RT9750WSC

Overview

The RT9750WSC is a single-cell Li-Ion/Li-Polymer battery charger IC from Richtek USA Inc., housed in a 42-WLCSP package measuring 2.75x3.05 mm. It integrates internal load switch, power MOSFETs, and charge pump control for a 3-path constant current/constant voltage charging algorithm. The device supports programmable charge currents up to 6.35A and operates with a 5V battery pack voltage.

Feature Summary

• Integrates an internal load switch with charge pump control
• Supports 3-path constant current/constant voltage charging algorithms
• Includes integrated power MOSFETs for high efficiency

Applications

• Smartphones
• Tablets
• Portable electronic devices

Procurement Notes

Verify the specific suffix WSC against the manufacturer's official datasheet to confirm pinout and thermal characteristics. Ensure compatibility with the target PCB footprint of 42-WLCSP (2.75x3.05). Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the integrated load switch meets the system's power path requirements.

Selection Notes

Select this component when space constraints require a compact WLCSP package. It is suitable for applications needing high charge currents up to 6.35A without external pass transistors. Consider the integrated load switch functionality if power path management is required. Verify that the 5V input voltage range aligns with the system's power supply architecture.

Part Context

This component belongs to Richtek's line of smart battery chargers designed for portable electronics. It combines charging logic with power distribution features in a minimal footprint. The integration of MOSFETs reduces external component count compared to discrete solutions.

Replacement Considerations

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