ver: 0.5 aug 12, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5676 global mixed-mode technology 5a synchronous step-down dc/dc features 5a output current * 75m w ww w internal power mosfet switch stable with low esr output ceramic capacitors or poscaps less than 1 a shutdown current 1mhz switching frequency thermal shutdown cycle-by-cycle over current protection output adjustable from 0.6v to v in available in sop-8 (fd) package *the output voltage should be less then 1.8v. if th e vout set- ting is larger then 1.8v, the output current will b e less then 5a because of thermal protection. applications nb distributed power systems pre-regulator for linear regulators general description the G5676 is a monolithic step-down switch mode regulator with a built in internal power mosfet. it achieves a continuous output current at 1mhz switch- ing frequency with excellent load and line regulatio n. current mode operation provides fast transient re- sponse and eases of loop stabilization. fault condition protection includes cycle-by-cycle cur- rent limiting, output short circuit protection and thermal shutdown. in shutdown mode the regulator ground current is controlled less than 1 a. an internal soft-start minimizes the inrush supply current at i nitial startup. the G5676 requires a minimum number of readily available standard external components. it is avail able in sop-8 (fd) package. ordering information order number marking temp. range package (green) G5676f11u G5676 -40 c to +85 c sop-8 (fd) note: f1: sop-8 (fd) 1 : bonding code u : tape & reel pin configuration typical application circuit nc 8 6 5 1 2 3 4 nc lx en pgnd pvin svin fb sop-8 (fd) G5676 7 thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation. gnd svin fb lx gnd v in 2.2 h r1 40k w pvin 22 fx2 v out 1.8v/5a 10 f G5676 on off 10 w 0.1 f pgnd en r2 20k w nc 8 6 5 1 2 3 4 nc lx en pgnd pvin svin fb sop-8 (fd) G5676 7 thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation. gnd svin fb lx gnd v in 2.2 h r1 40k w pvin 22 fx2 v out 1.8v/5a 10 f G5676 on off 10 w 0.1 f pgnd en r2 20k w
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