ev8712-l-00a high efficiency,12a,18v, synchronous step-down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 1 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. the future of analog ic technology description the ev8712-l-00a is used for demonstrating the performance of mps?s mp8712. mp8712 is a highly integrated and high frequency synchronous step-down switch-mode converter. it offers a fully integrated solution to achieve a 12a continuous and 15a peak output current with excellent load and line regulation over a wide input supply range. cot control operation provides fast transient response and eases loop stabilization. an open drain power good pin indicates that the output voltage is in the nominal range. full protection features include over voltage, over-current protection and thermal shut down. the mp8712 is available in qfn- 14(3mmx4mm) package. electrical specification paramete r symbol v alue units input voltage v in 3? 18 v output voltage v out 1 v continuous output current i out 12 a peak output current i out 15 a features ? wide 3v-to-18v operating input range ? 12a continuous/15a peak output current ? 1% internal reference accuracy ? output adjustable from 0.6v ? 15m ? /4.5m ? high side/low side r ds(on) for internal power mosfets ? 500khz switching frequency ? external soft start ? open drain power good indication ? output over voltage protection ? hiccup ocp protection ? thermal shutdown ? qfn-14(3mmx4mm) package applications ? solid state driver (ssd) ? flat-panel television and monitors ? set-top boxes ? distributed power systems a ll mps parts are lead-free, halogen free, and adhere to the rohs directive. for mps green status, please visit mps website under quality a ssurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. . ev8712-l-00a evaluation board (4 layer pcb, 8.5cm 8.5cm) board number mps ic number ev8712-l-00a MP8712GL 0.01 0.1 1 10 100 60 64 68 72 76 80 84 88 92 96 100
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 2 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evaluation board schematic 6 7 13 12 1 2 499k r5 ns r6 ev8712-l-00a bill of materials qty ref value description package manufacturer manufacturer p/n 1 r1 80.6k film res,1% 0603 royal rc0603fr-0780k6l 1 r2 120k film res,1% 0603 royal rl0603fr-07120kl 1 r3 0 ? film res,1% 0603 royal rc0603fr-070rl 1 r4 10k film res,1% 0603 royal rl0603fr-0710kl 1 r5 499k film res,1% 0603 royal rl0603fr-07499kl 0 r6 ns 1 r7 100k film res,1% 0603 royal rl0603fr-07100kl 2 c1, c3 0.1 f ceramic cap, 25v,x7r 0603 murata grm188r71e104ka01d 2 c1a,c1b, 22 f ceramic cap,25v,x5r 1206 murata grm31cr61e226ke15l 4 c2,c2a, c2b,c2c 22 f ceramic cap 25v,x5r 0805 murata grm21br61e226me44l 0 c1c,c1d, c2d,c2e ns 1 c4 22pf ceramic cap, 50v, x7r 0603 murata grm1885c1h220ja01d 1 c5 0.47 f ceramic cap,16v,x7r 0603 murata grm188r71c474ka88d 1 c6 22nf ceramic cap,16v,x7r 0603 murata grm188r71c223ka01d 1 l1 1.5 h inductor, dcr=2.1m ? smd wurth 7443320150 1 u1 mp8712 step-down converter qfn14 (3*4) mps MP8712GL
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 3 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, f s = 500khz, t a = 25c, unless otherwise noted. reference voltage (mv) disabled supply current vs. input voltage v in uvlo rising vs. temperature reference voltage vs. temperature line regulation vs. input voltage v out =1v en rising threshold vs. temperature input voltage (v) input voltage (v) v in uvlo rising (v) en rising threshold (v) input voltage (v) enabled supply current vs. input voltage 100 150 200 250 300 350 400 450 500 0 1 2 3 4 5 6 7 8 -40-25-10 5 20 35 50 65 80 95110125 1.195 1.2 1.205 1.21 1.215 1.22 1.225 592 594 596 598 600 602 604 606 608 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 0.01 0.1 1 10 100 output current (a) -40-25-10 5 20 35 50 65 80 95110125 -40-25-10 5 20 35 50 65 80 95110125 3 6 9 121518 v in =4.5v v in =12v output current (a) output current (a) 60 64 68 72 76 80 84 88 92 96 100 v in =18v 0.01 0.1 1 10 100 v in =4.5v v in =12v 60 64 68 72 76 80 84 88 92 96 100 v in =18v 0.01 0.1 1 10 100 60 64 68 72 76 80 84 88 92 96 100 v in =4.5v v in =12v v in =18v 3456789101112131415161718 3456789101112131415161718 2.805 2.81 2.815 2.82 2.825 2.83 2.835 2.84 2.845 2.85 2.855 i out =0a i out =6a i out =12a
