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mic5265 150ma cap ldo regulator micrel inc. 2180 fortune drive san jose, ca 95131 usa te l +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micre l.com february 2007 m9999-022307 general description the mic5265 is a 150ma ldo in lead-free thin sot-23-5 packaging ideal for applications where cost is the priority. the mic5265 is ideal for any application in portable electronics, including both rf and digital applications. with low output noise and high psrr, the mic5265 is ideal for noise sensitive applications such as rf. while the fast transient response and active shutdown circuitry makes it well-suited for powering digital circuitry. the mic5265 has a 2.7v to 5.5v input operating voltage range, making it ideal for operation from a single cell lithium ion battery or fix ed 3.3v and 5v systems. the mic5265 come with an enable pin and can be put into a zero off-mode current state. the mic5265 offers low dropout voltage (210mv at 150ma), low output noise (57vrms), high psrr and integrates an active shutdown circuit on the output of each regulator to discharge the out put voltage when disabled. data sheets and supporting documentation can be found on micrels web site at: www.micrel.com features ? 2.7v to 5.5v supply voltage. ? low 75a quiescent current per ldo. ? thin sot-23-5 package. ? low noise C 57vrms. ? high psrr C 60db at 1khz. ? low dropout voltage C 210mv at 150ma. ? stable with ceramic output capacitors. ? fast transient response. ? active shutdown. applications ? cellular telephones ? pdas ? gps receivers ____________________________________________________________________________________________________________ typical application mic5265-xxyd5 vin vout byp gnd en rx/synth rf receiver 0.01f 1f 1f 0 -20 -40 -50 -60 -70 0.01 0.1 1 10 100 1000 frequency (khz) power supply rejection ratio -30 v in = v out + 1v v out = 3.1v byp = 0.01fc out = 1f 100ma 150ma 50ma rf power supply downloaded from: http:///
micrel, inc. mic5265 february 2007 2 m9999-022307 ordering information part number output voltage marking code junction temp. range package mic5265-1.5yd5 1.5v n7 15 C40c to +125c pb-free thin sot-23-5 mic5265-1.8yd5 1.8v n7 18 C40c to +125c pb-free thin sot-23-5 mic5265-1.85yd5 1.85v n7 1j C40c to +125c pb-free thin sot-23-5 mic5265-2.5yd5 2.5v n7 25 C40c to +125c pb-free thin sot-23-5 mic5265-2.6yd5 2.6v n7 26 C40c to +125c pb-free thin sot-23-5 mic5265-2.7yd5 2.7v n7 27 C40c to +125c pb-free thin sot-23-5 mic5265-2.8yd5 2.8v n7 28 C40c to +125c pb-free thin sot-23-5 mic5265-2.85yd5 2.85v n7 2j C40c to +125c pb-free thin sot-23-5 mic5265-2.9yd5 2.9v n7 29 C40c to +125c pb-free thin sot-23-5 mic5265-3.0yd5 3.0v n7 30 C40c to +125c pb-free thin sot-23-5 mic5265-3.1yd5 3.1v n7 31 C40c to +125c pb-free thin sot-23-5 mic5265-3.2yd5 3.2v n7 32 C40c to +125c pb-free thin sot-23-5 mic5265-3.3yd5 3.3v n7 33 C40c to +125c pb-free thin sot-23-5 note : 1. other voltage combinations available. contact micrel, inc. for details. downloaded from: http:///
micrel, inc. mic5265 february 2007 3 m9999-022307 pin configuration en gnd byp out vin 3 15 2 4 lead-free thin sot-23-5 (m5) pin description pin number pin name pin function 1 in supply voltage 2 gnd ground 3 en enable/shutdown (input): cmos co mpatible input. logic high = enable; logic low = shutdown. do not leave open. 4 byp reference bypass: connect external 0.01f <= c byp <= 1.0f capacitor to gnd to reduce output noise. may be left open. 5 out regulator output downloaded from: http:///
micrel, inc. mic5265 february 2007 4 m9999-022307 absolute maximum ratings (1) supply input voltage (v in ).................................... 0v to +7v enable input voltage (v en1 ) ................................. 0v to +7v power dissipation (p d ) .......................... interna lly limited (3) junction temperature (t j ) ...........................-40c to 125c lead temperature (solder ing, #sec .)......................... 260c storage temperature (t s ) ............................-55c to 150c eds rating (4) ................................................................. 2kv operating ratings (2) supply input voltage (v in )............................ +2.7v to +5.5v enable input voltage (v en )................................... 0v to +v in junction temperature (t a ) ........................ C40c to +125c junction thermal resistance thin sot-23-5 ( ja ).........................................235 c/w electrical characteristics (5) v en = v in = v out + 1v; i l =100a; c l = 1.0f; c byp = 0.01f per output; t a = 25c, bold values indicate C40c< t a < +85c; unless noted. parameter condition min typ max units output voltage accuracy i out = 100 a -2 -3 2 3 % % line regulation v in = v out +1v to 5.5v 0.05 0.2 % load regulation i out = 0.1ma to 150ma 2 3 % dropout voltage i out = 50ma i out = 150ma 75 210 500 mv mv quiescent current v en < 0.2v 0.2 2 a ground pin current i out = 0ma i out = 150ma 75 80 120 150 a a psrr (ripple rejection) f = 100hz, c byp = 0.1 f, i load C 50ma f = 1khz, c byp = 0.1 f, i load C 50ma f = 10khz, c byp = 0.1 f, i load C 50ma 62 64 64 db db db current limit v out = 0v 225 ma output noise c out = 1.0 f, c byp = 0.1 f, f = 10hz to 100khz 57 v (rms) enable input (en1 and en2) enable input logic low v in = 2.7v to 5.5v, regulator shutdown 0.2 v enable input logic high v in = 2.7v to 5.5v, regulator enabled 1.6 v enable input current v il < 0.4v, regulator shutdown v ih > 1.6v, regulator enabled 0.01 0.01 a a thermal shutdown thermal shutdown temperature 150 c hysteresis 10 c turn-on/turn-off characteristics turn-on time 40 150 s discharge resistance 500 ? 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) Ct a )/ ja . exceeding the maximum allowable power dissipation will result in excessive die temperatur e, and the regulator will go into thermal shutdown. the ja of the mic5265x.xyd5 (all versions) is 235 c/w on a pc board (see thermal consider ations section for further details). 4. devices are esd sensitive. handli ng precautions recommended. human body model, 1.5k in series with 100pf. 5. specification for packaged product only. downloaded from: http:///
micrel, inc. mic5265 february 2007 5 m9999-022307 typical characteristics 0 -20 -40 -50 -60 -70 0.01 0.1 1 10 100 1000 frequency (khz) power supply rejection ratio -30 v in = v out + 1v v out = 3.1v byp = 0.01fc out = 1f 100ma 150ma 50ma 0 -10 -20 -40 -50 -60 -70 0.01 0.1 1 10 100 1000 frequency (khz) power supply rejection ratio -30 -80 v in = v out + 1v v out = 3.1v byp = 0.1fc out = 1f 100ma 150ma 50ma 10 100 1000 10000 100000 1000000 0 -10 -20 -40 -50 -60 -70 0.01 0.1 1 10 100 1000 frequency (khz) power supply rejection ratio -30 v in = v out + 1v v out = 3.1v byp = 1fc out = 1f 100ma 150ma 50ma 0.00 0.05 0.10 0.20 0.25 0.30 0 25 50 75 100 125 150 output current (ma) dropout voltage vs. output current 0.15 125c 25c -40c 0.00 0.05 0.10 0.20 0.25 0.30 -40 -15 10 35 60 85 110 temperature (c) dropout voltage vs. temperature 0.15 150ma 50ma 100ma 10ma 1ma 2.90 2.95 3.00 3.10 3.15 3.20 -40 -15 10 35 60 85 110 temperature (c) dropout voltage vs. temperature 3.05 iload = 100av out = 3.1v v in = v out + 1 3.25 3.30 0 0.5 1 2 2.5 3 0 1 2 3 4 5 input voltage(v) output voltage vs. input voltage 1.5 100a load 150a load 2.5 2.6 2.7 2.8 2.9 3.0 temperature (c) output voltage vs. temperature v in = 3.8v v out = 2.8v c out = 1f i out = 100a 72 73 74 75 76 77 78 79 80 81 82 83 0 30 60 90 120 150 output current (ma) ground pin current vs. output current v in = v out + 1v v out = 3.1v 68 70 72 76 78 -40 -10 20 50 80 110 temperature (c) ground pin current vs. temperature 74 iload = 100a 60 65 70 80 90 -40 -10 20 50 80 110 temperature (c) ground pin current vs. temperature 75 iload = 150ma 85 95 0 10 20 50 70 90 012345 input voltage (v) ground pin current vs. input voltage 30 iload = 100av out = 3.1v v in = v out + 1 40 60 80 downloaded from: http:///
micrel, inc. mic5265 february 2007 6 m9999-022307 typical characteristics (continued) 0 10 20 50 70 90 012345 input voltage (v) ground pin current vs. input voltage 30 iload = 150av out = 3.1v v in = v out + 1 40 60 80 150 170 190 230 270 290 3 3.5 4 4.5 5 5.5 input voltage (v) short circuit current vs. input voltage 210 250 10 100 1000 10000 100000 1000000 10000000 0.001 0.01 0.1 1 10 0.01 0.1 1 10 100 1000 10000 frequency (khz) output noise spectral density v in = 4.2v v out = 2.8v c out = 1.0f byp = 0.1fi out = 150ma downloaded from: http:///
