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Product Detailed Parameters
- Description：IC SYNCHRONOUS FWRD CTRLR 20SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：-
- Function：-
- Output Configuration：-
- Topology：-
- Number of Outputs：-
- Output Phases：-
- Voltage - Supply (Vcc/Vdd)：-
- Frequency - Switching：-
- Duty Cycle (Max)：-
- Synchronous Rectifier：-
- Clock Sync：-
- Serial Interfaces：-
- Control Features：-
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SO
- Grade：-
- Qualification：-
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Overview
The LT1681ESW#PBF is a monolithic DC/DC controller manufactured by Analog Devices Inc., designed for forward converter topologies. It operates with an input voltage range of 9V to 72V and supports a maximum output current of 20A. The device features a fixed switching frequency of 350kHz and delivers a typical output power of 300W. It functions within an operating temperature range of -40°C to 85°C, utilizing a 20-pin SOIC package with a width of 7.50mm. The controller draws an operating supply current of 17mA.
Feature Summary
- Supports forward converter topology with single output configuration
- Wide input voltage capability from 9V to 72V
- Fixed 350kHz switching frequency operation
- Capable of driving loads up to 20A output current
Applications
- Industrial power supplies
- Telecommunications equipment
- Point-of-load conversion systems
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix #PBF indicates lead-free packaging compliance. Ensure the 20-SOIC package dimensions match the target PCB footprint. Validate that the 350kHz frequency aligns with system electromagnetic interference requirements. Check for any regional distribution restrictions before finalizing procurement plans.
Selection Notes
Select this controller when a robust forward converter solution is required for high-voltage inputs up to 72V. The 350kHz frequency offers a balance between efficiency and component size. Ensure the design accommodates the 20A output capability and 300W power handling. Consider thermal management strategies given the SOIC-20 package constraints. Verify compatibility with external drive components for optimal performance at the specified operating temperatures.
Part Context
This component belongs to the LT1681 series of DC/DC switching controllers. It is part of Analog Devices' portfolio of power management integrated circuits. The ES designation typically refers to the extended temperature grade variant. The SW suffix indicates the SOIC-20 surface-mount package style. This family targets applications requiring reliable isolated power conversion in industrial environments.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate cross-reference options based on pinout compatibility, electrical specifications, and package dimensions. Consult official Analog Devices resources for potential alternative devices within the same product family.
