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mic5388/9 dual 200ma peak ldo in wafer level chip scale 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 general description the mic5388/9 is an advanced dual ldo ideal for powering general purpose portable devices. the mic5388/9 provides two independently-controlled, high- performance, 200ma peak (150ma continuous) ldos in a miniature 6-bump, 0.5mm pitch, 1.5mm 1.0mm wafer level chip scale package (wlcsp). ideal for battery-powered applications, the mic5388/9 offers 2% accuracy, low dropout voltage (175mv @ 150ma) and low ground current (typically 32 a per ldo). the mic5388/9 can also be put into a zero off mode current state, drawing virtually no current when disabled. when the mic5389 is disabled an internal resistive load is automatically applied to the output to discharge the output capacitor. this ldo offers fast transient response and high psrr while consuming a minimum operating current. data sheets and support documentation can be found on micrel?s web site at www.micrel.com . features ? 2.5v to 5.5v input voltage range ? two 200ma peak output current ldos ? high output accuracy (2%) ? low quiescent current (32a per ldo) ? stable with 1f ceramic output capacitors ? low dropout voltage (175mv at 150ma) ? independent enable pins ? output discharge circuit (mic5389) ? thermal-shutdown protection ? current-limit protection ? 6-bump 1.5mm 1.0mm wlcsp package applications ? camera phones ? mobile phones ? dsc, gps, pmp, and pdas ? portable medical devices ? portable electronics _________________________________________________________________________________________________________________________ typical application camera module power supply july 2011 m9999-071211-a
micrel, inc. mic5388/9 july 2011 2 m9999-071211-a ordering information manufacturing part number (1, 2) marking code voltage v out1 /v out2 junction temperature range package mic5388-sgycs* 8a8 3.3v/1.8v ?40 to +125c 6-bump wafer level chip scale package mic5388-mmycs* 8b8 2.8v/2.8v ?40 to +125c 6-bump wafer level chip scale package mic5388-mlycs* 8c8 2.8v/2.7v ?40 to +125c 6-bump wafer level chip scale package mic5388-mgycs 8d8 2.8v/1.8v ?40 to +125c 6-bump wafer level chip scale package MIC5388-M4YCS* 8e8 2.8v/1.2v ?40 to +125c 6-bump wafer level chip scale package mic5388-g4ycs* 8f8 1.8v/1.2v ?40 to +125c 6-bump wafer level chip scale package mic5389-sgycs* 8a9 3.3v/2.8v ?40 to +125c 6-bump wafer level chip scale package mic5389-mmycs* 8b9 2.8v/2.8v ?40 to +125c 6-bump wafer level chip scale package mic5389-mlycs* 8c9 2.8v/2.7v ?40 to +125c 6-bump wafer level chip scale package mic5389-mgycs 8d9 2.8v/1.8v ?40 to +125c 6-bump wafer level chip scale package mic5389-m4ycs* 8e9 2.8v/1.2v ?40 to +125c 6-bump wafer level chip scale package mic5389-g4ycs* 8f9 1.8v/1.2v ?40 to +125c 6-bump wafer level chip scale package notes: 1. other voltages available. contact micrel marketing for details. 2. mic5389 offers auto-discharge function. * contact micrel marketi ng for availability. pin configuration ball a1 identifier top view bottom view 6-bump, 0.5mm pitch wlcsp (cs) pin description pin number pin name pin function a1 en1 enable regulator 1. acti ve high input. logic high = on; logic low = off. do not leave floating. b1 gnd ground. c1 en2 enable regulator 2. acti ve high input. logic high = on; logic low = off. do not leave floating. c2 vout2 regulator output ? ldo2 b2 vin voltage supply input. a2 vout1 regulator output ? ldo1
micrel, inc. mic5388/9 july 2011 3 m9999-071211-a functional block diagrams mic5388 block diagram mic5389 block diagram
