TPS62751 - 用于 USB 供电应用的具有可编程输入电流限制的 2.25MHz 降压转换器

TPS62751是TI德州仪器公司的一款转换器（集成开关）产品，TPS62751是用于 USB 供电应用的具有可编程输入电流限制的 2.25MHz 降压转换器，本站介绍了TPS62751的封装应用图解、特点和优点、功能等，并给出了与TPS62751相关的TI元器件型号供参考。

TPS62751 - 用于 USB 供电应用的具有可编程输入电流限制的 2.25MHz 降压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

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.

The TPS62750 operates at 2.25-MHz fixed switching frequency and enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range. The TPS62751 operates in Forced PWM mode allowing use in applications that are noise sensitive. An output discharge allows the load to discharge in shutdown.

The 10% accurate average input current limit can be programmed with an external resistor, allowing use in applications such as USB, where the current drawn from the bus must be limited to 500mA.

The TPS6275x allows the use of small inductors and capacitors to achieve a small solution size. The TPS6275x is available in a 2,5mm × 2,5mm 10-pin SON package.

产品特性

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

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