MIC5202 micrel july 1998 1 MIC5202 MIC5202 dual 100ma low-dropout regulator final information typical application ordering information part number volts accuracy temperature range* package MIC5202-3.0bm 3.0 1% C40 c to +125 c so-8 MIC5202-3.3bm 3.3 1% C40 c to +125 c so-8 MIC5202-4.8bm 4.85 1% C40 c to +125 c so-8 MIC5202-5.0bm 5.0 1% C40 c to +125 c so-8 pin configuration other voltages are available; contact micrel for details. features ? high output voltage accuracy ? variety of output voltages ? guaranteed 100ma output ? low quiescent current ? low dropout voltage ? extremely tight load and line regulation ? very low temperature coefficient ? current and thermal limiting ? reverse-battery protection ? zero off mode current ? logic-controlled electronic shutdown ? available in so-8 package applications ? cellular telephones ? laptop, notebook, and palmtop computers ? battery powered equipment ? pcmcia v cc and v pp regulation/switching ? bar code scanners ? smps post-regulator/ dc to dc modules ? high efficiency linear power supplies general description the MIC5202 is a family of dual linear voltage regulators with very low dropout voltage (typically 17mv at light loads and 210mv at 100ma), and very low ground current (1ma at 100ma outputCeach section), offering better than 1% initial accuracy with a logic compatible on/off switching input. designed especially for hand-held battery powered devices, the MIC5202 is switched by a cmos or ttl compatible logic signal. this enable control my be tied directly to v in if unneeded. when disabled, power consumption drops nearly to zero. the ground current of the MIC5202 increases only slightly in dropout, further prolonging battery life. key MIC5202 features include protection against reversed battery, current limiting, and over-temperature shutdown. the MIC5202 is available in several fixed voltages. other options are available; contact micrel for details. MIC5202-3.3 enable b output a output b enable a both ground pins must be tied to the same potential. v in (a) and v in (b) may run from separate supplies. * junction temperature 1 (x2) enable pins may be tied directly to v in ground v out (a) v in (a) enable (b) MIC5202-xxbm v out (b) enable (a) v in (b) ground micrel, inc. ?1849 fortune drive ?san jose, ca 95131 ?usa ?tel + 1 (408) 944-0800 ?fax + 1 (408) 944-0970 ?http://www.mic rel.com
MIC5202 micrel MIC5202 2 july 1998 electrical characteristics limits in standard typeface are for t j = 25 c and limits in boldface apply over the junction temperature range of C 40 c to +125 c. specifications are for each half of the (dual) MIC5202. unless otherwise specified, v in = v out + 1v, i l = 1ma, c l = 10 f, and v control 2.0v. symbol parameter condition min typ max units v o output voltage variation from specified v out C 11% accuracy ? 2 ? v o output voltage (note 2) 40 150 ppm/ c ? t temperature coef. ? v o line regulation v in = v out + 1 v to 26v 0.004 0.10 % v o 0.40 ? v o load regulation i l = 0.1ma to 100ma (note 3) 0.04 0.16 % v o 0.30 v in C v o dropout voltage i l = 100 a17mv (note 4) i l = 20ma 130 i l = 30ma 150 i l = 50ma 180 i l = 100ma 225 350 i q quiescent current v control 0.7v (shutdown) 0.01 a i gnd ground pin current v control 2.0v, i l = 100 a170 a i l = 20ma 270 i l = 30ma 330 i l = 50ma 500 i l = 100ma 1200 1500 psrr ripple rejection 75 db i gnddo ground pin v in = 0.5v less specified v out , i l = 100 a270 330 a current at dropout (note 5) i limit current limit v out = 0v 280 ma ? v o thermal regulation (note 6) 0.05 %/w ? p d e n output noise 100 v control input input voltage level v il logic low off 0.7 v logic high on 2.0 i il control input current v il 0.7v 0.01 a ih v ih 2.0v 8 50 absolute maximum ratings absolute maximum ratings indicate limits beyond which damage to the device may occur. electrical specifications do not apply when operating the device beyond its specified operating ratings. power dissipation ............................................... internally limited lead temperature (soldering, 5 seconds) .......................... 260 c operating junction temperature range ............. C 40 c to +125 c input supply voltage ................................................ C 20v to +60v enable input voltage ............................................. C 20v to +60v so-8 ja ....................................................................... see note 1 recommended operating conditions input voltage ............................................................... 2.5v to 26v operating junction temperature range ............. C 40 c to +125 c enable input voltage ..................................................... 0v to v in
