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mic5332 micro-power high performance dual 300ma uldo? 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 april 2008 m9999-042108-b general description the mic5332 is a tiny dual low quiescent current ldo ideal for applications that are power sensitive. the mic5332 integrates two high performance 300ma ldos, and a por generator into a 2mm x 2mm thin mlf ? package. this solution occupies the same pc board area of a single sot-23 package. the mic5332 is designed to reject input noise and provide low output noise with fast transient response so as to respond to any load change quickly even though it is a low quiescent current part. this combination of psrr, low noise and transient response, along with low power consumption makes for a very high performance, yet general purpose product. the mic5332 is a cap design, operating with very small ceramic output capacitors, which reduces required board space and component cost. it is available in fixed output voltages in a tiny 8-pin 2mm x 2mm thin mlf ? leadless package. data sheets and support doc umentation can be found on micrel?s web site at: www.micrel.com. features ? 2.3v to 5.5v input voltage range ? 300ma output current per ldo ? very low quiescent current: 25a per ldo ? por output with programmable delay on ldo2 ? high psrr - >65db on each ldo ? stable with 1f ceramic output capacitors ? tiny 8-pin 2mm x 2mm thin mlf ? package ? ultra-low dropout voltage ? 120mv @ 300ma ? low output voltage noise ? 50vrms ? thermal shutdown protection ? current limit protection applications ? camera phones ? mobile phones ? pdas ? gps receivers ? portable devices ___________________________________________________________________________________________________________ typical application mic5332-xxymt vi/o vcore processor /rst vin en2 vout1 vout2 gnd en1 cset2 por2 10k cin 1f v bat 1f 1f camera dsp power supply circuit
micrel, inc. mic5332 april 2008 2 m9999-042108-b ordering information part number marking code manufacturing part number voltage junction temperature range package mic5332-1.8/1.2ymt wg4 mic5332-g4ymt 1.8v/1 .2v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-2.5/1.2ymt wj4 mic5332-j4ymt 2.5v/1 .2v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-2.8/2.8ymt wmm MIC5332-MMYMT 2.8v/2 .8v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-2.8/2.85ymt wmn mic5332-mnymt 2.8v/2 .85v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-2.85/2.85ymt wnn mic5332-nnymt 2.85v/2 .85v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-3.0/2.8ymt wpm mic5332-pmymt 3.0v/2 .8v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-3.0/2.85ymt wpn mic5332-pnymt 3.0v/2 .85v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? mic5332-3.0/3.0ymt wpp mic5332-ppymt 3.0v/3 .0v ?40 to +125c 8-pin 2mm x 2mm thin mlf ? notes for other voltage options. contac t micrel marketing for details. pin 1 identifier = . mlf ? is a green rohs compliant package. lead fini sh is nipdau. mold compound is halogen free. pin configuration 1 vin gnd por2 en2 8 vout1 vout2 cset2 en1 7 6 5 2 3 4 8-pin 2mm x 2mm thin mlf ? (mt) (top view) pin description pin number pin name pin function 1 vin supply input. 2 gnd ground. 3 por2 power-on reset output (regulator 2): open-drain output. active low indicates an output under-voltage condition on regulat or 2 when the device is enabled. 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 cset2 delay set input (regulator 2): connect external capacitor to gnd to set the internal delay for the por2 output. when left open, there is no delay. this pin cannot be grounded. 7 vout2 regulator output ? ldo2. 8 vout1 regulator output ? ldo1.
