• 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

• Mobile Phones, Smart Phones
• Low Power DSP Supply
• Portable Media Players
• Point-of-Load (POL) Applications

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.