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MP2002 low input voltage 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 1 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. the future of analog ic technology descri ption the mp20 02 is a low-current, low-dropout linear regulator operating over a single input supply between 1.35v to 6.5v. the outp u t voltage of the mp200 2 is adjust able via an external resistor divid e r. the MP2002 can supply up to 500ma of load current. the enable pin (en) all o ws the pa rt to be put into a low current shut down mode (en=0). t he MP2002 features th ermal overl oad and current limit protection. it is availab l e in an 8-p i n qfn (2 x 3mm) packa ge features ? power good open collector output ? operates from 1.35v ? 6 . 5v input ? low 300mv dropout at 500ma outp ut ? stable with very small ceramic ca pacitors ? 2% feedback reference ? adjustable output voltage option from 0.5v to 5v using an external resistor divider ? better than 0.001%/ma load regulation ? low 100 a ground current ? internal the rmal protection ? current limit protection ? 6a typical quiescent current at shutdown ? available in a tiny 2x3mm 8-pin qf n package appli c ations ? low current regulators ? battery powered systems ? cellular phones f o r m p s g r e e n st at us, pl eas e vis it mp s we bs it e un de r q u al it y assu ra nce . ?mp s ? an d ?t he f u ture o f ana l o g ic t e chno lo gy ? ar e re gi ste r ed tr ade ma r ks o f monolithic power systems, inc. typical application MP2002 out fb gnd 8 5 3 1 4 6 in en pg v out r1 r2 v in power good 5v http://
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 2 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. ordering information part number* package top marking free air temperature (t a ) MP2002dd qfn8 (2x3 mm) l7 -40 c to +85 c * for tap e & reel, ad d suf f ix ?z (eg. MP2002 dd?z) for rohs co mpliant packaging, ad d su ffix ?lf (eg. MP2002 dd? l f?z ) package reference top view out nc pg fb 1 2 3 4 in nc gnd en 8 7 6 5 exposed pad on backside connect to gnd absolute m a xi mum ratings (1) in, pg, fb t o gnd.......................... -0.3v to +7v en to gnd ............................. -0.3v to v in +0.3v out ...................................... -0.3v to v in + 0.3v continuous power dissipation (t a = +25c) (2) ???? ? ???? ? ???? ? ???.2.27 w junction te mperature ............................... 150 c lead temperature .................................... 260 c storage temperature .............. -65c to +150 c recommended operating conditions (3) input voltag e v in ........................... 1.35v to 6.5v output voltage ................................... 0.5v to 5v load current ........................... 500ma maxi mum maxi mum j unction temp. (t j ) ................+125 c thermal resistance (4) ja jc qfn8 (2 x 3 mm) ..................... 55 ...... 12 ... c/w notes : 1) exceeding these ratings ma y da m age the device. 2) the ma ximum allowable po w e r dissipation is a fun c tion of the maximum junction tempe r ature t j (max), the junction-to- ambient therm a l resistance ja , a nd the a m bient t e mperatu r e ta. th e ma ximum allowable co ntinuous po w e r dissipation at an y ambient tem peratur e is calculated b y p d (max)=(t j (max)- t a )/ ja . exceedi ng the m a ximum allow a ble po w e r dissipation w ill cause ex cessive die temperature, and the reg u l ator w ill go into thermal sh utdo w n . inte rnal thermal shutdo w n circuitr y protects the device from perma ne nt damage. 3) the device is not guarant eed to function outside of its operating conditions. 4) measured on jesd51-7 4-layer board.
