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Product Detailed Parameters
- Description：IC REG BUCK 2.5V 1.5A 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Current - Output：1.5A
- Frequency - Switching：200kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
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Overview
The LT1578IS8-2.5#TRPBF is a monolithic switching regulator from Analog Devices, available in Buck or SEPIC topologies depending on the application circuit configuration. It integrates a 1.5A switch, oscillator, and control logic. The device operates at a fixed frequency of 200kHz with current-mode control for stability. Input voltage ranges from 4V to 15V. Output configurations include fixed voltages such as 2.5V or 3.3V, or adjustable outputs, supporting up to 1.5A output current.
Feature Summary
- Integrates a high-current 1.5A power switch within a compact monolithic package.
- Employs current-mode topology to ensure rapid transient response and robust loop stability.
- Includes all necessary internal oscillators, control circuits, and logic for simplified design.
Applications
- Dual output SEPIC converter designs
- 3.3V step-down (Buck) converter implementations
- General DC-to-DC conversion requiring integrated power switching
Procurement Notes
Verify the specific suffix and datasheet revision when ordering, as the LT1578 family supports multiple topologies. Confirm that the #TRPBF designation indicates tape-and-reel packaging if required by automated assembly processes. Cross-reference the exact input/output voltage requirements against the selected reference design, as performance varies between Buck and SEPIC configurations.
Selection Notes
Select this component for applications requiring an integrated solution without external pass transistors. Ensure the load current does not exceed the 1.5A internal switch limit. Consider the 200kHz switching frequency for EMI and filter size trade-offs. Verify thermal management capabilities for the SOIC-8 package under maximum load conditions.
Part Context
This part belongs to the LT1578 series of switching regulators. It is distinct from other Analog Devices PMICs like the LT1507 or LT3970 due to its specific 200kHz frequency and 1.5A current rating. The IS8-2.5 variant typically refers to the industrial temperature range and specific output voltage setting in certain reference configurations.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on pin compatibility and electrical specifications only after verifying official manufacturer substitution lists.
