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mp20249 dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 1 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. the future of analog ic technology description the mp20249 is a dual-channel, ultra-low noise, low dropout and high psrr linear regulator. fixed output voltage options are available between 1.2v to 3.3v with 1% accuracy by operating from a +2.3v to +6.0v input. it is designed to deliver up to 200ma of load current at each channel. dropout voltage is only 75mv at full load. the mp20249 uses internal pmosfets as pass elements, which consume 125a supply current (both ldos on) at no load condition. with new innovative design techniques, the mp20249 can achieve an output voltage noise as low as 16 vrms without using a bypass capacitor at each channel. the mp20249 is designed and optimized to work with small- value, low-cost ceramic capacitors, making it ideal for applications with space-constraints. it typically requires only 1 f of output capacitance for stability with any load at each channel. the en1 and en2 pins control each output respectively. when both channels shutdown simultaneously, the chip is turned off and consumes nearly zero operation current, which is suitable for battery-power devices. the mp20249 features current limit and over-temperature protection. the mp20249 also has an output discharge function that controls the quick discharging of the output capacitor. it is available in a miniature 6-ball wlcsp package. features ? input voltage range: 2.3v to 6.0v ? two ldos in a 1.0x1.5mm wlcsp package ? up to 200ma output current (per channel) ? dual enable pins control each output ? 16 vrms output noise (100hz-1khz) bandwidth with no bypass capacitor required ? high psrr: 65db @ 1khz ? low dropout: 60mv @ 150ma load ? stable with 1 f ceramic capacitor for any load (per channel) ? very fast line and load transient response ? output discharge function ? current limit and thermal protection applications ? cellular mobile phones ? digital cameras ? handheld and battery-powered equipment ? wireless lan ? post dc-to-dc regulation ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. a dam (analog digital adaptive modulation), aam (?.) aretrademarks of monolithic power systems, inc. typical application mp20249 en1 en2 gnd vin vout1 vout2 1uf 1uf 1uf a1 a2 b1 b2 c1 c2 vin=2.3v to 6v vout1=1.2v to 3.3v vout2=1.2v to 3.3v
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 2 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. ordering information* part number* v out1 v out2 package top marking free air temperature range (t a ) MP20249DC-MC-LF-Z 2.8v 1.2v wlcsp (1.0x1.5mm) 9wy -40c to +85c * contact factory for other fixed output options ordering guide** ** for rohs compliant packaging, add suffix - lf (e.g. mp20249dc- -lf); for tape and reel, add suffix -z (e.g. mp20249dc- -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 *** code in bold are standard versions. for other output voltages between 1.2v and 3.3v contact factory for availability. minimum order quantity on non-standard versions is 25,000 units. package reference
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 3 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. absolute maxi mum ratings (1) supply input voltage ................................ 6.5v continuous power dissipation (t a = +25c) (2) wlcsp????????????..??.0.5w storage temperature range .... -65c to 150c lead temperature (soldering, 10sec) ....300c esd susceptibility (3) hbm (human body mode) ..........................2kv mm (machine mode) ................................ 200v recommended operating conditions (4) supply input voltage ...................... 2.3v to 6.0v enable input voltage ........................ 0v to 5.5v operating junct. temp (t j ) ...... -40 c to +125 c thermal resistance (5) ja jc wlcsp .................................. 250 ..... n/a .. 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 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 powe r 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) devices are esd sensitive. handling precaution recommended. 4) the device is not guaranteed to function outside of its operating conditions. 5) measured on jesd51-7, 4-layer pcb.
