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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A QUAD 28QFN
- 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：4
- Voltage - Input (Min)：3.2V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：40V
- Current - Output：1A
- Frequency - Switching：250kHz ~ 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)
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Overview
The LT3504EUFD#TRPBF is a monolithic switching regulator featuring four independent buck converters in a single package. It supports an input voltage range of 3.2V to 40V with adjustable outputs up to 40V. Each channel provides 1A output current and operates at a fixed 2.2MHz switching frequency. The device includes integrated power switches, offering high efficiency in a compact QFN-28 package. It features 100% duty cycle capability for low dropout operation and supports parallel operation for increased current.
Feature Summary
- Integrates four independent 1A buck regulators within a single chip
- Supports wide 3.2V to 40V input voltage range
- Enables 100% duty cycle operation for minimal voltage drop
- Features internal 2.2MHz switching frequency for small passive size
Applications
- Industrial systems requiring multiple isolated or non-isolated rails
- Automotive electronics with wide input voltage variations
- Distributed power architectures in telecom infrastructure
- Battery-powered equipment needing efficient step-down conversion
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. Ensure the component matches the QFN-28 footprint requirements for your PCB layout. Check RoHS compliance status through official documentation before integration.
Selection Notes
Select this component when four separate regulated outputs are needed from a single high-voltage source. The 2.2MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider thermal management due to the density of four channels in a QFN-28 package. Verify that the 1A per channel limit meets the load requirements for all four rails.
Part Context
This part belongs to the LT3504 family of multi-channel switching regulators. It is designed to simplify power distribution in complex systems by replacing multiple discrete regulators. The EUFD package variant offers a thermally enhanced quad flat no-lead form factor suitable for surface mount assembly.
Replacement Considerations
LT3504EUFD#PBF is the tube-packaged equivalent of this component. Both share identical electrical specifications and pinouts. Choose based on manufacturing assembly preferences rather than functional differences.
