august 2004 1 mic5213 mic5213 micrel general descriptionthe mic5213 is a cap 80ma linear voltage regulator in the teeny? sc-70 package. featuring half the footprint of thestandard sot-23 package, this teeny? sc-70 regulator has very low dropout voltage (typically 20mv at light loads and 300mv at 80ma) and very low ground current (225 a at 20ma output). it also offers better than 3% initial accuracyand includes a logic-compatible enable input. the cap regulator design is optimized to work with low- value, low-cost ceramic capacitors. the outputs typicallyrequire only 0.47 f of output capacitance for stability. designed especially for hand-held, battery-powered devices,the mic5213 can be controlled by a cmos or ttl compatible logic signal. when disabled, power consumption drops nearly to zero. if on-off control is not required, the enable pin may be tied to the input for 3-terminal operation. the ground current of the mic5213 increases only slightly in dropout, further prolonging battery life. key mic5213 features include current limiting, overtemperature shutdown, and protection against reversed battery. the mic5213 is available in 2.5v, 2.6v, 2.7v, 2.8v, 3.0v, 3.3v, 3.6v, and 5.0v fixed voltages. other voltages are available; contact micrel for details. typical applications 152 34 0.47f v out enable shutdown lax regulator circuit ordering information part number marking voltage junction temp. range package standard pb-free standard pb-free mic5213-2.5bc5 mic5213-2.5yc5 lam lam 2.5v C40 c to +125 c sc-70-5 mic5213-2.6bc5 mic5213-2.6yc5 laq laq 2.6v C40 c to +125 c sc-70-5 mic5213-2.7bc5 mic5213-2.7yc5 lal lal 2.7v C40 c to +125 c sc-70-5 mic5213-2.8bc5 mic5213-2.8yc5 laj laj 2.8v C40 c to +125 c sc-70-5 mic5213-3.0bc5 mic5213-3.0yc5 lag lag 3.0v C40 c to +125 c sc-70-5 mic5213-3.3bc5 mic5213-3.3yc5 lae lae 3.3v C40 c to +125 c sc-70-5 mic5213-3.6bc5 mic5213-3.6yc5 lad lad 3.6v C40 c to +125 c sc-70-5 mic5213-5.0bc5 mic5213-5.0yc5 lab lab 5.0v C40 c to +125 c sc-70-5 other voltages available. contact micrel for details. features ? teeny? sc-70 package ? wide selection of output voltages ? guaranteed 80ma output ? low quiescent current ? low dropout voltage ? tight load and line regulation ? low temperature coefficient ? current and thermal limiting ? reversed input polarity protection ? zero off-mode current ? logic-controlled shutdown ? stability with low esr ceramic capacitors applications? cellular telephones ? laptop, notebook, and palmtop computers ? battery-powered equipment ? bar code scanners ? smps post-regulator/dc-to-dc modules ? high-efficiency linear power supplies mic5213 teeny? sc-70 cap low-dropout regulator final information teeny is a trademark of micrel, inc. micrel, inc. ? 1849 fortune drive ? san jose, ca 95131 ? usa ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000? http://www.micrel.com downloaded from: http:///
mic5213 2 august 2004 mic5213 micrel absolute maximum ratings (note 1) input supply voltage (v in ) ............................ C 20v to +20v enable input voltage (v en ) ........................... C 20v to +20v power dissipation (p d ) ............................ internally limited storage temperature range (t s ) ............ C60 c to +150 c lead temperature (soldering, 5 sec.) ...................... 260 c esd, note 3 operating ratings (note 2) input voltage (v in ) ........................................... 2.5v to 16v enable input voltage (v en ) .................................. 0v to v in junction temperature range ................... C40 c to +125 c thermal resistance ( ja )......................................... note 4 pin configuration en in out gnd lax 1 345 2 nc sc-70-5 (c5) pin description pin number pin name pin function 1 en enable (input): ttl/cmos compatible control input. logic high = enabled; logic low or open = shutdown. 2 nc not internally connected. 3 gnd ground 4 out regulator output 5 in supply input downloaded from: http:///
august 2004 3 mic5213 mic5213 micrel electrical characteristics v in = v out + 1v; i l = 1ma; c l = 0.47 f; v en 2.0v; t j = 25 c, bold values indicate C40 c t j +125 c; unless noted. symbol parameter conditions min typ max units v o output voltage accuracy C 33 % C 44 % ? v o / ? t output voltage temp. coefficient note 5 50 200 ppm/ c ? v o /v o line regulation v in = v out + 1v to 16v 0.008 0.3 % 0.5 % ? v o /v o load regulation i l = 0.1ma to 80ma, note 6 0.08 0.3 % 0.5 % v in Cv o dropout voltage, note 7 i l = 100 a2 0 m v i l = 20ma 200 350 mv i l = 50ma 250 mv i l = 80ma 280 600 mv i q quiescent current v en 0.4v (shutdown) 0.01 10 a i gnd ground pin current, note 8 i l = 100 a, v en 2.0v (active) 180 a i l = 20ma, v en 2.0v (active) 225 750 a i l = 50ma, v en 2.0v (active) 850 a i l = 80ma, v en 2.0v (active) 1800 3000 a i gnddo ground pin current in dropout v in = v out(nominal) C 0.5v, note 8 200 300 a i limit current limit v out = 0v 180 250 ma ? v o/ ? p d thermal regulation note 9 0.05 %/w enable input v il enable input voltage level logic low (off) 0.6 v v ih logic high (on) 2.0 v i il enable input current v il 0.6v 0.01 1 a i ih v ih 2.0v 8 50 a note 1. exceeding the absolute maximum rating may damage the device. note 2. the device is not guaranteed to function outside its operating rating. note 3. devices are esd sensitive. handling precautions recommended. note 4. the maximum allowable power dissipation is a function of the maximum junction temperature, t j(max) , the junction-to-ambient thermal resistance, ja , and the ambient temperature, t a . the maximum allowable power dissipation at any ambient temperature is calculated using: p d(max) = (t j(max) C t a ) ja . exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. ja of the sc-70-5 is 450 c/w, mounted on a pc board. note 5. output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. note 6. regulation is measured at constant junction temperature using low duty cycle pulse testing. changes in output voltage due to heating effects are covered by the thermal regulation specification. note 7. 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. note 8. ground pin current is the regulator quiescent current plus pass transistor base current. the total current drawn from the supply is the sum of the load current plus the ground pin current. note 9. thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line regulation effects. specifications are for an 80ma load pulse at v in = 16v for t = 10ms. downloaded from: http:///
mic5213 4 august 2004 mic5213 micrel 1 10 100 1000 0.01 0.1 1 10 100 dropout voltage (mv) output current (ma) dropout voltage vs. output current c in = 10 f c out = 1 f 0 100 200 300 400 -60 -30 0 30 60 90 120 150 dropout voltage (mv) temperature ( c) dropout voltage vs. temperature c in = 10 f c out = 1 f i l = 100 a i l = 1ma i l = 80ma 0 1 2 3 4 01234567 output voltage (v) supply voltage (v) dropout characteristics i l = 80ma i l = 100 a c in = 10 f c out = 1 f 0 500 1000 1500 2000 0 1020304050607080 ground current ( a) output current (ma) ground current vs. output current v in = v out + 1v 0.0 0.5 1.0 1.5 2.0 01234567 ground current (ma) supply voltage (v) ground current vs. supply voltage i l = 50ma i l = 100 a v out = 3.3v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -60 -30 0 30 60 90 120 150 ground current (ma) temperature ( c) ground current vs. temperature i l = 50ma i l = 100 a c in = 10 f c out = 1 f i l = 80ma typical characteristics 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 50 100 150 200 output voltage (v) output current (ma) c in = 10 f c out = 1 f output voltage vs. output current 0 20 40 60 80 100 120 140 160 01234567 short circuit current (ma) input voltage (v) short circuit current vs. input voltage c in = 10 f c out = 1 f -60 -40 -20 0 20 40 60 ? output (mv) -50 0 50 100 -2 0246810121416 load (ma) time (ms) thermal regulation (3.3v version) c l = 1 f 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 -60 -30 0 30 60 90 120 150 output voltage (v) temperature ( c) output voltage vs. temperature c in = 10 f c out = 1 f curves applicable at 100 a and 50ma 3 devices hi / avg / lo 100 120 140 160 180 200 -60 -30 0 30 60 90 120 150 output current (ma) temperature ( c) short circuit current vs. temperature c in = 10 f c out = 1 f 3.3 3.4 3.5 -60 -30 0 30 60 90 120 150 min. supply voltage (v) temperature ( c) minimum supply voltage vs. temperature i l = 1ma v out = 3.3v c in = 10 f c out = 1 f downloaded from: http:///
august 2004 5 mic5213 mic5213 micrel ? output (mv) -50 0 50 100 -1 012345678 output (ma) time (ms) load transient c out = 1 f v in = v out + 1 0 40 -40 -50 0 50 100 -5 0 5 10 15 20 output (ma) time (ms) -200 -100 0 100 ? output (mv) load transient c out = 10 f v in = v out + 1 -2 -1 0 1 2 3 ? output (v) 2 4 6 8 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 input (v) time (ms) line transient c l = 1 f i l = 1ma -1 0 1 2 ? output (v) 2 4 6 8 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 input (v) time (ms) line transient c l = 11 f i l = 1ma 0 20 40 60 80 100 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 ripple voltage (db) frequency (hz) ripple voltage vs. frequency i l = 1ma c l = 1 f v in = v out + 1 0 20 40 60 80 100 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 ripple voltage (db) frequency (hz) ripple voltage vs. frequency i l = 50ma c l = 1 f v in = v out + 1 0 20 40 60 80 100 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 ripple voltage (db) frequency (hz) ripple voltage vs. frequency i l = 100 a c l = 1 f v in = v out + 1 downloaded from: http:///
