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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：6V ~ 36V
- Frequency - Switching：200kHz ~ 1MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：20-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3741IFE#TRPBF is a fixed frequency synchronous step-down DC/DC controller designed for high-power applications. It regulates output current up to 20A with precision. The device operates within an input voltage range of 6V to 36V and supports switching frequencies from 200kHz to 1MHz. It features a 20-TSSOP-EP package with exposed pad for thermal management. Operating temperature range spans from -40°C to +125°C TJ. Static supply current is typically 1.8mA. The controller includes soft-start, enable, and frequency synchronization capabilities.
Feature Summary
- Synchronous buck topology with integrated control logic for efficient power conversion
- Constant current regulation capability for driving high-power loads such as LEDs
- Frequency synchronization pin allows external clocking to avoid noise interference
- Integrated soft-start function limits inrush current during startup
Applications
- High-power LED lighting drivers
- Industrial power supplies
- Battery-powered equipment requiring efficient step-down conversion
- General-purpose DC/DC converter designs
Procurement Notes
Verify the suffix TRPBF indicates tape and reel packaging versus tube packaging for standard IFE variants. Confirm RoHS compliance status through official Analog Devices documentation. Ensure the specific lot date code meets project requirements. Check for any recent product lifecycle changes or obsolescence notices. Validate that the exposed pad thermal design matches the target PCB layout specifications.
Selection Notes
Select this component when precise constant current regulation is required for high-current loads. The wide input voltage range suits various bus architectures. Synchronous rectification improves efficiency compared to asynchronous solutions. Frequency flexibility allows optimization for size or EMI performance. Consider thermal dissipation requirements due to high output current capability in the TSSOP package.
Part Context
This part belongs to the LT3741 family of high-power synchronous buck controllers. It shares architectural similarities with the LT3741-1 but differs in specific control parameters. The device complements other Linear Technology PMIC offerings for complete power management solutions. It is designed for use in demanding industrial and commercial environments requiring reliable power conversion.
Replacement Considerations
LT3741IFE#PBF serves as the tube-packaged equivalent. LT3741EFE#TRPBF offers an alternative package option. Verify pin compatibility and electrical specifications before substitution. Review updated datasheets for any functional differences between revisions.