micrel, inc. mic5332 april 2008 3 m9999-042108-b absolute maximum ratings (1) supply voltage (v in ) ............................................. 0v to +6v enable input voltage (v en1 , v en2 ) .......................... 0v to v in por2 voltage (v por2 ) .......................................... 0v to +6v power dissipation .................................. in ternally limited (3) lead temperature (solde ring, 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 en1 , v en2 ) .......................... 0v to v in por2 voltage (v por2 ) ....................................... 0v to +5.5v junction temperature (t j ) ........................ ?40c to +125c junction thermal resistance 2mm x 2mm thin mlf-8 ( ja ) ...........................90c/w electrical characteristics (5) v in = v en1 = v en2 = v out + 1.0v, higher of the two regulator outputs; i out1 = i out2 = 100a; c out1 = c out2 = 1f; t j = 25c, bold values indicate ?40c < t j < +125c; unless noted. parameter condition min typ max units variation from nominal v out ?1.0 +1.0 % output voltage accuracy variation from nominal v out ; ?40c to +125c ?2.0 +2.0 % 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 300ma 0.2 0.5 % dropout voltage i out = 50ma i out = 300ma 20 120 40 240 mv mv ground current v en1 = high; v en2 = low; i out = 100a to 300ma v en1 = low; v en2 = high; i out = 100a to 300ma v en1 = v en2 = high; i out1 = 300ma, i out2 = 300ma 25 25 40 50 50 75 a a a ground current in shutdown v en1 = v en2 < 0.2v 0.01 1.0 a ripple rejection f = 1khz; c out = 2.2f; f = 20khz; c out = 2.2f; 65 45 db db current limit v out = 0v 350 550 800 ma output voltage noise c out =1f, 10hz to 100khz 50 v rms enable inputs (en1/en2 ) logic low 0.2 v enable input voltage logic high 1.2 v v il 0.2v 0.01 1.0 a enable input current v ih 1.2v 0.01 1.0 a turn-on time turn-on time (ldo1 and 2) c out = 1f (enable of first ldo) c out = 1f (enable of second ldo after first enabled) 140 110 500 500 s s por2 output (ldo2 only) low threshold, % of v out2 (por2 on) 88 % v th high threshold, % of v out2 (por2 off) 98 % v ol por2 output logic low voltage; il = 250a 0.02 0.1 v i por2 por2 leakage current, por2 off ?1.0 0.01 +1.0 a
micrel, inc. mic5332 april 2008 4 m9999-042108-b parameter condition min typ max units cset2 input cset2 pin current source v cset2 = 0v 0.8 1.4 2 a cset2 pin threshold voltage por2 = high 1.21 1.25 1.29 v 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 temper ature, and the regulator will go into thermal shutdown. 4. devices are esd sensitive. handling precautions recommended. human body model, 1.5k ? in series with 100pf. 5. specification for packaged product only.
micrel, inc. mic5332 april 2008 5 m9999-042108-b typical characteristics 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 psrr frequency (hz) 50ma 300ma v in = 2.3v v out = 1.2v c out = 2.2f 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 psrr frequency (hz) 50ma 300ma v in = 2.3v v out = 1.2v c out = 1f 0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0 50 100 150 200 250 300 load current (ma) dropout voltage vs. load current v out = 2.8v c out = 1f 0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 temperature (c) dropout voltage vs. temperature v out = 2.8v c out = 1f -40 -20 0 20 40 60 80 100 120 100ma 10ma 50ma 300ma 25 27 29 31 33 35 37 39 41 2.5 3 3.5 4 4.5 5 5.5 supply voltage (v) ground current vs. supply voltage v out1 = 2.5v v out2 = 1.2v c out1 = 1f c out2 = 1f i out1 = 300ma i out2 = 300ma dual ldo enabled single ldo enabled 25 27 29 31 33 35 37 39 41 0 50 100 150 200 250 300 load current (ma) ground current vs. load current v in = v out + 1v v out1 = 2.5v v out2 = 1.2v c out1 = 1f c out2 = 1f dual ldo enabled single ldo enabled 30 33 36 39 42 45 ground current vs. temperature en1 = en2 = v in v in = v out + 1v v out = 2.8v c out = 1f 100ma 300ma 10ma temperature (c) -40 -20 0 20 40 60 80 100 120 2.800 2.804 2.808 2.812 2.816 2.820 0 50 100 150 200 250 300 load current (ma) output voltage vs. load current v in = v out + 1v v out = 2.8v c out = 1f 2.5 2.6 2.7 2.8 2.9 3.0 output voltage vs. temperature v in = v out + 1v v out = 2.8v c out = 1f temperature (c) -40 -20 0 20 40 60 80 100 120 350 400 450 500 550 600 650 700 750 800 850 2.5 3 3.5 4 4.5 5 5.5 supply voltage (v) current limit vs. supply voltage c in = 1f c out = 1f 100 1k 10k 100k 100 1k 10k 100k cset2 (pf) v in = 3.6v v out = 1.2v c out = 1f ldo2 por2 delay vs. cset2 0 0.2 0.4 0.6 0.8 1.2 1.0 output noise spectral density 10 1k 10k 100k frequency (hz) 100 1m v in = v out + 1v v out = 2.8v c out = 1f load = 50ma
