LP3923TLX/NOPB

Power Management - Specialized Overview

The LP3923TLX/NOPB is a specialized Power Management IC (PMIC) designed for cellular phone applications, specifically CDMA handsets. It integrates a high-efficiency synchronous buck regulator with an output current of 700 mA, eight low-dropout (LDO) linear regulators, and a battery charger. The device operates within a temperature range of -40°C to +125°C and is housed in a 30-DSBGA package.

Power Management - Specialized Feature Summary

• Integrates a high-efficiency synchronous magnetic buck regulator
• Includes eight dedicated low-dropout linear regulators
• Features an integrated battery charging circuit

Power Management - Specialized Applications

• CDMA handset power management
• Cellular phone system integration
• Portable communication device power distribution

Power Management - Specialized Procurement Notes

Verify the obsolete status of this component before design initiation. Confirm that the specific pinout and electrical characteristics match the target application requirements. Ensure compatibility with existing PCB layouts if replacing older designs. Check for available alternative components from the manufacturer's portfolio.

Power Management - Specialized Selection Notes

Select this component for legacy CDMA mobile phone designs requiring integrated power management. Consider newer alternatives like the TPS65235 for improved efficiency and lower static current if the application allows for fewer LDOs and no integrated charger. Evaluate thermal performance given the DSBGA package constraints.

Power Management - Specialized Part Context

This part belongs to the LP3923 series of PMICs from Texas Instruments. It is distinct from other series like the LP8720 or LP38692, which serve different voltage regulation needs. The LP3923 is specifically tailored for the complex power sequencing and regulation demands of early 2G/3G cellular devices.

Power Management - Specialized Replacement Considerations

The TPS65235 is a documented alternative, though it offers fewer LDOs and lacks an integrated charger while providing better efficiency.