mic5213 6 august 2004 mic5213 micrel 0.01 0.1 1 10 100 1000 1x10 0 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 output impedance ( ) frequency (hz) output impedance i l = 100 a i l = 1ma i l = 100ma -1 0 1 2 3 4 5 output (v) -2 0 2 4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 enable (v) time (ms) enable characteristics (3.3v version) c l = 1 f i l = 100 a -1.0 0.0 1.0 2.0 3.0 4.0 output (v) -2 0 2 4 -2 0246810 enable (v) time ( s) enable characteristics (3.3v version) c l = 1 f i l = 100 a 0.50 0.75 1.00 1.25 1.50 -60 -30 0 30 60 90 120 150 enable voltage (mv) temperature ( c) enable voltage vs. temperature c in = 10 f c out = 1 f i l = 1ma v on v off 0 10 20 30 40 -60 -30 0 30 60 90 120 150 enable current ( a) temperature ( c) enable current vs. temperature c in = 10 f c out = 1 f i l = 1ma v en = 5v v en = 2v downloaded from: http:///
august 2004 7 mic5213 mic5213 micrel applications informationinput capacitor a 0.1 f capacitor should be placed from in to gnd if there is more than 10 inches of wire between the input and the acfilter capacitor or when a battery is used as the input. output capacitor typical pnp-based regulators require an output capacitor to prevent oscillation. the mic5213 is ultrastable, requiring only 0.47 f of output capacitance for stability. the regulator is stable with all types of capacitors, including the tiny, low-esrceramic chip capacitors. the output capacitor value can be increased without limit to improve transient response. no-load stability the mic5213 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. this is especially important in cmos ram keep-alive applications. enable input the mic5213 features nearly zero off-mode current. when en (enable input) is held below 0.6v, all internal circuitry is powered off. pulling en high (over 2.0v) re-enables the device and allows operation. when en is held low, the regulator typically draws only 10na of current. while the logic threshold is ttl/cmos compatible, en may be pulled as high as 20v, independent of v in . thermal behaviorthe mic5213 is designed to provide 80ma of continuous current in a very small profile package. maximum power dissipation can be calculated based on the output current and the voltage drop across the part. to determine the maximum power dissipation of the package, use the junction-to-ambi- ent thermal resistance of the device and the following basic equation: p tt d(max) j(max) a ja = ? t j(max) is the maximum junction temperature of the die, 125 c, and t a is the maximum ambient temperature. ja is the junction-to-ambient thermal resistance ambient of theregulator. the ja of the mic5213 is 450 c/w. the actual power dissipation of the regulator circuit can bedetermined using one simple equation. p d = (v in C v out ) i out + v in i gnd substituting p d(max) , determined above, for p d and solving for the operating conditions that are critical to the applicationwill give the maximum operating conditions for the regulator circuit. for example, if we are operating the mic5213-3.0bc5 at room temperature, with a minimum footprint layout, we can determine the maximum input voltage for a set output current. p 125 25 450 c / w d(max) = ? p 222mw d(max) = to prevent the device from entering thermal shutdown,maximum power dissipation cannot be exceeded. using the output voltage of 3.0v, and an output current of 80ma, we can determine the maximum input voltage. ground current, maxi- mum of 3ma for 80ma of output current, can be taken from the electrical characteristics section of the data sheet. 222mw = (v in C 3.0v) 80ma + v in 3ma 222mw = (80ma v in + 3ma v in ) C 240mw 462mw = 83ma v in v in = 5.57v max. therefore, a 3.0v application at 80ma of output current canaccept a maximum input voltage of 5.6v in an sc-70-5 package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to regulator thermals section of micrel s designing with low-dropout voltage regu- lators handbook. fixed voltage regulatorthe mic5213 is ideal for general-purpose voltage regulation in any handheld device. applications that are tight for space can easily use the teeny ? sc-70 regulator which occupies half the space of a sot-23-5 regulator. the mic5203 offersa smaller system solution, only requiring a small multilayer ceramic capacitor for stability. mic5213-x.x in out gnd 0.47f v out 3.0v 3.6v li-ion cell en figure 1. single-cell regulator downloaded from: http:///
mic5213 8 august 2004 mic5213 micrel package information 0.30 (0.012)0.10 (0.004) 2.20 (0.087)1.80 (0.071) 2.40 (0.094)1.80 (0.071) 1.35 (0.053)1.15 (0.045) 0.65 (0.0256) bsc 1.00 (0.039)0.80 (0.032) 0.10 (0.004)0.00 (0.000) dimensions: mm (inch) 0.30 (0.012)0.15 (0.006) 0.18 (0.007)0.10 (0.004) 1.10 (0.043)0.80 (0.032) sc-70-5 (c5) micrel, inc. 1849 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 web http://www.micrel.com this information is believed to be accurate and reliable, however no responsibility is assumed by micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. no license is granted by implication or otherwise under any patent or patent right of micrel, inc. ? 2004 micrel, incorporated downloaded from: http:///
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