Demonstration Circuit 799 is a high efficiency synchronous Buck-Boost converter using the LTC3442. The input range is from 2.4V to 5.5V, making it ideal for single-cell Lithium-Ion or three-cell NiCd/NiMH battery applications. The output voltage is set at 3.3V. For 2.7V minimum input voltage, this converter can provide up to 1.2A load current. A different output voltage in the range of 2.4V to 5.25V can be obtained by changing one of the feedback resistors.