Texas Instruments Power Management - Specialized LP3923TL/NOPB-TI

The LP3923TL/NOPB-TI is a fully integrated power management unit (PMU) designed specifically for CDMA cellular phones. It features an integrated Li-Ion battery charger capable of charging currents from 50 mA to 1200 mA, with thermal regulation and over-voltage protection up to 28V. The device operates within an input voltage range of 3.0V to 5.5V. This PMU includes one high-efficiency synchronous buck regulator with a typical output current of 700 mA, and six low-noise low-dropout (LDO) regulators, providing output voltage accuracy of 2% (typical). The LDOs are designed for low noise, making them suitable for RF and analog applications. The buck regulator automatically switches to pulse frequency modulation (PFM) mode at low output currents to enhance efficiency. The LP3923 also supports an I¬=C-compatible interface for controlling LDO outputs and charger operation, along with features such as thermal shutdown, under-voltage lockout, and a compact 30-bump DSBGA package measuring 3.0 x 2.5 mm. This product is ideal for applications requiring efficient power management and extended battery life in mobile devices.