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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3.5A 20QFN
- Series：Silent Switcher®1
- 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)：3V
- Voltage - Input (Max)：65V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：64.35V
- Current - Output：3.5A
- Frequency - Switching：210kHz ~ 2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN, 18 Leads, Exposed Pad
- Supplier Device Package：20-QFN (3x4)
- Grade：-
- Qualification：-
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Overview
The LT8641IUDC#TRPBF is a synchronous step-down switching regulator from Analog Devices, part of the Silent Switcher family. It operates with an input voltage range of 3V to 65V and delivers up to 3.5A of output current. The device features adjustable output voltages starting from 0.8V, with a maximum output capability of 64.35V. It supports switching frequencies between 210kHz and 2MHz. Packaged in a 20-WFQFN (18 leads, exposed pad) surface-mount case, it is designed for high efficiency and low electromagnetic interference applications.
Feature Summary
- Silent Switcher architecture minimizes EMI/EMC radiation without external filters
- Synchronous buck topology ensures high conversion efficiency across load ranges
- Wide input voltage range accommodates various power supply sources
- Integrated soft-start limits inrush current during startup
Applications
- Industrial point-of-load regulation
- Telecommunications infrastructure power distribution
- Automotive electronics systems
- Embedded computing power supplies
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the I-grade temperature rating matches your operational environment requirements. Ensure compatibility with the 20-QFN footprint in your PCB layout. Cross-reference the manufacturer datasheet for latest revision status before finalizing procurement specifications.
Selection Notes
Select this component for designs requiring wide input voltage tolerance and strict EMI constraints. The 3.5A current rating suits moderate power loads. Consider the 210kHz to 2MHz frequency range for trade-offs between component size and efficiency. Verify thermal performance within the 20-WFQFN package for your specific ambient conditions.
Part Context
This part belongs to the LT8641 series of Silent Switcher regulators. It shares architectural similarities with other members like LT8640 and LT8641 variants but differs in specific current ratings and package options. The series focuses on reducing radiated emissions through integrated capacitor placement and switching node shielding techniques.
Replacement Considerations
LT8641IUDC#PBF is available in tube packaging instead of reel. LT8641EUDC offers extended temperature range options. Check pinout compatibility and thermal characteristics when substituting with other Silent Switcher family members.
