ev2004 5dq - 0 0 a low n oise, high psrr , 1a linear regulator ev board ev 20045dq - 0 0 a rev. 1.0 www.monolithicpower.com 1 5/2/2018 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2018 mps . all rights reserved. description the ev 2004 5dq - 00a evaluation board demonstrates the performance of mp20045 , a low noise, low dropout and high psrr linear regulator. it operates from a 2. 5v to 5.5v input voltage and the output voltage can be set externally which ranges from 1. 5v to 5v. the ev 2004 5dq - 00a can sup ply up to 1a of load current, and features current limiting , over temperature protection and power - good status. an internal pmos pass element is used to allow a low 110ua ground current , marking the mp20045 suitable for b attery - power devices. electrical specifica tion s parameter symbol value units input voltage v in 3.5 C 5.5 v output voltage v out 3 v load current i out 1 a features ? up to 1a output current ? low 14 0 mv dropout at 1a ? adjustable output ? 56 db psrr at 1 khz ? 13 v r ms low noise output ? open drain power - good status output ? v ery f ast t ransient r esponses ? current limit and thermal protection applications ? notebook computers ? cordless telephones ? cellular phones ? mode ms ? hand - held instruments ? pda and palmtop computers mps and the future of analog ic technology are registered trademarks of monolithic power systems, inc. ev2004 5dq - 0 0 a evaluation board (l x w x h) 2 . 5 x 2. 5 x 0.4 ( 6 . 35 cm x 6 . 35 cm x 1.1cm) board number mps ic number ev2004 5dq - 0 0 a mp2004 5dq
ev200 45dq - 0 0 a C low noise, high psrr , 1 a line regulator ev 20045dq - 0 0 a rev. 1.0 www.monolithicpower.com 2 5/2/2018 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2018 mps . all rights reserved. evaluat ion board schematic ev2004 5dq - 00a bill of materials qty ref value description package manufacturer part number 2 c1 ,c2 2.2uf ceramic capacitor,x7r,16v 0805 tdk c2012x7r1c225 k 1 c 3 10 0p f ceramic capacitor,cog,50v 0603 tdk c1608cog1h101j 2 cin,cout ns 2 r1,r2 10 k film res, 1% 0603 yageo rc0603fr - 0710 k l 2 r3,r4 100 k film res, 5% 0603 any 1 u1 ldo regulator qfn8 (3mm*3mm) mps mp20045 dq
ev200 45dq - 0 0 a C low noise, high psrr , 1 a line regulator ev 20045dq - 0 0 a rev. 1.0 www.monolithicpower.com 3 5/2/2018 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2018 mps . all rights reserved. printed circuit boar d layout figure 1 top layer figure 2 bottom layer figure 3 top silk layer
ev200 45dq - 0 0 a C low noise, high psrr , 1 a line regulator ev2004 5dq - 00a rev. 1.0 www.monolithicpower.com 4 5/2/2018 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. quick start guide (a djustable output) the output voltage of this board is set externally which ranges from 1.5v to 5v by operating from +2.5v to +5.5v input as the figure 4. the default output voltage of this board is set to 3.0v. the board layout accommodates most commonly used resistors and capacitors. 1. attach the positive and negative ends of the load to the vout and gnd pins, respectively. 2. attach the input voltage ( 3 .5v v in 5.5 v) and input ground to the vin and gnd pins, respectively. 3. to enable the mp2 0045 apply a voltage, 1.5 v v en 5.5 v, to the en pin. to disable the mp20045 apply a voltage, v en < 0. 4 v, to the en pin. the en pin can be connected to v in with a 100 k ? resistor for automatic startup. 4. the output voltage v out can be changed by varying r2. calculate the new value by formula: where vfb = 1.5v and r1 = 10 k?. example: for v out = 3.0v: therefore, use a 10k ? standard 1% value. figure 4 adjust version figure 5 fixed version 1 ) v v ( r1 r2 fb out ? ? 10k 1 ) 1.5 3.0 ( 10k r2 ? ? ?
ev200 45dq - 0 0 a C low noise, high psr r, 1 a line re gulator 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 i ntellectual p roperty r ights are not infringed upo n when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. ev2004 5dq - 00a rev. 1.0 www.monolithicpower.com 5 5/2/2018 mps proprietary information. unauthoriz ed photocopy and duplication prohibited. ? 2018 mps. all rights reserved. quick start guide (m odification for fixe d output) for modifying the ev 20045 d q - 00a to accommodate a fixed output voltage version of the mp2 0045 a s the figure 5 : 1. carefully remov e the ic(u1) and replace it with the corresponding fixed output version of the mp20045 chip . 2. remove both r1 and r2. 3. short r1 while leaving r2 open. 4. attach the positive and negative ends of the load to the vout and gnd pins, respectively. 5. attach the in put voltage ( 3 .5v v in 5.5 v) and input ground to the vin and gnd pins, respectively. 6. to enable the mp2 0045 apply a voltage, 1.5v v en 5.5v, to the en pin. to disable the mp20045 apply a voltage, v en < 0. 4 v, to the en pin. the en pin can be connected to v in with a 100 k ? resistor for automatic startup. please refer to the datasheet for the detailed information of the different output voltage option of mp2004 5 .
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