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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)
- 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, Wettable Flank
- Package / Case：20-WFQFN, 18 Leads, Exposed Pad
- Supplier Device Package：20-QFN (3x4)
- Grade：-
- Qualification：-
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Overview
The LT8640EUDCF#TRPBF is a synchronous step-down switching regulator from Analog Devices, designed for high-efficiency power conversion. It features an adjustable output voltage range from 970 mV to 41.58 V with a maximum continuous output current of 5 A. The device supports a wide input voltage range of 3.4 V to 42 V and operates with a programmable switching frequency between 200 kHz and 3 MHz. It incorporates Silent Switcher technology to minimize electromagnetic interference. The component is housed in a 18-lead WQFN package with exposed pad, rated for operation temperatures from -40°C to +125°C.
Feature Summary
- Integrates Silent Switcher architecture to reduce radiated electromagnetic emissions without external filters
- Provides synchronous rectification for improved efficiency across load conditions
- Supports wide input voltage range suitable for various bus architectures
- Features adjustable switching frequency to optimize trade-offs between size and performance
Applications
- Industrial automation control systems
- Telecommunications infrastructure power distribution
- Automotive electronics requiring robust voltage regulation
- Point-of-load conversion in computing equipment
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the E-grade designation meets the required operating temperature range for your application environment. Ensure compatibility with the intended PCB footprint for the 18-lead WQFN package. Cross-reference the datasheet revision date to confirm technical specifications align with current manufacturing standards.
Selection Notes
Select this component when a 5 A output current is required within a compact form factor. Consider the Silent Switcher feature if strict electromagnetic compatibility limits apply to the design. Evaluate the thermal performance requirements given the QFN package type. Compare against other LT8640 variants if different current ratings or package options are needed for space constraints.
Part Context
This part belongs to the LT8640 family of synchronous buck converters from Analog Devices. The series is characterized by its integrated passive components and low noise profile. Variants within the family differ primarily in output current capacity, package style, and temperature grade. The LT8640 line targets applications demanding high density and reliability in power management solutions.
Replacement Considerations
Direct substitutes include other LT8640 variants such as LT8640IUDCF#TRPBF or LT8640SIV-2#TRPBF, depending on required current and package. Verify pinout compatibility and thermal characteristics before substitution. Consult official documentation for any functional differences between grades.
