S0380-02

2.2 H

m

1.8-V to

5.25-V Input

10 F

m

IN

EN

ILIM

GND

R

ILIM

PGND

POWER PAD

USB

FAULT

ENUSB

AUX

SW

R

FAULT

120 F

m

(1)

5 V USB Power

22 F

m

Data

Data

5 V Auxiliary Load

Power, 100 mA

(2)

USB FAULT Flag

5 V USB

Port #1

500 mA

5 V USB

Port #2

500 mA

TYPICAL APPLICATION CIRCUIT

IO(AUX) − Output Auxiliary Current − mA

0.77

0.79

0.81

0.83

0.85

0.87

0.89

0.91

0.93

0.95

0.97

0

300

600

900

1200

1500

G001

VIN = 1.8 V

VIN = 4.5 V

VIN = 3.3 V

TPS2500, TPS2501

www.ti.com

SLVS886C – OCTOBER 2008 – REVISED AUGUST 2010

INTEGRATED USB POWER SWITCH WITH BOOST CONVERTER

Check for Samples: TPS2500, TPS2501

1

FEATURES

APPLICATIONS

•

Portable Applications Using Single Li+ Cell

23

•

Integrated Synchronous Boost Converter and

USB Current-Limit Power Switch

•

USB Hosts Without Native 5-V Supplies

•

Light-Load, High-Efficiency Eco-mode™

DESCRIPTION

Control Scheme (TPS2500) or Constant

Frequency (TPS2501)

The TPS2500 and TPS2501 provide an integrated

solution to meet USB 5-V power requirements from a

•

1.8-V to 5.25-V Input Voltage (2.2-V Minimum

1.8-V to 5.25-V input supply. The features include a

Start-Up Voltage)

Hi-Speed USB compliant power output, output switch

•

Adjustable USB Current Limit

enable, current limit, and overcurrent fault reporting.

–

130 mA to 1400 mA (Typical)

The 1.8-V to 5.25-V input can be supplied by sources

•

Accurate 20% Current Limit at 1.4-A Setting

including dc/dc regulated supplies (e.g., 3.3 V), or

•

Powers up to Two Standard USB Ports

batteries such as single-cell Li+ or three-cell NiCd,

NiMH, or alkaline.

•

Auxiliary 5.1-V Output

•

Fast Overcurrent-Response Time – 5 ms

The USB power-switch current limit is programmable

Typical

via an external resistor from as low as 130 mA to as

high as 1400 mA (typical). Two standard USB ports

•

Small 3-mm × 3-mm × 0.9-mm SON-10 Package

can be supported from a single TPS2500 or TPS2501

•

15-kV / 8-kV System-Level ESD Capable

at the 1400-mA setting.

•

UL Listed - File No. E169910

Additionally, the boost converter output is available as

an auxiliary 5.1-V output to power additional loads.

The total current supplied by the USB output and the

auxiliary cannot exceed 1148 mA at VIN = 3 V.

BOOST EFFICIENCY

vs

OUTPUT AUXILIARY CURRENT

(1)

Requirement for USB applications only;

downstream

facing

ports

should be

bypassed with 120 mF minimum per hub.

(2)

Additional current can be supplied from

AUX if <1 A is required for USB ports;

total current should not exceed 1.1 A at

VIN = 3 V.

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.

2

Eco-mode, PowerPAD are trademarks of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2010, 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.