DC755A - LTC3443EDE | 600kHz, Synchronous Buck-Boost Converter, 2.4V ≤ VIN ≤ 5.5V, 3.3Vout @ 1A

Demonstration Circuit 755 is a constant-frequency synchronous Buck-Boost converter using the LTC3443. The input range is from 2.4V to 5.5V, making it ideal for single-cell lithium-ion or threecell NiCd/NiMH battery applications. This converter provides up to 95% efficiency, much higher than traditional Buck-Boost converters. For 2.5V minimum input voltage, this converter can provide up to 1A load current. The output voltage is set at 3.3V. A different output voltage in the range of 2.4V to 5.25V can be obtained by changing one of the feedback resistors.