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 3 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. electri c al characteristi cs v in = 1.8v, v out = 1.2v, c out = 4.7f, c in = 2.2f, t a = +2 5 c, unless otherw ise noted. parameter sy mbol conditio n min t y p (5) max units operating vol t age i out = 1ma 1.35 6.5 v i out = 1ma (7) 100 a grou nd pin current i out = 500ma 5 ma shutdown cu rre nt v en = 1.45v, v in = 5v 7 a 0.482 0.500 0.508 fb regul atio n voltage ?40 c t a +85 c 0.477 0.495 0.513 v dro pout volta ge (8) i out = 500ma 290 mv line regulati on i out = 1ma , v in = (v out + 0.5v) to 6.5v (8) 0.005 %/v load reg ulat i on i out = 1ma to 500ma, v in = v out + 0.5v 0.001 %/ma powe r goo d output voltag e low (9) v ol i sink = 0.5ma 0.5 v en input hig h voltage 1.2 v en input low voltage 0.4 v en input bias current v en = 1.5v, 5 v 0.01 1 a therm a l prot ection 155 c curre n t limit 550 730 ma notes : 5) parameter is gua ranteed b y desig n, not prod uction tested. 6) resistor s for v out measurement are 10k, 14k, 1% 7) the gro und cur r e n t does not include current t h roug h feedback curre nt 8) dropout voltag e is defined as the input to output dif f erent ial w hen th e output voltage drops 1% b e lo w its nominal value 9) vfeedback is 90% of the regul ated value w i th 1 0 k pull-up to 5v
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 4 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. typical perfo r manc e characteristics c1=2.2 f, c2 =4.7 f, c3=1nf, t a = +25 c, unless otherwise noted. (reference figure 2) 3.33 3.32 3.31 3.30 3.29 3.28 load regulation v in =3.6v 3.83 3.32 3.3 3.30 3.29 3.28 0 3.5 3.9 4.3 4.7 5.1 5.5 line regulation 1.83 1.82 1.81 1.80 1.79 1.78 0 100 200 300 400 500 600 v in =2.5v v in =3.3v v in =5v 1.83 1.82 1.81 1.80 1.79 1.78 0 100 200 300 400 500 0 100 200 300 400 500 load regulation v in =2.5v 1.82 1.81 1.80 1.79 1.78 1.77 line regulation 1.808 1.804 1.800 1.796 1.792 1.788 v o (v) v o (v) v o (v) v o (v) 100 200 300 400 500 600 2.5 3.0 3.5 4.0 4.5 5.0 i load current (ma) i load current (ma) v in =5v 0.61 0.60 0.59 0.58 0.57 0.56 vo (v) 0 100 200 300 400 500 i load current (ma) i load current (ma) i load current (ma) load regulation v in =1.35v 0.63 0.62 0.61 0.60 0.59 0.58 vo (v) 1 2 3 4 5 6 input vol t age (v) input vol t age (v) input vol t age (v) line regulation 0.40 0.35 0.30 0.25 0.20 0.15 0.10 vdropout (v) 100 200 300 400 500 i load current(ma) v oltage dropout vs current v o =1.8v-3.3v v in =2.5v v in =3.3v v o (v) v o (v) 85 c load regulation -40 c load regulation
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 5 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. typical perfo r manc e characteristics c1=2.2 f, c2 =4.7 f, c3=1nf, t a = +25 c, unless otherwise noted. (reference figure 2) v o 50mv/div. v in 0.5v/div . 2 ms/div . line t ransient v in = 2v to 3v , v o = 1.8v , v en = v in , i load = 50ma, with resisitor load v o 100mv/div . i load 0.2a/div. load t ransient v in = 2.5v , v o = 1.8v , v en = v in , i load = 50 to 300ma, with resistor load pg 2v/div . v o 1v/div . i load 0.1a/div . 1ms/div . v in = 3.6v , v o = 1.8v , v en = v in , i load = 0.17a, with resisitor load en 2v/div . v o 0.5v/div . i load 0.2a/div. enable t urn on v in = 1.35v, v o = 0.6v, v en = 0 v to 3.6v, i load = 200ma, with resistor load en 2v/div . v o 0.5v/div . i load 0.2a/div. enable t urn off v in = 1.35v, v o = 0.6v, v en = 3.6v to 0v, i load = 200ma, with resistor load 90 80 70 60 50 40 30 20 10 0 psrr vs frequency power good off v fb (mv) -50 -20 10 40 70 100 0.1 1.0 10 100 1000 10000 tempera ture (c) v fb vs t emperature v in =1.8v , v en =v in, i load =1ma 10 9 8 7 6 5 495.0 494.5 494.0 493.5 493.0 492.5 492.0 1 2 3 4 5 6 input vol t age (v) input vol t age (v) frequency (hz) 170 160 150 140 130 120 1 2 3 4 5 6 supply current shut down current psrr (db)
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 6 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. typical perfo r manc e characteristics c1=2.2 f, c2 =4.7 f, c3=1nf, t a = +25 c, unless otherwise noted. (reference figure 2) pg 2v/div . v o 1v/div . i load 0.2a/div . 1ms/div . v in = 2.5v, v o = 1.8v, v en = v in , i load = 0.3a, with resistor load v in 2v/div . pg 5v/div . v o 1/div . i load 0.5/div. thermal protection v in = v en = 5v , v o = 1.8v, i load = 0.5a pg 2v/div . v o 1v/div . i load 1a/div. short circuit protection v in = 4v, v o = 1.8v, v en = v in pg 2v/div . v o 1v/div . i load 1a/div. short circuit recovery v in = 4v, v o = 1.8v, v in = v en power good on
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 7 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. pin functio n s operation the mp200 2 is a low-current, low-voltage, high- psrr, low-dropout, linear regulator. it is intended for use in devices that req uire very lo w voltage, low quiescent current power and high psrr such as wireless mode ms, p agers, and cellular pho nes. the MP2002 uses a p n p pass element and features int e rnal thermal shutdown and an internal curr ent limit circuit. v in pg gnd fb out en 5v pg 8 -- + -- + v out c2 r2 0.5v ref r1 r3 thermal protect c1 3 5 6 4 1 figure 1?block diagram of ultra low noise adjustable output reg u lator pin # nam e des c ription 1 out regulator output. out is the output of the linear regulator. bypass out to gnd with a 4.7 f or greater capacitor. 2 nc no connect. 3 pg power good open collector output 4 fb feedback input. connect a resistive voltage di vider from out to fb to set the output voltage. out feedback threshold is 0.5v. 5 en enable input. drive en hig her than 1.2v to turn on the MP2002, drive en lowe r than 0.4v to turn it off. 6 gnd, exposed pad grou nd. expose d pad mu st be co nne ct ed to gnd pl ane. 7 nc no connect. 8 in powe r source input. in su pplie s the inter nal p o wer t o the mp200 2 and is the source of the pass trans is tor. bypass in to gnd with a 2.2 f or greater capa citor.
