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mic5370/1 high performance dual 150ma ldo 1.6mm x1.6mm thin mlf ? 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 june 2009 m9999-063009-b general description the mic5370/1 is an advanced dual ldo ideal for powering general purpose portable devices. the mic5370/1 provides two independently controlled, high performance 150ma ldos in a tiny 1.6mm x 1.6mm thin mlf ? package. ideal for battery powered applications, the mic5370/1 offers 2% initial accuracy, low dropout voltage (155mv@150ma) and low ground current (typically 32 a per ldo). the mic5370/1 can also be put into a zero-off- mode current state, drawing virtually no current when disabled. when the mic5371 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. the mic5370/1 is available in fixed output voltages in a lead-free (rohs compliant) 6-pin 1.6mm x 1.6mm thin mlf ? package. 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 150ma output current ldos ? high output accuracy ? 2% initial accuracy ? low quiescent current ? 32a per ldo ? stable with 1uf ceramic output capacitors ? independent enable pins ? low dropout voltage ? 155mv at 150ma ? thermal shutdown protection ? current limit protection ? output discharge circuit ? mic5371 ? available in 6-pin 1.6mm x 1.6mm thin mlf ? package applications ? camera phones ? mobile phones ? gps, pmp, pdas and handhelds ? portable electronics ___________________________________________________________________________________________________________ typical application mic5370/1-xxymt vin en1 en2 1f 1f vout1 vout2 1f vbat gnd i/o vcore camera dsp power supply circuit
micrel, inc. mic5370/1 june 2009 2 m9999-063009-b block diagrams vin en1 gnd vout1 vout2 ldo1 enable reference ldo2 en2 mic5370 block diagram vin en1 gnd vout1 vout2 ldo1 enable reference ldo2 en2 auto discharge mic5371 block diagram
micrel, inc. mic5370/1 june 2009 3 m9999-063009-b ordering information part number manufacturing part number marking code voltage junction temp. range package lead finish mic5370-3.3/3.3ymt mic 5370-ssymt 8ss 3.3v/3.3v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-3.3/3.0ymt mic 5370-spymt sp8 3.3v/3.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-3.3/2.8ymt mic 5370-smymt sm8 3.3v/2.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-3.3/1.8ymt mic 5370-sgymt sg8 3.3v/1.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-3.0/3.0ymt mic 5370-ppymt p8p 3.0v/3.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-3.0/2.8ymt mic 5370-pmymt pm8 3.0v/2.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-2.8/2.8ymt mic5370-mmymt mm8 2.8v/2.8 v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-2.8/1.8ymt mic5370-mgym t mg8 2.8v/1.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-2.8/1.5ymt mic5370-mfymt mf8 2.8v/1.5 v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-2.8/1.2ymt mic5370-m4ym t j48 2.8v/1.2v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-1.8/1.5ymt mic5370-gfymt gf8 1.8v/1.5 v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-1.8/1.2ymt mic5370-g4ym t 8g4 1.8v/1.2v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5370-1.2/1.0ymt mic 5370-4cymt 84c 1.2v/1.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.3/3.3ymt* mic 5371-ssymt 9ss 3.3v/3.3v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.3/3.0ymt* mic 5371-spymt 9sp 3.3v/3.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.3/2.8ymt* mic 5371-smymt 9sm 3.3v/2.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.3/1.8ymt* mic 5371-sgymt 9sg 3.3v/2.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.0/3.0ymt* mic 5371-ppymt 9pp 3.0v/3.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-3.0/2.8ymt* mic 5371-pmymt 9pm 3.0v/3.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-2.8/2.8ymt* mic5371-mmymt 9mm 2.8v/2.8 v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-2.8/1.8ymt* mic5371-mgym t 9mg 2.8v/1.8v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-2.8/1.5ymt* mic5371-mfym t 9mf 2.8v/1.5v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-2.8/1.2ymt* mic5371-m4ym t 9m4 2.8v/1.2v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-1.8/1.2ymt* mic5371-g4ym t 9g4 1.8v/1.2v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free mic5371-1.2/1.0ymt* mic 5371-4cymt 94c 1.2v/1.0v ?40 to +125c 6-pin 1.6x1.6 thin mlf ? pb-free note: 1. other voltages available. contact micrel for details. 2. thin mlf ? pin 1 identifier = 3. thin mlf ? is a green rohs compliant package. level fini sh is nipdau. mold compound is halogen free. * mic5371 offers auto-discharge function.
micrel, inc. mic5370/1 june 2009 4 m9999-063009-b pin configuration 1 vin gnd en2 6 vout1 vout2 en1 5 4 2 3 6-pin 1.6mm x 1.6mm thin mlf ? (mt) pin description pin number pin name pin function 1 vin supply input 2 gnd ground 3 en2 enable input (regulator 2). active hi gh input. logic high = on; logic low = off; do not leave floating. 4 en1 enable input (regulator 1). active hi gh input. logic high = on; logic low = off; do not leave floating. 5 vout2 regulator output ? ldo2 6 vout1 regulator output ? ldo1 epad hs pad heatsink pad internally connected to ground.
