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Product Detailed Parameters
- Description：IC REG BUCK ADJ 5A 20QFN
- Series：-
- 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)：2.9V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：0.97V
- Voltage - Output (Max)：41.58V
- Current - Output：5A
- Frequency - Switching：200kHz ~ 3MHz
- 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：Automotive
- Qualification：AEC-Q100
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Overview
The LT8640JUDCF#WTRPBF is an automotive-grade synchronous step-down switching regulator from Analog Devices, featuring the Silent Switcher architecture. It delivers a continuous output current of 5A with an adjustable output voltage range from 0.97V to 41.58V. The device operates with an input voltage range of 3.4V to 42V and supports programmable switching frequencies between 200kHz and 3MHz. It is housed in a 20-WFQFN package with exposed pad and is qualified to AEC-Q100 standards for operation across a junction temperature range of -40°C to 150°C.
Feature Summary
- Silent Switcher technology integrates high-side and low-side MOSFETs within a compact footprint to minimize radiated electromagnetic interference without requiring external shielding.
- Automotive qualification ensures reliability and performance consistency under strict environmental conditions defined by AEC-Q100 standards.
- Synchronous rectification provides high efficiency across wide load ranges while maintaining stable regulation for sensitive downstream components.
Applications
- Power distribution units in automotive infotainment and telematics systems
- Battery-powered industrial equipment requiring isolated or non-isolated DC-DC conversion
- On-board charging (OBC) auxiliary power supplies in electric vehicles
Procurement Notes
Verify that the specific suffix WTRPBF corresponds to the tape-and-reel packaging format required for automated surface-mount assembly processes. Confirm that the component meets the specific AEC-Q100 grade requirements for your target automotive application zone. Ensure compatibility with lead-free soldering profiles during manufacturing integration.
Selection Notes
Select this component when designing for automotive environments where electromagnetic compatibility is critical and space is constrained. The integrated shielded inductor design reduces board area compared to discrete solutions. Consider the thermal performance of the exposed pad for heat dissipation in high-current applications.
Part Context
This part belongs to the LT8640 family of Silent Switcher regulators, which are designed to address the growing demand for compact, efficient power solutions in automotive and industrial sectors. The J suffix indicates automotive grade qualification, distinguishing it from commercial variants like the I suffix. The family emphasizes noise reduction and high efficiency.
Replacement Considerations
LT8640IUDCF#WTRPBF serves as a commercial-grade alternative with identical electrical specifications but different qualification standards. LT8640JUDCF#PBF offers the same automotive performance in tube packaging instead of reel. Verify package pinout compatibility before substitution.
