Saving space in portable devices
Texas Instruments has introduced two new integrated products designed to provide power and protection for USB ports.
The TPS2500 and TPS2501 incorporate a boost switching regulator with an onboard current limiting switch designed to save space by providing an integrated solution that meets 5-V USB power requirements from a 1.8 – 5.25 V input.
The output current limit can be programmed via an external resistor from 130 to 1400mA, supporting up to two USB ports from a single device. According to TI, the onboard switching regulator is a synchronous boost converter with greater than 94% efficiency for 3.3V inputs at typical USB current ranges.
The TPS2500 features a pulse skipping mode for high efficiency at light loads, while the TPS2501 employs fixed frequency operation across the load range for EMI sensitive designs. Both devices are designed for battery powered portable devices, set top boxes, printers or any USB application without native 5V supply.