micrel, inc. mic5388/9 july 2011 4 m9999-071211-a absolute maximum ratings (1) supply voltage (v in ) ........................................ ? 0.3v to + 6v enable voltage (v en1, v en2 ). .............................. ? 0.3v to v in power dissipation (p d ) ........................... internally limited (3) lead temperature (solde ring, 10sec .) ....................... 260c junction temperature (t j ) ........................?40c to +125c storage temperature (t s ).........................?65c to +150c esd rating (4) .................................................................. 2kv operating ratings (2) supply voltage (v in )..................................... + 2.5v to + 5.5v enable voltage (v en1 , v en2 ) .............................. ? 0.3v to v in junction temperature (t a ) ........................ ?40c to +125c junction thermal resistance 6-bump, 0.5mm pitch wlcsp ( ja ) ................108c/w electrical characteristics (5) v in = v en1 = v en2 = v out + 1v; higher of the two regulator outputs; i outldo1 = i outldo2 = 100a; c out1 = c out2 = 1f; t j = 25c, bold values indicate ?40c to +125c, unless noted. parameter condition 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 %/v load regulation i out = 100a to 150ma 0.3 1.2 % dropout voltage i out = 50ma i out = 150ma 55 175 110 310 mv ground pin current v en1 = high; v en2 = low; i out = 0ma v en1 = low; v en2 = high; i out = 0ma v en1 = v en2 = high; i out1 = i out2 = 0ma 32 32 60 45 45 85 a ground pin current in shutdown v en1 = v en2 = 0v 0.05 1 a ripple rejection f = 1khz; c out = 1f 73 db current limit v out = 0v 200 325 550 ma output voltage noise c out = 1f, 10hz to 100khz 175 v rms auto-discharge nfet resistance mic5389 only; v en1 = v en2 = 0v; v in = 3.6v 30 ? enable inputs (en1/en2) logic low 0.2 enable input voltage logic high 1.2 v v il 0.2v 0.01 1 enable input current v ih 1.2v 0.01 1 a turn-on time c out = 1f 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 die temperatur e, and the regulator will go into thermal shutdown. 4. devices are esd sensitive. handling pr ecautions recommended. human body model, 1.5k ? in series with 100pf. 5. specification for packaged product only.
micrel, inc. mic5388/9 july 2011 5 m9999-071211-a typical characteristics power supply rejection ratio -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1000 10000 100000 frequency(hz) psrr (db) ` v in = v en = 4.1v v out1 = 2.80v c out1 = 1f/10v 150ma 50ma 100a output voltage vs. input voltage 0 0.5 1 1.5 2 2.5 3 2.533.544.555.5 input voltage (v) output voltage (v) ldo1 100 a ldo1 150ma v out1 = 2.8v v out2 = 1.8v c in = c out = 1 f ldo2 100 a ldo2 150ma output voltage vs. output current 2.50 2.60 2.70 2.80 2.90 3.00 10 30 50 70 90 110 130 150 output current (ma) output voltage (v) v in = v en = v out + 1v v out1 = 2.8v c in = c out = 1f ground current vs. input voltage 25 27 29 31 33 35 37 39 41 43 45 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) ground current ( a) 100a v in = v en2 v out2 = 1.8v c in = c out = 1 f 150ma ground current vs. output current 0 10 20 30 40 50 60 70 80 90 0 15 30 45 60 75 90 105 120 135 150 output current (ma) ground current ( a) v in = 3.8v v out1 = 2.8v v out2 = 1.8v c in = c out = 1 f dual output single output ground current vs. temperature 0 10 20 30 40 50 60 70 80 -40 -20 0 20 40 60 80 100 120 temperature (c) ground current ( a) single output 50ma dual output 100a single output 100a v in = v en = 3.8v v out1 = 2.8v v out2 = 1.8v c in = c out = 1f dropout voltage vs. output current 0 25 50 75 100 125 150 175 0 20 40 60 80 100 120 140 160 output current (ma) dropout voltage (mv) v out1 = 2.8v c in = c out = 1 f dropout voltage vs. temperature 0 20 40 60 80 100 120 140 160 180 200 220 240 -40 -20 0 20 40 60 80 100 120 temperature (c) dropout voltage (mv) 50ma 100ma 150ma c in = c out = 1 f 10ma current limit vs. input voltage 0 100 200 300 400 500 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) current limit (ma) v out1 = 2.8v v out2 = 1.8v c in = c out = 1 f ldo2 ldo1
