TPS62751DSKR

高效率降压型转换器，用于USB应用 High Efficiency Step-Down Converter for USB Applications

DESCRIPON

The TPS6275x device is a highly efficient synchronous step down dc-dc converter optimized for USB powered portable applications. It can provide up to 1300mA average input current and is ideal for applications connected to a USB host.

With an input voltage range of 2.9 V to 6.0V, the device supports batteries with extended voltage range and is ideal for powering USB applications where USB compliance is required.

FEATURES

• Efficiency > 90% at Nominal Operating Conditions

• Programmable Average Input Current Limits for USB Applications

   – 50mA to 300mA for Low Current Limit Range

   – 300mA to 1.3A for High Current Limit Range

   – ±10% Current Accuracy

• Stable Output Voltage for Load Transients to Minimize Overshoot at Load Step Response

• Hot Plug and Reverse Current Protection

• Automatic PFM/PWM Mode transition TPS62750

• Forced PWM for Noise Sensitive Applications TPS62751

• VIN Range From 2.9V to 6V

• Adjustable VOUT From 0.8V to 0.85×VIN

• Softstart for Inrush Current Prevention

• 2.25 MHz Fixed Frequency Operation

• Short Cicruit and Thermal Shutdown Protection

• Available in a 2.5 × 2.5 10 pin SON Package

APPLICATIONS

• USB Wireless Modems

• Portable USB peripherals

• Handheld Computers