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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 38TSSOP
- 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：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad
- Supplier Device Package：38-TSSOP-EP
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Overview
The LT8705MPFE#PBF is a high-performance synchronous buck-boost switching regulator controller from Analog Devices Inc. It operates with input voltages above, below, or equal to the output voltage, supporting up to 80V VIN and VOUT. The device features a 38-TFSOP package with an exposed pad and supports a switching frequency range of 100kHz to 400kHz. It includes clock synchronization, soft start, and enable functions. The operating temperature range extends from -55°C to 150°C (TJ), making it suitable for demanding industrial applications.
Feature Summary
- Synchronous four-switch buck-boost topology for efficient power conversion across input/output voltage ranges
- Clock synchronization capability to reduce system noise and allow parallel operation
- Integrated soft start and enable control for safe startup and power management
- Extended industrial temperature rating for reliable operation in harsh environments
Applications
- Supercapacitor backup power systems
- Industrial distributed power architectures
- Telecom voltage stabilizers
- Battery-powered equipment with wide input voltage variations
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors. Confirm package marking matches LT8705MPFE#PBF. Check datasheet revision history for any recent changes. Ensure storage conditions comply with moisture sensitivity levels. Validate supplier documentation against official Analog Devices part specifications before procurement.
Selection Notes
Select this controller when input voltage varies significantly around the output voltage level. Consider the 80V maximum rating for high-voltage systems. Evaluate thermal performance given the 150°C junction temperature limit. Compare switching frequency requirements against EMI constraints. Verify compatibility with external MOSFETs for the four-switch topology implementation.
Part Context
The LT8705 series represents Analog Devices' advanced buck-boost controller family designed for applications requiring seamless transition between boost and buck modes. The MPFE variant offers extended temperature range compared to standard versions. This controller integrates precision current mode control and provides robust protection features for critical power conversion tasks in industrial and telecom sectors.
Replacement Considerations
LT8705EFE#PBF serves as a direct pin-compatible alternative with standard industrial temperature range (-40°C to 125°C). Verify temperature requirements before substitution. Both parts share identical electrical characteristics and pinout configurations. Ensure PCB layout remains unchanged during replacement to maintain performance integrity.
