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Product Detailed Parameters
- Description：IC REG CTRLR BUCK/BOOST 28TSS
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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#TRPBF is a synchronous four-switch buck-boost DC/DC controller from Analog Devices Inc., designed for input voltages above, below, or equal to the output voltage. It operates within a 4V to 60V supply range and supports switching frequencies between 190kHz and 630kHz. The device features a maximum duty cycle of 95% and includes integrated soft-start capabilities. Packaged in a 28-TSSOP-EP surface-mount format, it provides positive step-up/step-down regulation with one output phase.
Feature Summary
- Synchronous four-switch topology supporting buck, boost, and pass-through modes
- Proprietary peak buck/peak boost current mode control architecture
- Integrated spread spectrum modulation to minimize electromagnetic interference
- Built-in soft-start function to limit inrush current during startup
Applications
- Automotive USB Type-C power solutions
- Industrial distributed power systems
- Battery-powered equipment requiring wide input ranges
- Telecommunications infrastructure power management
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors. Confirm package integrity and pin alignment against the 28-TSSOP-EP specification sheet. Ensure storage conditions comply with moisture sensitivity levels prior to reflow soldering. Cross-reference ordering part numbers to distinguish between tube and reel packaging variants.
Selection Notes
Select this controller when input voltage fluctuates significantly around the target output level. The wide 4V to 60V operating range accommodates various battery chemistries and automotive loads. Consider the fixed frequency options and spread spectrum feature for applications requiring strict EMI compliance. Evaluate thermal performance requirements due to the high-current synchronous design.
Part Context
This component belongs to the LT8390 family of synchronous buck-boost controllers. It shares architectural similarities with other ADI power management ICs but is distinct in its four-switch configuration and specific frequency ranges. The FE suffix indicates the specific package type and temperature rating compared to other variants in the series.
Replacement Considerations
Direct substitutes include LT8390EFE#PBF (tube packaging) and LT8390AIFE#TRPBF. Verify that alternative packages match the footprint and thermal pad requirements. Ensure switching frequency specifications align with existing inductor and capacitor selections to maintain stability.
