View MIC5528-33YMT_7855130.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

mic5528 high - performance 500ma ldo in thin and extra thin dfn packages general description the mic5528 is a low - power, cap, low dropout regulator designed for opt imal performance in a very - small footprint. it is capable of sourcing up to 500ma of output current while only drawing 38a of operating current . this high - performance ldo is a cap design in a thermally enhanced 1.2mm 1 .2mm extra thin (0.4mm ht.) dfn package. it operates with small ceramic output capacitor for stability, thereby reducing requi red board space. ideal for battery - op erated applications, the mic5528 offers 2 % accuracy, extremely low dropout voltage ( 260 mv @ 50 0ma), and can regulate output voltages down to 1.0v. equipped with a ttl logic - compatible enable pin, the mic 5528 can be pu t into a zero - off - mode current state, drawing no current when disabled. the mic5528 is a cap design, operating with very small ceramic output capacitors for stability, reducing required b oard space and component cost for space - critical applications. the m ic5528 has an operating junction temp erature range of ? 40c to 125c . 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 voltages down to 1.0v ? 2% room temperature accuracy ? low quiescent current 38a ? stable with 2.2 f ceramic output capacitors ? low dropout voltage 260mv @ 500ma ? auto d ischarge and internal enable p ulldown ? thermal - shutdown and current - limit protec tion ? 6 - pin 1.2mm 1.2mm e xtra t hin dfn package ? 6 - pin 1.2mm 1.2mm t hin dfn package applications ? portable communication equipment ? dsc, gps, pmp, and pdas ? portable medical devices ? 5v pol applications typical application micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com may 5, 2014 revision 1.1
micrel, inc. mic5528 ordering information part number marking code output voltage ( 1 ) auto - discharge en pulld own temperature range package ( 2 , 3 , 4 ) mic5528 - 3.3ymt cf 3.3v yes yes ? 40c to +125c 6 - pin 1.2mm 1.2mm tdfn mic5528 - 2.8 ymx ci 2.8v yes yes ? 40c to +125c 6 - pin 1.2mm 1.2mm xtdfn mic5528 - 3.3ymx cf 3.3v yes yes ? 40c to +125c 6 - pin 1.2mm 1.2mm xtdfn note s : 1. other voltages available. contact micrel for details. 2. thin dfn = pin 1 identifier. 3. extra thin dfn = pin 1 identifier. 4. extra thin and thin dfn are green, rohs - compliant package s . lead finish is nipdau. mold compound is halogen free. pin configuration 6 - pin 1.2mm 1.2mm thin dfn ( mt) (top view) 6 - pin 1.2mm 1.2mm extra thin dfn ( mx) (top vie w) pin description pin number pin name xtdfn -6 pin function 1 , 2 v out output voltage. when disabled the mic5528 switches in an internal 25? load to discharge the external capacitors. 3 gnd ground . 4 en enable input: acti ve high. high = on; low = off. the mic5528 h as an internal pulldown and this pin can be left floating. 5 nc no connection. 6 vin supply input. ep epad exposed heatsink pad. connect to gnd for best thermal performance. may 5, 2014 2 revision 1.1
micrel, inc. mic5528 absolute maximum ratings ( 5 ) 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 (7) lead temperature (soldering, 10sec) ........................ 260c junction temperature (t j ) ........................ ? 40c to +150 c storage temperature (t s ) ......................... ? 65c to +150c esd rating ( 8) .................................................................. 3 kv operating ratings ( 6 ) supply voltage (v in ) ......................................... 2.5 v to 5.5 v enable voltage (v en ) .............................................. 0v to v i n junction temperature (t j ) ........................ ? 40c to + 12 5c junction thermal resistance 1.2mm 1.2mm extra thin dfn - 6 ( ja ) ......... 173 c/w electrical characteristics ( 9 ) v in = v en = v out + 1v; c in = c out = 2.2 f; i out = 100 a ; t j = 25c, bold values indicate ? 40c to + 8 5c, 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 +85c ? 