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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 LT8640EUDC#TRPBF is a synchronous buck Silent Switcher regulator from Analog Devices, housed in an 18-lead QFN package. It supports an input voltage range of 3.4V to 42V and delivers up to 5A continuous output current with a peak transient capability of 7A. The adjustable output voltage spans from 970mV to 41.9V. Operating frequencies are programmable between 200kHz and 3MHz. The device features ultra-low quiescent current of 1.7µA and operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Silent Switcher architecture minimizes electromagnetic interference radiation without requiring external filters.
- Programmable switching frequency allows synchronization to external clocks or spread-spectrum operation for EMI optimization.
- Ultra-low quiescent current enables high efficiency at very light load conditions.
- Fast minimum top switch turn-on time supports high step-down conversion ratios.
Applications
- Automotive electronics systems
- Industrial power distribution networks
- General-purpose DC-DC conversion stages
Procurement Notes
Verify the specific suffix against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer datasheets. Ensure ordering quantities match available reel sizes. Validate that the component meets AEC-Q100 requirements if intended for automotive qualification. Cross-reference part numbers with authorized distributors to avoid counterfeit risks.
Selection Notes
Select this component when designing circuits requiring wide input voltage ranges and high efficiency under varying loads. The Silent Switcher technology is suitable for space-constrained designs sensitive to electromagnetic noise. Consider the thermal performance of the exposed pad QFN package for heat dissipation. Evaluate the need for external synchronization if operating near sensitive radio frequency bands.
Part Context
This part belongs to the LT8640 family of synchronous buck converters. The series is characterized by its ability to operate at high frequencies while maintaining low EMI emissions. The family includes variants with different packaging options and temperature ratings to suit diverse industrial and automotive applications.
Replacement Considerations
LT8640EUDC#PBF offers identical electrical specifications but utilizes tube packaging instead of tape and reel. LT8640IUDC#TRPBF provides the same functionality with an extended industrial temperature range. Verify pinout compatibility and thermal characteristics before substituting.