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 8 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. appli c ation information setting the output voltage the MP2002 has an adjustable output voltage, set via an external resistor divider (r1 and r2 in figure 2). ? ? ? ? ? ? ? ? ? = fb fb out v v v 2 r 1 r where v fb = 0.5v (the out feedba ck thresho l d voltage.) exa m ple: for 2.5v output and r2=10k ? 2. 5 0 . 5 r1 1 0 k 4 0 k 0.5 ? ?? = = ?? ?? a standard 40k ? ( 1%) resistor can be selected for r1. table 1 list s the select ed r1 values for some typical outp u t voltages (assuming r2 = 10k ? ). pow e r good the power good pin is an open collector output completed with a pull up resistor (10k ? recommend ed). the pull up resistor can be tied to a supply within the voltage rang e of the pin (0v to 5.5v). for example, the pull up resistor can be tied to the input voltage when it is being monitored by an ic p o wered fro m this input voltage. it monitors the output voltage, and if the output voltage is 10 % below it s regulation point, the p g pin becomes low. table 1?a d j u s t a b l e o u t p u t v o l t age r1 values (r2=10k ? ) v out (v) r1 ( ? ) 1.25 15k 1.5 20k 1.8 26k 2 30k 2.5 40k 2.8 46k 3 50k 3.3 56k 4 70k 5 90k by pass capacitors for lower n oise, the reference voltage can be bypassed by an external capacitor. a low esr capacitor, such as the ceramic type, will provide the best performance.
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 9 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. pcb la y o u t guide pcb layout is very important to achieve good regulation, ripple rejection, transient response and thermal perfo rmance. i t is highly recommend ed to duplicate evb layout for optimum performance. if change is ne cessar y , please f o llow these guidelines a nd take figu re 2 for reference. 1) input and output bypass ceramic capacitors are suggest ed to be put close to th e in pin and out pi n respective ly. 2) ensure all f eedback co nnections a r e short and direct. place the fe edback re sistors and compensation components as clo s e to the chip as po ssible. 3) connect in, out a nd especia lly gnd respectively to a large copper area to cool the chip to improve thermal performance and long-term reliability. MP2002 out fb gnd 8 5 3 1 4 6 in en pg 1.8v c2 c3 c1 r1 r2 v in pg r3 in c3 c1 out gnd r3 pg nc en fb gn d nc in ou t 6 7 8 1 2 3 4 5 c2 r1 r2 top la y e r bottom la y e r figure 2?pcb la y out
MP2002 ? l o w input voltage, 500ma linear regulator MP2002 rev. 1. 11 www.monolithicpower.com 10 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. typical application circui t MP2002 out fb gnd 8 5 3 1 4 6 in en pg 1.8v c3 1nf v in pg figure 3?ty pical appl ication circuit w i th fix pinout
MP2002 ? l o w input voltage, 500ma linear regulator notice: t he i n formatio n in this docum ent i s subject to chang e w i t h o u t notice. users sh oul d w a rra nt and gu arante e that third part y int e ll ectu al prop ert y r i g h ts are n o t inf r ing ed u p o n w hen i n tegr atin g mps product s into an y ap p licatio n. mps w i ll not assume a n y le gal res pons ib ili t y for an y sai d app licati ons. MP2002 rev. 1. 11 www.monolithicpower.com 11 10/10/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. package informati o n qfn8 (2mm x 3mm) side view top view bottom view 2.90 3.10 1.90 2.10 0.00 0.05 pin 1 id mark ing 1.70 0.50 0.25 recommended land pattern 2.90 note : 1) a l l dimensions ar e in millimeters. 2) exposed paddle size does not include mold flash. 3) l e ad c o pl ana rity sh all be 0.10 mill imeter ma x. 4) d rawing conf orms to jed e c mo-229, v a riation vced-2. 5) drawing is not to scale. 1.60 0.70 pin 1 id option b r0.20 typ. detail a pin 1 id index area 1 8 5 4 1.65 1.85 1.5 0 1.70 0.50 bsc 0.18 0.30 pin 1 id see detail a 0.30 0.50 0.80 1.00 0.20 ref pin 1 id option a 0.30x45? typ.

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