TI - Synchronous DC/DC boost converter saves space and cost in portable devices
Texas Instruments has introduced 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 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 as low as 130 mA to as high as 1400 mA, 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.
Key features and benefits of the TPS2500
* Integrated boost converter and switch saves space and optimizes designs
* Wide Vin range of 1.8 – 5.25V is optimized for single-cell Li-ion battery applications
* The auxiliary 5.1V output eliminates the need for additional 5V DC/DC supply
* Current limiting range from 0.13 – 1.4 A is the optimal current range for USB-powered applications
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