micrel, inc. mic5332 april 2008 6 m9999-042108-b functional characteristics
micrel, inc. mic5332 april 2008 7 m9999-042108-b functional diagram en1 reference enable thermal shutdown ldo1 en2 ldo2 cset2 vin vout1 vout2 gnd por delay por2 mic5332 block diagram
micrel, inc. mic5332 april 2008 8 m9999-042108-b application information mic5332 is a dual 300ma ldo, with an integrated power on reset (por) for the second regulator. the mic5332 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. input capacitor the mic5332 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 prov ide 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 mic5332 requires an output 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 incr eased, 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 equiva lent operating temperature range. no-load stability unlike many other voltage regulators, t he mic5332 will remain stable and in regulation with no load. this is especially import in cmos ram keep-alive applications. enable/shutdown the mic5332 comes with dual 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. 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 indetermi nate state on the output. power on reset the second regulator has a power on reset status pin (por2). this pin is an open drain output. when ldo2 is enabled an active low por2 indicates an under voltage condition on v out2 . the por2 status signal can be programmed for a delay of 1sec/f by placing a capacitor from the cset2 pin to ground. zero delay is added by leaving the cset2 pin open circuit. thermal considerations the mic5332 is designed to provide 300ma of continuous current for both outputs in a very small package. maximum ambient operating temperature can be calculated based upon the output current and the voltage drop across the part. for example if the input voltage is 3.6v, the output voltage is 3.0v for v out1 , 2.8v for v out2 and the output current = 300ma. 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 ? 3.0v) 300ma + (3.6v -2.8) 300ma p d = 0.42w 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) t t p t j(max) = 125c, and the maximum junction temperature of the die, ja , thermal resistance = 90c/w. 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 dissipati on must not be exceeded for proper operation. for example, when operati ng the mic5332-pmymt at an input voltage of 3.6v and 300ma loads at each output with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: 0.42w = (125c ? t a )/(90c/w) t a = 87.2c
micrel, inc. mic5332 april 2008 9 m9999-042108-b therefore, a 3.0v/2.8v application with 300ma at each output current can accept an ambient operating temperature of 87c 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. mic5332 april 2008 10 m9999-042108-b mic5332 typical a pplication circuit vin gnd vout1 cset2 u1 mic5332-xxymt por2 en1 vout2 en2 r3 10k vin c1 1f c4 0.1f c2 1f c3 1f j1 vin j3 por j4 en2 j5 en1 j2 gnd j6 vout1 j7 gnd j8 vout2 1 3 5 2 4 8 7 6 r2 10k r1 10k bill of materials item part number manufacturer description qty c1, c2, c3 c1608x5r0j105k tdk (1) capacitor, 1f ceramic, 6.3v, x5r, size 0603 3 c4 vj0603y104kxxat vishay (2) capacitor, 0.1f ceramic, 10v, x7r, size 0603 1 r1, r2, r3 crcw06031002fkeye3 vishay (2) resistor, 10k ? , 1%, 1/16w, size 0603 3 u1 mic5332-xxymt micrel (3) ucap ldo, dual 300ma, size 2mm x 2mm thin mlf ? 1 notes: 1. tdk: www.tdk.com 2. vishay: www.vishay.com 3. micrel, inc.: www.micrel.com
micrel, inc. mic5332 april 2008 11 m9999-042108-b pcb layout recommendations 1400 (mil) 1350 (mil) top layer 1400 (mil) 1350 (mil) bottom layer
micrel, inc. mic5332 april 2008 12 m9999-042108-b package information 8-pin 2mm x 2mm thin mlf ? (mt) 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 the information furnished by micrel in this data sheet is belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. 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 can reasonably be expected to result in personal injury. life suppo rt devices or systems are devices or systems that (a) are in tended 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 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. ? 2007 micrel, incorporated.

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