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mic5310 dual 150ma cap ldo in 2mm x 2mm mlf ? uldo is a trademark of micrel, inc. mlf and micro leadframe are registered trademarks of amkor technology, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com general description the mic5310 is a tiny dual ultra low dropout (uldo?) linear regulator ideally suited for portable electronics due to its high power supply ripple rejection (psrr) and ultra low output noise. the mic5310 integrates two high-performance 150ma uldos into a tiny 2mm x 2mm leadless mlf ? package, which provides exceptional thermal package characteristics. the mic5310 is a cap design which enables operation with very small ceramic output capacitors for stability, thereby reduc ing required board space and component cost. the combination of extremely low-drop-out voltage, high power supply rejection and exceptional thermal package characteristics makes it ideal for powering rf/noise sensitive circuitry, cellular phone camera modules, imaging sensors for digital still cameras, pdas, mp3 players and webcam applications the mic5310 uldo? is available in fixed-output voltages in the tiny 8-pin 2mm x 2mm leadless mlf ? package which occupies less than half the board area of a single sot-6 package. additional voltage options are available. for more information, contact micrel marketing department. data sheets and support documentation are found on the micrel web site www.micrel.com . features ? 2.3v to 5.5v input voltage range ? ultra-low dropout voltage uldo? 35mv @ 150ma ? high psrr - >70db @ 1khz ? ultra-low output noise: 30v rms ? 2% initial output accuracy ? tiny 8-pin 2mm x 2mm mlf ? leadless package ? excellent load/line transient response ? fast start up time: 30s ? cap stable with 1f ceramic capacitor ? thermal shutdown protection ? low quiescent current: 75a per output ? current limit protection applications ? mobile phones ? pdas ? gps receivers ? portable electronics ? portable media players ? digital still and video cameras typical application march 2011 m9999-032411- c
micrel, inc. mic5310 march 2011 2 m9999-032411- rf power supply circuit block diagram mic5310 fixed block diagram c
micrel, inc. mic5310 march 2011 3 m9999-032411- ordering information functional part number ordering part number marking 1 v out1 /v out2 2 junction temperature range package 3 mic5310-1.8/1.5yml mic5310-gfyml gfz 1.8v/1.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-1.8/1.8yml mic5310-ggyml ggz 1.8v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-1.8/1.6yml mic5310-gwyml gwz 1.8v/1.6v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.5/1.8yml mic531 0-jgyml jgz 2.5v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.5/2.5yml mic5310-jjyml jjz 2.5v/2.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.6/1.85yml mic5310-kdyml kdz 2.6v/1.85 ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.6/1.8yml mic531 0-kgyml kgz 2.6v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.7/2.7yml mic5310-llyml llz 2.7v/2.7v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.8/1.5yml mic5310-mfyml mfz 2.8v/1.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.8/1.8yml mic531 0-mgyml mgz 2.8v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.8/2.6yml mic5310-mkyml mkz 2.8v/2.6v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.8/2.8yml mic5310-mmyml mmz 2.8v/2.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.85/1.85yml mic531 0-ndyml ndz 2.85v/1.85v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.85/2.6yml mic531 0-nkyml nkz 2.85v/2.6v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.85/2.85yml mic531 0-nnyml nnz 2.85v/2.85v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.9/1.5yml mic5310-ofyml ofz 2.9v/1.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.9/1.8yml mic5310-ogyml ogz 2.9v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-2.9/2.9yml mic5310-ooyml ooz 2.9v/2.9v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/1.8yml mic531 0-pgyml pgz 3.0v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/2.5yml mic5310-pjyml pjz 3.0v/2.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/2.6yml mic5310-pkyml pkz 3.0v/2.6v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/2.8yml mic531 0-pmyml pmz 3.0v/2.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/2.85yml mic5310-pnyml pnz 3. 0v/2.85v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.0/3.0yml mic5310-ppyml ppz 3.0v/3.0v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/1.5yml mic5310-sfyml sfz 3.3v/1.