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Product Detailed Parameters
- Description：IC REG CTRLR BUCK/BOOST 28TSS
- 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：1
- Voltage - Supply (Vcc/Vdd)：4V ~ 60V
- Frequency - Switching：190kHz ~ 630kHz
- Duty Cycle (Max)：95%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8390EFE#PBF is a synchronous four-switch buck-boost DC/DC controller manufactured by Analog Devices Inc. It supports input voltages ranging from 4 V to 60 V and regulates output voltages from 0 V to 60 V. The device operates at a fixed switching frequency between 600 kHz and 2 MHz, utilizing proprietary peak buck/peak boost current mode control. Key electrical parameters include a quiescent current of 2.1 mA, load regulation of 1%, and an operating temperature range from -40°C to +125°C. It is housed in a TSSOP-EP-28 package.
Feature Summary
- Supports input voltages above, below, or equal to the regulated output voltage through synchronous four-switch topology.
- Utilizes proprietary peak buck/peak boost current mode control for precise regulation of output voltage, input current, or output current.
- Features internal soft-start capability to limit inrush current during startup sequences.
Applications
- Automotive lighting systems requiring wide input voltage ranges
- Battery-powered equipment with varying cell counts
- Industrial power supplies with fluctuating input sources
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm that the part number suffix matches the specific temperature grade and package variant required for your design. Request original manufacturer documentation to ensure compliance with RoHS standards and traceability requirements. Validate supply chain integrity to avoid counterfeit components.
Selection Notes
Select this controller when the application demands operation across buck, boost, and buck-boost modes within a single stage. Ensure the external switch ratings accommodate the maximum expected currents. Verify that the desired switching frequency falls within the 600 kHz to 2 MHz range supported by the EFE suffix. Consider thermal management requirements given the TSSOP-EP-28 package constraints.
Part Context
The LT8390EFE#PBF belongs to the LT8390 family of synchronous buck-boost controllers designed for high-efficiency power conversion. This specific variant features the EFE suffix indicating a 600 kHz to 2 MHz switching frequency range and an extended industrial temperature rating. It complements other variants like the LT8390HFE which offers lower frequency options.
Replacement Considerations
LT8390AIFE#PBF offers similar functionality with a different switching frequency range. LT8390HFE#PBF provides alternative frequency characteristics. Direct substitution requires verification of switching frequency compatibility and thermal performance within the target application environment.
