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mp20041 dual, ultra low noise, high psrr 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 1 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description the mp20041 is a dual-channel, micropower, ultra low noise, low dropout and high psrr linear regulator. the output voltage of mp20041 ranges from 1.2v to 3.6v in 100mv increments and 1% accuracy by operating from a +2.5v to +6.0v input. the mp20041 can supply up to 300ma of load current at each channel. the mp20041 uses an internal pmos as the pass element, which consumes 114 a supply current (both ldos on) at no load condition. the en1 and en2 pins control each output respectively. when both channels shutdown simultaneously, the chip will be turned off and consume nearly zero operation current which is suitable for battery-power devices. the mp20041 features current limit and over temperature protection. it is available in a 2mm x 2mm tqfn8 package. features ? wide operating voltage ranges: 2.5v to 6v ? two ldos in a 2mmx2mm tqfn8 package ? up to 300ma output current (per channel) ? dual enable pins control each output ? 72db psrr at 10khz ? 11 v rms ultra low noise output with no noise bypass capacitor required ? 73mv dropout at 100ma load ? very fast line/load transient responses with small input/output capacitor ? current limit and thermal protection applications ? cellular phones ? battery-powered equipment ? laptop, notebook, and palmtop computers ? hand-held equipment ? wireless lan all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. typical application gnd in en2 en1 out2 c in c out1 c out2 mp20041 out1 en2 en1 in out2 out1
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 2 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information* part number v out1 v out2 package free air temperature (t a ) top marking mp20041dgt-gj-lf-z 1.8v 2.5v 5h mp20041dgt-mg-lf-z 2.8v 1.8v 7k mp20041dgt-ss-lf-z 3.3v 3.3v 9p mp20041dgt-sl-lf-z 3.3v 2.7v 8p mp20041dgt-ms-lf-z 2.8v 3.3v 7p mp20041dgt-pp-lf-z 3.0v 3.0v 6p mp20041dgt-js-lf-z 2.5v 3.3v 7s mp20041dgt-gs-lf-z 1.8v 3.3v 6s MP20041DGT-GB-LF-Z 1.8v 1.3v 8u mp20041dgt-gc-lf-z 1.8v 1.2v tqfn8 (2mmx2mm) -40c to +85c 8r * other output voltage versions between 1.2v and 3.3v are ava ilable in 100mv increments. contact factory for availability. ordering guide** 4 ** for rohs compliant packaging, add suffix - lf (e.g. mp20041dgt- -lf); for tape and reel, add suffix -z (e.g. mp20041dgt- - lf-z). output voltage selector guide*** code v out code v out c 1.2 t 2.65 b 1.3 l 2.7 f 1.5 m 2.8 w 1.6 n 2.85 g 1.8 v 2.9 d 1.85 p 3.0 y 1.9 q 3.1 h 2.0 x 3.15 e 2.1 r 3.2 j 2.5 s 3.3 k 2.6 z 5.0 *** code in bold are standard versions. for other output voltages between 1.2v and 5.0v contact factory for availability. minimum order quantity on non-standard versions is 25,000 units.
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 3 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package reference in en1 en2 nc out1 out2 nc gnd 8 7 6 5 1 2 3 4 top view absolute maxi mum ratings (1) supply input voltage ................................. 6.5v continuous power dissipation (t a = +25c) (2) ........................................................... 1.25w operation temperature range ... -40c to 85c storage temperature range ..... -65c to 150c lead temperature (soldering, 10sec) .....260c recommended operating conditions (3) supply input voltage.......................2.5v to 6.0v enable input voltage .........................0v to 6.0v operating junct. temp (t j )..... ?40 c to +125 c thermal resistance (4) ja jc 2mmx2mm tqfn8?????80??16. .. c/w notes: 1) exceeding these ratings may cause permanent damage to 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 t a . 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 its operating conditions. 4) measured on jesd51-7 4-layer board.
