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Product Detailed Parameters
- Description：IC REG BCK ADJ 2A/1A TRPL 28QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：3
- Voltage - Input (Min)：3.2V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：36V
- Current - Output：2A, 1A
- Frequency - Switching：270kHz ~ 2.1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (4x5)
- Grade：-
- Qualification：-
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Overview
The LT3514IUFD#PBF is a triple step-down switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 3.2V to 36V and provides three adjustable positive outputs. The device supports a switching frequency between 270kHz and 2.1MHz, allowing for optimized efficiency and component size. It features a 2A output capability on the primary channel and 1A on secondary channels. The unit is housed in a 24-lead TSSOP package with an exposed pad, designed for surface mount installation and rated for operation from -40°C to 125°C junction temperature.
Feature Summary
- Triple independent buck regulators with separate run pins
- Supports 100% duty cycle operation for low dropout performance
- Integrated soft-start functionality minimizes inrush current
- Capable of driving loads directly from battery sources
Applications
- Portable equipment requiring multiple voltage rails
- Industrial control systems with distributed power architectures
- Battery-powered devices utilizing single-cell lithium-ion inputs
- Automotive electronics operating within specified voltage ranges
Procurement Notes
Verify the complete part number including suffixes such as #PBF for lead-free compliance when ordering. Confirm the specific package variant (IUFD vs IFE) matches the required footprint. Check manufacturer documentation for any recent Product Change Notices regarding material or assembly updates. Ensure compatibility with existing PCB layout guidelines provided in the datasheet.
Selection Notes
Select this component when multiple isolated or non-isolated lower voltages are needed from a higher bus. Consider the maximum input voltage limit relative to the source supply. Evaluate thermal requirements based on the total output current and package thermal resistance. Verify that the desired output voltage range falls within the adjustable limits defined by the feedback resistor network.
Part Context
This part belongs to the LT3514 family of triple synchronous buck regulators. It shares architectural similarities with other Linear Technology PMICs but offers distinct multi-output integration. The IUFD suffix indicates a specific industrial grade temperature range and package configuration compared to commercial variants.
Replacement Considerations
Direct substitutes include the LT3514IFE#PBF for identical electrical performance in a different package. Cross-reference with LT3504EUFD#PBF if four outputs are required instead of three. Verify pinout compatibility before replacing to ensure board-level integration without modification.
