LT1578IS8-2.5#PBF

Overview

The LT1578IS8-2.5#PBF is a monolithic switching regulator from Analog Devices, available in an 8-pin SOIC package. It integrates a 1.5A switch and control logic for DC-DC conversion. The device supports Buck topology with an input range of 5V to 15V, producing a fixed 3.3V output at up to 1.25A. Alternatively, it operates in SEPIC mode with a 4V to 15V input range to generate dual ±5V outputs at 1.5A. The internal current-mode architecture ensures fast transient response and loop stability.

Feature Summary

• Integrates a high-current 1.5A power switch on the die
• Supports both Buck and SEPIC converter topologies
• Utilizes current-mode control for stable operation

Applications

• Dual-output SEPIC converter circuits
• Fixed 3.3V step-down voltage regulation
• General-purpose DC-DC power supply designs

Procurement Notes

Verify the specific suffix against official documentation to confirm the exact electrical configuration, as the base model supports multiple topologies. Ensure the component matches the required input and output specifications for your circuit design before procurement.

Selection Notes

Select this component when a single-chip solution for either Buck or SEPIC conversion is required. The integrated switch eliminates external MOSFETs, simplifying layout. Verify that the application requires the specific 3.3V fixed output or dual ±5V capability supported by this variant.

Part Context

This part belongs to the LT1576/LT1578 family of switching regulators. These devices are designed for applications requiring compact power solutions with integrated power switches. The IS8-2.5 designation indicates the specific package type and performance grade within the Analog Devices portfolio.

Replacement Considerations

LT1576IS8-5#PBF: A compatible Buck regulator from the same family offering a fixed 5V output.