Synchronous DC/DC Boost Converter has Integrated Current-limiting Switch
(Product News, 23 Oct 2009 )
Texas Instruments Inc. (TI) has launched two 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 that saves space and cost by providing an integrated solution that meets 5V USB power requirements from a 1.8V to 5.25V input. The output current limit can be programmed via an external resistor from as low as 130mA to as high as 1.4A, supporting up to two USB ports from a single device.
The onboard switching regulator is a highly efficient synchronous boost converter, with greater than 94 percent 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.