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 4 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics v in =3.5v, v out1 =1.8v, v out2 =2.5v, c in =c out1 =c out2 =1uf, en1=en2=v in , typical value at t a =25 c for each ldo unless otherwise noted. parameter symbol condition min typ max units input voltage v in v in =2.5v to 6.0v 2.5 6 v output voltage range v out 1.2 3.6 v load regulation (5) v out i load = 1ma to 300ma -35 -10 5 mv line regulation (6) ? v line v in =(v out +0.3v or 2.5v) to 6v, i out =1ma 0.05 %/v maximum output current i max continuous 300 ma current limit i lim short circuit current limit 525 ma quiescent current i g no load 114 ua v out1 =1.8v, i out1 = 100ma 75 mv v drop1 v out1 =1.8v, i out1 = 300ma 220 mv v out2 =2.5v, i out2 = 100ma 60 mv dropout voltage (7) v drop2 v out2 =2.5v, i out2 = 300ma 180 mv en input high threshold v ih v in = 2.5v to 6.0v 1.6 v en input low threshold v il v in = 2.5v to 6.0v 0.45 v en input bias current i sd en = gnd or v in 300 na shutdown supply current i gsd en1 = en2 = gnd 0.03 1 ua thermal shutdown temperature t sd 140 c thermal shutdown hysteresis t sd 10 c 100hz to 100khz, c out =1 f, i load =10ma 11 v rms output voltage noise 100hz to 100khz, c out =1 f, i load =100ma 11 v rms f=100hz 68 db f=1khz 66 db i load =10ma f=10khz 65 db f=100hz 69 db f=1khz 65 db output voltage ac psrr psrr i load =150ma f=10khz 72 db notes: 5) load regulation= () out(max ) out (min) outi outi out nom vv 100(%) v ?? ?? ?? ?? ? 6) line regulation= () in(max ) in(min) out v out v in(min) out(nom) in max vv 100(% / v) vv v ?? ?? ?? ?? ? ?? ? ?? 7) dropout voltage is defined as the input to output different ial when the output voltage drops 100mv below its nominal value.
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 5 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions pin # name description 1 in supply input pin. 2 en1 channel 1 enable (active high). do not float this pin. 3 en2 channel 2 enable (active high). do not float this pin. 4, 6 nc 5 gnd common ground. 7 out2 channel 2 output voltage. 8 out1 channel 1 output voltage.
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 6 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics v in =3.5v, v out1 =1.8v, v out2 =2.5v, i out1 =i out2 =0ma, c in =c out1 =c out2 =1uf, en1=en2=v in , typical value at t a = 25 c for both channel enabled. 0 10 20 30 40 50 60 70 80 10 10 2 10 3 10 4 10 5 10 6 10 2 10 3 10 4 10 5 10 6 0 20 40 60 80 100 120 psrr(db) frequency(hz) frequency(hz) 0 30 60 90 120 150 180 2.5 3 3.5 4 4.5 5 5.5 6 i load =50ma i load =100ma i load =10ma v en 2v/div v out 1v/div en start up waveform v in =3.5v, i out1 =i out2 =50ma 10us/div power supply rejection ratio vs. frequency channel-to-channel isolation vs. frequency quiescent current vs. supply voltage quiescent current (ua) channel isolation (db) vin(v) v out2 v out1 -0.25 -0.20 -0.15 -0.10 -0.05 0 0.05 0.10 0.15 0.20 0.25 -50 -30 -10 10 30 50 70 90 -0.25 -0.20 -0.15 -0.10 -0.05 0 0.05 0.10 0.15 0.20 0.25 -50 -30 -10 10 30 50 70 90 out1 voltage accuracy vs. temperature out2 voltage accuracy vs. temperature out voltage accuracy (%) i o =300ma i o =0ma i o =300ma i o =0ma out voltage accuracy (%) dropout voltage vs. temperature quiescent current vs. temperature quiescent current (ua) dropout voltage (mv) 0 20 40 60 80 100 120 140 160 180 200 -50 -30 -10 10 30 50 70 90 0 50 100 150 200 250 300 -50 -30 -10 10 30 50 70 90 v out2 dropout v out1 dropout out voltage accuracy vs. output current out voltage accuracy (%) output current(ma)
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 7 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics (continued) v in =3.5v, v out1 =1.8v, v out2 =2.5v, i out1 =i out2 =0ma, c in =c out1 =c out2 =1uf, en1=en2=v in , typical value at t a = 25 c for both channel enabled. 200us/div 200us/div load transient response i load =10 to 50ma, with resistor load load transient response i load =10 to 200ma, with resistor load load transient response i load =10 to 300ma, with resistor load load transient response i load =10 to 100ma, with resistor load 100us/div 200us/div 200us/div v out2 10mv/div v out1 10mv/div i load 20ma/div v out2 50mv/div v out1 50mv/div i load 100ma/div v out2 50mv/div v out1 50mv/div i load 200ma/div v out2 20mv/div v out1 20mv/div i load 50ma/div v out1 10mv/div v out2 10mv/div v in 1v/div v out1 10mv/div v out2 10mv/div v in 1v/div v out1 10mv/div v out2 10mv/div v in 1v/div v out1 10mv/div v out2 10mv/div v in 1v/div line transient response v in =3v to 4v, i load =1ma line transient response v in =3v to 4v, i load =100ma line transient response v in =3v to 4v, i load =10ma line transient response v in =3v to 4v, i load =50ma 100us/div 100us/div 100us/div v en 2v/div v out 1v/div 40us/div en shut down waveform v in =3.5v, i out1 =i out2 =50ma v out2 v out1
