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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 LT3741IUF#PBF is a fixed-frequency synchronous step-down DC/DC controller from Analog Devices. It regulates output current up to 25A with an input voltage range of 6V to 36V and an output voltage range of 4V to 34V. The device operates at a switching frequency of 1MHz, drawing a static current of 1.8mA. It supports shutdown functionality and functions within a temperature range of -40°C to +125°C. The component is housed in a QFN-20 package.
Feature Summary
- Synchronous buck controller topology for high-power constant current and constant voltage regulation
- Integrated shutdown pin for power management control
- Fixed 1MHz switching frequency operation
Applications
- High power LED driver circuits
- Battery charging systems
- Industrial power supplies
Procurement Notes
Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the QFN-20 package type matches the PCB footprint requirements. Ensure the operating temperature range meets the environmental specifications of the final application. Cross-reference the manufacturer part number with official Analog Devices documentation to avoid counterfeit components.
Selection Notes
Select this model for applications requiring precise current regulation up to 25A. The 1MHz frequency allows for smaller external passive components compared to lower frequency alternatives. Consider the thermal performance of the QFN-20 package for heat dissipation needs. Evaluate the 6V to 36V input range against the system's supply voltage variations.
Part Context
This component belongs to the LT3741 family of high-power step-down controllers. It shares functional similarities with the LT3741IFE-1#PBF but differs in package style and switching frequency. The IUF variant specifically utilizes a QFN-20 package and operates at 1MHz, distinguishing it from other family members like the LT3741IUF-1#PBF which may have different electrical characteristics or suffixes.
Replacement Considerations
LT3741IUF-1#PBF
FAQ
What is the maximum output current capability?
The LT3741IUF#PBF is designed to accurately regulate output current up to 25A.
Does the device support shutdown mode?
Yes, the controller includes a shutdown feature for power management.
