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Product Detailed Parameters
- Description：IC REG BUCK ADJ 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)：3.4V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：0.97V
- Voltage - Output (Max)：42V
- Current - Output：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 LT8640IUDC#TRPBF is a synchronous step-down Silent Switcher regulator from Analog Devices, housed in a 20-WFQFN package. It supports an input voltage range of 3.4V to 42V and delivers up to 5A output current with adjustable output voltages starting from 0.97V. The device features a programmable switching frequency between 210kHz and 2MHz, operates within a junction temperature range of -40°C to 125°C, and includes integrated synchronous rectification for high efficiency.
Feature Summary
- Integrates Silent Switcher technology to minimize electromagnetic interference radiation without requiring external shielding or complex layout techniques.
- Features synchronous buck topology with internal high-side and low-side MOSFETs for efficient power conversion.
- Includes adjustable switching frequency capability to optimize the trade-off between efficiency and external component size.
Applications
- Industrial automation controllers
- Distributed power supply systems
- Point-of-load regulation modules
Procurement Notes
Verify the specific suffix #TRPBF confirms tape-and-reel packaging when ordering. Confirm the I-grade temperature rating (-40°C to 125°C) matches the application requirements. Ensure compatibility with the DC2202A evaluation board if prototyping. Check for RoHS compliance status on the latest datasheet revision before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring high input voltage tolerance up to 42V and moderate output currents around 5A. The I-grade variant is suitable for industrial environments where extended temperature ranges are necessary. Consider the QFN package footprint for PCB layout constraints. Compare against other LT8640 variants if different thermal grades or packaging options like tubes are preferred over reels.
Part Context
This part belongs to the LT8640 family of Silent Switcher regulators designed for high-efficiency DC-DC conversion. It shares architectural similarities with other members like the LT8640EUDC and LT8640HUDC but differs in temperature grading and packaging. The series is characterized by its ability to handle wide input voltage ranges while maintaining low EMI emissions through integrated shielded inductor designs.
Replacement Considerations
LT8640EUDC#TRPBF offers similar electrical characteristics with potentially different thermal performance. LT8640HUDC#TRPBF provides an extended temperature range up to 150°C. Verify pinout compatibility and thermal pad connections when substituting these variants.
