EV8763D-L-00A high efficiency, 12a, 18v synchronous step-down converter evaluation board EV8763D-L-00A rev.1.0 www.monolithicpower.com 1 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. the future of analog ic technology description the EV8763D-L-00A is an evaluation board for the mp8763dgl, a high efficiency monolithic synchronous step-down converter with output discharge function. the ev board can deliver 12a continuous load current over a wide 8v to 18v operating input range. high efficiency can be achieved over a wide output current load range. constant-on-time (cot) control mode provides fast transient response and eases loop stabilization. this ev board can be turned on or shut down via a remote on/off input that is referenced to ground. this input is compatible with popular logic devices. electrical specification paramete r symbol v alue units input voltage v in 8 ? 18 v output voltage v out 1.8 v output current i out 12 a features ? wide 8v to 18v operating input range ? 12a output current ? low r ds (on) internal power mosfets ? proprietary switching loss reduction technique ? adaptive cot for ultrafast transient response ? programmable soft start and shutdown time ? pre-bias start up ? programmable switching frequency from 200khz to 1mhz ? non-latch ocp, ovp protection and thermal shutdown ? output adjustable from 0.611v to 13v ? available in a qfn3x4 package applications ? storage ? set-top boxes ? xdsl modem/dslam ? samll-cell base stations ? personal video recorders ? flat panel television and monitors ? distributed power systems a ll mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. EV8763D-L-00A evaluation board (l x w x h)85.5 mm x 85.5mm x 1.6 mm) board number mps ic number EV8763D-L-00A mp8763dgl 50 55 60 65 70 75 80 85 90 95 100 0.01 0.1 1 10 100
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 2 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evaluation board schematic ns c7 1 c1b 0.1 c1c 220nf c6 1 c5 ns c8 499k r5 100k r6 634k r7 100k r8 1 c1a vin vin gnd en pgood vcc 0.1 c1d 0.1 c3 82pf c4 4.7 r3 2m r4 20k r1 10k r2 2k r9 1 l1 gnd 1 2 ns c2a vout sw 1 vout 1 gnd1 4 c2b 4 c2c 4 c2d 0.1 c2e fb sw gnd sw sw 15, 16 pgn d in vcc 7 ag n d 5 freq 2 fb 3 ss 4 en 1 pg 6 bst 8 9,14 mp8763d in pgn d 10,11,12,13 u1 mp8763d
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 3 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. EV8763D-L-00A bill of materials qty ref value description package manufacture part number 2 c1a, c1b 10 f ceramic capacitor; 35v;x7r;1210; 1210 murata grm32er7ya106ka12l 4 c1c, c1d, c2e, c3 0.1 f ceramic capacitor; 50v;x7r;0603 0603 murata grm188r71h104ka93d 0 c2a ns poscap 3 c2b, c2c, c2d 47 f ceramic capacitor; 6.3v;x5r;1206 1206 tdk c3216x5r0j476m 1 c4 82pf ceramic capacitor; 50v;cog;0603 0603 murata grm1885c1h820ja01d 1 c5 1 f capacitor;25v;x7r 0603 murata grm188r71e105ka12 1 c6 220nf ceramic capacitor; 25v;x7r;0603 0603 murata grm188r71e223ja01d 0 c7, c8 ns 0603 1 l1 1 h inductor;1 h; 1.35mohm;32a smd wurth 7443330100 1 r1 20k film resistor;1% 0603 yageo rc0603fr-0720kl 1 r2 10k film resistor;1%; 0603 yageo rc0603fr-0710kl 1 r3 4.7 ? film resistor;5% 0603 yageo rc0603jr-074r7l 1 r4 2m film resistor;5%; 0603 yageo rc0603jr-072ml 1 r5 499k film resistor;1% 0603 yageo rc0603fr-07499kl 2 r6, r8 100k film resistor;1%; 0603 yageo rc0603fr-07100kl 1 r7 634k film resistor;1% 0603 yageo rc0603fr-07634kl 1 r9 2k film resistor;1%; 0603 yageo rc0603fr-072kl 1 u1 step down converter qfn16 3x4 mps mp8763dgl
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 4 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results performance waveforms are tested on the EV8763D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 1h, t a = +25oc, unless otherwise noted. 0.01 0.1 1 10 50 55 60 65 70 75 80 85 90 95 100 0.01 0.1 1 10 100 -1 -0. 8 -0. 6 -0. 4 -0. 2 0 0.2 0.4 0.6 0.8 1 024681012 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 8 9 10 11 12 13 14 15 16 17 18 0 500 1000 1500 2000 2500 3000 100
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 5 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the EV8763D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 1h, t a = +25oc, unless otherwise noted. v in ac coupled 50mv/div. v sw 5v/div. v out ac coupled 50mv/div. i l 5a/div. v in ac coupled 50mv/div. v sw 10v/div. v out ac coupled 50mv/div. i l 5a/div. v in ac coupled 200mv/div. v sw 10v/div. v out ac coupled 50mv/div. i l 10a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 10a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 10a/div. v en 1v/div. v pg 5v/div. v out 1v/div. v en 1v/div. v pg 5v/div. v out 1v/div.
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 6 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the EV8763D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 1h, t a = +25oc, unless otherwise noted. v en 2v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 10a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 10a/div. i out 5a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v sw 10v/div. i l 10a/div. v sw 10v/div. v out 1v/div. i l 2a/div. v sw 10v/div. v out 1v/div. i l 10a/div. v sw 10v/div. v out 1v/div. i l 2a/div. v out (ac) 20mv/div. v out 1v/div.
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board EV8763D-L-00A rev.1.0 www.monolithicpower.com 7 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2 ? top layer figure 3?inner layer 1 figure 4 ? inner layer 2 figure 5 ? bottom layer
EV8763D-L-00A ? 12a, 18v synchronous step-down converter ev board notice: the information in this document is subject to change without notice. please contact mps for current specifications. users should warrant and guarantee that third party intellectual property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV8763D-L-00A rev.1.0 www.monolithicpower.com 8 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 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 8v 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 mp8763dglwill automatically startup. 5. to use the enable function, apply a digital input to the en pin. drive en higher than 2v to turn on the regulator or less than 0.4v to turn it off. 6. use r1 and r2 to set the output voltage with vfb = 0.611v. follow the application information section in the device datasheet to select the proper value of r1, r2, inductor and output capacitor values when output voltage is changed. 7. if lower ripple at light loads is needed, then use 1.2 h or 1.5 h l1. but with the larger l1, the transient response peak to peak value will become larger too.
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