Power Electronics

2.25-MHz, 1-A DC-DC Converter for USB-Powered Applications

Texas Instruments Incorporated (TI) introduced the smallest 2.25-MHz DC-DC converter for USB-powered portable applications and wireless modems. The TPS62750 is a high-performance, 92 percent power-efficient, synchronous step-down converter, which can provide up to 1-A typical input current. The device supports an input voltage from 2.9 V to 6 V, allowing it to support batteries with an extended voltage range and USB-compliant power requirements.

Besides its small size, the TPS62750 offers a high degree of performance and efficiency. The device's unique Power Save Mode operates at light load currents over the entire load current range. In addition, the converter can discharge during shutdown.

Key features of the TPS62750:
* Programmable average current limiting for USB applications (50 mA to 300 mA for low current; 0.3 A to 1.3 A for high current)
* +/-10 percent current accuracy
* Input voltage monitoring prevents USB host from crashing
* Hot plug, load disconnect, short circuit (Vin/Vout) protection
The TPS62750 is available in volume now from TI and its authorized distributors in a 10-pin, 2.5 mm x 2.5 mm SON package. Suggested resale pricing is $1.20 in 1,000-unit quantities.

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