The FP6722 is a high efficiency hysteretic current mode topology synchronous boost DC/DC converter which could operate from single/dual-cell NiCd, NiMH or alkaline battery such as input voltage below 0.75V. The converter output voltage can be adjusted from 1.8V to a maximum of 5.5V by an external resistor divider. Besides the converter includes a 0.5Ω N-channel MOSFET switch and 0.7Ω P-channel synchronous rectifier. So no external Schottky diode is required and could get better efficiency near 94%.
The FP6722 is available in a space-saving SOT-23-6 package for portable application.

• Low IQ, 5.5μA Max Quiescent Current
• Operating Input Voltage from 0.75V to 5.5V
• Feedback Voltage 500mV
• 500mA Switching Current Limit
• Hysteresis switching frequency
• Adjustable Output Voltage from 1.8V to 5.5V
• Input Under Voltage Lockout
• Very Low Shutdown Current at 0.2uA
• ± 2.6% Output Voltage Accuracy
• Output Overvoltage Protection
• Over-Temperature Protection
• Pass-Through Function during Shutdown
• SOT-23-6 Package