EV4420H-J-01A 2a, 36v, synchronous step down converter evaluation board EV4420H-J-01A rev.1.0 www.monolithicpower.com 1 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. the future of analog ic technology description the EV4420H-J-01A is an evaluation board for the mp4420h/mpq4420h, a high-frequency, synchronous, rectified, step-down, switch-mode converter with build-in power mosfets. it offers a very compact solution to achieve a 2a continuous output current with excellent load and line regulation over a wide input supply range. the mp4420h/mpq4420h has synchronous mode operation for higher efficiency over the output current load range. current-mode operation provides fast transient response and eases loop stabilization. full protection features include over-current protection and thermal shut down. the EV4420H-J-01A is assemble and tested with tsot23-8 package. electrical specifications parameter symbol value units input voltage v in 4-36 v output voltage v out 3.3 v output current i out 2 a features ? wide 4v to 36v continuous operating input range ? 90m ? /55m ? low rds(on) internal power mosfets ? high-efficiency synchronous mode operation ? default 410khz switching frequency ? synchronizes to a 200khz to 2.2mhz external clock ? high duty cycle for automotive cold-crank ? power-save mode ? internal soft-start ? power good ? ocp protection and hiccup ? thermal shutdown ? available in aec-q100 grade 1 ? fully assembled and tested applications ? automotive ? ? industrial control system ? distributed power systems all mps parts are lead-free, halogen free, and adhere to the rohs directive. for mps green status, please visit mp s website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. EV4420H-J-01A evaluation board (l x w x h) 2.5? x 2.5? x 0.2? (6.35cm x 6.35cm x0.5cm) board number mps ic number EV4420H-J-01A mpq4420hgj
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 2 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evaluation board schemetic 50v 0.1uf c3 0.1uf/16v c5 l2 4v-36v 22uf c7 20k r4 3.3v/2a 6.34k r5 10v vin en/sync vout gnd 4.7uf c2 50v 0.1uf/16v c4 4.7uf c1 100k r3 ns c6 0805 0402 0805 50v 0402 0402 0402 0402 0402 0402 0805 1m r1 20 r2 0402 0402 toko fdsd0420 4.7uh sw 3 en/sync 6 in 2 fb 8 vcc 7 bst 5 gnd 4 pg 1 u1 mpq4420h 100k r6 pg 0402 vemi gnd ns cin4 blm18pg330sn1 fb1 22uf cin5 10uh l1 10uf cin3 1nf cin1 47nf cin2 ? EV4420H-J-01A bill of materials qty. ref value description package manufacture manufacture_pn 2 c1, c2 4.7 f ceramic cap., 50v, x7s 0805 murata grm21bc71h475ke11l 1 c3 0.1 f ceramic cap., 50v, x7r 0402 tdk c1005x7r1c104k 2 c4, c5 0.1 f ceramic cap., 16v, x7r 0402 murata grm155r71c104ka88d 1 c7 22 f ceramic cap., 10v, x7s 0805 tdk c2012x7s1a226m125ac 1 cin1 1nf ceramic cap., 50v, x7r 0603 murata grm188r71h102ka01d 1 cin2 47nf ceramic cap., 50v, x7r 0603 murata grm188r71h473ka61d 1 cin3 10uf ceramic cap., 50v, x7r 1210 murata grm32er71h106ka12l 1 cin5 22 f electrolytic cap. smd jianghai vtd-63v22 2 c6, cin4 ns 1 fb1 magnetic bead, 3a 0603 murata blm18pg330sn1 1 l1 10 h inductor, 84m ? dcr, 3a smd coilcraft xal4040-103me inductor, 83m ? dcr, 3.6a smd toko fdsd0420 4.7uh 1 l2 4.7 h inductor, 40.1m ? dcr, 4.5a smd coilcraft xal4040-472me 1 r1 1m film res., 5% 0402 yageo rc0402jr-071ml 1 r2 20 film res., 1% 0402 yageo rc0402fr-0720rl 1 r3 100k film res., 1% 0402 yageo rc0402fr-07100kl 1 r4 20k film res., 1% 0402 yageo rc0402fr-0720kl 1 r5 6.34k film res., 1% 0402 yageo rc0402fr-076k34l 1 u1 step-down regulator tsot23-8 mps mpq4420hgj 5 vin, vemi, gnd, vout, gnd 2.0 golden pin hz 4 en/sync, gnd, pg, gnd 1.0 golden pin hz
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 3 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results v in = 12v, v out =3.3v, c out = 2x22f, l = 10h, t a = +25 ? c, unless otherwise noted.
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 4 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) v in = 12v, v out =3.3v, c out = 2x22f, l = 10h, t a = +25 ? c, unless otherwise noted.
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 5 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) v in = 12v, v out =3.3v, c out = 2x22f, l = 10h, t a = +25 ? c, unless otherwise noted.
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 6 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) v in = 12v, v out =3.3v, c out = 2x22f, l = 10h, t a = +25 ? c, unless otherwise noted.
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board EV4420H-J-01A rev.1.0 www.monolithicpower.com 7 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. printed circuit layout figure 1 ? top silk layer & top layer figure 2 ? in1 layer figure 3 ? in2 layer figure 4 ? bottom silk layer & bottom layer
EV4420H-J-01A ? 2a, 36v, synchronou s step down converter ev board 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. EV4420H-J-01A rev.1.0 www.monolithicpower.com 8 2/12/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. quick start guide 1. connect the positive and negative terminals of t he load to the vout and gnd pins respectively. 2. preset the power supply output to between 4v to 36v, and then turn it off. 3. connect the positive and negative terminals of t he power supply output to the vin and gnd pins respectively. 4. turn the power supply on. the mp4420h/m pq4420h will automatically startup. 5. to use the enable function, apply a digital input to the en pin. drive en higher than 1.65v to turn on the regulator, drive en less than 1.05v to turn it off. an internal 500k ? resistor from en/sync to gnd allows en/sync to be floated to shut down the chip. 6. connect the en input pin through a pull-up resi stor (r1) to any voltage connected to the v in pin. make sure r1 big enough to limit the en input current to less than 150 a. for example, with 12v connected to v in , make sure r1 (12v ? 6.5v) 150 a = 36.7k ? . connect the en pin directly to a voltage source without any pull-up resistor requires limiting voltage amplitude to 6v to prevent damage to the internal zener diode at en pin. 7. connect the en input pin with an external clock with a range of 200khz to 2.2mhz after output voltage is set to synchronize the internal clock rising edge to the external clock rising edge. the pulse width of external clock signal should be less than 1.7 s. 8. use r4 and r5 to set the output voltage with v fb =0.792v. for r4=20k ? , r5 can be determined by: 1 0.792 v r4 r5 out ? ? follow the application information section in the device datasheet to recalculate the compensation, inductor and output capacitor values when output voltage is changed.
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