mic5232 10ma ultra-low quiescent current cap ldo mlf and micro leadframe are registered trademarks of amkor technology, inc. 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 november 2006 1 m9999-112006-b general description the mic5232 is an ultra-low quiescent current, low- dropout linear regulator that is capable of operating from a single-cell lithium ion battery. consuming only 1.8 a of quiescent current while operating, the mic5232 is ideal for stand-by applications like powering real-time clocks or memory in battery operated electronics. the mic5232 is capable of providing 10ma of output current and has low output noise, providing a small, efficient solution ideal for any keep-alive application. including reverse current protection, keeping reverse leakage (v out > v in ) down to 20na. the mic5232 is a cap design, operating with very small ceramic output capacito rs for stabilit y, reducing required board space and component cost. the mic5232 is available in fixed output voltages in the miniature 6-pin 2mm x 2mm mlf ? package and thin sot-23-5 package with an operating junction temperature range of -40c to 125c. features ? input voltage range: 2.7v to 7.0v ? ultra-low iq: only 1.8 a operating current ? stable with 0.47f ceramic output capacitor ? low dropout voltage of 100mv @ 10ma ? reverse battery protection ? high output accuracy: ? + 2.0% initial accuracy ? + 3.0% over temperature ? logic-level enable input ? miniature 6-pin 2mm x 2mm mlf ? package ? lead-free thin sot-23-5 package ? tight load and line regulation applications ? real-time clock power supply ? stand-by power supply ? sram memory back-up supply ? cellular telephones and notebook computers typical application vin vout en gnd mic5232-1.2yd5 v out v in 3.6v 1.2v 0.47f ceramic 1f 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 input voltage (v) ground pin current vs. input voltage v out = 1.2v i out = 100a c out = 0.47f 1.5 real-time clock back-up supply
micrel, inc. mic5232 november 2006 2 m9999-112006-b block diagram ordering information part number voltage (1) junction temperature range package lead finish mic5232-1.2yd5 1.2v ?40c to +125c tsot-23-5 pb-free mic5232-3.3yd5 3.3v ?40c to +125c tsot-23-5 pb-free mic5232-1.2yml 1.2v ?40c to +125c 6-pin 2mm x 2mm mlf ? pb-free mic5232-3.3yml 3.3v ?40c to +125c 6-pin 2mm x 2mm mlf ? pb-free note: 1. other voltages available. contact micrel inc. for more details.
micrel, inc. mic5232 november 2006 3 m9999-112006-b pin configuration en gnd vin nc nc vout 6 5 4 1 2 3 mic5232-x.xyml 2mm x 2mm mlf? (ml) en gnd nc vout vin 3 1 5 2 4 mic5232-x.xyd5 tsot-23-5 (d5) ep pin description pin number tsot-23-5 pin number mlf pin name pin name 1 3 vin supply input. 2 2 gnd ground. 3 1 en enable input. active high. high = on, low = off. do not leave floating. 4 5 nc not internally connected. 5 4 vout output (10ma output current). - 6 nc not internally connected. - ep ep exposed pad connected-to-ground.
