december 1998 1 MIC5203 MIC5203 micrel general description the MIC5203 is a cap 80ma linear voltage regulator with very low dropout voltage (typically 20mv at light loads and 300mv at 80ma) and very low ground current (225 a at 20ma output), offering better than 3% initial accuracy with a logic-compatible enable input. the cap regulator design is optimized to work with low- value, low-cost ceramic capacitors. the outputs typically require only 0.47 f of output capacitance for stability. designed especially for hand-held, battery-powered devices, the MIC5203 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 MIC5203 increases only slightly in dropout, further prolonging battery life. key MIC5203 features include current limiting, overtemperature shutdown, and protection against reversed battery. the MIC5203 is available in 2.8v, 3.0v, 3.3v, 3.6v, 3.8v, 4.0v, 4.5v, 4.75v, and 5.0v fixed voltages. other voltages are available; contact micrel for details. typical applications enable shutdown laxx v out 0.47f sot-143 version 15 2 34 0.47f v out enable shutdown lkxx sot-23-5 version ordering information part number marking voltage junction temp. range package MIC5203-3.0bm4 la30 3.0v C40 c to +125 c sot-143 MIC5203-3.3bm4 la33 3.3v C40 c to +125 c sot-143 MIC5203-3.6bm4 la36 3.6v C40 c to +125 c sot-143 MIC5203-3.8bm4 la38 3.8v C40 c to +125 c sot-143 MIC5203-4.0bm4 la40 4.0v C40 c to +125 c sot-143 MIC5203-4.5bm4 la45 4.5v C40 c to +125 c sot-143 MIC5203-4.7bm4 la47 4.75v C40 c to +125 c sot-143 MIC5203-5.0bm4 la50 5.0v C40 c to +125 c sot-143 MIC5203-2.8bm5 la28 2.8v C40 c to +125 c sot-23-5 MIC5203-3.0bm5 lk30 3.0v C40 c to +125 c sot-23-5 MIC5203-3.3bm5 lk33 3.3v C40 c to +125 c sot-23-5 MIC5203-3.6bm5 lk36 3.6v C40 c to +125 c sot-23-5 MIC5203-3.8bm5 lk38 3.8v C40 c to +125 c sot-23-5 MIC5203-4.0bm5 lk40 4.0v C40 c to +125 c sot-23-5 MIC5203-4.5bm5 lk45 4.5v C40 c to +125 c sot-23-5 MIC5203-4.7bm5 lk47 4.75v C40 c to +125 c sot-23-5 MIC5203-5.0bm5 lk50 5.0v C40 c to +125 c sot-23-5 other voltages available. contact micrel for details. features ? tiny 4-lead and 5-lead surface-mount packages ? 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 MIC5203 cap 80ma low-dropout regulator final information 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
MIC5203 2 december 1998 MIC5203 micrel absolute maximum ratings (note 1) input supply voltage (v in ) ............................ C20v to +20v enable input voltage (v en ) ........................... C20v 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 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 3 pin configuration gnd out in en laxx part identification 1 2 34 sot-143 (m4) in out nc en lkxx 1 3 45 2 gnd sot-23-5 (m5) pin description pin number pin number pin name pin function sot-143 sot-23-5 1 2 gnd ground 2 3 en enable (input): ttl/cmos compatible control input. logic high = enabled; logic low or open = shutdown. 3 1 in supply input 4 nc not internally connected. 4 5 out regulator output
december 1998 3 MIC5203 MIC5203 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 C 40 c t j +125 c; unless noted. symbol parameter conditions min typ max units v o output voltage accuracy C 33% 44 % ? v o / ? t output voltage temp. coefficient note 4 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 5 0.08 0.3 % 0.5 % v in C v o dropout voltage, note 6 i l = 100 a20mv i l = 20ma 200 350 mv i l = 50ma 250 mv i l = 80ma 300 600 mv i q quiescent current v en 0.4v (shutdown) 0.01 10 a i gnd ground pin current, note 7 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 at dropout v in = v out(nominal) C 0.5v, note 7 200 300 a i limit current limit v out = 0v 180 250 ma ? v o/ ? p d thermal regulation note 8 0.05 %/w enable input v il enable input voltage level logic low (off) 0.6 a v ih logic high (on) 2.0 a i il enable input current v il 0.6v 0.01 1 a i ih v ih 2.0v 15 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: the maximum allowable power dissipation at any t a (ambient temperature) is 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. the ja is 250 c/w for the sot-143 and 220 c/w for the sot-23-5 mounted on a printed circuit board. note 4: output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. note 5: 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 150ma. changes in output voltage due to heating effects are covered by the thermal regulation specificatio n. note 6: dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value mea sured at 1v differential. note 7: 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 8: 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 a 150ma load pulse at v in = 16v for t = 10ms.
