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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 20QFN
- 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-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The LT3741IUF#TRPBF is a high-power synchronous step-down DC/DC controller from Analog Devices, designed for constant current and constant voltage regulation. It operates with an input voltage range of 6V to 36V and supports output voltages from 4V to 34V. The device delivers up to 25A of output current with a fixed switching frequency of 1MHz. It features a low static current of 1.8mA and functions within a temperature range of -40°C to +125°C. Packaged in a 20-lead QFN (4x4) surface-mount format, it includes shutdown functionality for power management efficiency.
Feature Summary
- Synchronous buck topology for efficient step-down conversion
- Integrated constant current and constant voltage regulation modes
- Fixed 1MHz switching frequency for optimized external component size
- Shutdown pin for precise power control
Applications
- Battery charging systems requiring CC/CV profiles
- LED driver circuits for high-power illumination
- Industrial point-of-load regulation
- Telecommunications power supplies
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the I-grade designation meets the required industrial temperature specifications (-40°C to +125°C). Ensure the QFN-20 package footprint matches the PCB layout design. Cross-reference the datasheet revision to confirm electrical characteristics align with the intended application requirements before finalizing procurement.
Selection Notes
Select this controller for applications demanding high output currents up to 25A with precise regulation. The 1MHz frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Consider the thermal performance of the QFN package for heat dissipation needs. Evaluate the input voltage range against the source supply to ensure compatibility. The integrated synchronous rectification reduces external component count and improves overall system efficiency.
Part Context
The LT3741 series represents Analog Devices' solution for high-current step-down applications. This specific model integrates the control logic for synchronous rectification, eliminating the need for external gate drivers. It is part of the PMIC category, focusing on power management ICs. The device complements other LT3741 variants by offering a specific package and grade configuration suitable for dense industrial designs.
Replacement Considerations
LT3741EUF#TRPBF offers identical electrical performance in a different package variant. LT3741IFE-1#PBF provides similar functionality but in a TSSOP package with potential pinout differences. Verify pin compatibility and thermal characteristics when substituting. Check datasheet revisions for any changes in recommended operating conditions or external component values.
