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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3.5A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：33V
- Voltage - Output (Min/Fixed)：0.79V
- Voltage - Output (Max)：30V
- Current - Output：3.5A
- Frequency - Switching：230kHz ~ 2.45MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3972IDD#TRPBF is a high-efficiency, monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6 V to 33 V and delivers up to 3.5 A of output current. The device features a fixed switching frequency of 2.45 MHz, enabling the use of small external components. It supports adjustable output voltages from 790 mV to 30 V. Key electrical specifications include a quiescent current of 75 µA during operation and 30 µA in shutdown mode. The component is housed in a thermally enhanced 10-lead DFN package and is rated for operation between -40°C and +125°C.
Feature Summary
- Integrated synchronous rectification architecture for high efficiency across load ranges
- Fixed 2.45 MHz switching frequency minimizes external passive component size
- Low quiescent current consumption reduces power loss in standby modes
- Wide input voltage capability accommodates various supply rail configurations
Applications
- Industrial control systems requiring isolated or non-isolated DC-DC conversion
- Point-of-load regulation for microprocessors and FPGAs
- Battery-powered equipment with wide input voltage variations
- Embedded computing modules needing compact power solutions
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. to ensure authenticity. Check RoHS compliance status via official documentation. Validate the part number against the latest datasheet revision to avoid obsolete variants. Ensure the supplier provides traceability certificates if required for your application.
Selection Notes
Select this component when a wide input voltage range up to 33 V is required alongside high output current. The fixed 2.45 MHz frequency is suitable for designs prioritizing small footprint over ultra-low noise. Compare quiescent current requirements against other buck regulators if battery life is critical. Ensure the thermal performance of the DFN package meets the system's heat dissipation needs under maximum load conditions.
Part Context
This part belongs to the LT3972 family of synchronous buck converters designed for industrial and communication applications. It shares architectural similarities with other high-voltage buck regulators but offers specific current and frequency characteristics. The IDD variant denotes the specific package and temperature grade configuration within the product line.
Replacement Considerations
LT3972IDD#PBF is the tube-packaged equivalent of this component. Verify pinout compatibility and thermal pad requirements when substituting between reel and tube packages. No direct functional replacements are confirmed in the provided data.
