LM3557SD-2

LED Driver IC Overview

The LM3557SD-2 is a synchronous boost converter designed for white LED applications, manufactured by Texas Instruments. It operates within an input voltage range of 2.7 V to 5.5 V and supports a switching frequency of approximately 1.2 MHz. The device delivers up to 800 mA output current and functions across a temperature range of -40°C to 85°C. Packaged in an 8-WSON (3x3 mm) surface-mount format, it integrates high-side switches for efficient power conversion.

LED Driver IC Feature Summary

• Synchronous step-up topology optimized for white LED backlighting
• Integrated high-side current-mode control architecture
• Compact 8-WSON package design for space-constrained layouts

LED Driver IC Applications

• White LED backlight drivers
• Mobile device illumination systems
• Portable electronic lighting modules

LED Driver IC Procurement Notes

Verify the specific ordering suffix against official Texas Instruments documentation to confirm exact package variant and tape/reel specifications. Ensure compatibility with required thermal dissipation standards for the target application environment before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component for designs requiring a compact synchronous boost solution for white LEDs. Confirm that the 800 mA current limit and 1.2 MHz frequency align with system efficiency targets and electromagnetic interference constraints.

LED Driver IC Part Context

This part belongs to the LM3557 series of LED driver ICs from Texas Instruments. It serves as a specialized power management solution for portable electronics, distinguishing itself through integrated synchronous rectification and high-efficiency operation in small form factors.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.