描述

The TPS6226x device is a highly efficient synchronous step-down DC/DC converter. The TPS6226x provides up to 600-mA output current from a single Li-Ion cell， and is ideal for battery-powered applications such as mobile phones and other portable equipment.

With an wide input voltage range of 2 V to 6 V， the device also supports two- and three-cell alkaline batteries， 3.3-V and 5-V input voltage rails.

The TPS6226x 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 power save mode is optimized for low-output voltage ripple. For low noise applications， the device can be forced into fixed frequency pulse-width modulation (PWM) mode by pulling the MODE pin high. In the shutdown mode， the current consumption is reduced to less than 1 μA. The TPS6226x allows the use of small inductors and capacitors to achieve a small solution size.

The TPS6226x operates over a free air temperature range of –40°C to 85°C. It is available in a 5-pin SOT and a 6-pin 2-mm × 2-mm WSON package.

特性

High Efficiency Step-Down Converter Output Current up to 600 mA VIN  Range from 2 V to 6 V for Li-ion Batteries with 
Extended Voltage Range 2.25-MHz Fixed Frequency Operation Power Save Mode at Light Load Currents Output Voltage Accuracy in PWM Mode ±1.5% Typical 15-μA Quiescent Current 100% Duty Cycle for Lowest Dropout Voltage Positioning at Light Loads Available in a SOT (5) and 2-mm × 2-mm × 0.8- 
mm WSON (6) Package Allows < 1-mm Solution Height APPLICATIONS Mobile Phones， Smart Phones Low Power DSP Supply Portable Media Players Point-of-Load (POL) Applications

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采用 2x2mm SON/TSOT23 封装的 2.25MHz 600mA 降压转换器