mic5202 micrel march 2006 1 mic5202 mic5202 dual 100ma low-dropout regulator typical application pin con? guration 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 coef? cient ? 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 ef? ciency 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 un- needed. 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 ? xed 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. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.mic rel.com ordering information part number volts accuracy temperature range package standard pb-free mic5202-3.0bm mic5202-3.0ym 3.0 1% C40c to +125c so-8 mic5202-3.3bm mic5202-3.3ym 3.3 1% C40c to +125c so-8 mic5202-4.8bm mic5202-4.8ym 4.85 1% C40c to +125c so-8 mic5202-5.0bm mic5202-5.0ym 5.0 1% C40c to +125c so-8
mic5202 micrel mic5202 2 march 2006 electrical characteristics limits in standard typeface are for t j = 25c and limits in boldface apply over the junction temperature range of C40c to +125c. speci- ? cations are for each half of the (dual) mic5202. unless otherwise speci? ed, v in = v out + 1v, i l = 1ma, c l = 10f, and v control 2.0v. symbol parameter condition min typ max units v o output voltage variation from speci? ed v out C1 1 % accuracy C2 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 = 100a 17 mv (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 = 100a 170 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 speci? ed v out , i l = 100a 270 330 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 speci? cations do not apply when operating the device beyond its speci? ed operating ratings. power dissipation ................................................ internally limited lead temperature (soldering, 5 seconds) ............................260c operating junction temperature range .............. C40c to +125c input supply voltage .................................................C20v to +60v enable input voltage ..............................................C20v to +60v so-8 ja ........................................................................see note 1 recommended operating conditions input voltage ................................................................2.5v to 26v operating junction temperature range .............. C40c to +125c enable input voltage ......................................................0v to v in
mic5202 micrel march 2006 3 mic5202 note 1: absolute maximum ratings indicate limits beyond which damage to the component may occur. electrical speci? cations 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 tem- perature, 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 160c/w mounted on a pc board. note 2: output voltage temperature coef? cient is de? ned 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 regula- tion in the load range from 0.1ma to 100ma. changes in output voltage due to heating effects are covered by the thermal regulation speci? cation. note 4: dropout voltage is de? ned 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 supply is the sum of the load current plus the ground pin current. note 6: thermal regulation is de? ned as the change in output voltage at a time t after a change in power dissipation is applied, ex- cluding load or line regulation effects. speci? cations are for a 100ma load pulse at v in = 26v for t = 10ms, and is measured 0 50 100 150 200 250 0.01 0.1 1 10 100 1000 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 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 input voltage (v) dropout characteristics i l = 100ma i l = 100a, 1ma 0.1 1 10 0.01 0.1 1 10 100 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 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 current (a) output voltage vs. output current c in = 2.2f c out = 4.7f typical characteristics (each regulator2 regulators/package)
mic5202 micrel mic5202 4 march 2006 0.15 0.20 0.25 0.30 -60 -30 0 30 60 90 120 150 temperature (c) ground current vs. temperature i load = 100a c in = 2.2f c out = 4.7f 1.0 1.1 1.2 1.3 1.4 1.5 -50 0 50 100 150 temperature (c) ground current vs. temperature i load = 100ma c in = 2.2f c out = 4.7f -100 0 100 200 -5 0 5 10 15 20 25 30 35 time (ms) thermal regulation (3.3v version) -50 0 50 100 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 temperature (c) output voltage vs. temp. (3.3v version) c in = 2.2f c out = 4.7f 3 devices: hi / avg / lo curves applicable at 100a and 100ma 100 120 140 160 180 200 220 240 260 280 300 -60 -30 0 30 60 90 120 150 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 temperature (c) minimum input voltage vs. temperature c in = 2.2f c out = 4.7f i load = 1ma 0 50 100 150 200 250 300 1234567 input voltage (v) short circuit current vs. input voltage c in = 2.2f c out = 4.7f v out = 3.3v -30 -20 -10 0 10 20 0 100 200 300 -2 0246810 time (ms) load transient c l = 4.7f 0 100 200 300 -10 0 10203040 time (ms) load transient -30 -20 -10 0 10 20 c l = 47f 0 20 40 60 80 100 120 012345678910 supply voltage (v) supply current vs. supply voltage (3.3v version) r l = 33? -10 -5 0 5 10 2 4 6 8 -0.2 0 0.2 0.4 0.6 0.8 time (ms) line transient c l = 1 f i l = 1ma -5 0 5 10 15 2 4 6 8 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 time (ms) line transient c l = 10 f i l = 1ma
mic5202 micrel march 2006 5 mic5202 0 10 20 30 40 50 60 01234567 supply voltage (v) supply current vs. supply voltage (3.3v version) r l = 66? -1 0 1 2 3 4 5 -2 0 2 4 -50 0 50 100 150 200 250 300 time (s) enable transient (3.3v version) c l = 4.7 f i l = 1ma -1 0 1 2 3 4 5 -2 0 2 4 -50 0 50 100 150 200 250 300 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 frequency (hz) output impedance i l = 100a i l = 1ma i l = 100ma -5 0 5 10 15 20 25 30 35 -60 -30 0 30 60 90 120 150 temperature (c) enable current threshold vs. temperature c in = 2.2f c out = 4.7f 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 temperature (c) enable voltage threshold vs. temperature c in = 2.2f c out = 4.7f off on 0 20 40 60 80 100 frequency (hz) ripple vs. frequency i l = 100a 0 20 40 60 80 100 frequency (hz) ripple vs. frequency i l = 1ma 0 20 40 60 80 100 frequency (hz) ripple vs. frequency i l = 100ma
mic5202 micrel mic5202 6 march 2006 thermal considerations applications information external capacitors a 1f capacitor is recommended between the mic5202 output and ground to prevent oscillations due to instability. larger val- ues serve to improve the regulators transient response. most types of tantalum or aluminum electrolytics will be adequate; ? lm types will work, but are costly and therefore not recom- mended. many aluminum electrolytics have electrolytes that freeze at about C30c, so solid tantalums are recommended for operation below C25c. 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 0.47f for current below 10ma or 0.33f for currents below 1 ma. a 1f capacitor should be placed from the mic5202 input to ground if there is more than 10 inches of wire be- tween the input and the ac ? lter 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 15a. 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 160c/w ceramic 120c/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 160c/w assumes no ground plane, minimum trace widths, and a fr4 material board. part ii. nominal power dissipation and die tempera- ture the mic5202-xxbm at a 25c ambient temperature will oper- ate reliably at up to 625mw power dissipation when mounted in the worst case manner described above. at an ambient temperature of 55c, the device may safely dissipate 440mw. these power levels are equivalent to a die temperature of 125c, 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 march 2006 7 mic5202 package information 8-pin sop (m) 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 this information furnished by micrel in this data sheet is believed to be accurate and reliable. however no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and speci? cations at any time without noti? cation to the customer. micrel products are not designed or authorized 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 support devices or systems are devices or systems that (a) are intend ed 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 signi? cant inj ury to the user. a purchaser's use or sale of micrel products for use in life support appliances, devices or systems is a purchaser's own risk and purchaser a grees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel incorporated
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