ver: 0.1 jul 22, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5675 global mixed-mode technology inc. 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 power good opened drain output thermal shutdown cycle-by-cycle over current protection output adjustable from 0.6v to v in available in tdfn3x3-10 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 G5675 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. power good function delivers power supply ready signal to the l oad. 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 G5675 requires a minimum number of readily available standard external components. it is avail able in tdfn3x3-10 package. ordering information order number marking temp. range package (green) G5675re1u 5675 -40 c to +85 c tdfn3x3-10 note: re: tdfn3x3-10 1 : bonding code u : tape & reel pin configuration typical application circuit tdfn3x3-10 4 G5675 1 23 8 7 6 pvin svin 5 9 10 pg tdfn3x3-10 4 1 23 8 7 6 lx lx lx pvin nc 5 9 10 en fb thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation. svin fb lx gnd v in 2.2 h r1 40k w pvin 22 fx2 v out 1.8v/5a 20 f G5675 on off pg 10 w 0.1 f pgnd en 10k w r2 20k w v in tdfn3x3-10 4 G5675 1 23 8 7 6 pvin svin 5 9 10 pg tdfn3x3-10 4 1 23 8 7 6 lx lx lx pvin nc 5 9 10 en fb thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation. svin fb lx gnd v in 2.2 h r1 40k w pvin 22 fx2 v out 1.8v/5a 20 f G5675 on off pg 10 w 0.1 f pgnd en 10k w r2 20k w v in
|
