BAT

USB

DC_IN

EN

LOUT

VOUT

LiIon Battery

USB Port

DC Adapter

LDO

CAP

GND

Controller

Switched

Load

Always ON

Load

TPS22933

www.ti.com

SLVSB34

– OCTOBER 2011

Small, Triple-Input Power Multiplexer with Auto-Select and Low Drop-out Voltage

Regulator

Check for Samples: TPS22933

1

FEATURES

APPLICATIONS

•

Three Integrated Load Switches Automatically

•

Smart Phones

Choose Highest Input

•

GPS Devices

•

Integrated 3.6-V fixed LDO

•

Digital Cameras

•

Switched and Always on LDO Outputs

•

Portable Industrial Equipment

•

Small

µQFN package 1.5mm × 1.5mm

•

Portable Medical Equipment

•

Input Voltage Range: 2.5-V to 12-V

•

Portable Media Players

•

•

Portable Instrumentation

DESCRIPTION

•

50-mA Maximum Continuous Current

multiplexer with auto-input selection and a Low

•

Low Threshold Control Input (EN)

Drop-Out linear regulator. The device contains three

•

Switchover time 18-

µs Typical

P-channel MOSFETs that can operate over an input

voltage range of 2.5-V to 12-V. The TPS22933

automatically selects the highest level (from BAT,

TYPICAL APPLICATION

USB, and DC_IN) and enables that input to source

the LDO. LOUT is an always-on output from the LDO.

The Enable function (EN pin) allows VOUT to be

switched on or off, enables a quick discharge resistor,

and is capable of interfacing directly with low-voltage

control signals.

The TPS22933 is available in a small, space-saving

8-pin

µQFN

package

and

is

characterized

for

operation

over

the

free-air

temperature

range

of

–40ºC to 85ºC.

QUICK OUTPUT

MAXIMUM

OUTPUT VOLTAGE

VOUT ENABLE

at 5.0 V

DISCHARGE

OUTPUT CURRENT

TPS22933A

2.4

Ω

3.6 V

yes

50 mA

Active High

(1)

This feature discharges the output of the switch to ground through a 64-

Ω resistor, preventing the output from floating

1

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.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, 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.