1FEATURES
2• USB Multiplexing Switches
– High-Speed USB on USB and UART Inputs
– Negative Voltage Rail on Audio Inputs
– Internal LDO for ID Detection and MIC Bias
– Compatible with USB Charging
Specification Rev. 1.1
– DSS Input for Default Switch Connection
– Low-Power MIC Standby Mode single•
Linear Charge with Single Input
– 28 OVP on VBUS Input
– High-Current Mode for Production Test
– Thermal Regulation
• Over-Voltage Protected LDO for USB
Transceivers and PMU Wakeup
• UVLO (Undervoltage Lock Out)
• Interrupt Request to Reduce SW Polling
– USB / ID Detection
– SEND / END Button Detection
– Mic Removal
– OVLO / UVLO on VBUS
– Charger Status
• Thermal Shutdown Protection
• I2C-compatible Serial Interface
• 25-Bump 0.4 mm Pitch Thin DSBGA Package

APPLICATIONS
• GSM, GPRS, EDGE, CDMA & WCDMA
handsets
• Portable Media Players / MP3 Players

DESCRIPTION
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 overvoltageprotected
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 mm).