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/1.8yml mic531 0-sgyml sgz 3.3v/1.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/2.5yml mic5310-sjyml sjz 3.3v/2.5v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/2.6yml MIC5310-SKYML skz 3.3v/2.6v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/2.8yml mic531 0-smyml smz 3.3v/2.8v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/2.85yml mic5310-snyml snz 3. 3v/2.85v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/2.9yml mic531 0-soyml soz 3.3v/2.9v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/3.0yml mic5310-spyml spz 3.3v/3.0v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/3.2yml mic5310-sryml srz 3.3v/3.2v ?40c to +125c 8-pin 2x2 mlf ? mic5310-3.3/3.3yml mic5310-ssyml ssz 3.3v/3.3v ?40c to +125c 8-pin 2x2 mlf ? notes: 1. over bar symbol ( ) may not be to scale. over bar at pin 1. 2. other voltage options available. contact micrel for more details. 3. mlf? is a green rohs compliant package. lead finish is nipdau. mold compound is halogen free. c
micrel, inc. mic5310 march 2011 4 m9999-032411- pin configuration 8-pin 2mm x 2mm mlf (ml) top view pin description pin number pin name pin function 1 vin supply input. 2 gnd ground 3 byp reference bypass: connect external 0. 1f to gnd to reduce output noise. may be left open when bypass capacitor is not required. 4 en2 enable input (regulator 2). active hi gh input. logic high = on; logic low = off; do not leave floating. 5 en1 enable input (regulator 1). active hi gh input. logic high = on; logic low = off; do not leave floating. 6 nc not internally connected 7 vout2 regulator output ? ldo2 8 vout1 regulator output ? ldo1 ? ep exposed pad. connect ep to gnd. c
micrel, inc. mic5310 march 2011 5 m9999-032411- c absolute maximum ratings (1) supply voltage (v in ) .....................................0v to +6v enable input voltage (v en )...........................0v to +6v power dissipation...........................in ternally limited (3) lead temperature (sol dering, 3sec ...................260c storage temperature (t s ) ................. -65c to +150c esd rating (4) .........................................................2kv operating ratings (2) supply voltage (v in )............................... +2.3v to +5.5v enable input voltage (v en ).............................. 0v to v in junction temperature ......................... -40c to +125c junction thermal resistance mlf-8 ( ja ) ............................................... 90 c/w electrical characteristics (5) v in = en1 = en2 = v out + 1.0v; higher of the two regulator outputs, i outldo1 = i outldo2 = 100a; c out1 = c out2 = 1f; c byp = 0.1f; t j = 25c, bold values indicate ?40c t j +125c, unless noted. parameter conditions min typ max units variation from nominal v out -2.0 +2.0 % output voltage accuracy variation from nominal v out ; ?40c to +125c -3.0 +3.0 % line regulation v in = v out + 1v to 5.5v; i out = 100a 0.02 0.3 0.6 %/v %/v load regulation i out = 100a to 150ma 0.5 2.0 % dropout voltage ( note 6 ) i out = 100a i out = 50ma i out = 100ma i out = 150ma 0.1 12 25 35 50 75 100 mv mv mv mv ground current en1 = high; en2 = low; i out = 100a to 150ma en1 = low; en2 = high; i out = 100a to 150ma en1 = en2 = high; i out1 = 150ma, i out2 = 150ma 85 85 150 120 120 190 a a a ground current in shutdown en1 = en2 = 0v 0.01 2 a ripple rejection f = 1khz; c out = 1.0f; c byp = 0.1f f = 20khz; c out = 1.0f; c byp = 0.1f 70 65 db db current limit v out = 0v 300 550 950 ma output voltage noise c out = 1.0 f; c byp = 0.1f; 10hz to 100khz 30 v rms enable inputs (en1 / en2) logic low 0.2 v enable input voltage logic high 1.1 v v il 0.2v 0.01 a enable input current v ih 1.0v 0.01 a turn-on time (see timing diagram) turn-on time (ldo1 and 2) c out = 1.0f; c byp = 0.01f 30 100 s notes : 1. exceeding the absolute maximum rating may damage the device. 2. the device is not guaranteed to function outside its operating rating. 3. the maximum allowable power dissipation of any t a (ambient temperature) is p d(max) = (t j(max) ? t a ) / ja . exceeding the maximum allowable power dissipation will result in excessive die te mperature, and the regulator will go into thermal shutdown. 4. devices are esd sensitive. hand ling precautions recommended. human body model, 1.5k in series with 100pf. 5. specification for packaged product only. 6. dropout voltage is defined as the input-to-output different ial at which the output voltage drops 2% below its nominal v out . for outputs below 2.3v, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3v.
