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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 20QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The LT3741EUF#PBF is a synchronous step-down DC/DC controller from Analog Devices Inc., housed in a 20-WFQFN (4x4) package. It operates with an input voltage range of 6V to 36V and supports a switching frequency between 200kHz and 1MHz. The device regulates positive output voltages up to 34V, capable of driving external MOSFETs for currents up to 25A. Key electrical parameters include a quiescent current of 1.8mA and a junction temperature operating range of -40°C to +125°C.
Feature Summary
- Synchronous buck topology with integrated high-side and low-side gate drivers
- Constant current and constant voltage regulation modes for battery charging applications
- Programmable switching frequency and soft-start functionality
- Clock synchronization capability for noise reduction in multi-phase systems
Applications
- High-power battery chargers
- LED driver circuits
- Point-of-load regulation modules
- Industrial power supply systems
Procurement Notes
Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the E-grade temperature rating matches system requirements. Ensure the 20-QFN footprint aligns with PCB layout capabilities. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.
Selection Notes
Select this component for applications requiring precise current regulation and high efficiency. Consider the 20-QFN package size for space-constrained designs. Evaluate the thermal performance given the exposed pad requirement. Compare against fixed-frequency variants if programmability is not required.
Part Context
This part belongs to the LT3741 family of high-power synchronous step-down controllers. It shares functional similarities with the LT3741-1 but differs in internal reference settings. The EUF designation specifies the commercial temperature grade and QFN package type within the broader product line.
Replacement Considerations
Direct substitutes include the LT3741EUF#TRPBF for tape-and-reel packaging needs. The LT3741IUF#PBF offers industrial temperature grading. Verify pin-to-pin compatibility and thermal characteristics before substitution.