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 ( 10 ) i out = 100 a to 500ma 14 65 mv dropout voltage ( 11 ) i out = 150ma i out = 500ma 80 260 180 500 mv ground pin current ( 12 ) i out = 0ma i out = 500ma 38 42 55 65 a ground pin current in shutdown v en = 0v 0.05 1 a ripple rejection f = 100 hz , i out = 100ma 7 0 db f = 1khz , i out = 100ma 60 db current limit v out = 0v 525 800 ma output voltage noise 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 pulldown resistor 4 0? enable input voltage logic low 0.2 v logic high 1.2 enable input current v en = 0v 0.01 1 a v en = 5.5 v 1.4 2 turn -o n time i out = 1 5 0 ma 50 125 s notes: 5. exceeding the absolute maximum rating can damage the device. 6. the device is not guaranteed to function outside its operating rating. 7. 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 temperature, and the regulator will go into thermal shutdown. 8. devices are esd se nsitive. handling precautions are recommended. human body model, 1.5k in series with 100pf. 9. specification for packaged product only. 10. regulation is measured at constant junction temperature using low duty cycle pulse testing. changes in output vol tage due to heating effects are covered by the thermal regulation specification. 11. dropout voltage is defined as the input - to - output differential at which the output voltage drops 2% below 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. 12. ground pin current is the regulator quiescent current. the total current drawn from the supply is the sum of the load current plus the ground pin current. may 5, 2014 3 revision 1.1
micrel, inc. mic5528 typical characteristics 0 20 40 60 80 100 120 140 160 180 200 220 240 260 0 50 100 150 200 250 300 350 400 450 500 dropout voltage (mv) output current (ma) dropout voltage vs. output current v out = 3.3v c in = c out = 2.2f 0 50 100 150 200 250 300 350 -40 -20 0 20 40 60 80 dropout voltage (mv) temperature ( c) dropout voltage vs.temperature 50ma 300ma 500ma v out = 3.3v c in = c out = 2.2f 20 25 30 35 40 45 50 55 2.5 3 3.5 4 4.5 5 5.5 ground current (a) supply voltage (v) ground current vs. supply voltage 500ma 100a v en = v in v out = 3.3v c in = c out = 2.2f 36 37 38 39 40 41 42 43 44 45 46 0 50 100 150 200 250 300 350 400 450 500 ground current (a) load current (ma) ground current vs. load current v in = v en = v out + 1 v out = 3.3v c in = c out = 2.2f 30 32 34 36 38 40 42 44 46 48 50 -40 -20 0 20 40 60 80 ground current (a) temperature ( c) ground current vs. temperature 100a 300ma 500ma v in = v en = v out + 1v v out = 3.3v c in = c out = 2.2f 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 0 100 200 300 400 500 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 = 2.2f 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 + 1 v out = 3.3v c in = c out = 2.2f 500ma 300ma 50ma 3.2 3.25 3.3 3.35 3.4 3.45 3.5 -40 -20 0 20 40 60 80 output voltage (v) temperature ( c) output voltage vs.temperature 300ma v in = v out + 1v v out = 3.3v c in =c out = 2.2f may 5, 2014 4 revision 1.1
micrel, inc. mic5528 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 = 3.3v c in = c out = 2.2f 0.001 0.01 0.1 1 10 noise v/hz frequency (hz) output noise spectral density (mic5528 - 3.3ymt) v in = v en1 = 4.5v c out = 2.2f v out = 3.3v 10 100 1k 10k 100k 1m 10m may 5, 2014 5 revision 1.1
micrel, inc. mic5528 functional characteristics may 5, 2014 6 revision 1.1
micrel, inc. mic5528 functional block diagram may 5, 2014 7 revision 1.1
micrel, inc. mic5528 application information the mic5528 is a high - performance, low - power 500ma ldo. the mic5528 includes an auto - discharge circuit that is switched on when the regulator is disabled through the enable pin. the mic5528 also offers an internal pulldown resistor on the enable pin to ensure the output is disabled if the control signal is tri - stated. the mic5528 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. input c apacitor the mic5 528 is a high - performance, high - bandwidth device. a n input capacitor of 2.2 f is required from the input to ground to provide stability. low - esr ceramic capacitors provide optimal per formance at a minimum of space. additional high - frequenc y capacitors, 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 capaci tance over temperature and are therefore, not recommended . output capacitor the mic 5528 requires an output capacitor of 2.2 f or