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.