micrel, inc. mic5370/1 june 2009 5 m9999-063009-b 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 j ) ........................ ?40c to +125c junction thermal resistance 1.6x1.6 thin mlf-6 ( ja ) ...................................90c/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 % dropout voltage i out = 50ma i out = 150ma 55 155 110 310 mv 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 57 45 45 85 a a a ground pin current in shutdown v en1 = v en2 = 0v 0.05 1 a ripple rejection f = 1khz; c out = 1f 60 db current limit v out = 0v 200 325 550 ma output voltage noise c out = 1f, 10hz to 100khz 200 v rms auto-discharge nfet resistance mic5371 only; v en1 = v en2 = 0v; v in = 3.6v 30 ? enable inputs (en1/en2) logic low 0.2 v enable input voltage logic high 1.2 v v il 0.2v 0.01 1 a 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 maxi mum 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. mic5370/1 june 2009 6 m9999-063009-b typical characteristics 0 power supply rejection ratio 100 frequency (hz) 10 1k 10k 1m v in = v en = 3.8v v out = 1.8v c out = 1f 50ma 100a 100k 10m 150ma 0 0.5 1.5 2.5 2.5 3.5 4.5 5.5 input voltage (v) 1.0 2.0 3.0 3.0 4.0 5.0 output voltage vs. input voltage v out1 = 2.8v v out2 = 1.8v c in = c out =1f ldo1-150ma ldo1-100a ldo2-100a ldo2-150ma 2.70 2.75 2.80 2.85 2.90 02 55 07 5 100 125 150 output current (ma) output voltage vs. output current v in = v en = v out + 1v v out = 2.8v c in = c out = 1f 20 22 24 26 28 30 32 34 36 38 40 2.5 3.5 4.5 5.5 input voltage (v) 3.0 4.0 5.0 ground current vs. input voltage v in = v en = 2.8v v out2 = 1.8v c in = c out = 1f 50ma 100a 150ma 0 10 20 30 40 50 60 70 80 02 55 07 5 100 125 150 output current (ma) ground current vs. output current v in = 3.8v v out1 = 2.8v v out2 = 1.2v c in = c out = 1f dual output single output 0 10 20 30 40 50 60 ground current vs. temperature -40 -20 0 20 40 60 80 100 120 temperature (c) v in = v en = 3.8v v out1 = 1.8v v out2 = 2.8v c in = c out = 1f single output(100a) dual outputs(100a) single output(50ma) 0 20 40 60 80 100 120 140 160 180 02 55 07 5 100 125 150 output current (ma) dropout voltage vs. output current v out = 2.8v c in = c out = 1f 0 50 100 150 200 250 dropout voltage vs. temperature -40 -20 0 20 40 60 80 100 120 temperature (c) 10ma 150m a 100m a 50ma c in = c out = 1f 0 100 200 300 400 500 2.5 3.5 4.5 5.5 input voltage (v) 3.0 4.0 5.0 current limit vs. input voltage v out1 = 1.8v v out2 = 2.8v c in = c out = 1f ldo2 ldo1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 2.5 3.0 3.5 4.0 4.5 5.0 5.5 input voltage (v) enable voltage vs. input voltage v out1 = 2.5v c in = c out = 1f load = 150ma en1 off en1 on 0.001 0.01 0.1 1 10 output noise spectral density 100 frequency (hz) 10 1k 10k 1m 100k 10m v in = 4.5v v out = 1v c out1 = c out2 1f
micrel, inc. mic5370/1 june 2009 7 m9999-063009-b functional characteristics
micrel, inc. mic5370/1 june 2009 8 m9999-063009-b application information mic5370/1 is a dual 150ma ldo in a small 1.6mm x 1.6mm package.. the mic5371 includes an auto- discharge circuit for each of the ldo outputs that are activated when the output is disabled. the mic5370/1 regulator is fully protected from damage due to fault conditions through linear cu rrent limiting and thermal shutdown. input capacitor the mic5370/1 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 mic5370/1 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 equiva lent operating temperature range. no-load stability unlike many other voltage regul ators, the mic5370/1 will remain stable and in regulation with no load. this is especially important in cmos ram keep-alive applications. enable/shutdown the mic5370/1 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 mic5371 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 mic5370/1 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) 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 dissipation must not be exceeded for proper operation.
micrel, inc. mic5370/1 june 2009 9 m9999-063009-b for example, when operating the mic5370-mgymt 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 )/(90c/w) t a = 89.9c therefore, a 2.8v/1.8v application with 150ma at each output current can accept an ambient operating temperature of 89.9c in a 1.6mm x 1.6mm 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. mic5370/1 june 2009 10 m9999-063009-b u1 mic5370/1-xxymt vin en1 c3 1f/10v vout1 vout2 gnd en2 j1 vin j7 en1 j2 gnd c1 1f/10v c2 1f/10v j3 vout1 j5 vout2 j8 en2 j4 gnd j6 gnd 1 3 6 5 4 2 bill of materials item part number manufacturer description qty. c1, c2, c3 grm188r60j225ke19d murata (1) capacitor, 1f ceramic, 10v, x5r, size 0402 3 u1 mic5370/1-xxymt micrel (2) dual, 150ma ldo, size 1.6mm x 1.6mm thin mlf ? 1 notes: 1. murata: www.murata.com 2. micrel, inc.: www.micrel.com
micrel, inc. mic5370/1 june 2009 11 m9999-063009-b pcb layout recommendations top layer bottom layer
micrel, inc. mic5370/1 june 2009 12 m9999-063009-b package information 6-pin 1.6mm x 1.6mm 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 pers onal injury. life support devices or system s 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. ? 2008 micrel, incorporated.

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