1FEATURES

23• Integrated Synchronous Boost Converter and

USB Current-Limit Power Switch

• Light-Load, High-Efficiency Eco-mode™

Control Scheme (TPS2500) or Constant

Frequency (TPS2501)

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

Start-Up Voltage)

• Adjustable USB Current Limit

– 130 mA to 1400 mA (Typical)

• Accurate 20% Current Limit at 1.4-A Setting

• Powers up to Two Standard USB Ports

• Auxiliary 5.1-V Output

• Fast Overcurrent-Response Time – 5 ms

Typical

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

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

• UL Listed - File No. E169910

APPLICATIONS

• Portable Applications Using Single Li+ Cell

• USB Hosts Without Native 5-V Supplies

DESCRIPTION

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 supply. The features include a

Hi-Speed USB compliant power output, output switch

enable, current limit, and overcurrent fault reporting.

The 1.8-V to 5.25-V input can be supplied by sources including dc/dc regulated supplies (e.g., 3.3 V), or

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

NiMH, or alkaline.

The USB power-switch current limit is programmable

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

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

can be supported from a single TPS2500 or TPS2501

at the 1400-mA setting.

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.