micrel, inc. mic5310 march 2011 6 m9999-032411- typical characteristics mic5310 - output noise spectral density 0.001 0.01 0.1 1 10 10 100 1,000 10,000 100,00 0 1,000,0 00 10,000, 000 frequency (hz) noise uv/ hz v in =v out +1 c out =1uf c by p =0.01u f v t =3 v dropout voltage 0 5 10 15 20 25 30 35 40 0 20 40 60 80 100 120 140 iout (ma) dropout (mv) v in =v out +1 v out =3v c out =1uf ground current vs. temperature 70 72 74 76 78 80 82 84 86 88 90 -40 -20 0 20 40 60 80 100 120 temperature (c) ground current (ua) v in = v out + 1v en1 = v in , en2 = gnd v out = 3v c out = 1 uf 100 ua 50 ma 100 ma 150 ma output voltage 2.7 2.75 2.8 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 -40 -20 0 20 40 60 80 100 120 temperature (c) output voltage (v) v in = v out + 1v v in = en1 = en2 v out = 3v i out = 100 ua c out = 1 uf output voltage vs output current 2.7 2.8 2.9 3 3.1 3.2 3.3 0 25 50 75 100 125 150 output current (ma) output voltage (v) v in =v out +1 v out =3v c out =1uf ? dropout characteristics 0 0.5 1 1.5 2 2.5 3 3.5 012345 input voltage (v) output voltage (v) 6 c out =1uf 100ua 150ma dropout voltage 0 10 20 30 40 50 -60 -40 -20 0 20 40 60 80 100 120 140 temperature (c) dropout voltage (mv) v out = 3 v v in = v out + 1 v v in = en1 = en2 c out = 1 uf 100 ma 50 ma 10ma 100u a 1 50 ma ground current vs output current 70 72 74 76 78 80 82 84 86 88 90 0 25 50 75 100 125 150 output current (ma) ground current (ua) v out =3v v in =v out +1v ve n1 =v en2 =v in c out1 =c out2 =1uf current limit vs. input voltage 400 420 440 460 480 500 520 540 560 580 600 2345 input voltage (v) current limit (ma) c out =1uf v en =v in c
micrel, inc. mic5310 march 2011 7 m9999-032411- typical characteristics (continued) power supply rejection ratio -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1,000 10,000 100,000 1,000,000 frequency (hz) db v in = 3.4v v out =3v c out =1uf i out =50ma c byp =0.1uf power supply rejection ratio -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1,000 10,000 100,000 1,000,000 frequency (hz) db v in = 3.6v v out =3v c out =1uf i out =150ma c by p =0.1uf c
micrel, inc. mic5310 march 2011 8 m9999-032411- functional characteristics c
micrel, inc. mic5310 march 2011 9 m9999-032411- applications information enable/shutdown the mic5310 comes with dual active-high enable pins that allow each regulator to be enabled independently. forcing the enable pin low disables the regulator and sends it into a ?zero? off mode current state. in this state, current consumed by the regulator goes nearly to zero. forcing the enable pin high enables the output voltage. the active high enable pin uses cmos technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. input capacitor the mic5310 is a high-performance, high bandwidth device. therefore, it requires a well bypassed input supply for optimal performance. a 1f capacitor is required from the input to ground to provide stability. low esr ceramic capacitors provide optimal performance at a minimum of space. additional high frequency capacitors, such as small valued npo dielectric type capacitors, help filter out high frequency noise and are good practice in any rf based circuit. output capacitor the mic5310 requires an out put capacitor of 1f or greater to maintain stability. the design is optimized for use with low esr ceramic chip capacitors. high esr capacitors may cause high frequency oscillation. the output capacitor can be increased, but performance has been optimized for a 1f ceramic output capacitor and does not improve significantly with larger capacitance. x7r/x5r dielectric type ceramic capacitors are recommended because of their temperature performance. x7r type capacitors change capacitance by 15% over t heir operating temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. to use a ceramic chip capacitor with y5v dielectric, the value must be much higher than an x7r ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. bypass capacitor a capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. the capacitor bypasses the inte rnal reference. a 0.1f capacitor is recommended for applications that require low-noise outputs. the bypass capacitor can be increased, further reducing noise and improving psrr. turn on time increases slightly with respect to bypass capacitance. a unique, quick start circuit allows the mic5310 to drive a large capacitor on the bypass pin without significantly slowing turn on time. no-load stability unlike many other voltage regulators, the mic5310 will remain stable and in regulation with no load. this is especially important in cmos ram keep alive applications. thermal considerations the mic5310 is designed to provide 150ma of continuous current for both outputs in a very small package. maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. given that the input voltage is 3.3v, the output voltage is 2.8v for v out1 , 1.5v for v out2 and the output current = 150ma. the actual power dissipation of the regulator circuit can be determined using the equation: p d = (v in ? v out1 ) i out1 + (v in ? v out2 ) i out2 + v in i gnd because this device is cmos and the ground current is typically <100a over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. p d = (3.3v ? 2.8v) 150ma + (3.3v -1.5) 150ma p d = 0.345w to determine the maximum ambient operating temperature of the package, use the junction-to- ambient thermal resistance of the device and the following basic equation: p d(max) = t j(max) - t a ja ? ? t j(max) = 125c, the maximum junction temperature of the die ja thermal resistance = 90c/w. the table below shows junction-to-ambient thermal resistance for the mic5310 in different packages. c
micrel, inc. mic5310 march 2011 10 m9999-032411- c package ja recommended minimum footprint 8-pin 2x2 mlf ? 90c/w thermal resistance substituting p d for p d(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. the junction-to-ambient thermal resistance for the minimum footprint is 90c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the mic5310-mfyml at an input voltage of 3.3v and 150ma loads at each output with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: 0.345w = (125c ? t a )/(90c/w) t a = 93.95c therefore, a 2.8v/1.5v application with 150ma at each output current can accept an ambient operating temperature of 93.95c in a 2mm x 2mm mlf ? package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ?regulator thermals? section of micrel?s designing with low-dropout voltage regulators handbook. this information can be found on micrel's website at: http://www.micrel.com/_pdf/other/ldobk_ds.pdf
micrel, inc. mic5310 march 2011 11 m9999-032411- package information 8-pin 2mm x 2mm mlf (ml) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical impla into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. can nt ? 2006 micrel, incorporated. c

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