esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 1/8 high accuracy 30ma cmos ldo in sot-23 package general description the emp8738 features low output voltage noise, low dropout voltage, low quiescent current and fast transient response. it guarantees delivery of 30ma output current and supports preset output voltages ranging from 0.8v to 4.5v with 0.05v increment. based on its low quiescent current consumption, the emp8738 is ideal for battery-powered applications. the high power supply rejection ratio of the emp8738 holds well for low input voltages typically encountered in battery-operated systems. the regulator is stable with small ceramic capacitive loads (1f typical). the emp8738 is available in miniature 3-pin sot-23-3 package. emp products are halogen free and rohs compliant. features ? 30ma guaranteed output current ? 170v rms output voltage noise (10hz to 100khz) ? 31mv typical dropout at 30ma ? 61a typical quiescent current ? fast line and load transient response ? 4.75v to 5.25v input range ? stable with small ceramic output capacitors ? over temperature and over current protection ? 35mv output voltage tolerance applications ? keep-alive supply ? battery-powered systems ? portable information appliances typical application
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 2/8 connection diagram order information sot-23-3 (top view) emp8738-xxvb03nrr xx output voltage vb03 sot-23-3 package nrr rohs & halogen free package rating: -40 to 85c package in tape & reel pin functions name no. function gnd 1 ground pin . vout 2 output voltage feedback . vin 3 supply voltage input . require a minimum input capacitor of close to 1f to ensure stability and sufficient decoupling from the ground pin. order, mark & packing information vout marking product id packing 4.5v 8738 tracking code 3 1 2 pin1 dot EMP8738-45VB03NRR 3k units tape & reel
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 3/8 functional block diagram
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 4/8 absolute maximum ratings (notes 1, 2) vin, vout -0.3v to 6v storage temperature range -65c to160c junction temperature (t j ) 150c lead temperature (10 sec.) 240c esd rating human body model 2kv mm 200v thermal resistance ( ja ) 3-pin sot-23-3 250c/w operating ratings (note 1, 2) temperature range -40c to 85c supply voltage 4.75v to 5.25v electrical characteristics unless otherwise specified, all limits guaranteed for c in = c out = 2.2f, t a = 25c. symbol parameter conditions min typ max units v in input voltage 4.75 5.25 v v out output voltage 4.5 v v otl output voltage tolerance i out = 30ma -35 +35 mv i out maximum output current average dc current rating 30 ma i limit output current limit 300 450 ma i out = 0ma 61 i q supply current i out = 30ma 64 a v do dropout voltage (note3) i out = 30ma 31 mv e n output voltage noise v out =4.5v, i out = 30ma, 10hz f 100khz 170 v rms thermal shutdown temperature 165 t sd thermal shutdown hysteresis 35 note 1: absolute maximum ratings indicate limits beyond which damage may occur. electrical specifications do not apply when operating the device outside of its rated operating conditions. note 2: all voltages are with respect to the potential at the ground pin. note 3: dropout voltage is measured by reducing v in until v out drops 100mv from its nominal value at v in -v out = 1v.
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 5/8 typical performance characteristics unless otherwise specified, c in = c out = 1.0f, t a = 25c. psrr vs. frequency (vin=4.75v,vout=4.5v) psrr vs. frequency(vout=4.5v, iout=10ma) -90 -20 -80 -70 -60 -50 -40 -30 10 200k 20 50 100 200 500 1k 2k 5k 10k 20k 50k t frequency(hz) -90 -20 -80 -70 -60 -50 -40 -30 10 200k 20 50 100 200 500 1k 2k 5k 10k 20k 50k tt t t t frequency(hz) load transient (vout=4.5v, iout=1 0ma to 30ma) line transient (v in=4.75v to 5.25v, iout=1ma) output noise vs. frequency (vout=4.5v, iout=10ma) vin vs. quiescent current (vout=4.5v) 0 200u 20u 40u 60u 80u 100u 120u 140u 160u 180u 10 80k 20 50 100 200 500 1k 2k 5k 10k 20k frequency(hz) 0 10 20 30 40 50 60 70 80 90 4.5 4.75 5 5.25 5.5 (v) (ua) io=10ma io=20ma io=30ma vin=4.75v vin=5.25v psrr(db) psrr(db) vin=4.75v vin=5.25v noise level(uv)
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 6/8 package outline drawing sot-23-3 dimensions millimeters dimensions inches symbol min max min max a 1.000 1.400 0.039 0.055 a1 0.000 0.150 0.000 0.006 a2 0.900 1.250 0.035 0.049 b 0.250 0.500 0.010 0.020 c 0.080 0.220 0.003 0.009 d 2.750 3.050 0.108 0.120 e 1.500 1.700 0.059 0.067 e1 2.600 3.000 0.102 0.118 e 0.950typ 0.037typ e1 1.800 2.000 0.071 0.079 l 0.700ref 0.028ref l1 0.300 0.600 0.012 0.024 0 8 0 8
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 7/8 revision history revision date description 1.0 2011.08.29 original
esmt/emp emp8738 elite semiconductor memory technology inc./ elite micro power inc. publication date : aug. 2011 revision : 1.0 8/8 important notice all rights reserved. no part of this document may be repr oduced or duplicated in any form or by any means without the prior permission of esmt. the contents contained in this docume nt are believed to be accurate at the time of publication. esmt assumes no responsibility for any error in this document, and reserves the right to change the products or specification in this document without notice. the information contained herein is pr esented only as a guide or examples for the application of our products. no responsibility is assumed by esmt for any infringement of patents, copyrights, or other intellect ual property rights of third parties which may result from its use. no license, either express , implied or otherwise, is granted un der any patents, copyrights or other intellectual property righ ts of esmt or others. any semiconductor devices may have in herently a certain rate of failure. to minimize risks associated with cu stomer's application, adequate design and operating safeguards against inju ry, damage, or loss from such failure, should be provided by the customer when making application designs. esmt's products are not authorized for use in critical applications such as, but not limited to, life support devices or system, where failure or abnormal operation may directly affect human lives or cause physical injury or property damage. if products described here are to be used for such kinds of application, purchaser must do its own quality assurance testing appropriate to such applications.
|
