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Product Detailed Parameters
- Description：IC REG BUCK ADJ 5A 16MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.197V
- Voltage - Output (Max)：38.8V
- Current - Output：5A
- Frequency - Switching：200kHz ~ 2.25MHz
- 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 LT3976HMSE#PBF is a step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range up to 40V and delivers a continuous output current of 5A. The device integrates a 2MHz fixed switching frequency, which allows for the use of small external components while maintaining high efficiency across various load conditions. It features a low quiescent current of 3.3µA during operation and significantly lower current in shutdown mode. The component is housed in a thermally enhanced MSOP-10 package designed for surface-mount applications.
Feature Summary
- Integrates a power switch capable of delivering 5A continuous output current
- Features a fixed 2MHz switching frequency for compact passive component selection
- Includes internal compensation to simplify external circuit design
- Supports cycle-by-cycle current limiting and thermal protection
Applications
- Point-of-load regulation for industrial equipment
- Power supply stages for embedded computing systems
- Battery-powered devices requiring efficient voltage conversion
- Telecommunications infrastructure power distribution
Procurement Notes
Verify the specific suffix HMSE against the official datasheet to confirm the package type and temperature rating. Ensure compatibility with the required thermal management solution given the power dissipation characteristics. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement specifications.
Selection Notes
Select this component when a high-current buck converter is needed with minimal external component count. The fixed 2MHz frequency is suitable for space-constrained designs. Evaluate the thermal performance requirements based on the expected input-output voltage differential and load current to determine if additional heatsinking is necessary for the MSOP-10 package.
Part Context
This part belongs to the LT3976 family of high-efficiency step-down regulators from Analog Devices. It is designed to replace older linear regulators or slower switching converters in applications requiring higher current density. The series is characterized by its robust protection features and ease of implementation in dense PCB layouts.
Replacement Considerations
LT3975HMSE#PBF offers similar functionality with a 2.5A output current limit. LT3995HMSE#PBF provides a 60V input capability with a 3A output current. Verify pinout compatibility and thermal requirements when substituting these variants.
