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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 28
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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#TRPBF is a synchronous 4-switch buck-boost DC/DC controller manufactured by Analog Devices Inc. It operates within 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 typical quiescent current of 1 uA. It utilizes a 28-WFQFN (4x5) package with an exposed pad for surface mount installation.
Feature Summary
- Synchronous four-switch topology enabling seamless transition between buck, boost, and pass-through modes
- Frequency synchronization capability to align with external clocks or optimize EMI via spread spectrum
- Integrated protection mechanisms including adjustable current limiting, protection latch, and hiccup mode
Applications
- Battery-powered systems requiring wide input voltage ranges
- Industrial control applications needing robust power management
- Automotive electronics operating under varying load conditions
Procurement Notes
Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm that the A-grade temperature rating (-40°C to +125°C) meets your operational requirements. Ensure compatibility with the 28-WFQFN footprint during PCB layout. Cross-reference datasheet specifications for exact electrical limits before finalizing procurement.
Selection Notes
Select this component for designs requiring high efficiency across wide input-output voltage differentials. The synchronous architecture reduces external component count compared to traditional solutions. Consider the 2 MHz maximum frequency for smaller passive component sizes. Evaluate thermal performance given the QFN package constraints for high-current applications.
Part Context
This part belongs to the LT8390 family of synchronous buck-boost controllers. It shares architectural similarities with other members like the LT8390EUFD but differs in temperature grade and switching frequency capabilities. The AIUFD designation specifies the industrial temperature range and pin-compatible form factor within the Analog Devices portfolio.
Replacement Considerations
LT8390EUFD#PBF serves as a related variant with different frequency characteristics. Verify pinout compatibility and thermal performance when substituting. Check datasheet differences regarding switching frequency ranges and temperature ratings to ensure functional equivalence.