MIC5202 micrel july 1998 3 MIC5202 note 1: absolute maximum ratings indicate limits beyond which damage to the component may occur. electrical specifications do not apply when operating the device outside of its rated operating conditions. 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 (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. the junction to ambient thermal resistance of the MIC5202bm is 160 c/w mounted on a pc board. note 2: output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. note 3: regulation is measured at constant junction temperature using low duty cycle pulse testing. parts are tested for load regulati on in the load range from 0.1ma to 100ma. changes in output voltage due to heating effects are covered by the thermal regulation specification. note 4: 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 5: ground pin current is the regulator quiescent current plus pass transistor base current. the total current drawn from the supp ly is the sum of the load current plus the ground pin current. note 6: thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, exclu ding load or line regulation effects. specifications are for a 100ma load pulse at v in = 26v for t = 10ms, and is measured separately for each section. 0 50 100 150 200 250 0.01 0.1 1 10 100 1000 dropout voltage (mv) output current (ma) dropout voltage vs. output current 0.0 0.1 0.2 0.3 0.4 -60 -30 0 30 60 90 120 150 dropout voltage (v) temperature ( c) dropout voltage vs. temperature i l = 100ma i l = 1ma 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0246810 output voltage (v) input voltage (v) dropout characteristics i l = 100ma i l = 100 a, 1ma 0.1 1 10 0.01 0.1 1 10 100 ground current (ma) output current (ma) ground current vs. output current 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0246810 ground current (ma) supply voltage (v) ground current vs. supply voltage i l = 100ma i l = 1ma 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0.0 0.1 0.2 0.3 output voltage (v) output current (a) output voltage vs. output current c in = 2.2 f c out = 4.7 f typical characteristics (each regulator 2 regulators/package)
MIC5202 micrel MIC5202 4 july 1998 0.15 0.20 0.25 0.30 -60 -30 0 30 60 90 120 150 ground current (ma) temperature ( c) ground current vs. temperature i load = 100 a c in = 2.2 f c out = 4.7 f 1.0 1.1 1.2 1.3 1.4 1.5 -50 0 50 100 150 ground current (ma) temperature ( c) ground current vs. temperature i load = 100ma c in = 2.2 f c out = 4.7 f -100 0 100 200 -5 0 5 10 15 20 25 30 35 load (ma) time (ms) thermal regulation (3.3v version) -50 0 50 100 ? output (mv) c l = 4.7 f 3.0 3.1 3.2 3.3 3.4 3.5 3.6 -60 -30 0 30 60 90 120 150 output voltage (v) temperature ( c) output voltage vs. temp. (3.3v version) c in = 2.2 f c out = 4.7 f 3 devices: hi / avg / lo curves applicable at 100 a and 100ma 100 120 140 160 180 200 220 240 260 280 300 -60 -30 0 30 60 90 120 150 output current (ma) temperature ( c) output current vs. temperature v out = 0v (short circuit) v out = 3.3v 3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 3.30 -60 -30 0 30 60 90 120 150 min. input voltage (v) temperature ( c) minimum input voltage vs. temperature c in = 2.2 f c out = 4.7 f i load = 1ma 0 50 100 150 200 250 300 1234567 short circuit current (ma) input voltage (v) short circuit current vs. input voltage c in = 2.2 f c out = 4.7 f v out = 3.3v -30 -20 -10 0 10 20 ? output (mv) 0 100 200 300 -2 0246810 output (ma) time (ms) load transient c l = 4.7 f 0 100 200 300 -10 0 10203040 output (ma) time (ms) load transient -30 -20 -10 0 10 20 ? output (mv) c l = 47 f 0 20 40 60 80 100 120 012345678910 supply current (ma) supply voltage (v) supply current vs. supply voltage (3.3v version) r l = 33 ? -10 -5 0 5 10 ? output (mv) 2 4 6 8 -0.2 0 0.2 0.4 0.6 0.8 input (v) time (ms) line transient c l = 1 f i l = 1ma -5 0 5 10 15 ? output (mv) 2 4 6 8 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 input (v) time (ms) line transient c l = 10 f i l = 1ma
