SC811ULTRT

Overview

The SC811ULTRT is a single-cell Li-ion charger IC from Semtech, designed for adapter and USB tri-mode charging applications. It operates within an input voltage range of 4.5 V to 27 V and supports a maximum battery voltage of 4.2 V. The device features a programmable constant-current charge capability with a maximum output current of 1 A. It utilizes a 6-MLPD-UT (2x2) surface-mount package and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Supports tri-mode charging for both AC adapters and USB power sources
• Includes soft-start functionality to reduce load transients on the power supply
• Compatible with unregulated adapters due to high operating voltage range
• Complies with CCSA YD/T 1591-2006 standards

Applications

• Single-cell Li-ion battery charging in portable electronics
• Devices powered by unregulated AC adapters
• USB-powered consumer electronic devices
• Equipment requiring compliance with CCSA YD/T 1591-2006 standards

Procurement Notes

Verify the specific suffix 'ULTRT' corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm that the MLPD-8 or 6-MLPD-UT package dimensions match your PCB footprint design. Ensure the component meets RoHS and WEEE compliance requirements for your target market regulations before finalizing procurement.

Selection Notes

Select this component when designing systems that require flexibility between adapter and USB inputs for single-cell lithium-ion batteries. It is suitable for applications needing soft-start capabilities to protect upstream power supplies from current spikes. Consider its compact 2x2 mm package size for space-constrained designs and verify compatibility with unregulated power sources if standard regulated adapters are not used.

Part Context

The SC811ULTRT belongs to the SC81 series of power management integrated circuits manufactured by Semtech Corporation. This series focuses on efficient charging solutions for portable devices. The part is closely related to other models like the SC810 and SC813, which offer similar charging functionalities but may differ in input configurations or specific feature sets such as dual-input support.

Replacement Considerations

The SC810 is a documented similar part number offering single-input single-mode charging. Verify if the reduction from tri-mode to single-mode input meets your system requirements. Check datasheets for differences in package pinouts and thermal characteristics to ensure mechanical and electrical compatibility.