SC668ULTRT

Overview

The SC668ULTRT is an LED light management unit manufactured by Semtech Corporation. It integrates a boost converter, charge pump, eight LED current sinks, and four low-dropout regulators (LDOs). The device supports automatic dropout prevention, ambient light sensing, and PWM dimming. It operates within an input voltage range of 2.9 V to 5.5 V and functions at a switching frequency of 400 kHz. The component is housed in an MLPQ-UT-20 package and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates boost topology and charge pump for flexible LED driving configurations
• Includes four dedicated LDOs for auxiliary power supply requirements
• Supports ambient light sensing input for adaptive brightness control
• Features automatic dropout prevention to maintain stable LED operation

Applications

• Smartphone camera flash systems
• Mobile device front lighting
• Portable electronic display backlighting

Procurement Notes

Verify the specific suffix against official Semtech documentation to confirm pin compatibility and electrical characteristics. Ensure the ordering quantity aligns with manufacturer reel specifications. Confirm RoHS compliance status through the latest datasheet revision before finalizing procurement orders.

Selection Notes

Select this component when designing high-density mobile applications requiring integrated power management for multiple LEDs. The combination of boost and charge pump topologies allows for efficient driving of series and parallel LED strings from a single cell battery source.

Part Context

This part belongs to the SC6 series of LED drivers from Semtech. It is functionally similar to the SC667 but includes additional LDO outputs. It serves as a specialized solution for complex lighting architectures in compact consumer electronics where space and integration are critical constraints.

Replacement Considerations

SC667ULTRT offers comparable boost and charge pump functionality but lacks the four integrated LDOs found in the SC668.