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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 28
- 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：645kHz ~ 2.1MHz
- 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 LT8390AIUFD#PBF is a synchronous four-switch buck-boost DC/DC controller from Analog Devices. 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 an adjustable switching frequency between 600 kHz and 2 MHz, with a maximum static current of 2.1 mA. It provides load regulation of 1% and functions within a temperature range of -40°C to +125°C. Packaged in a QFN-28 format, it includes shutdown functionality for power management applications.
Feature Summary
- Synchronous four-switch topology enabling seamless buck and boost operation
- Wide input voltage range supporting 4 V to 60 V sources
- Adjustable switching frequency up to 2 MHz for optimized design flexibility
Applications
- Industrial power supply systems
- Automotive electronics requiring wide input ranges
- Battery-powered equipment with varying cell counts
- Telecommunications infrastructure power modules
Procurement Notes
Verify the specific suffix PBF indicates lead-free compliance and tube packaging when ordering. Confirm the AI grade designation matches required industrial temperature specifications. Ensure the QFN-28 package dimensions align with PCB footprint requirements. Cross-reference the datasheet revision date to confirm latest electrical characteristics. Validate that the supplier source provides official Analog Devices documentation.
Selection Notes
Select this component for designs requiring high input voltage tolerance up to 60 V. Consider the 2.1 mA quiescent current for efficiency calculations in standby modes. Evaluate the thermal performance capabilities within the specified -40°C to +125°C operating range. Compare against lower voltage alternatives if system inputs remain below 40 V. Assess external component selection based on the 600 kHz to 2 MHz frequency range.
Part Context
This part belongs to the LT8390A family of synchronous buck-boost controllers. It shares architectural similarities with other members like the LT8390AHUFD#PBF but differs in temperature grading. The series focuses on high-voltage applications requiring flexible step-up or step-down conversion. It complements LED driver variants such as the LT8391A by offering general voltage regulation capabilities.
Replacement Considerations
The LT8390AHUFD#PBF serves as a public confirmed substitute within the same family, offering extended temperature ratings. Verify pin compatibility and thermal performance when substituting. Check datasheet differences regarding junction temperature limits and electrical parameters.
