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Product Detailed Parameters
- Description：IC SYNCHRONOUS FWRD CTRLR 20SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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：-
Download product information
Overview
The LT1681ISW#TRPBF is a dual transistor synchronous forward controller manufactured by Analog Devices Inc. It operates within an input voltage range of 9 V to 72 V and supports current-mode control with constant frequency techniques. The device is housed in a 20-SOIC package (0.295 inch, 7.50 mm width) designed for surface mount installation. It functions as a DC-DC switching regulator controller suitable for robust power supply applications. The component is rated for operation across a temperature range of -40°C to +85°C and complies with RoHS3 standards.
Feature Summary
- Dual transistor architecture enables efficient synchronous rectification control for forward converter topologies.
- Current-mode control technique ensures stable regulation under varying load conditions.
- Integrated protection features support reliable operation in demanding industrial environments.
Applications
- Industrial power supply systems requiring isolated DC-DC conversion
- Telecommunications equipment power distribution modules
- Automotive electronics power management units
Procurement Notes
Verify the specific ordering suffix #TRPBF confirms tape and reel packaging quantity of 1,000 units per manufacturer standard. Ensure compatibility with 20-SOIC footprint requirements during PCB layout. Confirm RoHS3 compliance status matches project environmental specifications. Cross-reference the active part status with current availability from authorized distributors to avoid obsolescence risks.
Selection Notes
Select this controller when designing synchronous forward converters requiring wide input voltage ranges up to 72 V. The dual-channel output capability simplifies design for high-efficiency applications compared to asynchronous alternatives. Consider the 20-SOIC package size for thermal management and board space constraints. Validate that current-mode control aligns with the desired transient response characteristics of the target power stage.
Part Context
The LT1681 belongs to the Linear Technology (now Analog Devices) family of switching regulators. This specific model focuses on synchronous forward control, distinguishing it from other topologies like buck or boost controllers. The ISW variant indicates industrial temperature rating and SOIC packaging. It serves as a core component for generating regulated voltages in multi-rail systems.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify functional pinout and electrical parameter compatibility before considering any alternative components from different manufacturers.
