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MP2002 low input voltage 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 1 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. the future of analog ic technology description the MP2002 is a low-current, low-dropout linear regulator operating over a single input supply between 1.35v to 6.5v. the output voltage of the MP2002 is adjustable via an external resistor divider. the MP2002 can supply up to 500ma of load current. the enable pin (en) allows the part to be put into a low current shutdown mode (en=0). the MP2002 features thermal overload and current limit protection. it is available in an 8-pin qfn (2x 3mm) package features ? power good open collector output ? operates from 1.35v ? 6.5v input ? low 300mv dropout at 500ma output ? stable with very small ceramic capacitors ? 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 thermal protection ? current limit protection ? 6a typical quiescent current at shutdown ? available in a tiny 2x3mm 8-pin qfn package applications ? low current regulators ? battery powered systems ? cellular phones for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks 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
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 2 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication 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 tape & reel, add suffix ?z (eg. MP2002dd?z) for rohs compliant packaging, add suffix ?lf (eg. MP2002dd?lf?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 maxi mum ratings (1) in, pg, fb to 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) ??????????????????.2.27w junction temperature ...............................150 c lead temperature ....................................260 c storage temperature .............. -65c to +150 c recommended operating conditions (3) input voltage v in ...........................1.35v to 6.5v output voltage ...................................0.5v to 5v load current ...........................500ma maximum maximum junction temp. (t j ) ................+125 c thermal resistance (4) ja jc qfn8 (2 x 3mm) .....................55 ...... 12 ... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature ta. the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max)=(t j (max)- t a )/ ja . exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7 4-layer board.
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 3 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. electrical characteristics v in = 1.8v, v out = 1.2v, c out = 4.7f, c in = 2.2f, t a = +25 c, unless otherwise noted. parameter symbol condition min typ (5) max units operating voltage i out = 1ma 1.35 6.5 v i out = 1ma (7) 100 a ground pin current i out = 500ma 5 ma shutdown current v en = 1.45v, v in = 5v 7 a 0.482 0.500 0.508 fb regulation voltage ?40 c t a +85 c 0.477 0.495 0.513 v dropout voltage (8) i out = 500ma 290 mv line regulation i out = 1ma, v in = (v out + 0.5v) to 6.5v (8) 0.005 %/v load regulation i out = 1ma to 500ma, v in = v out + 0.5v 0.001 %/ma power good output voltage low (9) v ol i sink = 0.5ma 0.5 v en input high voltage 1.2 v en input low voltage 0.4 v en input bias current v en = 1.5v, 5v 0.01 1 a thermal protection 155 c current limit 550 730 ma notes: 5) parameter is guaranteed by design, not production tested. 6) resistors for v out measurement are 10k, 14k, 1% 7) the ground current does not include current through feedback current 8) dropout voltage is defined as the input to output different ial when the output voltage drops 1% below its nominal value 9) vfeedback is 90% of the regulated value with 10k pull-up to 5v
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 4 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. typical performanc 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 voltage (v) input voltage (v) input voltage (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) voltage 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 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 5 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. typical performanc 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 transient 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 transient 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 turn 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 turn 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 temperature (c) v fb vs temperature 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 voltage (v) input voltage (v) frequency (hz) 170 160 150 140 130 120 1 2 3 4 5 6 supply current shut down current psrr (db)
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 6 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. typical performanc 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 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 7 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. pin functions operation the MP2002 is a low-current, low-voltage, high- psrr, low-dropout, linear regulator. it is intended for use in devices that require very low voltage, low quiescent current power and high psrr such as wireless modems, pagers, and cellular phones. the MP2002 uses a pnp pass element and features internal thermal shutdown and an internal current 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 regulator pin # name description 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 higher than 1.2v to turn on the MP2002, drive en lower than 0.4v to turn it off. 6 gnd, exposed pad ground. exposed pad must be connected to gnd plane. 7 nc no connect. 8 in power source input. in supplies the inter nal power to the MP2002 and is the source of the pass transistor. bypass in to gnd with a 2.2 f or greater capacitor.
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 8 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. application 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 feedback threshold voltage.) example: for 2.5v output and r2=10k ? 2.5 0.5 r1 10k 40k 0.5 ? ?? = = ?? ?? a standard 40k ? ( 1%) resistor can be selected for r1. table 1 lists the selected r1 values for some typical output voltages (assuming r2 = 10k ? ). power good the power good pin is an open collector output completed with a pull up resistor (10k ? recommended). the pull up resistor can be tied to a supply within the voltage range 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 powered from this input voltage. it monitors the output voltage, and if the output voltage is 10% below its regulation point, the pg pin becomes low. table 1?adjustable output volt 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 bypass capacitors for lower noise, 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 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 9 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. pcb layout guide pcb layout is very important to achieve good regulation, ripple rejection, transient response and thermal performance. it is highly recommended to duplicate evb layout for optimum performance. if change is necessary, please follow these guidelines and take figure 2 for reference. 1) input and output bypass ceramic capacitors are suggested to be put close to the in pin and out pin respectively. 2) ensure all feedback connections are short and direct. place the feedback resistors and compensation components as close to the chip as possible. 3) connect in, out and especially 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 gnd nc in out 6 7 8 1 2 3 4 5 c2 r1 r2 top layer bottom layer figure 2?pcb layout
MP2002 ? low input voltage, 500ma linear regulator MP2002 rev. 1.11 www.monolithicpower.com 10 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. typical application circuit MP2002 out fb gnd 8 5 3 1 4 6 in en pg 1.8v c3 1nf v in pg figure 3?typical application circuit with fix pinout
MP2002 ? low input voltage, 500ma linear regulator notice: the information in this document is subject to change wi thout notice. users should warra nt 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. MP2002 rev. 1.11 www.monolithicpower.com 11 10/10/2011 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2011 mps. all rights reserved. package information 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 marking 1.70 0.50 0.25 recommended land pattern 2.90 note: 1) all dimensions are in millimeters. 2) exposed paddle size does not include mold flash. 3) lead coplanarity shall be 0.10 millimeter max. 4) drawing conforms to jedec mo-229, variation 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 1.50 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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