ev3414-j-00a 1.8a, 1mhz synchronous boost converter evaluation board ev3414-j-00a rev. 1.01 www.monolithicpower.com 1 10/9/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology description the ev3414-j-00a is a boost converter evaluation board for the mp3414, a synchronous, 1mhz fixed frequency, current mode step-up converter with output to input disconnect. the device can step up single-cell and two-cell alkaline, nicd, and nimh batteries up to 4v. it can startup from an input voltage as low as 0.8v and provides inrush current limiting as well as output short circuit protection. the output voltage also can be regulated when v in >v out , and the p-channel mos is no longer act as a low impedance switch. the ev3414-j-00a regulates the output voltage up to 3.3v from single cell aa battery without the uses of an external schottky diode. the mp3414 is offered in a tsot23-8 package. electrical specification parameter symbol value units input voltage v in 0.8-4 v output voltage v out 3.3 v features ? up to 96% efficiency ? true output load disconnect ? input range: 0.6v to 4v ? output range: 1.8v to 4v ? 0.8v low voltage start-up ? current mode control with internal compensation ? short-circuit protection ? true output disconnect from input ? v in >v out down mode operation ? high efficiency at light load conditions ? inrush current limit and internal soft-start ? 1mhz fixed frequency switching ? tiny external components application ? single-cell and two-cell alkaline, nicd, or nimh batteries powered products ? personal medical devices ? portable media players ? wireless peripherals ? handheld computers and smart phones all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. gps receivers ?monolithic power systems?, ?mps?, and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. ev3414-j-00a evaluation board board number mps ic number ev3414-j-00 a MP3414-J efficiency (%) 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 1000
ev3414-j-00a D 1.8a, 1mhz synchronous boost converter ev board ev3414-j-00a rev. 1.01 www.monolithicpower.com 2 10/9/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. evaluation board schematic 5 1 8 7 2 6 4 3 out vin gnd c1b ns r2 nc r6 nc r5 10 r3 365k r4 210k c5 nc r1 100k c4 nc c3 nc c2b ns gnd gnd en in in en nc pgnd agnd fb fb out sw sw u1 gnd gnd gnd en sw vout sense vout gnd gnd ev3414-j-00a bill of materials qty refdes value description package manufacturer manufactuer_p/n 1 c1a 10 f ceramic cap., 10v, x7r 1210 murata grm32dr71c106ka01l 1 c2a 47 f ceramic cap., 10v, x7r 1210 murata grm32er61a476ke20l 2 c1c, c2c 0.1 f ceramic cap., 50v, x7r 0603 murata grm188r71c104ka01d 5 c1b, c2b, c3, c4, c5 ns not stuff 1 r1 100k film res., 1% 0603 yageo rc0603fr-07100kl 1 r3 365k film res., 1% 0603 yageo rc0603fr-07365kl 1 r4 210k film res., 1% 0603 yageo rc0603fr-07210kl 1 r5 10 film res., 5% 0603 yageo rc0603jr-0710r0l 2 r2, r6 ns not stuff 20mohm dcr, 2.5a smd wurth 744062003 20mohm dcr, 2.5a smd tdk slf7045t-3r3m2r5-pf 1 l1 3.3 h 21mohm dcr, 2.57a smd toko d63cb-#a916cy-3r3m 1 u1 step-up converter tsot23-8 mps MP3414-J
ev3414-j-00a D 1.8a, 1mhz synchronous boost converter ev board ev3414-j-00a rev. 1.01 www.monolithicpower.com 3 10/9/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in = 1.8v, v out = 3.3v, l = 3.3h, t a = 25c, unless otherwise noted. v out_ac 50mv/div. v in 1v/div. v out_ac 50mv/div. i out 100ma/div. v out_ac 100mv/div. i out 200ma/div. v out 2v/div. v sw 2v/div. v en 2v/div. i l 500ma/div. v out 2v/div. v sw 2v/div. v en 2v/div. i l 500ma/div. v out_ac 100mv/div. v in 1v/div. v out_ac 50mv/div. v sw 2v/div. i l 500ma/div. v out_ac 10v/div. v sw 2v/div. i l 1a/div.
ev3414-j-00a D 1.8a, 1mhz synchronous boost converter ev board ev3414-j-00a rev. 1.01 www.monolithicpower.com 4 10/9/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. printed circuit board layout figure 1?top layer figure 2?bottom layer figure 3?top silk layer
ev3414-j-00a D 1.8a, 1mhz synchronous boost converter 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. ev3414-j-00a rev. 1.01 www.monolithicpower.com 5 10/9/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. quick start guide the output voltage of this board is set to 3.3v. the board layout accommodates most commonly used inductors and output capacitors. 1. preset power supply to 0.8v v in 4v; 2. turn off the power supply; 3. connect power supply terminals to positive (+): in negative (-): gnd 4. connect load to: positive (+): out negative (-): gnd 5. connect the en to ? 0.8*v in power supply, or connect the en to vin. positive (+): en negative (-): gnd 6. turn on the power supply; 7. the output voltage v out can be adjusted by changing r4. and the value of r4 can be calculated by the following formula: fb out fb v r4 r3 vv ?? ?? ?? ? ?? where v fb =1.21v and r3=365k ? for example, if v out =3.3v 1.21 r4 365k 211.3k 3.3 1.21 ?? ??? ? ? ?? ? ?? therefore use a 210k ? resistor. 8. the v out in the evb is set to 3.3v, if other output is need the r4 can be changed.
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