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 4 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. electrical characteristics v in = (v out + 0.5 v) or 2.3v (whichever is greater), en = v in , i out = 10ma, c in = c out1,2 = 1f, t a = 25c, unless otherwise noted. notes: 6) load regulation= () out(max ) out(min) out i out i out nom vv (%) v ?? ?? ?? ?? ? 7) dropout voltage is defined as the input to output different ial when the output voltage drops 100mv below its nominal value. 8) line regulation= () in(max ) in(min) out v out v in(min) out(nom) in max vv (% / v) vv v ?? ?? ?? ?? ? ?? ? ?? parameter symbol condition min typ max units input voltage range v in 2.3 6.0 v maximum output current i max continuous 200 ma output voltage accuracy ? v out i load = 10ma -1 +1 % current limit i lim r load =1 ? 220 270 440 ma ground current i q no load 125 a dropout voltage (6) v drop v out =1.8v, i out = 150ma, t j =-40 c to +125 c 60 mv v out =1.8v, i out = 200ma t j =-40 c to +125 c 75 mv line regulation (7) v lnr v in =2.3v to 6v i out =0.1ma -0.03 0.03 %/v load regulation (8) v ldr i out =1ma to 200ma 0.001 %/ma en input high threshold v ih v in = 2.3v to 5.5v 1.2 v en input low threshold v il v in = 2.3v to 5.5v 0.4 v en input bias current i sd en = v in =5.5v 100 300 na shutdown supply current i gsd en1 = en2 = gnd 0.12 1 a under-voltage lockout uvlo rise 2.25 v under-voltage lockout hysteresis uvlo hys 160 mv thermal shutdown temperature t sd 150 c thermal shutdown hysteresis ? t sd 15 c output voltage noise 100hz to 1khz, c out1,2 =4.7f, v out =1.2v i load =10ma 16 v rms output voltage ac psrr 1khz, c out1,2 = 2.2f, i load = 10ma 65 db 10khz, c out1,2 = 2.2f, i load = 10ma 65 db 100khz , c out1,2 = 2.2f, i load = 10ma 55 db active pull-down resistance r shutdown no load, c out1,2 =1f 80 ?
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 5 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. pin functions package pin # name description a1 en1 enable input for regulator 1. drive en1 high to turn on regulator 1; drive it low to turn off regulator 1. for automatic startup, connect en1 to vin. b1 gnd ground pin. c1 en2 enable input for regulator 2. drive en2 high to turn on regulator 2; drive it low to turn off regulator 2. for automatic startup, connect en2 to vin. a2 vout1 regulated output voltage 1. connect a 1 f or greater output capacitor between vout1 and gnd. b2 vin regulator input supply. bypass vin to gnd with a 1f or greater capacitor. c2 vout2 regulated output voltage 2. connect a 1 f or greater output capacitor between vout2 and gnd.
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 6 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics v in = (v out + 0.5 v) or 2.3v (whichever is greater), en = v in , i out = 10ma, v out1 =2.8v, v out2 =1.2v, c in = c out1,2 = 1f, t a = 25c, unless otherwise noted. v en (v) v en (v) quiescent current vs. input voltage only one channel is enabled dropout voltage vs. temperature v out =2.8v, i out =200ma dropout voltage vs. output current v out =2.8v quiescent current vs. temperature only one channel is enabled 0 20 40 60 80 100 120 140 160 -40 -20 0 20 40 60 80 100 0 20 40 60 80 100 120 140 160 3 3.5 4 4.5 5 5.5 6 input voltage(v) 0 10 20 30 40 50 60 70 -40 -20 0 20 40 60 80 100 dropout voltage (mv) 0 10 20 30 40 50 60 70 output current(ma) dropout voltage (mv) 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 3 3.5 4 4.5 5 5.5 6 input voltage(v) en threshold vs. input voltage 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 -40 -20 0 20 40 60 80 100 en threshold vs. temperature en high threshold en low threshold en high threshold en low threshold 0 100 200 300 400 500 -40 -20 0 20 40 60 80 100 current limit(ma) current limit vs. temperature 0 100 200 300 400 500 3 3.5 4 4.5 5 5.5 6 input voltage(v) current limit(ma) current limit vs. input voltage -0. 8 -0. 6 -0. 4 -0. 2 0 0.2 0.4 0.6 0.8 -40 -20 0 20 40 60 80 100 output voltage accuracy(%) output voltage accuracy vs. temperature i out =200ma 0 25 50 75 100 125 150 175 200
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 7 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics (continued) v in = (v out + 0.5 v) or 2.3v (whichever is greater), en = v in , i out = 10ma, v out1 =2.8v, v out2 =1.2v, c in = c out1,2 = 1f, t a = 25c, unless otherwise noted. output current (ma) psrr vs. frenquency -20 -10 0 10 20 30 40 50 60 70 80 90 100 10 10 2 10 3 10 4 10 5 10 6 10 7 frequency (hz) psrr (db) i out =50ma i out =10ma i out =150ma i out =100ma v out =2.8v psrr vs. frenquency v out =1.2v -20 -10 0 10 20 30 40 50 60 70 80 90 100 10 10 2 10 3 10 4 10 5 10 6 10 7 frequency (hz) frequency (hz) psrr (db) psrr (db) i out =150ma i out =10ma i out =50ma i out =100ma channel to channel isolation vs. frenquency -20 -10 0 10 20 30 40 50 10 10 2 10 3 10 4 10 5 10 6 0.1 1 10 100 0 25 50 75 100 125 150 175 200 region of stable c out esr vs. output current unstable range stable range
