ev3410dj-00a 1.8v minimum input, 3.3v/300ma output synchronous boost converter ev board ev3410dj-00a rev. 1.1 www.monolithicpower.com 1 2/18/2011 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. the future of analog ic technology description the ev3410dj-00a is a mp3410 evaluation board that is configured to provide a regulated 3.3v output at up to 300ma from a 1.8v input or higher. the output voltage is adjustable from v in to 6v by changing resistors on the evaluation board. the high 500khz switching frequency of the mp3410 allows for smaller external components, producing a compact solution for a wide range of load currents. the internal compensation and soft-start features further reduce the component count. the p-channel synchronous rectified switch improves efficiency and isolates the output from the input in a shutdown condition. electrical specifications parameter symbol value units input voltage v in 1.8 ? 3.0 v output voltage v out 3.3 v output current i out 300 ma features ? 1.8v minimum input voltage ? 3.3v output voltage, adjustable from v in up to 6v ? output disconnect at shutdown mode ? 500khz switching frequency ? 0.1a shutdown current ? fully assembled and tested application examples ? mp3 players ? digital still and video cameras ? portable electronics using 2-3 alkaline cells or li-ion batteries ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. ev3410dj-00a evaluation board (l x w x h) 2.4? x 2.4? x 0.4? (6.2cm x 6.2cm x 1.1cm) board number mps ic number ev3410dj-00a MP3410DJ v in =1.8v v in =3v 100 80 60 40 20 0 efficiency (%) 1 100 10 1000 load current (ma) efficiency vs load current
ev3410dj-00a ? 1.8v minimum input, 3.3v/300ma output, synchronous boost ev3410dj-00a rev. 1.1 www.monolithicpower.com 2 2/18/2011 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. evaluation board schematic mp3410 sw fb out gnd en 4 3 1 2 5 vin en u1 ev3410dj-00a bill of materials qty ref value description package manufacturer: part no. distributor: part no. 2 c1,c2 10f ceramic capacitor, 6.3v, x5r 1206 tdk: c3216x5r0j106k digikey: 445-1388-1-nd 1 c3 not stuffed 1 d1 not stuffed 1 l1 4.7h inductor, 1.5a, smd, unshielded cooper: sd18-4r7 1 r1 178k ? resistor, 1% 0805 panasonic: erj-6geyj1783v digikey: p178kcct-nd 1 r2 100k ? resistor, 1% 0805 panasonic: erj-6geyj104v digikey: p100kcct-nd 1 r3 not stuffed 1 u1 mp3410 tsot23-5 mp3410
ev3410dj-00a ? 1.8v minimum input, 3.3v/300ma output, synchronous boost ev3410dj-00a rev. 1.1 www.monolithicpower.com 3 2/18/2011 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
ev3410dj-00a ? 1.8v minimum input, 3.3v/300ma output, synchronous boost 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. ev3410dj-00a rev. 1.1 www.monolithicpower.com 4 2/18/2011 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2011 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 1.8v v in 3.0v. 2. turn power supply off. 3. connect power supply terminals to: positive (+): vin, en negative (?): gnd 4. connect load to: positive (+): vout negative (?): gnd 5. turn power supply on after making connections. 6. the mp3410 is enabled on the evaluation board once v in is applied. to disable the mp3410, disconnect en from vin. 7. the output voltage v out can be changed by varying r1. calculate the new value using the formula: 2 r 1 v v 1 r fb out ? ? ? ? ? ? ? ? ? = where v fb = 1.2v and r2 = 100k ? for example, for v out = 5v ? = ? ? ? ? ? ? ? ? = k 7 . 316 k 100 1 v 2 . 1 v 5 1 r therefore use a 316k ? standard 1% value. for output voltages greater than 4v, it is recommended an external schottky diode, such as mbr0520l, be placed in parallel with the internal p channel mosfet (with the anode connected to sw and the cathode to out).
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