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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