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 8 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics (continued) v in = (v out + 0.5 v) or 2.3v (whichever is greater), en = v in , i out = 10ma, v out1 =2.8v, v out2 =1.2v, c in = c out1,2 = 1f, t a = 25c, unless otherwise noted. v out1 2v/div v out2 1v/div v in 2v/div i in 200ma/div v out1 2v/div v out2 2v/div v in 2v/div i in 200ma/div v out1 2v/div v out2 2v/div en 5v/div i in 200ma/div v out1 10mv/div v in 10m/div v out2 2v/div 2ms/div 2v/div 1s/div i out 20ma/div v out1 20mv/div i out 20ma/div v out2 50mv/div input power start up input power shut down en start up v out1 2v/div v out2 2v/div en 5v/div i in 200ma/div en shut down i out1 =i out2 =200ma i out1 =i out2 =200ma i out1 =i out2 =200ma i out1 =i out2 =200ma line transient v in =3v to 6v, v out1 =2.8v v out2 =1.2v, i out1 =i out2 =200ma load transient v in =3.3v, v out1 =2.8v i out =1ma to 60ma, with resistor load load transient v in =3.3v, v out2 =1.2v i out =1ma to 60ma, with resistor load
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 9 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. block diagram v ref current limit current limit thremal protection and control vin vout1 vout2 en1 en2 gnd 80 80 error amp vref1 filter error amp vref2 filter enable control figure 1?function block diagram
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev1.0 www.monolithicpower.com 10 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. operation the mp20249 integrates two ultra low noise, low dropout, low quiescent current and high psrr linear regulators for space-restricted applications. it is intended for use in devices that require very low voltage, and ultra-small footprint, such as mobile phones and mp3 players. the mp20249 uses internal p-channel mosfets 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. it determines the available end- of-life battery voltage in battery-powered systems. for the p-channel mosfet pass element, the dropout voltage is a function of drain to source on resistance. because the p- channel mosfet pass element behaves as a low-value resistor, the dropout voltage of mp20249 is very low. under voltage lockout the mp20249 has an internal under-voltage lockout circuit that disables the device when the input voltage is less than approximately 2.1v. this ensures that the input and the output of the mp20249 behave in a predictable manner during input power-up. en on / off the mp20249 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. output discharge function when either channel is disabled, it goes into output discharge mode automatically and its internal discharge mosfet provides a resistive discharge path for the output capacitor. this function is only suitable for discharge output capacitor in the limited time. current limit and thermal protection the mp20249 includes two independent current limit structures which monitor and control each p-channel mosfet?s gate voltage to limit the guaranteed maximum output current to 200ma. thermal protection turns off the p-channel mosfets when the junction temperature exceeds +150oc, allowing the ic to cool. when the ic?s junction temperature drops by 15oc, the p-channel mos will be turned on again. thermal protection limits total power dissipation in the mp20249. for reliable operation, junction temperature should be limited to 125oc maximum.
mp20249 ? dual, ultra-low noise, high psrr 200ma linear regulator mp20249 rev. 1.0 www.monolithicpower.com 11 12/15/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 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. connecting the gnd pin of mp20249 to ground with a large ground plane will help the channel heat away. input capacitor selection using a capacitor whose value is >1 f on the mp20249 input and the amount of capacitance can be increased without limit. larger values will help to improve line transient response with the drawback of increased size. ceramic capacitors are preferred, but tantalum capacitors may also suffice. output capacitor selection the mp20249 is designed specifically to work with very low esr ceramic output capacitor and benefit applications with space limitation. output capacitor of larger values will help to improve load transient response and reduce noise with the drawback of increased size. for the application circuit, the mp20249 requires a minimum capacitance of 0.7uf with an esr of 1 ? or less. output noise and psrr in the mp20249 device, each channel has an internal 50pf bypass capacitor with new innovative structure that reduces output noises greatly. therefore, space-limited applications do not need to use external bypass capacitors. the power supply rejection is 65db at 10khz and 55db at 100khz.
mp20249 ? dual, ultra-low noise, high psrr 200ma 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. mp20249 rev. 1.0 www.monolithicpower.com 12 12/15/2010 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. package information

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