800 mA 2.5 MHz, high efficiency dual mode buck-boost DC-DC converter

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  • Operating input voltage range from 2.4 V to 5.5 V
  • ± 2% output voltage tolerance over process and temperature
  • 2.5 MHz switching frequency
  • 50 μA max. quiescent current

The STBB2 is a fixed frequency, high efficiency, buck-boost DC-DC converter which provides output voltages from 1.2 V to 4.5 V starting from input voltage from 2.4 V to 5.5 V. The device is suitable for single Li-Ion, multi-cell alkaline or NiMH applications where the output voltage is within the battery voltage range. The low-RDS(on) N-channel and P-channel MOSFET switches are integrated and help to achieve high efficiency. The device also includes soft-start control, thermal shutdown, and current limit.

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  • Typical efficiency higher than 90%
  • Bypass power save function
  • Selectable output voltage with dedicated VSEL pin
  • Very fast line and load transients
  • Power save mode (PS) at light load
  • Flip Chip 20 bumps 0.4 mm pitch 2.1 x 1.8 mm
  • Memory card supply