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Product Detailed Parameters
- Description：SWITCHING VOLTAGE REGULATORS 100
- 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：1
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：6V ~ 100V
- Frequency - Switching：80kHz ~ 600kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：-
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：38-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8228EFE#PBF is a 100V bidirectional synchronous buck/boost controller from Analog Devices. It supports constant-current or constant-voltage regulation with automatic or external power flow control. Key parameters include an input/output voltage range of 6V to 100V, a programmable switching frequency between 80kHz and 600kHz, and feedback voltage accuracy of ±1.0% across the temperature range. The device operates within a junction temperature range of -40°C to +125°C and features independent compensation networks for boost and buck modes. It is housed in a 38-lead TSSOP-EP package.
Feature Summary
- Bidirectional energy management with automatic or externally controlled power flow direction
- Comprehensive protection including negative voltage tolerance up to -60V and short-circuit detection
- Masterless fault-tolerant load sharing allowing parallel operation without a primary controller
- Independent compensation networks for optimized transient response in both buck and boost modes
Applications
- 48V/12V dual-battery automotive systems
- Hybrid and electric vehicle power redundancy
- High-power backup and power stabilization systems
- Complex power systems requiring bidirectional energy transfer
Procurement Notes
Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the EFE variant corresponds to the -40°C to +125°C industrial temperature range. Ensure the 38-pin TSSOP-EP footprint matches the PCB design. Cross-reference the datasheet revision date against the manufacturing lot code to ensure component consistency.
Selection Notes
Select this model for applications requiring high-voltage bidirectional DC-DC conversion. The independent compensation network distinguishes it from simpler controllers by offering superior transient performance. Consider the masterless load-sharing feature if system scalability and redundancy are critical requirements for the power architecture.
Part Context
This component belongs to the LT8228 family, which includes variants like LT8228HFE and LT8228IFE. While core functionality remains consistent, these models differ primarily in operating temperature ranges and package options. The EFE variant is specified for standard industrial environments, providing a balance of performance and reliability for general-purpose power management tasks.
Replacement Considerations
LT8228HFE#PBF offers extended high-temperature capability up to +150°C. LT8228IFE#PBF provides alternative packaging or versioning within the same industrial temperature range. Verify pinout compatibility and thermal characteristics when substituting these variants.
