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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 38QFN
- 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：2
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：2.8V ~ 80V
- Frequency - Switching：100kHz ~ 400kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：38-WFQFN Exposed Pad
- Supplier Device Package：38-QFN (5x7)
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Overview
The LT8705EUHF#TRPBF is a high-performance synchronous four-switch buck-boost switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 2.8V to 80V and supports output voltages from 1.3V to 80V. The device delivers up to 10A of output current with a quiescent current of 2.65mA. It features a programmable switching frequency between 100kHz and 400kHz and functions within a temperature range of -40°C to +125°C. Packaged in a 38-QFN (5x7) format, it integrates input and output current limiting loops.
Feature Summary
- Synchronous four-switch topology enabling seamless operation above, below, or equal to the output voltage
- Integrated feedback loops for precise input current, input voltage, output current, and output voltage regulation
- Programmable switching frequency with clock synchronization capability
- Built-in soft start and shutdown control features
Applications
- Supercapacitor backup power systems
- Battery-powered equipment requiring wide input voltage ranges
- Industrial automation controllers
- Telecommunications infrastructure power supplies
Procurement Notes
Verify component authenticity through authorized distribution channels due to limited supply status. Confirm package integrity and pinout alignment with design specifications. Review manufacturer datasheets for latest electrical characteristics and thermal performance data. Ensure compatibility with external passive components and PCB layout requirements before integration into final assemblies.
Selection Notes
Select this controller for applications demanding wide input voltage flexibility and high efficiency across varying load conditions. Consider the 38-QFN package for compact designs requiring robust thermal dissipation. Evaluate the 10A current capability against peak load requirements. Verify that the 100kHz to 400kHz frequency range aligns with electromagnetic interference constraints and inductor selection criteria.
Part Context
This component belongs to the LT8705 family of buck-boost regulators designed for versatile power management solutions. It serves as a DC-DC switching controller rather than a complete integrated circuit, requiring external power switches. The EUHF suffix denotes the specific QFN package variant optimized for surface-mount assembly and thermal performance in dense electronic layouts.
Replacement Considerations
LT8705EFE#PBF offers identical electrical functionality in a TSSOP-EP-38 package. LT8705AIUHF provides similar performance in a QFN-38 package with potentially different temperature grades. Verify pin-to-pin compatibility and thermal pad connections when substituting these variants.
