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Product Detailed Parameters
- Description：IC REG BUCK ADJ 5A 20QFN
- Series：Silent Switcher®1
- Mfr：Analog Devices Inc.
- Package：Tube
- 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 ~ 150°C (TJ)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：20-WFQFN, 18 Leads, Exposed Pad
- Supplier Device Package：20-QFN (3x4)
- Grade：-
- Qualification：-
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Overview
The LT8640JUDCF-1#PBF is a synchronous step-down switching regulator from Analog Devices, featuring the Silent Switcher architecture. It supports an input voltage range of 3.4V to 42V and delivers up to 5A output current. The device offers adjustable output voltages from 970mV to 41.9V with a programmable switching frequency between 200kHz and 3MHz. Packaged in a QFN-18 footprint, it operates within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates two internal input capacitors to minimize electromagnetic interference emissions.
- Features spread spectrum frequency modulation for enhanced noise performance.
- Includes integrated power switches and control circuitry to reduce external component count.
Applications
- Automotive battery powered systems
- Industrial power supplies
- Point-of-load regulation
Procurement Notes
Verify the specific suffix '-1' against official documentation to confirm pinout or feature variations. Ensure the QFN-18 package matches thermal requirements. Confirm AEC-Q100 qualification status if automotive compliance is mandatory. Cross-reference datasheet revisions for any updates to electrical characteristics.
Selection Notes
Select this component for applications requiring low electromagnetic interference and high efficiency in compact designs. The wide input voltage range accommodates various supply sources. Consider the thermal performance of the exposed pad design for heat dissipation needs in dense layouts.
Part Context
This part belongs to the LT8640 family of Silent Switcher regulators. It shares architectural similarities with other variants like the LT8640S series but differs in output current ratings and package configurations. The family emphasizes ultra-low emission and high-speed operation for demanding power management tasks.
Replacement Considerations
LT8640JUDCF#PBF serves as a primary alternative within the same package and current rating class. Verify functional equivalence regarding the specific '-1' suffix configuration before substitution.
