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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：34V
- Voltage - Output (Min/Fixed)：1.265V
- Voltage - Output (Max)：20V
- Current - Output：2A
- Frequency - Switching：300kHz ~ 2.8MHz
- 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 LT3481IDD#PBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It accepts input voltages up to 36V and delivers an adjustable output current of 2A. The device operates at a fixed switching frequency of 2.8MHz, enabling the use of small external components. It features a low quiescent current of 50µA and includes internal compensation for stability. The IC is housed in a 10-lead DFN package with an exposed pad for thermal dissipation.
Feature Summary
- Integrated high-side and low-side power switches for efficient synchronous rectification
- Fixed 2.8MHz switching frequency minimizes external component size
- Low 50µA quiescent current extends battery life in standby modes
- Internal frequency compensation simplifies design and ensures stability
Applications
- Portable instrumentation systems requiring compact power solutions
- Industrial control units operating from higher voltage buses
- Automotive electronics compatible with 36V input ranges
- Communication equipment needing low noise regulation
Procurement Notes
Verify the exact part number suffix against official Analog Devices documentation to confirm package type and temperature range. Ensure compatibility with your board's thermal design requirements due to the exposed pad configuration. Cross-reference datasheet revisions to confirm pinout consistency before finalizing procurement orders.
Selection Notes
Select this component when a 36V input range and 2A continuous output are required in a small footprint. The fixed 2.8MHz frequency is suitable for applications prioritizing size over ultra-low EMI. Consider thermal management strategies given the power density in the DFN package. Verify that the load transient requirements align with the internal compensation characteristics.
Part Context
This part belongs to the LT348x family of high-voltage buck regulators. It shares architectural similarities with the LT3480 but differs in switching frequency and quiescent current specifications. The IDD#PBF suffix indicates a lead-free, halogen-free RoHS-compliant version in a 10-lead DFN package with an exposed thermal pad.
Replacement Considerations
LT3480IDD#PBF offers similar functionality but operates at 2.4MHz with different quiescent current characteristics. LT3481EDD#PBF provides the same electrical performance in an enhanced DFN package for improved thermal handling. Verify pin-to-pin compatibility and thermal resistance values when substituting.
