LT1576IS8-SYNC#PBF

Overview

The LT1576IS8-SYNC#PBF is a synchronous step-down switching regulator manufactured by Analog Devices. It operates with an input voltage range of 5 V to 25 V and provides a fixed 5 V output at up to 1.5 A. The device integrates high-side and low-side power switches for improved efficiency. It features a fixed 200 kHz switching frequency, adjustable soft-start, and cycle-by-cycle current limiting. The component supports shutdown mode and functions within a temperature range of -40°C to +125°C in an 8-lead SOIC package.

Feature Summary

• Integrated synchronous rectification using internal N-channel MOSFETs
• Fixed 200 kHz switching frequency for compact external component sizing
• Adjustable soft-start capability limits inrush current during startup
• Cycle-by-cycle current limiting protects against output short circuits

Applications

• Point-of-load regulation for digital logic supplies
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with 5V distribution networks
• Communication infrastructure power management modules

Procurement Notes

Verify the specific SYNC suffix indicates synchronous operation compatible with your design requirements. Confirm the IS8 package variant matches your PCB footprint constraints. Check current availability status as supply levels may fluctuate. Ensure the #PBF designation meets environmental compliance standards for your target market. Validate that the fixed 5V output aligns with your system voltage needs.

Selection Notes

Select this component when high efficiency is required without external Schottky diodes. The synchronous design reduces heat generation compared to standard buck regulators. Consider the 200 kHz frequency for balancing size and noise. Verify input voltage does not exceed 25 V maximum rating. Evaluate thermal performance under full load conditions within the operating temperature range.

Part Context

This part belongs to the LT1576 family of switching regulators designed for medium-current applications. It serves as a cost-effective solution for replacing linear regulators in battery-operated devices. The synchronous version offers superior efficiency over non-synchronous counterparts. It complements other Linear Technology PMIC components in complex power architectures.

Replacement Considerations

LT1576IS8-5#PBF: Non-synchronous alternative with identical pinout but lower efficiency due to external diode requirement.