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mic5512/14 single 300ma ldo in 1.6mm 1.6mm thin dfn package micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com april 8, 2013 revision 1.1 general description the mic5512/14 is an advanced general - purpose ldo ideal for powering general - purpose portable devices. the mic5512/14 family of products provides a high - performance 300ma ldo in an ultra - small 1 .6 mm x 1 .6 mm thin dfn package. the mic5 512 and mic5514 ldos include an a uto - discharge feature on the output that is activated when the enable pin is low. the mic5514 have an internal pull down resistor on the e nable pin that will disable the output when the enable pin is left floating, this is ideal for applications where the control signal is floating during processor boot up. ideal for battery - powered applications, the mic5512/14 o ffers a typical 1 % initial ac curacy, low dropout voltage ( 160mv at 30 0ma), and low ground current (typically 38a). the mic5512/14 can also be put into a zero - off - mode current state, drawing virtually no current when disabled. the mic5512/14 has an operating junction temperature rang e of ? 40 c to 125 c . datasheets and support documentation are available on micrel?s web site at : www.micrel.com . features ? input voltage range: 2.5v to 5.5v ? fixed output voltage range: 1.0v to 3.3v ? 300ma guaranteed output current ? 1% i nitial output accuracy ? stable with 1 f ceramic output capacitors ? low dropout voltage: 160mv @ 300ma ? output discharge circuit ? internal e nable pull down resistor ( mic 5514) ? available in ultra - small 6 - pin 1.6mm 1.6mm t hin dfn package app lications ? smart phones ? dscs, gps, pmps, and pdas ? medical devices ? portable electronics ? 5v systems typical application
micrel, inc. mic5512/14 april 8, 2013 2 revision 1.1 ordering information part number marking code output voltage ( 1 ) auto - discharge en pull - down temperature range package ( 2 , 3 ) mic5 512 - 1.2ymt 7e 1.2v yes no ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5512 - 1.8 ymt 7d 1.8v yes no ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5512 - 2.8 ymt 7c 2.8v yes no ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5512 - 3.3 ymt 7a 3.3v yes no ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5 514 - 1.2 ymt b8 1.2v yes yes ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5514 - 1.8 ymt b7 1.8v yes yes ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5514 - 2.8 ymt a9 2.8v yes yes ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5514 - 3.0 ymt a8 3.0v yes yes ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn mic5514 - 3.3 ymt a7 3.3v yes yes ? 40c to +125c 6 - pin 1.6 mm x 1.6 mm thin dfn note s : 1. other voltages are available. contact micrel for detail s. 2. thin dfn = pin 1 identifier. 3. thin dfn is a green rohs - compliant package. lead finish is nipdau. mold compound is halogen free. pin configuration 6 - pin 1.6mm 1.6mm thin dfn (mt) (top view) pin description pin number pin name pin function 1 en enable input: active high. high = on; low = off. mic5512 do not leave floating. mic5514 has an internal 4m? pull down resistor and will disable vout when en is floating. 2 , 5 nc not connected. 3 vin input supply. 4 vout output voltage. when disabled the mic55 12/ 14 switches in an internal 25? load to discharge the external capacitors. 6 gnd ground. ep epad exposed heatsink pad. connect to gnd for best performance.