micrel, inc. mic5265 february 2007 7 m9999-022307 functional characteristics line transient response inpu t volta g e (1v/div) outpu t volta g e (20mv/div) time (400s/div) 5.0v 4.0v c out = 1f ceramic c byp = 0.01f i out = 150ma v out = 3.1v v in = v out + 1v load transient response output voltage (50mv/div) output curren t (50ma/div) time (5s/div) 150ma 100a c out = 1f ceramic c byp = 0.01f v out = 3.1v v in = v out + 1v enable pin dela y outpu t volta g e (1v/div) enable volta g e (1v/div) time (10s/div) c in = 1f ceramic c byp = 0.01f i out = 10ma v out = 3.1v v in = v out + 1v shutdown dela y output volta g e (1v/div) enable volta g e (1v/div) time (100s/div) c in = 1f ceramic c out = 1f ceramic i out = 10ma v out = 3.1v v in = v out + 1v downloaded from: http:///
micrel, inc. mic5265 february 2007 8 m9999-022307 block diagram fault reference voltage thermal sensor error amplifier current amplifier startup/ shutdown control quickstart/ noise cancellation under- voltage lockout active shutdown bypout gnd en in mic5265 diagram downloaded from: http:///
micrel, inc. mic5265 february 2007 9 m9999-022307 applications information enable/shutdown the mic5265 comes with an active-high enable pin that allows the regulator in each output to be disabled. 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. this part is cmos and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate stat e on the output. input capacitor the mic5265 is a high performance, high bandwidth device. therefore, it r equires well-bypassed input supplies 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. output capacitor the mic5265 require s an output capacitor for stability. the design requires 1f or greater on each output to maintain stability. the design is optimized for use with low-esr ceramic chip capacitors. high esr capacitors may cause high frequency oscillation. the maximum recommended esr is 300m ? . 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. x7rtype 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. bypass capacitor a capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. the capacitor bypasses the internal referenc e. a 0.01f capacitor is recommended for applications that require low-noise outputs. the bypass ca pacitor can be increased, further reducing noise and improving psrr. turn-on time increases slightly with respect to bypass capacitance. a unique quick-start circuit allo ws the mic5265 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. active shutdown the mic5265 also features an active shutdown clamp, which is an n-channel mosfet that turns on when the device is disabled. this allo ws the output capacitor and load to discharge, de-energizing the load. no-load stability the mic5265 will remain stabl e and in regulation with no load unlike many other volt age regulators. this is especially important in cmos ram keep-alive applications. thermal considerations the mic5265 is designed to provide 150ma of continuous current per output in a very small package. maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. given t hat the input voltage is 5.0v, the output voltage is 2.8v, and the output current is 100ma. the actual power dissipation of the regulator circuit can be determined using the equation: pd = (vin C vout) iout + vin ignd 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. pd = (5.0v C 2.8v) x 150ma pd = 0.33w 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 d t t p (max) (max) tj(max) = 125c, the max. junction temperature of the die ja thermal resistance = 235c/w downloaded from: http:///
micrel, inc. mic5265 february 2007 10 m9999-022307 mic5265 junction-to-ambien t thermal resistance package ja recommended minimum footprint ja 1 sq. copper clad jc sot-23-5 (m5 or d5) 235c/w 125c 145c/w thermal resistance substituting pd for pd(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 235c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the mic5265-2.8yd5 at an input voltage of 5.0v at 150m a with a minimum footprint layout, the maximum ambient operating temperature ta can be determined as follows: w c t c w a / 235 125 33.0 ? = ta = 47.45c therefore, a 2.8v applicati on at 150ma of output current can accept an ambient operat ing temperature of 47c in a sot-23-5 package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the regulator thermals section of micrels 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 downloaded from: http:///
micrel, inc. mic5265 february 2007 11 m9999-022307 package information thin sot-23-5 (m5) 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 appliances, 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 purchasers use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated. downloaded from: http:///

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