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Product Detailed Parameters
- Description：IC REG BUCK
- 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：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
- Mounting Type：Surface Mount
- Package / Case：38-WFQFN Exposed Pad
- Supplier Device Package：38-QFN (5x7)
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Overview
The LT8705AIUHF is a high-performance synchronous buck-boost switching regulator controller from Analog Devices. It operates with input voltages above, below, or equal to the output voltage, supporting an input range of 2.85 V to 80 V and delivering up to 10 A output current. The device features integrated feedback loops for input/output voltage and current regulation. It utilizes a QFN-38 package and supports switching frequencies up to 400 kHz, operating within a temperature range of -40°C to +125°C.
Feature Summary
- Synchronous buck-boost topology enabling operation across input voltages above, below, or equal to the output voltage
- Integrated closed-loop control for input voltage, input current, output voltage, and output current
- Supports wide input voltage ranges suitable for supercapacitor backup applications
Applications
- Supercapacitor backup power systems
- Industrial power management requiring wide input voltage flexibility
- Battery-powered equipment with varying cell counts
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors. Confirm package integrity upon receipt. Check datasheet revisions for specific electrical characteristics. Ensure ESD protection protocols are followed during handling. Validate pinout compatibility with target PCB layout before assembly.
Selection Notes
Select this controller for designs requiring seamless transition between buck, boost, and pass-through modes. Consider thermal performance when designing for maximum current loads. Verify external component ratings against the 80 V maximum limits. Evaluate switching frequency requirements for filter size optimization.
Part Context
Part of the LT8705A family of synchronous buck-boost controllers. Designed for applications demanding high efficiency and precise regulation across wide input voltage variations. Manufactured by Analog Devices Inc., formerly Linear Technology.
Replacement Considerations
LT8705IUHF#PBF: Similar performance with different temperature grade. LT8705EUHF#PBF: Extended temperature range variant. Verify pin compatibility and electrical specifications before substitution.