micrel, inc. mic5388/9 july 2011 6 m9999-071211-a typical characteristics (continued) enable voltage threshold vs. input voltage 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 2.533.544.555.5 input voltage (v) enable voltage (v) en1 off en1 on v out1 = 2.8v c in = c out = 1 f il = 150ma output noise spectral density 0.001 0.01 0.1 1 10 10 100 1,000 10,000 100,000 frequency (hz) noise (v/ hz) v in = 5.21v v out2 = 1.815v(100a) c in = c out2 = 1f noise output (10hz100khz) = 174.54 vrms
micrel, inc. mic5388/9 july 2011 7 m9999-071211-a functional characteristics
micrel, inc. mic5388/9 july 2011 8 m9999-071211-a application information mic5388/9 is a dual 150ma ldo in a miniature 6-bump wlcsp package. the mic5389 includes an auto- discharge circuit for each of the ldo outputs that are activated when the output is disabled. the mic5388/9 regulator is fully protected from damage due to fault conditions through linear cu rrent limiting and thermal shutdown. input capacitor the mic5388/9 is a high-performance, high-bandwidth device. an input capacitor of 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. x5r or x7r dielectrics are recommended for the input capacitor. y5v dielectrics lose most of their capacitance over temperature and are therefore, not recommended. output capacitor the mic5388/9 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 their operat ing 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. no-load stability unlike many other voltage regul ators, the mic5388/9 will remain stable and in regulation with no load. this is especially important in cmos ram keep-alive applications. enable/shutdown the mic5388/9 comes with two active high enable pins that allow each regulator to be disabled 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. when disabled the mic5389 switches a 30 ? (typical) load on the regulator output to discharge the external capacitor. 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. thermal considerations the mic5388/9 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. for example if the input voltage is 3.6v, the output voltage is 2.8v for v out1 , 1.8v 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 = (3.6v ? 2.8v) 150ma + (3.6v - 1.8) 150ma p d = 0.39w 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: ? ? ? ? ? ? ? ? ? = ja a j(max) d(max) tt p t j(max) = 125c, and the maximum junction temperature of the die, ja , thermal resistance = 108c/w.
micrel, inc. mic5388/9 july 2011 9 m9999-071211-a 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 108c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the mic5388-mgycs at an input voltage of 3.6v and 150ma loads at each output with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: 0.39w = (125c ? t a )/(108c/w) t a = 82.88c therefore, a 2.8v/1.8v application with 150ma at each output current can accept an ambient operating temperature of 82.88c in a miniature 6-bump 0.5mm pitch 1.5mm 1.0mm wlcsp package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ?regul ator 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. mic5388/9 july 2011 10 m9999-071211-a mic5388/9 schematic bill of materials item part number manufacturer description qty. c1, c2, c3 c1005x5r1a105k tdk (1) 1f,10v ceramic capacitor, x5r, 0402 3 u1 mic5388/9-xxycs micrel, inc. (2) dual, 200ma peak ldo in wafer level chip scale package 1 notes: 1. tdk: www.tdk.com . 2. micrel, inc.: www.micrel.com .
micrel, inc. mic5388/9 july 2011 11 m9999-071211-a pcb layout recommendations top layer bottom layer
micrel, inc. mic5388/9 july 2011 12 m9999-071211-a package information 6-bump, 0.5mm pitch 1.5mm 1.0mm wafer level chip-scale package (cs) 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 ? 2011 micrel, incorporated.

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