ev2910es-00a 5v/12v synchronous buck pwm dc/dc and linear power controller ev board ev2910es-00a rev. 1.0 www.monolithicpower.com 1 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. the future of analog ic technology description the ev2910es-00a is an evaluation board for the MP2910ES that is a dual output with one synchronous buck pwm and one linear controller. the part is used to generate logic- supply voltages for pc based systems. this ev board can be turned on or shut down via a remote en input that is referenced to ground. this input is compatible with popular logic devices. this ev board also has power good indicator to conform to intel? new platform requirement on fsb_vtt power plane. the pg port is pulled to ground when the output voltage is under 10% of its setting voltage. electrical specifications parameter symbol value units input voltage v in 5 ? 20 v output voltage v out 3.3 v output current i out 10 a features ? 5v or 12v v cc supply voltage ? wide 5v to 20v operating input range ? 10a output current ? fixed 300khz frequency ? internal soft-start ? output adjustable from 0.8v to 0.9xv in applications ? graphic card ? motherboard, desktop servers ? ia equipments ? telecomm equipments ? high power dc-dc regulators ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. ev2910es-00a evaluation board board number mps ic number ev2910es-00a MP2910ES
ev2910es-00a ?5v/12v synchronous buck pwm dc/dc and linear power controller ev board ev2910es-00a rev. 1.0 www.monolithicpower.com 2 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. evaluation board schematic
ev2910es-00a ?5v/12v synchronous buck pwm dc/dc and linear power controller ev board ev2910es-00a rev. 1.0 www.monolithicpower.com 3 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. ev2910es-00a bill of materials qty ref value description package manufacturer manufacturer p/n 2 c1, c5 1000f electrolytic cap. 25v dip rubycon 1000uf/25v 2 c2, c4 10f ceramic cap. 25v, x7r 1210 murata grm32dr71e106ka12 1 c3 1f ceramic cap. 25v, x7r 1206 tdk c3216x7r1e105k 1 c6 470f electrolytic cap. 16v dip rubycon 470f 2 c7,c10 1f ceramic cap. 25v, x7r 0603 murata grm188r71e105ka12 1 c8 0.1f ceramic cap. 50v, x7r 0603 murata grm188r71h104ka93d 2 c9, c12 1f ceramic cap. 50v, x7r 0805 murata grm21br71h105ka12l 2 c11, c13 ns do not stuff 0603 1 d1 0.5a, 40v schottky diode 0603 diodes inc b0540w 1 r1 4.02k ? film resistor ,1% 0603 yageo rc0603fr-074k02l 1 r2 8.06k ? film resistor, 1% 0603 yageo rc0603fr-078k06l 3 r3, r7, r10 0 ? film resistor ,5% 0603 yageo rc0603jr-070rl 1 r4 ns do not stuff 0603 1 r5 31.6k ? film resistor ,1% 0603 yageo rc0603fr-0731k6l 2 r6, r13 10k ? film resistor, 1% 0603 yageo rc0603fr-0710kl 1 r8 15k ? film resistor, 1% 0603 yageo rc0603fr-0715kl 2 r9, r14 10 ? film resistor, 1% 0603 yageo rc0603fr-0710rl 1 r11 100k ? film resistor, 1% 0603 yageo rc0603fr-07100kl 1 r12 20k ? film resistor, 1% 0603 yageo rc0603fr-0720kl 1 q3 ap4224, rdson:20m ? , qg:23nc so-8 apec ap4224gm 2 q2, q5 am4842n, rdson:12m ? ,qg:25nc so-8 analog power am4842n 2 q1, q4 nc do not stuff so-8 1 q6 nc do not stuff sot-23 1 l1 4.7h inductor, dcr=7.7m ? , irms=15a smd wurth 7443551470 1 u1 step-down regulator sop14 mps MP2910ES
ev2910es-00a ?5v/12v synchronous buck pwm dc/dc and linear power controller ev board ev2910es-00a rev. 1.0 www.monolithicpower.com 4 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 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
ev2910es-00a ?5v/12v synchronous buck pwm dc/dc and linear power controller ev board notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. ev2910es-00a rev. 1.0 www.monolithicpower.com 5 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. figure 5?bottom layer quick start guide 1. connect the positive and negative terminals of the load to the sv out (or/and lv out ) and gnd pins, respectively. 2. preset a power supply 1# output between 5v and 20v, and another power supply 2# output 5v or 12v, then turn off them. 3. connect the positive and negative terminals of the power supply 1# output to the vin and gnd pins, and connect the positive and negative terminals of the power supply 2# output to the vcc and gnd pins, respectively. 4. to use the enable function, add a mosfet or transistor for q 6 , and then apply a digital input to the en pin. drive en higher than 2v to turn off the controller or less than 0.4v to turn it on. 5. turn the power supplies on. the mp2910 will automatically startup. 6. use r5 and r6 to set the output voltage with vfb = 0.8v. follow the application information section in the device datasheet to select the proper value of r5, r6, inductor and output capacitor values when output voltage is changed.
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