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 4 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, f s = 500khz, t a = 25c, unless otherwise noted. output current (a) load regulation vs. output current v out =1v output current (a) output current (a) output current (a) output current (a) -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v output current (a) load regulation vs. output current v out =1.2v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v output current (a) load regulation vs. output current v out =2.5v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v output current (a) load regulation vs. output current v out =1.8v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v output current (a) load regulation vs. output current v out =1.5v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v 0.01 0.1 1 10 100 60 64 68 72 76 80 84 88 92 96 100 0.01 0.1 1 10 100 v in =12v 60 64 68 72 76 80 84 88 92 96 100 0.01 0.1 1 10 100 60 64 68 72 76 80 84 88 92 96 100 0.01 0.1 1 10 100 v in =7v v in =12v 60 64 68 72 76 80 84 88 92 96 100 v in =4.5v v in =12v v in =18v v in =4.5v v in =18v v in =5v v in =18v v in =12v v in =18v
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 5 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, f s = 500khz, t a = 25c, unless otherwise noted. output current (a) case temperature rise vs. output current output current (a) load regulation vs. output current v out =5v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v output current (a) load regulation vs. output current v out =3.3v -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 024681012 v in =18v v in =4.5v v in =12v 0 5 10 15 20 25 30 35 40 45 50 02468101214
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 6 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, f s = 500khz, t a = 25c, unless otherwise noted. v out /ac 10mv/div. v in /ac 20mv/div. v sw 5v/div. i l 2a/div. v out /ac 10mv/div. v in /ac 20mv/div. v sw 10v/div. i l 2a/div. input/output ripple i out = 0a input/output ripple i out = 0a input/output ripple i out = 12a v out /ac 10mv/div. v in /ac 200mv/div. v sw 10v/div. i l 10a/div. shutdown through input voltage i out = 0a start-up through en i out = 0a v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 5a/div. shutdown through input voltage i out = 12a v out 500mv/div. v pg 5v/div. v in 5v/div. v sw 10v/div. i l 10a/div. v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 5a/div. start-up through input voltage i out = 0a start-up through input voltage i out = 12a v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 5a/div. v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 10a/div. start-up through en i out = 12a v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 10a/div.
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 7 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, f s = 500khz, t a = 25c, unless otherwise noted. shutdown through en i out = 0a v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 2a/div. shutdown through en i out = 12a v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 10a/div. v out /ac 50mv/div. i out 5a/div. load transient i out = 6a-12a short-circuit protection entry i out = 0a v out 1v/div. v pg 5v/div. v sw 10v/div. i l 10a/div. short-circuit protection recovery i out = 0a v out 1v/div. v pg 5v/div. v sw 10v/div. i l 10a/div. short-circuit protection steady state short output to gnd v out 1v/div. v pg 5v/div. v sw 10v/div. i l 10a/div.
ev8712-l-00a ? 12a high efficiency sync. step down converter ev8712-l-00a rev. 1.0 www.monolithicpower.com 8 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. printed circuit board layer mp8712 ev8712 figure 1: top silk layer figure 2: top layer figure 3: inner 1 layer figure 4: inner 2 layer figure 5: bottom layer
ev8712-l-00a ? 12a high efficiency sync. step down converter notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. ev8712-l-00a rev. 1.0 www.monolithicpower.com 9 6/29/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. quick start guide 1. connect the positive and negative terminals of the load to the vout and gnd pins, respectively. 2. preset the power supply output between 3v and 18v, and then turn off the power supply. 3. connect the positive and negative terminals of the power supply output to the vin and gnd pins, respectively. 4. turn the power supply on. the board will automatically start up. 5. to use the enable function, apply a digital input to the en pin. drive en higher than 1.5v to turn on the regulator, or less than 1.0v to turn it off.
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