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FEATURES

DESCRIPTION

APPLICATIONS

TPS65014

SLVS551 – DECEMBER 2004

POWER AND BATTERY MANAGEMENT IC

FOR LI-ION POWERED SYSTEMS

•

Linear Charger Management for Single Li-Ion

The TPS65014 is an integrated power and battery

or Li-Polymer Cells

management IC for applications powered by one

Li-ion or Li-polymer cell and which require multiple

•

Dual Input Ports for Charging From USB or

power rails. The TPS65014 provides two highly

From Wall Plug, Handles 100-mA / 500-mA

efficient, step-down converters targeted at providing

USB Requirements

the core voltage and peripheral, I/O rails in a

•

Charge Current Programmable via External

processor-based system. Both step-down converters

Resistor

enter a low power mode at light load for maximum

efficiency across the widest possible range of load

•

1-A, 95% Efficient Step-Down Converter for

currents. The LOW_PWR pin allows the core con-

I/O and Peripheral Components (VMAIN)

verter to lower its output voltage when the application

•

400-mA, 90% Efficient Step-Down Converter

processor goes into deep sleep. The TPS65014 also

for Processor Core (VCORE)

integrates two 200-mA LDO voltage regulators, which

•

2x 200-mA LDOs for I/O and Peripheral

are enabled via the serial interface. Each LDO

Components, LDO Enable via Bus

operates with an input voltage range between 1.8 V

and 6.5 V, allowing them to be supplied from one of

•

Serial Interface Compatible With I

the step-down converters or directly from the battery.

100-kHz, 400-kHz Operation

The TPS65014 also has a highly integrated and

•

LOW_PWR Pin to Lower or Disable Processor

flexible Li-Ion linear charger and system power man-

Core Supply Voltage in Deep Sleep Mode

agement.

It

offers

integrated

USB-port

and

•

70-µA Quiescent Current

ac-adapter supply management with autonomous

•

1% Reference Voltage

power-source selection, power FET and current

sensor, high accuracy current and voltage regulation,

•

Thermal Shutdown Protection

charge status, and charge termination.

The TPS65014 charger automatically selects the

•

All Single Li-Ion Cell-Operated Products

USB-port or the ac-adapter as the power source for

Requiring Multiple Supplies Including:

the system. In the USB configuration, the host can

increase the charge current from the default value of

– PDA

maximum 100 mA to 500 mA via the interface. In the

– Cellular/Smart Phone

ac-adapter configuration, an external resistor sets the

– Internet Audio Player

maximum value of charge current.

– Digital Still Camera

The battery is charged in three phases: conditioning,

•

Digital Radio Player

constant current, and constant voltage. Charge is

•

Split Supply DSP and µP Solutions

normally terminated based on minimum current. An

internal charge timer provides a safety backup for

charge termination. The TPS65014 automatically

restarts the charge if the battery voltage falls below

an internal threshold. The charger automatically en-

ters sleep mode when both supplies are removed.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.