ver: 0.2 jul 26, 2010 tel: 886-3-5788833 http://www.gmt.com.tw 1 g5754/G5754A global mixed-mode technology inc. 2a step-down dc/dc features ? 2a output current ? 0.18 internal power mosfet switch ? stable with low esr output ceramic capaci- tors ? up to 95% efficiency ? 30a shutdown mode ? fixed 380khz frequency ? thermal shutdown ? cycle-by-cycle over current protection ? wide 4.75v to 24v operating input range ? output adjustable from 1.22v to 21.6v(g5754) ? output adjustable from 0.92v to 21.6v(G5754A) ? available in sop-8 package applications ? pc monitors ? dsl modems ? distributed power systems ? pre-regulator for linear regulators general description the g5754/G5754A is a monolithic step-down switch mode regulator with a built in internal power mosfet. it achieves 2a continuous output current over a wide input supply range with excellent load and line regulation. current mode operation provides fast transient re- sponse and eases loop stabilization. fault condition protection includes cycle-by-cycle cur- rent limiting, output short circuit protection and thermal shutdown. in shutdown mode the regulator draws 30a of supply current. programmable soft-start over- writes the internal soft-start for various requirement of output power up ramp and minimizes the inrush supply current at initial startup. the g5754/G5754A r equires a minimum number of readily available standard external components. it is available in a sop-8 package. ordering information order number marking temp. range package (green) g5754p11u g5754 -40 c to +85 c sop-8 G5754Ap11u G5754A -40 c to +85 c sop-8 note: p1: sop-8 1: bonding code u : tape & reel pin configuration typical application circuit sop-8 g5754/G5754A in 8 6 5 1 2 3 4 ss / nc bs lx en comp fb gnd 7 output 2.5v/2a r1 10.5k 1% l1 15h d1 4 6 c5 10nf 5 7 bs in en ss / nc lx fb comp gnd g5754 c1 10f 25v c2 22f/6.3v ceramic r2 10k 1% on c3 4.7nf r3 7.5k c6 open input 12v off 2 3 8 1 c4 10nf / open not used output 2.5v/2a r1 17.2k 1% l1 15h d1 4 6 c5 10nf 5 7 bs in en ss / nc lx fb comp gnd G5754A c1 10f 25v c2 22f/6.3v ceramic r2 10k 1% on c3 4.7nf r3 7.5k c6 open input 12v off 2 3 8 1 c4 10nf / open not used sop-8 g5754/G5754A in 8 6 5 1 2 3 4 ss / nc bs lx en comp fb gnd 7 output 2.5v/2a r1 10.5k 1% l1 15h d1 4 6 c5 10nf 5 7 bs in en ss / nc lx fb comp gnd g5754 c1 10f 25v c2 22f/6.3v ceramic r2 10k 1% on c3 4.7nf r3 7.5k c6 open input 12v off 2 3 8 1 c4 10nf / open not used output 2.5v/2a r1 17.2k 1% l1 15h d1 4 6 c5 10nf 5 7 bs in en ss / nc lx fb comp gnd G5754A c1 10f 25v c2 22f/6.3v ceramic r2 10k 1% on c3 4.7nf r3 7.5k c6 open input 12v off 2 3 8 1 c4 10nf / open not used
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