ver: 0.6 sep 09, 2009 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5110 global mixed-mode technology inc. 600k/1.2mhz tft-lcd step-up dc-dc converter features ? 90% efficiency ? adjustable output from v in to 22v ? 4a, 0.125 , 22v power mosfet ? 2.5v to 5.5v input range ? 600khz/1.2mhz switching frequency ? tdfn3x3-10 package applications ? lcd displays ? portable applications ? hand-held devices general description the G5110 boost converter incorporate high-per- formance, current-mode, and frequency selectable pulse width modulation (pwm) circuitry with a built-in n-channel mosfet to provide a highly effi- cient regulator. the G5110 ? s frequency can be selected by user to operate at either 600khz or 1.2mhz. high switching frequency allows easily filtering and faster loop per- formance. an external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small, low esr ceramic output capacitors. the current-mode architecture provides fast transient response to pulsed loads. the internal n-channel mosfet can produce output voltage as high as 22v. user programmed soft-start with an external capacitor determines the input current ramp rate. the G5110 is available in a 10-pin tdfn3x3 package. ordering information order number marking temp. range package (green) G5110re1u 5110 -40 c to 85 c tdfn3x3-10 note :re: tdfn3x3-10 1: bonding code u: tape & reel pin configuration typical application circuit note: recommend connecting the thermal pad to the ground or let it keep floating. tdfn3x3-10 4 G5110 1 2 3 8 7 6 freq in 5 9 10 gnd tdfn3x3-10 4 1 2 3 8 7 6 shdn comp fb ss lx 5 9 10 gnd lx thermal pad in lx shdn fb G5110 l1 3.6 h v in 4.5v to 5.5v v out lx c4 4.7 f 25v c3 6.3v 10 f gnd gnd freq ss comp c9 10pf r2 27k r1 300k r3 100k c8 330pf d1 r4 10 c10 1 f c12 33nf c5 4.7 f 25v c6 4.7 f 25v note: recommend connecting the thermal pad to the ground or let it keep floating. tdfn3x3-10 4 G5110 1 2 3 8 7 6 freq in 5 9 10 gnd tdfn3x3-10 4 1 2 3 8 7 6 shdn comp fb ss lx 5 9 10 gnd lx thermal pad note: recommend connecting the thermal pad to the ground or let it keep floating. tdfn3x3-10 4 G5110 1 2 3 8 7 6 freq in 5 9 10 gnd tdfn3x3-10 4 1 2 3 8 7 6 shdn comp fb ss lx 5 9 10 gnd lx thermal pad in lx shdn fb G5110 l1 3.6 h v in 4.5v to 5.5v v out lx c4 4.7 f 25v c3 6.3v 10 f gnd gnd freq ss comp c9 10pf r2 27k r1 300k r3 100k c8 330pf d1 r4 10 c10 1 f c12 33nf c5 4.7 f 25v c6 4.7 f 25v
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