ver: 0.5 apr 01, 2013 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5759 global mixed-mode technology 400khz 4a synchronous step-down dc/dc features ? 4a output current ? stable with low esr output ceramic capaci- tors ? up to 90% efficiency ? 25a shutdown mode ? fixed 400khz frequency ? thermal shutdown ? cycle-by-cycle over current protection ? wide 7v to 18v operating input range ? available in dip-8 and sop-8 (fd) package applications ? pc monitors ? dsl modems ? distributed power systems ? pre-regulator for linear regulators general description the G5759 is a monolithic step-down switch mode regulator with a built in internal power mosfet. it achieves 4a 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 25a 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 G5759 r equires a minimum number of readily available standard external components. it is available in a dip-8 and sop-8 (fd) package. ordering information order number marking temp. range package (green) G5759z31u G5759 -40 c to +85 c dip-8 G5759f11u G5759 -40 c to +85 c sop-8 (fd) note: z3: dip-8 f1: sop-8 (fd) 1: bonding code u : tape & reel pin configuration typical application circuit output 5v/4a r1 52.5k 1% l1 15h 7/4 2/7 c5 0.1f 8/6,ep 3/8 bs in en lx fb comp gnd G5759 c2 22f/35v ceramic r2 10k 1% on c3 1.5nf r3 25k c6 open input 12v off 5/2 6/3 4/1 sop-8 (fd) G5759 in 8 6 5 1 2 3 4 en bs lx comp fb gnd vcc 7 note: recommend connecting the thermal pad to the ground for excellent power dissipation. thermal pad vcc c2 0.1f 1/5 c1 10f/35v ceramic dip-8 G5759 8 6 5 1 2 3 4 7 vcc fb comp en bs in lx gnd output 5v/4a r1 52.5k 1% l1 15h 7/4 2/7 c5 0.1f 8/6,ep 3/8 bs in en lx fb comp gnd G5759 c2 22f/35v ceramic r2 10k 1% on c3 1.5nf r3 25k c6 open input 12v off 5/2 6/3 4/1 sop-8 (fd) G5759 in 8 6 5 1 2 3 4 en bs lx comp fb gnd vcc 7 note: recommend connecting the thermal pad to the ground for excellent power dissipation. thermal pad vcc c2 0.1f 1/5 c1 10f/35v ceramic dip-8 G5759 8 6 5 1 2 3 4 7 vcc fb comp en bs in lx gnd
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