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Product Detailed Parameters
- Description：80V SYNCHRONOUS 4-SWITCH BUCK-BO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tray
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Number of Outputs：1
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：2.8V ~ 60V
- Frequency - Switching：100kHz ~ 400kHz
- Duty Cycle (Max)：80%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：64-LQFP Exposed Pad
- Supplier Device Package：64-LQFP-EP (10x10)
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Overview
The LT8708HLWE#PBF is an 80V synchronous four-switch buck-boost DC/DC controller from Analog Devices. It operates with an input voltage range of 2.8V to 60V and supports a switching frequency between 100kHz and 400kHz. The device features a maximum duty cycle of 80% and utilizes a 64-LQFP-EP (10x10) package. It provides two output phases for high-performance power conversion applications requiring wide input/output voltage ranges.
Feature Summary
- Synchronous four-switch topology supporting buck, boost, and buck-boost modes
- Wide input voltage range accommodating voltages above, below, or equal to output
- Programmable switching frequency for optimized efficiency and component size
- Integrated gate drivers for external synchronous MOSFETs
Applications
- Industrial power supplies with wide input ranges
- Automotive electronics requiring robust voltage regulation
- Battery-powered systems with varying charge states
- Telecommunications infrastructure power management
Procurement Notes
Verify the specific suffix (e.g., #PBF vs #WPBF) against the official Analog Devices datasheet to ensure correct temperature grade and packaging configuration. Confirm that the 64-LQFP-EP package footprint matches the design layout. Check current distributor availability as supply status may vary by region.
Selection Notes
Select this controller when a single IC must handle both step-up and step-down requirements without isolation. Ensure the external MOSFETs are rated for the maximum system voltage of 80V. Verify that the required switching frequency falls within the 100kHz to 400kHz operational window for stable control loop performance.
Part Context
This component belongs to the LT8708 family of high-performance buck-boost controllers. It is designed for applications where input voltage fluctuates significantly relative to the load requirement. The HLWE variant indicates a specific thermal and electrical specification set within the broader LT8708 product line.
Replacement Considerations
LT8708HLWE#WPBF is a documented alternative variant within the same family. Verify pin compatibility and thermal performance differences before substitution. No other direct cross-model replacements are confirmed in public documentation.