micrel, inc. mic5232 november 2006 4 m9999-112006-b absolute maximum ratings (1) supply input voltage (v in ) ................................0v to 8v enable input voltage (v en )...............................0v to 8v power dissipation (p d ) .................... internally limited (3) junction temperature (t j ).................. ?40c to +125c storage temperature (t s ) .................. ?65c to +150c lead temperature (solde ring, 5 se c.) ................. 260c esd rating (4) ......................................................... 2kv operating ratings (2) supply voltage (v in ) ...................................... 2.7v to 7v enable input voltage (v en ) ...............................0v to v in thermal resistance tsot-23-5 ( ja )......................................... 235 c/w mlf-6 ( ja ) .................................................. 90c/w electrical characteristics (5) v in = v out + 1.0v, c out = 0.47f, i out = 100a, t j = 25c, bold values indicate ?40c to +125c, unless noted. parameter conditions min typ max units variation from nominal v out -2.0 +2.0 % output voltage accuracy variation from nominal v out ; -40c to +125c -3.0 +3.0 % output voltage temp. coefficient 40 ppm/c line regulation v in = v out +1v to7v; 0.02 0.25 %/v load regulation i out = 10a to 10ma 0.2 1.0 1.5 % % dropout voltage (6) i out = 100a i out = 10ma 60 100 300 mv mv ground pin current i out = 10a 1.8 3 a ground pin current in shutdown v en < 0.18v 0.1 1.5 a current limit v out = 0v 70 120 ma reverse current (v out > v in ) v out = v in + 1v 0.02 1 a ripple rejection f = 10hz f = 1khz 55 35 db db output voltage noise c out =0.47f; 10hz to 100khz 400 vrms enable input logic low (regulator shutdown) 0.18 v enable input voltage logic high (regulator enabled) 1.4 v vil < 0.18v (regulator shutdown) 1 na enable input current vih > 1.4v (regulator enabled) 1 na turn-on time c out = 0.47f (7) 0.75 1.5 ms 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) ? t a ) / ja . exceeding the maximum allowable power dissipation will result in excessive die temperature. 4. devices are esd sensitive. handling precautions recommended. 5. specification for packaged product only. 6. dropout voltage is defined as the input-to-output different ial at which the output voltage drops 2% below its nominal v out . for outputs below 2.7v, dropout voltage is the input-to-output differential with the minimum input voltage 2.7v. 7. turn-on time is measured from 10% of the positive edge of the enable signal to 90% of the rising edge of the output voltage of the regulator.
micrel, inc. mic5232 november 2006 5 m9999-112006-b typical characteristics 0 10 20 30 40 50 60 70 80 0.01 0.1 1 10 100 1000 db frequency (khz) power supply rejection ratio v out = 3.3v v in = v out + 1v i out = 100a c out = 0.47f 0 20 40 60 80 100 120 012345678910 dropout voltage (mv) output current (ma) dropout voltage vs. output current v out = 3.3v c out = 0.47f 0 10 20 30 40 50 60 70 80 90 dropout voltage (mv) dropout voltage vs. temperature v out = 3.3v i out = 100a c out = 0.47f 100 120 temperature (c) 0 20 40 60 80 100 120 140 160 dropout voltage (mv) dropout voltage vs. temperature 100 120 temperature (c) v out = 3.3v i out = 10ma c out = 0.47f 0 0.2 0.4 0.6 0.8 1 1.2 1.4 01234567 input voltage (v) output voltage vs. input voltage v out = 1.2v c out = 0.47f 100a 10ma 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 output voltage vs. temperature 100 120 temperature (c) v out = 3.3v v in = v out + 1v c out = 0.47f 0 2 4 6 8 10 12 14 012345678910 output current (ma) ground pin current vs. output current v out = 3.3v v in = v out + 1v c out = 0.47f 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 input voltage (v) ground pin current vs. input voltage v out = 1.2v i out = 100a c out = 0.47f 0 2 4 6 8 10 12 14 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 input voltage (v) ground pin current vs. input voltage v out = 1.2v i out = 10ma c out = 0.47f 0 2 4 6 8 10 12 14 16 18 20 ground current (a) ground pin current vs. temperature 100 120 temperature (c) v out = 3.3v v in = v out + 1v i out = 10ma c out = 0.47f 0 20 40 60 80 100 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 input voltage (v) current limit vs. input voltage v out = 3.3v c out = 0.47f 0 0.2 0.4 0.6 0.8 1 enable threshold (v) enable-on threshold vs. temperature v out = 3.3v v in = 4.3v c out = 0.47f 100 120 temperature (c)
micrel, inc. mic5232 november 2006 6 m9999-112006-b typical characteristics (continued) 0 200 400 600 800 1000 1200 1400 turn-on time 100 120 temperature (c) v out = 1.2v v in = 2.7v c out = 0.47f i out = 100a 0 10 20 30 40 50 60 70 80 90 short cuircuit (ma) short circuit current vs. temperature v out = 0v v in = 4.3v c out = 0.47f 100 120 temperature (c) 0 10 20 30 40 50 60 70 80 90 100 2.5 3 3.5 4 4.5 5 5.5 (v out current) output voltage (v) reverse leakage current v in = 2.7v c out = 0.47f (v out > v in ) reverse current (na) 1e-02 1e-01 1e-00 1e+01 1e+02 output noise spectral density 0.1 100 frequency (khz) v out = 1.2v v in = 4.3v r out c out = 0.47f