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 8 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. block diagram figure1?function block diagram operation the mp20041 integrates two low noise, low dropout, low quiescent current and high psrr linear regulators. it is intended for use in devices that require very low voltage, low quiescent current power such as wireless lan, battery- powered equipment and hand-held equipment. the mp20041 uses internal pmoss as the pass elements and features internal thermal shutdown and internal current limit circuits. dropout voltage dropout voltage is the minimum input to output differential voltage required for the regulator to maintain an output voltage within 100mv of its nominal value. because the pmos pass element behaves as a low-value resistor, the dropout voltage of mp20041 is very low. shutdown the mp20041 can be switched on or off by a logic input at the en pin. a high voltage at this pin will turn the device on. when the en pin is low, the regulator output is off. the en pin should be tied to vin to keep the regulator output always on if the application does not require the shutdown feature. do not float the en pin. current limit the mp20041 includes two independent current limit structures which monitor and control each pmos?s gate voltage limiting the guaranteed maximum output current to 300ma. thermal protection thermal protection turns off the pmos when the junction temperature exceeds +140oc, allowing the ic to cool. when the ic?s junction temperature drops by 10oc, the pmos will be turned on again. thermal protection limits total power dissipation in the mp20041. for reliable operation, junction temperature should be limited to 125 oc maximum. load-transient considerations the output response of load-transient consists of a dc shift and transient response. because of the excellent load regulation of mp20041, the dc shift is very small. the output voltage transient depends on the output capacitor?s value and the esr. increasing the capacitance and decreasing the esr will improve the transient response. typical output voltage transient spike of mp20041 for a step change in the load current from 10ma to 100ma is tens mv.
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 9 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application information power dissipation the power dissipation for any package depends on the thermal resistance of the case and circuit board, the temperature difference between the junction and ambient air, and the rate of airflow. the power dissipation across the device can be represented by the equation: p = (v in - v out ) i out the allowable power dissipation can be calculated using the following equation: p (max) = (t junction - t ambient ) / ja where (t junction - t ambient ) is the temperature difference between the junction and the surrounding environment, ja is the thermal resistance from the junction to the ambient environment. connect the gnd pin of mp20041 to ground using a large pad or ground plane helps to channel heat away. input capacitor selection using a capacitor whose value is >0.47f on the mp20041 input and the amount of capacitance can be increased without limit. larger values will help improve line transient response with the drawback of increased size . ceramic capacitors are preferred, but tantalum capacitors may also suffice. output capacitor selection the mp20041 is designed specifically to work with very low esr ceramic output capacitor in space-saving and performance consideration. a ceramic capacitor in the range of 0.47f and 10f, and with esr lower than 1.2 ? is suitable for the mp20041 application circuit. output capacitor of larger values will help to improve load transient response and reduce noise with the drawback of increased size. 0.1 1 10 100 0 50 100 150 200 250 300 output current(ma) figure 2?relationship between esr and ldo stability reverse current path the pmos used in the mp20041 has an inherent diode connected between input and output (see figure3). if v out - v in is more than a diode-drop, this diode gets forward biased and starts to conduct. to avoid misoperation, an external schottky connected in parallel with the internal parasitic diode prevents it from being turned on by limiting the voltage drop across it to about 0.3v (see figure 4). vin vout figure 3?inherent diode connected between each regulator input and output figure 4?external schottky diode connected in parallel with the internal parasitic diode
mp20041-dual, ultra low noise, high psrr, 300ma linear regulator mp20041 rev. 1.0 www.monolithicpower.com 10 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 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 5 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. gnd in r1 r2 en2 en1 out2 c in c out1 c out2 mp20041 out1 en2 en1 in out2 out1 top layer figure 5?pcb layout
mp20041-dual, ultra low noise, high psrr, 300ma 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. mp20041 rev. 1.0 www.monolithicpower.com 11 1/17/2013 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information 2mm x 2mm tqfn8

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