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Product Detailed Parameters
- Description：IC REG CTRLR BUCK/BOOST 28QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4V ~ 60V
- Frequency - Switching：190kHz ~ 630kHz
- Duty Cycle (Max)：95%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (4x5)
- Grade：-
- Qualification：-
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Overview
The LT8390EUFD#PBF is a synchronous four-switch buck-boost DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4 V to 60 V and supports output voltages from 0 V to 60 V. The device features a programmable switching frequency between 600 kHz and 2 MHz, incorporating spread spectrum modulation for low electromagnetic interference. It utilizes a 28-lead QFN package (4x5 mm) and maintains a maximum static current of 2.1 mA. The component ensures a load regulation of 1% and functions within an operating temperature range of -40°C to +125°C.
Feature Summary
- Synchronous four-switch topology enabling efficient step-up and step-down conversion
- Integrated spread spectrum modulation for reduced electromagnetic interference emissions
- Wide input and output voltage handling capabilities up to 60 V
- Programmable switching frequency allowing optimization for size and performance
Applications
- Industrial power supply systems requiring wide input ranges
- Battery-powered equipment utilizing single-cell lithium-ion or multi-cell battery packs
- Automotive electronics operating in high-voltage environments
- Portable devices needing flexible voltage regulation
Procurement Notes
Verify the specific suffix against official Analog Devices documentation to confirm package type and environmental compliance. Ensure the procurement channel provides valid traceability for the EUFD variant. Cross-reference the manufacturer part number with authorized distributor catalogs to avoid counterfeit components. Confirm that the received units match the specified QFN-28 footprint and pinout configuration required for the design.
Selection Notes
Select this controller when designing systems with input voltages significantly higher or lower than the required output. The integrated four-switch architecture eliminates the need for external bootstrap diodes or complex gate drive circuits. Consider the spread spectrum feature if strict EMI limits are mandated. Evaluate thermal management requirements based on the QFN-28 package's thermal dissipation characteristics under expected load conditions.
Part Context
This component belongs to the LT8390 series of synchronous buck-boost controllers. It shares architectural similarities with other members like the LT8390AIUFD#PBF but differs in grade and specific operational parameters. The series is designed for applications demanding high efficiency across wide voltage transitions without requiring inductor current sensing.
Replacement Considerations
LT8390AIUFD#PBF
FAQ
Does the LT8390EUFD#PBF support spread spectrum modulation?
Yes, the datasheet indicates that this specific variant includes spread spectrum modulation to reduce electromagnetic interference.
What is the maximum input voltage for this controller?
The maximum supported input voltage is 60 V.