micrel, inc. mic5512/14 april 8, 2013 3 revision 1.1 absolute maximum ratings ( 1 ) supply voltage (v in ) .......................................... ? 0 .3 v to 6 v enable voltage (v en ). ........................................ ? 0.3v to v in power dissipation (p d ) ........................... internally limited (3) lead temperature (soldering, 10 s ) ............................ 260c junction temperature (t j ) ........................ ? 40c to +150 c storage temperature (t s ) ......................... ? 65c to +150c esd rating ( 4) .................................................................. 3 kv operating ratings ( 2 ) supply voltage (v in ) ......................................... 2.5 v to 5.5 v enable voltage (v en ) .............................................. 0 v to v i n junction temperature (t j ) ........................ ? 40c to +125c junction thermal resistance 1.6mm 1.6mm thin dfn - 6 ( ja ) .................. 92.4 c/w electrical characteristics ( 5 ) v in = v en = v out + 1v; c in = c out = 1 f; i out = 100 a ; t j = 25c, bold values indicate ? 40c to +125c, unless noted. parameter condition min . typ . max . units output voltage accuracy variation from nominal v out ? 2.0 1 +2.0 % variation from nominal v out ; ? 40c to +125c ? 3 .0 +3 .0 line regulatio n v in = v out +1v to 5.5v ; i out = 100a 0.02 0.3 %/v load regulation ( 6 ) i out = 100 a to 300ma 8 40 mv dropout voltage ( 7 ) i out = 150ma i out = 300ma 80 160 190 380 mv ground pin current ( 8 ) i out = 0ma i out = 300ma 38 42 55 65 a ground pin current in shutdown v en = 0v 0.05 1 a ripple rejection f = 1khz; c out = 1 f 65 db current limit v out = 0v 400 630 900 ma output voltage noise c out = 1 f, 10hz to 100khz 175 v rms auto - discharge nfet resistance v en = 0v; v in = 3.6v; i out = ? 3ma 25 ? enable input enable pull - down resistor mic5514 o nly 4 0? enable input voltage logic low 0.2 v logic high 1.2 enable input current mic5512 v en = 0v 0.01 1 a v en = 5.5 v 0 .01 1 enable input current mic5514 v en = 0v 0.01 1 a v en = 5.5 v 1.4 2 turn -o n time c out = 1 f; i out = 1 5 0 ma 50 125 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 d ie temperature, and the regulator will go into thermal shutdown. 4. devices are esd sensitive. handling precautions are recommended. human body model, 1.5k in series with 100pf. 5. specification for packaged product only. 6. regulation is measured at constant junc tion temperature using low duty cycle pulse testing . c hanges in output voltage due to heating effects are covered by the thermal regulation specification. 7. dropout voltage is defined as the input - to - output differential at which the output voltage drops 2% b elow its nominal value measured at 1v differential. for outputs below 2.5v, dropout voltage is the input - to - output differential with the minimum input voltage 2.5v. 8. ground pin current is the regulator quiescent current. the total current drawn from the sup ply is the sum of the load current plus the ground pin current.
micrel, inc. mic5512/14 april 8, 2013 4 revision 1.1 typical characteristics -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1,000 10,000 100,000 1,000,000 psrr (db) frequency (hz) power supply rejection ratio c out = 1f c in = 1f v in = 3.8v v out = 2.8v i out = 100ma i out = 300ma 10 100 1k 10k 100k 1m 0 20 40 60 80 100 120 140 160 0 50 100 150 200 250 300 dropout voltage (mv) output current (ma) dropout voltage vs. output current v out = 3.3v c in = c out = 1f 0 20 40 60 80 100 120 140 160 180 200 -40 -20 0 20 40 60 80 100 120 dropout voltage (mv) temperature ( c) dropout voltage vs.temperature 50ma 150ma v out = 3.3v c in = c out = 1f 300ma 20 25 30 35 40 45 50 2.5 3.0 3.5 4.0 4.5 5.0 5.5 ground current (a) supply voltage (v) ground current vs. supply voltage 300ma v en = v in v out = 3.3v c in = c out = 1f 100a 36 37 38 39 40 41 42 43 44 45 46 0 50 100 150 200 250 300 ground current (a) load current (ma) ground current vs. load current v in = v en = v out + 1v v out = 3.3v c in = c out = 1f 30 32 34 36 38 40 42 44 46 48 50 -40 -20 0 20 40 60 80 100 120 ground current (a) temperature ( c) ground current vs. temperature 100a 300ma 50ma 150ma v in = v en = v out + 1v v out = 3.3v c in = c out = 1f 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 0 50 100 150 200 250 300 output voltage (v) output current (ma) output voltage vs. output current v in = v en = v out + 1v v out = 3.3v c in = c out = 1f 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 output voltage (v) supply voltage (v) output voltage vs. supply voltage v in = v en v out = 3.3v c in = c out = 1f 50ma 150ma 300ma 3.20 3.25 3.30 3.35 3.40 3.45 3.50 -40 -20 0 20 40 60 80 100 120 output voltage (v) temperature ( c) output voltage vs. temperature 300ma 150ma v in = v out + 1v v out = 3.3v c in = c out = 1f
micrel, inc. mic5512/14 april 8, 2013 5 revision 1.1 typical characteristics (continued) 300 350 400 450 500 550 600 650 700 750 2.5 3 3.5 4 4.5 5 5.5 current limit (ma) supply voltage (v) current limit vs. supply voltage v out = 1.2v c in = c out = 1f
micrel, inc. mic5512/14 april 8, 2013 6 revision 1.1 functional characteristics
micrel, inc. mic5512/14 april 8, 2013 7 revision 1.1 block diagram mic55 xx block diagram
