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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 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)：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 ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3481EDD#TRPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 2.7V to 36V and delivers up to 2A of output current. The device integrates a 2.8MHz fixed-frequency oscillator, allowing for the use of small external inductors and capacitors. Key electrical parameters include a quiescent current of 50µA, an adjustable output voltage range from 0.8V to 36V, and a shutdown supply current of less than 1µA. It features cycle-by-cycle current limit protection and thermal shutdown.
Feature Summary
- Integrates high-side and low-side power switches for efficient synchronous rectification
- Fixed 2.8MHz switching frequency minimizes external component size
- Includes programmable soft-start to limit inrush current during startup
- Provides cycle-by-cycle current limiting and thermal shutdown protection
Applications
- Point-of-load regulation for digital signal processors
- Battery-powered portable equipment requiring high efficiency
- Industrial control systems with wide input voltage ranges
- Communication infrastructure power supplies
Procurement Notes
Verify the specific suffix TRPBF indicates tape and reel packaging with lead-free finish. Confirm the DFN-10 package dimensions match your PCB footprint requirements. Check for RoHS compliance documentation if required by your manufacturing standards. Ensure the operating temperature range meets your environmental specifications.
Selection Notes
Select this component when a compact solution is needed for converting higher voltages to lower logic levels. The 2.8MHz frequency allows for smaller passive components compared to lower frequency regulators. Consider the 2A current capability against your peak load requirements. Evaluate the thermal performance in your enclosure design due to the integrated power switches.
Part Context
This part belongs to the LT348x family of micropower switching regulators designed for space-constrained applications. It shares architectural similarities with the LT3480 but offers a slightly higher switching frequency. The family targets applications requiring high efficiency and minimal board area.
Replacement Considerations
LT3480EDD#TRPBF: Similar 36V, 2A buck regulator but with 2.4MHz frequency. LT3680EDD#TRPBF: Higher current (3.5A) version with similar voltage ratings. LT3481EFE#TRPBF: Same electrical performance in TSSOP-16 package instead of DFN.
