TPS2140, TPS2141

TPS2150, TPS2151

SLVS399A − JANUARY 2002 − REVISED MAY 2006

ADJUSTABLE LDO AND SWITCH WITH DUAL CURRENT LIMIT FOR

USB HIGHPOWER PERIPHERAL POWER MANAGEMENT

1

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FEATURES

USB High-Power Peripherals

Enable and 325 mA (Typ) Current Limit

Current Limit

LDO and Switch

3.3-V Switch and 5-V Switch

APPLICATIONS

− ADSL Modems

− Digital Still and PC Cameras

− Zip Drives

− Speakers

DESCRIPTION

The TPS2140/41/50/51 is a USB 1.0 and 2.0

Specification-compatible IC containing a dual-current-

limiting power switch and an adjustable low dropout

regulator (LDO). Both the switch and LDO limit inrush

current by controlling the turnon slew rate. The unique

dual-current-limiting feature of the switch allows USB

peripherals to utilize high-value capacitance at the

output of the switch, while keeping the inrush current

low. During turnon, the switch limits the current

delivered to the capacitive load to less than 100 mA.

When the output voltage from the switch reaches about

93% of the input voltage, the switch power good output

goes high, and the switch current limit increases to

800mA (minimum), at which point higher current loads

can be turned on. The higher current limit provides short

circuit protection while allowing the peripheral to draw

maximum current from the USB bus.

The switch and LDO function independently, providing

flexibility in DSP applications requiring separate core

and I/O voltages. For example, in a DSP application

operating from a 3.3-V rail, the LDO can supply the DSP

core voltage down to 0.9 V, while the switch powers the

3.3-V (typical) DSP I/O supply. If supply sequencing is

required, the LDO power good output can be used to

enable the switch.

AVAILABLE OPTIONS

TARGET

PACKAGE

PACKAGED DEVICES

TA

DESCRIPTION

TARGET

APPLICATION

PACKAGE

AND PIN

COUNT

ACTIVE LOW

(SWITCH)

ACTIVE HIGH

(SWITCH)

−40

°C to 85°C

Adjustable LDO and 3.3 V switch with dual current

limit

DSP

HTSSOP-14

TPS2140IPWP

TPS2150IPWP

−40

°C to 85°C

Adjustable LDO and 5 V switch with dual current

limit

USB

HTSSOP-14

TPS2141IPWP

TPS2151IPWP

NOTE: All options available taped and reeled. Add an R suffix (e.g., TPS2140IPWPR)

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

 2000−2006, Texas Instruments Incorporated

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. USB is a trademark of Universal Serial Bus Association.

All other trademarks are the property of their respective owners.