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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.5A 8SO
- Series：-
- Mfr：Linear Technology
- Package：Bulk
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.21V
- Voltage - Output (Max)：14.1V
- 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
- Grade：-
- Qualification：-
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Overview
The LT1578IS8#PBF is a monolithic switching regulator manufactured by Analog Devices (formerly Linear Technology). It integrates a 1.5A power switch, oscillator, and control logic into an 8-pin SOIC package. The device supports Buck and SEPIC topologies with a fixed 200kHz switching frequency. Input voltage ranges from 4V to 15V for Buck mode and 6V to 15V for SEPIC mode. It utilizes current-mode control for fast transient response and loop stability.
Feature Summary
- Integrates a high-current 1.5A power switch on the die
- Supports versatile DC-DC conversion topologies including Buck and SEPIC
- Employs current-mode control architecture for enhanced stability
Applications
- Dual output power supply designs using SEPIC topology
- Single output step-down voltage regulation using Buck topology
- Portable equipment requiring efficient DC-DC conversion
Procurement Notes
Verify the specific suffix against official Analog Devices documentation to confirm pinout and electrical characteristics. Ensure the component matches the required thermal performance for the intended application environment. Confirm RoHS compliance status through the manufacturer's latest datasheet or certification documents before finalizing procurement.
Selection Notes
Select this component when a compact solution is needed for input voltages up to 15V. The integrated 1.5A switch capability suits moderate load requirements without external passives. Current-mode control makes it suitable for applications demanding rapid transient recovery. Verify that the operating temperature range meets system specifications.
Part Context
This part belongs to the LT1578 family of switching regulators. It is designed as a complete solution for DC-DC conversion, eliminating the need for discrete power switches. The series offers flexibility in topology selection, allowing designers to adapt the circuit for various voltage conversion needs within a small footprint.
Replacement Considerations
Consult official Analog Devices substitution guides for verified alternatives. Cross-reference pinouts and electrical parameters carefully. Generic replacements may not match the integrated switch current rating or control topology.