micrel, inc. mic5512/14 april 8, 2013 8 revision 1.1 application information mic5512/14 are high performance 300ma ldos. the mic5 5 12/ 14 include s an auto - discharge circuit that is switched on when the regulator is disabled through the e nable pin. the mic5512/14 regulator s are fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown . input capacitor the mic5512/14 is a high - performance, high - bandwidth device. a n input capacitor of 1 f 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 capaci tors, such as small - valued npo dielectric - type capacitors, help filter out high - frequency noise and are good practice in any rf - based circuit. x5r or x7r dielectrics are recommended for the input capacitor. y5v dielectrics lose most of their capacitance ov er temperature and are therefore, not recommended . output capacitor the mic5512/14 requires an output capacitor of 1 f or greater to maintain stability. the design is optimized for use with low - es r ceramic chip capacitors. high - esr capacitors are not recom mended because they may cause high - frequency oscillation. the output capacitor can be increased, but performance has been optimized for a 1 f ceramic output capacitor and does not improve significantly with larger capacitance. x7r/x5r dielectric - type ceram ic capacitors are recommended because of their temperature performance. x7r - type capacitors change capacitance by 15% over their 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 thei r 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 op erating temperature range . no - load stability unlike many other voltage regulators, the mic5512/14 remain s stable and in regulation with no load. this is especially important in cmos ram keep - alive applications . enable/shutdown the mic5512/14 comes with an active - high enable pin that allows the regulator to be disabled. forcing the enable pin low disables the regulator and sends it into an off mode current state drawing virtually zero current. when disabled the mic55 12/ 14 switches an internal 25? load on the regulator output to discharge the external capacitor. forcing the enable pin high enables the output voltage. the mic5512 enable pin uses cmos technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state o n the output . the mic5514 has an internal pull down resistor on the enable pin to disable the output when the enable pin is floating. thermal considerations the mic5512/14 is designed to provide 30 0ma of continuous current in a very small package. maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. for example if the input voltage is 3.6v, the output voltage is 2.8v, and the output curr ent = 30 0ma. the actual power dissipation of the regu lator circuit can be determined using equation 1 : p d = (v in ? v out1 ) i out + v in i gnd eq. 1 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 equation 2: p d = ( 3.6 v ? 2.8 v) 30 0ma p d = 0. 240 w eq. 2 to determine the maximum ambient operating temperature of the package, use the junction - to - ambient thermal resistance of the device and equation 3 : ? ? 1 ? t ja a j(max) d(max) t t p eq. 3 t j( max ) = 125c, the maximum junction temperature of the die , ja thermal resistance = 92.4 c/w for the dfn package . 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 92.4 c/w. the maximum power dissipation must not be exceeded fo r proper operation.
micrel, inc. mic5512/14 april 8, 2013 9 revision 1.1 for example, when operating the mic 5 5 12 - m ymt at an input voltage of 3.6v and 30 0ma load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as in equation 4 : 0.24 0w = (125c ? t a )/(92.4 c/w ) t a = 102.8 c eq. 4 therefore , the maximum ambient operating temperature allowed in a 1 .6 mm 1 .6 mm dfn package is 102.8 c. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ?regulator thermals? section of mi crel?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. mic5512/14 april 8, 2013 10 revision 1.1 typical application schematic bill of materials item part number manufacturer description qty. c1, c2 grm 155r61a105ke15d murata ( 1 ) 1 f ceramic capacitor, 10 v, x5r, size 0402 2 u1 mic5512 -x x ymt micrel, inc. ( 2 ) single 300ma ldo in 1.6mm 1.6mm thin dfn package 1 mic5514 -x x ymt notes: 1. murata : www.murata.com . 2. micrel , inc.: www.micrel.com .
micrel, inc. mic5512/14 april 8, 2013 11 revision 1.1 pcb layout recommendations top layer bottom layer
micrel, inc. mic5512/14 april 8, 2013 12 revision 1.1 package information ( 1 ) and recommended landing pattern 6 - pin 1.6mm 1.6mm thin dfn (mt ) note: 1. package information is correct as of the publication date. for updates and most current information, go to www.micrel.com . 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 the accuracy or completeness of the information furnished in th is data sheet. this information is not intended as a warranty and micrel does not assume responsibility for its use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this docume nt. except as provided in micrel?s terms and conditions of sale for such products, micrel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including liability or warra nties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right . micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failu re to perform can be reasonably expected to result in a significant injury to the user. a purchaser?s use or sale of micrel products for use in life support appliances, devices or systems is a purchaser?s own risk a nd purchaser agrees to fully indemnify mi crel for any damages resulting from such use or sale. ? 20 13 micrel, incorporated.

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