MIC5202 micrel july 1998 5 MIC5202 0 10 20 30 40 50 60 01234567 supply current (ma) supply voltage (v) supply current vs. supply voltage (3.3v version) r l = 66 ? -1 0 1 2 3 4 5 output (v) -2 0 2 4 -50 0 50 100 150 200 250 300 enable (v) time ( s) enable transient (3.3v version) c l = 4.7 f i l = 1ma -1 0 1 2 3 4 5 output (v) -2 0 2 4 -50 0 50 100 150 200 250 300 enable (v) time ( s) enable transient (3.3v version) c l = 4.7 f i l = 100ma 0.001 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 -5 0 5 10 15 20 25 30 35 -60 -30 0 30 60 90 120 150 enable current ( a) temperature ( c) enable current threshold vs. temperature c in = 2.2 f c out = 4.7 f v en = 2v v en = 5v 0.4 0.6 0.8 1 1.2 1.4 1.6 -60 -30 0 30 60 90 120 150 enable voltage (v) temperature ( c) enable voltage threshold vs. temperature c in = 2.2 f c out = 4.7 f off on 0 20 40 60 80 100 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 ripple voltage (db) frequency (hz) ripple vs. frequency i l = 100 a 0 20 40 60 80 100 10x10 0 100x10 0 1x10 3 10x10 3 100x10 3 1x10 6 ripple voltage (db) frequency (hz) ripple vs. frequency 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 vs. frequency i l = 100ma
MIC5202 micrel MIC5202 6 july 1998 thermal considerations applications information external capacitors a 1 f capacitor is recommended between the MIC5202 output and ground to prevent oscillations due to instability. larger values serve to improve the regulator's transient response. most types of tantalum or aluminum electrolytics will be adequate; film types will work, but are costly and therefore not recommended. many aluminum electrolytics have electrolytes that freeze at about C 30 c, so solid tantalums are recommended for operation below C 25 c. the important parameters of the capacitor are an effective series resistance of about 5 ? or less and a resonant frequency above 500khz. the value of this capacitor may be increased without limit. at lower values of output current, less output capacitance is required for output stability. the capacitor can be reduced to 0.47 f for current below 10ma or 0.33 f for currents below 1 ma. a 1 f capacitor should be placed from the MIC5202 input to ground if there is more than 10 inches of wire between the input and the ac filter capacitor or if a battery is used as the supply. enable input the MIC5202 features nearly zero off mode current. when the enable input is held below 0.7v, all internal circuitry is powered off. pulling this pin high (over 2.0v) re-enables the device and allows operation. the enable pin requires a small amount of current, typically 15 a. while the logic threshold is ttl/cmos compatible, enable may be pulled as high as 30v, independent of the voltage on v in . the two portions of the MIC5202 may be enabled separately. general notes the MIC5202 will remain stable and in regulation with no load in addition to the internal voltage divider, unlike many other voltage regulators. this is especially important in cmos ram keep-alive applications. thermal shutdown is independant on both halfs of the dual MIC5202, however an over-temperature condition on one half might affect the other because of proximity. when used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. both MIC5202 ground pins must be tied to the same ground potential. isolation between the two halfs allows connecting the two v in pins to different supplies. pc board ja dielectric fr4 160 c/w ceramic 120 c/w multi-layer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. the "worst case" value of 160 c/w assumes no ground plane, minimum trace widths, and a fr4 material board. part ii. nominal power dissipation and die temperature the MIC5202-xxbm at a 25 c ambient temperature will operate reliably at up to 625mw power dissipation when mounted in the "worst case" manner described above. at an ambient temperature of 55 c, the device may safely dissipate 440mw. these power levels are equivalent to a die tempera- ture of 125 c, the recommended maximum temperature for non-military grade silicon integrated circuits. part i. layout the MIC5202-xxbm (8-pin surface mount package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board. 245 mil 30 mil 50 mil 50 mil 150 mil minimum recommended board pad size, so-8.
MIC5202 micrel july 1998 7 MIC5202 package information 45 0 C 8 0.244 (6.20) 0.228 (5.79) 0.197 (5.0) 0.189 (4.8) seating plane 0.026 (0.65) max ) 0.010 (0.25) 0.007 (0.18) 0.064 (1.63) 0.045 (1.14) 0.0098 (0.249) 0.0040 (0.102) 0.020 (0.51) 0.013 (0.33) 0.157 (3.99) 0.150 (3.81) 0.050 (1.27) typ pin 1 dimensions: inches (mm) 0.050 (1.27) 0.016 (0.40) 8-pin sop (m)
MIC5202 micrel MIC5202 8 july 1998 micrel inc. 1849 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 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 an y 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 pat ent right of micrel inc. ? 1998 micrel incorporated
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