LP8727 Datasheet, PDF (1/33 Pages) Texas Instruments – Micro/Mini USB Interface with Integrated 28V Charger

LP8727
www.ti.com
SNVS898A – OCTOBER 2012 – REVISED MAY 2013
Micro/Mini USB Interface with Integrated 28V Charger
Check for Samples: LP8727
FEATURES
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•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
• 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 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 mm).
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated