基于TI TPS6206x 的3MHz 高效2A DC电源转

基于TI TPS6206x 的3MHz 高效2A DC电源转换方案

TI 公司的TPS6206x 系列是3MHz 高效同步降压DC/DC电源转换器，输出电流高达2A。输入电压从3V到6V，效率高达97%。主要应用在POL，笔记本电脑，手持媒体播放器和DSP电源。本文介绍了TPS6206x 主要特性，方框图，典型应用电路以及评估板TPS62065-67EVM电路图和材料清单（BOM）。

The TPS6206x is a family of highly efficient synchronous step down DC-DC converters. They provide up to 2.0A output current.

With an input voltage range of 3.0V to 6V the device is a perfect fit for power conversion from a 5V or 3.3V system supply rail. The TPS6206x operates at 3MHz fixed frequency and enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range. The Power Save Mode is optimized for low output voltage ripple. For low noise applications, TPS62065 can be forced into fixed frequency PWM mode by pulling the MODE pin high. TPS62067 provides an open drain power good output.

In the shutdown mode, the current consumption is reduced to less than 1µA and an internal circuit discharges the output capacitor.

TPS6206x 主要特性：

3 MHz Switching Frequency

V_IN Range from 3.0V to 6V

Up to 97% Efficiency

Power Save Mode/3MHz Fixed PWM Mode

Power Good Output

Output Voltage Accuracy in PWM Mode ±1.5%

Output Capacitor Discharge Function

Typical 18 µA Quiescent Current

100% Duty Cycle for Lowest Dropout

Voltage Positioning

Clock Dithering
Supports Maximum 1mm Height Solutions

Available in a 2x2x0.75mm SON

TPS6206x 应用：

POL

Notebooks, Pocket PCs

Portable Media Players

DSP Supply

图1。TPS6206x方框图

TPS6206x 典型应用电路

图2。TPS62065 1.8V 可调输出电压电路图

图3。TPS62067 1.8V 可调输出电压电路图

评估板TPS62065-67EVM-347

The TPS62065-67EVM-347 is a fully assembled and tested pair of PCBs for evaluating the TPS62065 and TPS62067 2-A step-down converters. The EVM comes configured with both a TPS62065 IC and a TPS62067 IC; there are two PCBs, one for each respective step-down converter IC.

评估板TPS62065-67EVM-347主要特性：

• Input voltage range: 3.0 V to 6.0 V

• Adjustable output voltage: 0.8 V to VIN

• Up to 2.0-A output current

• 3-MHz switching frequency

• Power Good output (TPS62067EVM only)

• Clock dithering

图4。TPS62065EVM电路图

图5。TPS62067EVM电路图

TPS62065/67EVM材料清单（BOM）：