SC493ULTRT

Overview

The SC493ULTRT is an EcoSpeed step-down controller featuring an I2C interface. It operates with a supply voltage range of 4.5V to 27V and supports output voltages up to 42V. The device integrates an internal switch and supports PWM dimming at frequencies up to 1.2MHz. It provides a maximum output current of 30mA across three channels, packaged in a 16-UFQFN (3x3mm) exposed pad configuration.

Feature Summary

• Integrates an I2C interface for digital control and configuration
• Supports PWM dimming functionality for backlight applications
• Features an internal power switch within a compact footprint

Applications

• Backlight driver systems
• Portable electronic devices requiring regulated LED power
• Compact consumer electronics with space constraints

Procurement Notes

Verify the specific suffix against official Semtech documentation to confirm package type and tape-and-reel specifications. Confirm component status as distribution data may indicate end-of-life or obsolescence. Ensure compatibility with required operating temperature ranges and input voltage profiles before procurement.

Selection Notes

Select this component when an I2C-controlled synchronous buck topology is required for low-current LED strings. Evaluate the 16-UFQFN package for thermal dissipation needs relative to the PCB layout. Consider the 1.2MHz switching frequency for passive component size optimization compared to lower-frequency alternatives.

Part Context

This part belongs to the SC443 series of LED drivers from Semtech Corporation. It is designed for high-efficiency power management in mobile and portable applications. The series emphasizes small form factors and digital controllability for modern display backlights.

Replacement Considerations

Consult official Semtech substitution guides for verified equivalents. Generic cross-reference lists are insufficient; only manufacturer-approved pin-compatible or functionally identical parts should be considered.