utilizes a 10-WFDFN package with an exposed pad, suitable for surface mount installation. It supports positive output configuration and functions as a synchronous rectifier.
Feature Summary
- Adjustable frequency operation for optimized efficiency
- Wide input voltage range capability up to 42V
- Low quiescent current consumption for power saving
- Monolithic buck topology with synchronous rectification
Applications
- Industrial control systems
- Automotive electronics
- General-purpose DC-DC conversion
Procurement Notes
Verify the exact part number suffix against official Analog Devices documentation to confirm the specific temperature grade and packaging variant. Ensure compatibility with the intended PCB footprint for the 10-WFDFN package. Cross-reference thermal requirements with system design constraints. Confirm availability through authorized distributors only.
Selection Notes
Select this component when a fixed 3.3V output is required with high input voltage tolerance. Consider the adjustable frequency feature for EMI management. Evaluate the 0.75A current limit against load requirements. The exposed pad design necessitates proper thermal management on the PCB substrate for optimal performance.
Part Context
This part belongs to the LT3973 family of step-down converters. Variants within the family offer different fixed output voltages or adjustable settings. The IMSE suffix typically denotes a specific temperature range and package type. Other models in the series may share similar electrical characteristics but differ in output specifications or thermal performance.
Replacement Considerations
Direct replacements include other LT3973 variants with compatible pinouts and electrical parameters. Verify that substitute parts match the 3.3V output requirement and 0.75A current capacity. Check for equivalent thermal resistance values in alternative packages.
