1 Features

• Two 400-mA Step-Down Converters
• Up to 92% Efficiency
• V_IN Range for DC-DC Converter
  From 3.3 V to 6 V
• 2.25-MHz Fixed-Frequency Operation
• Power Save Mode at Light Load Current
• Output Voltage Accuracy in PWM Mode ±1.5%
• 100% Duty Cycle for Lowest Dropout
• 180° Out-of-Phase Operation
• 1 General Purpose 200-mA LDO
• V_IN Range for LDO From 1.7 V to 6.0 V
• Available in a 16-Ball DSBGA (WCSP) With 0.5-mm Pitch

2 Applications

• Digital Cameras
• Portable Media Players
• Handheld Equipment

3 Description

The TPS65705x devices are small power management units targeted for embedded camera module or other portable low-power consumer-end equipments. The device contains two highly efficient step-down converters, a low dropout linear regulator, and additional supporting functions. The 2.25-MHz step-down converter enters a low-power mode at light load for maximum efficiency across the widest possible range of load currents. For low-noise applications, the device can be forced into fixed-frequency PWM mode using the MODE pin. The device allows the use of small inductors and capacitors to achieve a small sized solution. The TPS65705x provides an output current of up to
400 mA on both DC-DC converters and integrates one 200-mA LDO with different output settings. The LDO operates with an input voltage range from 1.7 V to 6 V, thus allowing it to be supplied from the output of the step-down converter or directly from the system voltage.

The TPS65705x comes in a small 16-pin wafer chip scale package (WCSP) with 0.5-mm ball pitch.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Application Circuit