micrel, inc. mic5232 november 2006 7 m9999-112006-b functional characteristics enabl e turn-on transient enable volta g e (2v/div) output volta g e (0.5v/div) time (200s/div) c out = 0.47f i out = 100ma v out = 1.2v 0v 0v loa d transient respon s e output current (5ma/div) output volta g e (50mv/div) time (100s/div) 10ma 100a c out = 0.47f v out = 3.3v v in = v out + 1v line transient response input volta g e (2v/div) output volta g e (200mv/div) time (200s/div) 6v 4v c out = 0.47f i out = 1ma v out = 3.3v 0v 0v
micrel, inc. mic5232 november 2006 8 m9999-112006-b application information input capacitor if there is more than 20cm of wire between in and the ac filter capacitor or if supplied from a battery, a 1f (or larger) capacitor should be placed from the in (supply input) to gnd (ground). output capacitors the mic5232 requires an out put capacitor for stability. a 0.47f, or larger capacitor, is recommended between out (output) and gnd to improve the regulator?s transient response. a 0.47f capacitor can be used to reduce overshoot recovery time at the expense of overshoot amplitude. the esr (effective series resistance) of this capacitor has no effect on regulator stability, but low- esr capacitors improve the high frequency transient response. the value of this capacitor may be increased without limit, but values larger than 10f tend to increase the settling time after a step change in input voltage or output current. minimum load current the mic5232 does not require a minimum load for proper operation. this allows the device to operate in applications where very light output currents are required for keep-alive purposes. this is important for powering sram or flash memory in low-power modes for handheld devices. safe operating conditions the mic5232 incorporates current limit in the design. there is also reverse circuit protection circuitry built into the device. the maximum junction temperature for the device is +125 c, and it is important that this is not exceeded for any length of time. thermal considerations the mic5232 is designed to provide 10ma of continuous current 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 that the input voltage is 4.3v, the output voltage is 3.3v and the output current = 10ma. the actual power dissipati on of the regulator circuit can be determined using the equation: p d = (v in ? v out ) i out + v in i gnd because this device is cmos and the ground current is typically <15 a over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. p d = (4.3v ? 3.3v) ? 10ma p d = 0.01w 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) t j (max) = 125 c, the max. junction temperature of the die, ja thermal resistance = 90 c/w table 1 shows junction-to-am bient thermal resistance for the mic5232 in the 2mm x 2mm mlf ? -6 package. package ja recommended minimum footprint jc 2mm x 2mm mlf ? -6 90 c/w 2 c/w table 1. mlf thermal resistance substituting p d for p d (max), and solving for the ambient operating temperature, will give the maximum operating conditions for t he regulator circuit. the junction-to-ambient thermal resistance for the minimum footprint is 90 c/w, from table 1. the maximum power dissipation must not be exceeded for proper operation. for example, when operati ng the mic5232-3.3bml at an input voltage of 4.3v and 10ma load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: w c t c w a / 90 125 01 . 0 ? = t a = 124c therefore, a 3.3v applicat ion at 10ma of output current can accept an ambi ent operating temperature of 124c in a 2mm x 2mm mlf ? -6 package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ?regulator thermals? section of micrel?s ?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
micrel, inc. mic5232 november 2006 9 m9999-112006-b package information 5-pin tsot-23 (d5) 6-pin 2mm x 2mm mlf ? (ml)
micrel, inc. mic5232 november 2006 10 m9999-112006-b 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 specificati ons at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. li fe support devices or systems are devices or systems that (a ) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to resul t in a significant injury to the user. a purchaser?s use or sale of micrel products for use in life s upport appliances, devices or systems is a pu rchaser?s own risk and purchaser agrees to fully indemnify micrel fo r any damages resulting from such use or sale. ? 2005 micrel, inc.
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