greater to maintain stability. the design is optimized for use with low - es r ceramic chip capacitors. high - esr capacitors are no t recommended because they may cause high - frequency oscillation. the output capacitor can be increased, but performance has been optimized for a 2.2 f 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 their operating temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors cha nge 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 equ ivalent operating temperature range. no - load stability unlike many other voltage regulators, the mic5528 remains stable and in regulation with no load. this is especially important in cmos ram keep - alive applications. enable/shutdown the mic5 528 comes wi th an active - high enable pin that allows the regulator to be disabled. forcing the enable pin low disables the regulator and sends it into a n off mode current state drawing virtually zero current . when disabled the mic5528 switches an internal 25? load on the regulator output to discharge the external capacitor . forcing the enable pin high enables the output voltage. the mic5528 has an internal pull down resistor on the enable pin to disable the output when the enable pin is floating. thermal considerations the mic5528 is designed to provide 500ma 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 3.3v, and the output current = 500ma. the actual power dissipation of the regulator circuit can be determined using equation 1 : p d = (v in v out )i out + v in i gnd eq. 1 because this device is cmos and the ground current is typically <10 0a over the load range, the power dissipation contrib uted by the ground current is < 1% and can be ignored equation 2 : w 150 . 0 p ma 500 v 3 . 3 v 6 . 3 p d d u eq. 2 to determine the maximum ambient operating temperature of the package, use the junction - to - ambient thermal resistance of the device equation 3 : ? ? 1 ? t ja a ) max ( j ) max ( d t t p eq. 3 t j(max) = 125c, the maximum junction temperature of the die, ja thermal resista nce = 173c/w for the xtdfn package. may 5, 2014 8 revision 1.1
micrel, inc. mic5528 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 173 c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the mic5528 - 3.3ymx at an input voltage of 3.6v and a 500ma load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as in equation 4 : ( ) ( ) c 99 t w / c 173 / t c 125 w 15 . 0 a a = ? = 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 may 5, 2014 9 revision 1.1
micrel, inc. mic5528 typical application schematic bill of materials item part number manufacturer description qty. c1, c2 grm188r71a225ke15d murata ( 13 ) capacitor, 2.2f ceramic, 10v, x5r, size 0603 2 u1 mic5528 - xxymt micrel, inc .( 14) high - performance 500ma ldo in thin and extra thin dfn packages 1 mic5528 -x xymx notes: 13. murata : www.murata.com . 14. micrel , inc.: www.micrel.com . may 5, 2014 10 revision 1.1
micrel, inc. mic5528 pcb layout recommendations top layer bottom layer may 5, 2014 11 revision 1.1
micrel, inc. mic5528 package information ( 15) and recommended landing pattern 6 - pin 1.2mm 1.2mm thin dfn (mt) note: 15. package information is correct as of the publication date. for updates and most current information, go to www.micrel.com . may 5, 2014 12 revision 1.1
micrel, inc. mic5528 package information ( 15) and recommended landing pattern (continued) 6 - pin 1.2mm 1.2mm extra thin dfn (mx ) may 5, 2014 13 revision 1.1
micrel, inc. mic5528 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 inform ation 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 estoppe l or otherwise, to any intellectual property rights is granted by this document. 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 re lating to the sale and/or use of micrel products including liability or warranties 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 failure 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, devi ces or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 20 13 micrel, incorporated. may 5, 2014 14 revision 1.1

▲Up To Search▲

Price & Availability of MIC5528-33YMT

	To Download MIC5528-33YMT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .