evq20051-q-00a low noise, high psrr, 1a linear regulator ev board evq20051-q-00a rev. 1.0 www.monolithicpower.com 1 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. the future of analog ic technology description the evq20051-q-00a evaluation board demonstrates the performance of mpq20051, a low noise and low dropout linear regulator. it operates from 2.5v to 5.5v input voltage and the output voltage can be set externally which ranges from 0.8v to 5v. the evq20051-q-00a can supply up to 1a of load current, and features current limiting, over temperature protection. an internal pmos pass element is used to allow a low 110 a ground current, marking the mpq20051 suitable for battery-power devices. electrical spec ifications paramete r symbol v alue units input voltage v in 2.5 ? 5.5 v output voltage v out 1.1 v load current i out 1 a features ? up to 1a output current ? low 140mv dropout at 1a ? adjustable output from 0.8v to 5v ? 63db psrr at 1khz ? 13 vrms low noise output ? very fast transient responses ? current limit and thermal protection applications ? notebook computers ? cordless telephones ? cellular phones ? modems ? hand-held instruments ? pda and palmtop computers a ll mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. mps? and ?the future of analog ic technology? are registered trademarks of monolithi c power systems, inc. evq20051-q-00a evaluation board (l x w x h) 2.5? x 2.5? x 0.4? (6.35cm x 6.35cm x 1.1cm) board numbe r mps ic numbe r evq20051-q-00a MPQ20051DQ
evq20051-q-00a ? low noise, 1a linear regulator evq20051-q-00a rev. 1.0 www.monolithicpower.com 2 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evaluation board schematic vin 2.5v - 5.5v gnd 7 vin vin u1 mpq20051 nc en fb gnd 4 3 2 1 1.1v vout gnd c3 560pf r2 10k r1 3.74k vout vout 6 5 8 r3 100k en evq20051-q-00a bill of materials qty ref value description package manufacturer part number 1 c1 2.2uf ceramic cap., 6.3v, 10%, x5r 0603 murata grm188r60j225ke19d 1 c2 4.7uf ceramic cap., 6.3v, 10%, x5r 0603 murata grm188r60j475ke19d 1 c3 560pf ceramic cap., 50v, 5%, np0 0603 murata grm1885c1h561ja01j 1 r1 3.74k ? film res., 1% 0603 yageo rc0603fr-073k74l 1 r2 10k ? film res., 1% 0603 yageo rc0603jr-0710kl r3 100k ? film res., 1% 0603 yageo rc0603jr-07100kl 1 u1 linear regulator qfn8 mps MPQ20051DQ 4 vin, vout, gnd test point test point 2x2.54mm hz china market 1 en test point test point test point hz china market
evq20051-q-00a ? low noise, 1a linear regulator evq20051-q-00a rev. 1.0 www.monolithicpower.com 3 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results v in =2.3v, v out =1.1v, t a =25oc unless otherwise noted. load regulation 1.790 1.794 1.798 1.802 1.806 1.810 0.0 0.2 0.4 0.6 0.8 1.0 output current ( a ) output voltage ( v ) v in =3.3v v in =2.2v v in =5v line regulation 1.794 1.798 1.802 1.806 1.810 2.0 2.5 3.0 3.5 4.0 4.5 5.0 input voltage ( v ) output voltage ( v ) i out =0.1a i out =0.5a dropout 0 40 80 120 160 200 0.0 0.2 0.4 0.6 0.8 1.0 output current ( a ) voltage dropout ( mv ) v out =3.3a load regulation 1.090 1.092 1.094 1.096 1.098 1.100 0.0 0.2 0.4 0.6 0.8 1.0 output current ( a ) output voltage ( v ) v in =3.3v v in =2.2v v in =5v line regulation psrr i out =10ma 1.090 1.092 1.094 1.096 1.098 1.100 2.0 2.5 3.0 3.5 4.0 4.5 5.0 input vol tag e ( v ) output voltage ( v ) i out =0.1a i out =0.5a -30 -20 -10 0 10 20 30 40 50 60 70 0.0 0.1 1.0 10.0 100.0 1000.0 frequency ( khz ) gain ( db ) current limit ( a ) current limit vs. t a i q current vs. t a v fb voltage ( v ) v fb voltage vs. t a 0.60 0.66 0.72 0.78 0.84 0.90 -40 -10 20 50 80 110 140 1.8 1.9 2.0 2.1 2.2 2.3 -40 -10 20 50 80 110 140 50 90 130 170 210 250 -40 -10 20 50 80 110 140
evq20051-q-00a ? low noise, 1a linear regulator evq20051-q-00a rev. 1.0 www.monolithicpower.com 4 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results (continued) v in =2.3v, v out =1.1v, t a =25oc unless otherwise noted.
evq20051-q-00a ? low noise, 1a linear regulator evq20051-q-00a rev. 1.0 www.monolithicpower.com 5 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. printed circuit board layout figure 1?top layer and top silk layer figure 2?bottom layer figure 3?top silk layer
evq20051-q-00a ? low noise, 1a linear regulator notice: the information in this document is subject to change without notice. users should warrant 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. evq20051-q-00a rev. 1.0 www.monolithicpower.com 6 5/4/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. quick start guide (adjustable output) the output voltage of this board is set externally which ranges from 0.8v 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 1.1v. 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 (2.5v v in 5.5v) and input ground to the vin and gnd pins respectively. 3. to enable the mpq20051, apply a voltage 1.5v v en 5.5v, to the en pin. to disable the mpq20051, apply a voltage, v en < 0.4v, to the en pin. the en pin can be connected to v in with a 100k ? resistor for automatic startup. 4. the output voltage v out can be changed by varying r1. calculate the new value by formula: out fb v r1 r2( 1) v = ? where v fb = 0.8v and r2 = 10k ? . example: for v out = 1.1v: 1.1 r1 10k ? 1 3.75k ? 0.8 ?? =?= ?? ?? therefore, use a 3.74k ? standard 1% value. figure 4
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