The LP8727 is designed to provide automatic multiplexing switches between Micro/Mini USB
connector and USB, UART and Audio paths in cellular phone applications. It also contains a
single-input Li-Ion battery charger and an overvoltage-protected LDO. Programming is handled via an
I2C-compatible Serial Interface allowing control of charger,
multiplexing switches, and reading status information of the device.
The multiplexing switches on USB and UART support high-speed USB, and Audio inputs can be
driven to negative voltage rail. The LP8727 is compatible with USB charging specifications rev 1.1
from USB IF.
The Li-Ion charger requires few external components and integrates the power FET.
Charging is thermally regulated to obtain the most efficient charging rate for a given ambient
temperature. It has Overvoltage Protection (OVP) circuit at the charger input protects the PMU from
input voltages up to +28V, eliminating the need for any external protection circuitry.
An overvoltage-protected LDO which can supply up to 50 mA is designed for powering up a
low-voltage USB transceiver or waking up a PMU (Power Management Unit) when an external power
source (either USB VBUS or wall adapter) is connected to the USB connector.
The LP8727 PMU is available in 25-bump 0.4 mm pitch thin DSBGA package (2.015 mm x 2.015
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