ver: 0.2 jan 17, 2013 tel: 886-3-5788833 http://www.gmt.com.tw 1 g2105 global mixed-mode technology 7-channel dc-dc converter for dsc features ? 95% efficient dc/dc converter. ? highly integrated 7-ch dc/dc with integrated power mosfets. ? ch1, ch2, ch6 and ch7 boost-type synchro- nous rectified current-mode pwm converters with true-shutdown function. ? ch2 buck(g2105b) or boost(G2105A) for all bat- tery application. ? 6 channel built-in synchronous rectified cur- rent-mode pwm converters, 1 channel built-in non-synchronous rectified current-mode pwm converters. ? low power consumption (sleep mode) <10a. ? built-in short-circuit protection (scp) and over current protection (ocp) for mosfets. ? built-in under voltage lock out (uvlo) and over load protection (olp). ? built-in soft-start function. ? selectable ch7 boost type with open led pro- tection or current regulation type led driver. ? built-in power on/off sequence control. ? fixed 2mhz(ch1~ch4) / 1mhz(ch5~ch7) oper- ating frequency. ? all channel with internal compensation ? all power switches integrated ? built-in rtc ldo. ? build-in thermal shutdown (tsd, 150 c ). applications ? dsc power supply general description the g2105 provide a complete power supply solution for digital cameras. they improve performance, com- ponent count, and size compared to other multi-channel controllers in 2-cell aa(G2105A), 1-cell li-ion(g2105b), and multi-battery designs. on-chip mosfets provide up to 92~95% efficiency for critical power supplies. all channels dc/dc operate at fixed 2mhz(ch1~ch4)/ 1mhz(ch5~ch7) operating fre- quency to optimize size, cost, and efficiency. the g2105 is available in 32-pin tqfn (4x4) pack age. ordering information order number marking temp. range package (green) G2105Ak11u 2105a -20 c to +85 c tqfn4x4-32 g2105bk11u 2105b -20 c to +85 c tqfn4x4-32 note: k1: tqfn4x4-32 1: bonding code u: tape & reel pin configuration lx7 vout7 fb7 ctl1 note: recommend connecting the thermal pad to the ground for excellent power dissipation. G2105A tqfn4x4-32 1 2 3 4 5 6 18 19 20 21 22 23 30 25 27 29 28 9 10 11 12 thermal pad 7 13 14 17 31 8 15 16 24 32 ctl7 ctl5 fb5 pvcc5 lx5 vout5 fb6 ctl6 fb3 v08 vcc bat fb2 pok vout2 lx3 lx1 pvcc1 lx6 vout6 fb4 pvcc4 lx4 ctl234 lx2 pvcc2 26 fb1 pvcc3 lx7 vout7 fb7 ctl1 g2105b tqfn4x4-32 1 2 3 4 5 6 18 19 20 21 22 23 30 25 27 29 28 9 10 11 12 thermal pad 7 13 14 17 31 8 15 16 24 32 ctl7 ctl5 fb5 pvcc5 lx5 vout5 fb6 ctl6 fb3 v08 mode bat fb2 rtcldo_p rtcldo_o lx3 lx1 pvcc1 lx6 vout6 fb4 pvcc4 lx4 ctl234 lx2 pvcc2 26 fb1 pvcc3 ch1 synchronous rectified current mode step-up g2105 ch2 synchronous rectified current mode step-up(G2105A)/ step-down(g2105b) ch3 synchronous rectified current mode step-down ch4 synchronous rectified current mode step-down ch5 (ccd inv) current mode inverting ch6 (ccd bst) synchronous rectified current mode step-up ch7 (led driver) synchronous rectified current mode step-up or current regulator type led driver lx7 vout7 fb7 ctl1 note: recommend connecting the thermal pad to the ground for excellent power dissipation. G2105A tqfn4x4-32 1 2 3 4 5 6 18 19 20 21 22 23 30 25 27 29 28 9 10 11 12 thermal pad 7 13 14 17 31 8 15 16 24 32 ctl7 ctl5 fb5 pvcc5 lx5 vout5 fb6 ctl6 fb3 v08 vcc bat fb2 pok vout2 lx3 lx1 pvcc1 lx6 vout6 fb4 pvcc4 lx4 ctl234 lx2 pvcc2 26 fb1 pvcc3 lx7 vout7 fb7 ctl1 g2105b tqfn4x4-32 1 2 3 4 5 6 18 19 20 21 22 23 30 25 27 29 28 9 10 11 12 thermal pad 7 13 14 17 31 8 15 16 24 32 ctl7 ctl5 fb5 pvcc5 lx5 vout5 fb6 ctl6 fb3 v08 mode bat fb2 rtcldo_p rtcldo_o lx3 lx1 pvcc1 lx6 vout6 fb4 pvcc4 lx4 ctl234 lx2 pvcc2 26 fb1 pvcc3 ch1 synchronous rectified current mode step-up g2105 ch2 synchronous rectified current mode step-up(G2105A)/ step-down(g2105b) ch3 synchronous rectified current mode step-down ch4 synchronous rectified current mode step-down ch5 (ccd inv) current mode inverting ch6 (ccd bst) synchronous rectified current mode step-up ch7 (led driver) synchronous rectified current mode step-up or current regulator type led driver
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