ver: 1.0 sep 09, 2005 tel: 886-3-5788833 http://www.gmt.com.tw 1 g5931 global mixed-mode technology inc. switched capacitor voltage inverter features ? inverts input supply voltage ? 25ma output current with a voltage drop of 250mv ? 0.45ma quiescent current at 3.3v supply voltage ? 99% voltage conversion efficiency ? 1.8v to 5v operating range ? require only two capacitors ? over-temperature protection ? 8-pin sop package applications ? cell phone ? small lcd panels ? portable equipment ? handy-terminals, pdas ? battery-operated equipment general description the g5931 is an unregulated charge-pump voltage inverter which may be used to generate a negative supply from positive input. input voltages ranging from +1.8v to +5v can be inverted into a -1.8v to -5v out- put supply. the devices is ideal for both battery- pow- ered and board level voltage conversion applications with a typical operating current of 0.45ma at 3.3v supply. the g5931 can deliver 25ma output current with a voltage drop of 250mv. the parts are over -temperature protected. applications include cell phones, pdas, and other portable equipment. the devices is available in 8-pin sop package. ordering information order number marking temp. range package (pb free) g5931p1u g5931 -40c to 85c sop-8 note: p1 : sop-8 u: tape & reel pin configuration typical application circuit nc gnd cp- out in 1 2 4 v in (1.8v to 5v) c3 5 8 8 6 5 1 2 3 4 nc cp+ nc sop-8 g5931 7 gnd cp- in nc out nc nc cp+ 3 c1,c2,c3: 1f mlcc (x5r) 7 6 c1 c2 nc gnd cp- out in 1 2 4 v in (1.8v to 5v) c3 5 8 8 6 5 1 2 3 4 nc cp+ nc sop-8 g5931 7 gnd cp- in nc out nc nc cp+ 3 c1,c2,c3: 1f mlcc (x5r) 7 6 c1 c2
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