MIC5203 4 december 1998 MIC5203 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
december 1998 5 MIC5203 MIC5203 micrel -400 -200 0 200 ? output (mv) 0 200 -1 012345678 output (ma) time (ms) load transient c out = 0.47 f v in = v out + 1 -400 -200 0 200 ? output (mv) -50 0 50 100 -1 012345678 output (ma) time (ms) load transient c out = 1 f v in = v out + 1 -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 awaiting further characterization data -2 -1 0 1 2 3 ? output (v) -2 -1 0 1 2 3 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 input (v) time (ms) line transient c l = 0.47 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 = 100 a c l = 0.47 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 = 1ma c l = 0.47 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 = 0.47 f v in = v out + 1 awaiting further characterization data awaiting further characterization data awaiting further characterization data awaiting further characterization data
MIC5203 6 december 1998 MIC5203 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 -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 = 0.47 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 = 0.47 f i l = 100 a awaiting further characterization data awaiting further characterization data
december 1998 7 MIC5203 MIC5203 micrel applications information input 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 ac filter capacitor or when a battery is used as the input. output capacitor typical pnp based regulators require an output capacitor to prevent oscillation. the MIC5203 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-esr ceramic chip capacitors. the output capacitor value can be increased without limit to improve transient response. the capacitor should have a resonant frequency above 500khz. ceramic capacitors work, but some dielectrics have poor temperature coefficients, which will affect the value of the output capacitor over temperature. tantalum capacitors are much more stable over temperature, but typically are larger and more expensive. aluminum electrolytic capacitors will also work, but they have electrolytes that freeze at about C 30c . tantalum or ceramic capacitors are recommended for operation below C 25c . no-load stability the MIC5203 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 MIC5203 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. en draws a small amount of current, typically 15 a. while the logic threshold is ttl/ cmos compatible, en may be pulled as high as 20v, independent of v in .
MIC5203 8 december 1998 MIC5203 micrel package information 0.20 (0.008) 0.09 (0.004) 0.60 (0.024) 0.10 (0.004) 3.02 (0.119) 2.80 (0.110) 10 0 3.00 (0.118) 2.60 (0.102) 1.75 (0.069) 1.50 (0.059) 0.95 (0.037) ref 1.30 (0.051) 0.90 (0.035) 0.15 (0.006) 0.00 (0.000) dimensions: mm (inch) 0.50 (0.020) 0.35 (0.014) 1.90 (0.075) ref sot-23-5 (m5) 0.150 (0.0059) 0.089 (0.0035) 8 0 0.400 (0.016) typ 3 places 2.50 (0.098) 2.10 (0.083) 1.40 (0.055) 1.20 (0.047) 0.950 (0.0374) typ 3.05 (0.120) 2.67 (0.105) 0.800 (0.031) typ 1.12 (0.044) 0.81 (0.032) 0.10 (0.004) 0.013 (0.0005) dimensions: mm (inch) 0.41 (0.016) 0.13 (0.005) c l c l sot-143 (m4) 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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