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aic1734 300ma low dropout linear regulator analog integrations corporation si-soft research center ds-1734g-05 20120615 3a1, no.1, li-hsin rd. i , science park , hsinchu 300, taiwan , r.o.c. tel: 886-3-5772500 fax: 886-3-5772510 www.analog.com.tw 1 ? features ? low dropout voltage of 470mv at 300ma output current (3.0v output version). ? guaranteed 300ma output current. ? low ground current at 55 ? a. ? 2% accuracy output voltage of 1.8v/ 2.0v /2.5v /2.7v/ 3.0v/ 3.3v/ 3.5v/ 3.7v/ 3.8v/ 5.0v/ 5.2v. ? only needs 1 ? f output capacitor for stability. ? current and thermal limiting. ? applications ? cd-rom drivers. ? lan cards. ? microprocessor. ? ram module. ? wireless communication systems. ? battery powered systems. ? description the aic1734 is a 3-pin low dropout linear regulator. the superior characteristics of the aic1734 include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. typical ground current remains approximately 55 ? a, for loading ranging from zero to maximum. dropout voltage at 300ma output current is except ionally low. built-in output current limiting and thermal limiting provide maximal protection to the aic1734 against fault conditions. the aic1734 is available in popular sot-23, sot-89 and to-92 packages. ? typical application circuit + + aic1734 c out 1 ? f (note1) v out vout gnd vin c in 1 ? f v in low dropout linear regulator
aic1734 2 ? ordering information to-92(zlbg) top view 1: vin 2. gnd 3. vout * straight lead option available in bag packing type only. * refer to physical dimensions for lead pitch. to-92(zttr) top view 1: gnd 2. vin 3. vout * formed lead option available in reel packing type. * refer to physical dimensions for lead pitch. pin configuration sot-89(xt) top view 1: vout 2. gnd 3. vin sot-89(xa) top view 1: gnd 2. vin 3. vout to-92(ztbg) top view 1: gnd 2. vin 3. vout * straight lead option available in bag packing type only. * refer to physical dimensions for lead pitch. 1 2 3 1 2 3 packing type tr: reel bg: bag package type u: sot-23 xa: sot-8 9 xt: sot-8 9 zt: to-92 zl: to-92 p: lead free commercial g: green package output voltage 18: 1.8v 20: 2.0v 25: 2.5v 27: 2.7v 30: 3.0v 33: 3.3v 35: 3.5v 37: 3.7v 38: 3.8v 50: 5.0v 52: 5.2v a ic1734-xxxxx xx example: aic 1734-18pxatr ? 1.8v version, in lead free sot-89 package & reel packing type aic1734-18gutr ? 1.8v version, in green sot-23 package & reel packing type sot-23(u) top view 1: gnd 2: vout 3: vin 3 1 2 to-92(zltr) top view 1: vin 2. gnd 3. vout * formed lead option available in reel packing type. * refer to physical dimensions for lead pitch. 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
aic1734 3 ? sot-23 marking part no. pu gu part no. pu gu aic1734-18xu cd18p cd18g aic1734-35xu cd35p cd35g aic1734-20xu cd20p cd20g aic1734-37xu cd37p cd37g aic1734-25xu cd25p cd25g aic1734-38xu cd38p cd38g aic1734-27xu cd27p cd27g aic1734-50xu cd50p cd50g aic1734-30xu cd30p cd30g aic1734-52xu cd52p cd52g AIC1734-33XU cd33p cd33g ? sot-89 marking part no. pxa gxa part no. pxt gxt aic1734-18xxa ca18p ca18g aic1734-18xxt cb18p cb18g aic1734-20xxa ca20p ca20g aic1734-20xxt cb20p cb20g aic1734-25xxa ca25p ca25g aic1734-25xxt cb25p cb25g aic1734-27xxa ca27p ca27g aic1734-27xxt cb27p cb27g aic1734-30xxa ca30p ca30g aic1734-30xxt cb30p cb30g aic1734-33xxa ca33p ca33g aic1734-33xxt cb33p cb33g aic1734-35xxa ca35p ca35g aic1734-35xxt cb35p cb35g aic1734-37xxa ca37p ca37g aic1734-37xxt cb37p cb37g aic1734-38xxa ca38p ca38g aic1734-38xxt cb38p cb38g aic1734-50xxa ca50p ca50g aic1734-50xxt cb50p cb50g aic1734-52xxa ca52p ca52g aic1734-52xxt cb52p cb52g ? absolute maximum ratings input supply voltage -0.3 ~12v operating temperature range -40 ? c~ 85 ? c storage temperature range -65? c~150 ? c maximum junction temperature 150 ? c lead temperature (soldering 10 sec.) 260 ? c thermal resistance junction to case sot-89 package 100 ? c/w to-92 package 120 ? c/w sot-23 package 130 ? c/w thermal resistance junction to ambient sot-89 package 160 ? c/w (assume no ambient airflow, no heatsink) to-92 package 150 ? c/w sot-23 package 180 ? c/w absolute maximum ratings are those values beyond which the life of a device may be impaired. ? test circuit refer to the typical application circuit
aic1734 4 ? electrical characteristics (t a =25 ? c, c in =1 ? f, c out =1 ? f, unless otherwise specified.) (note2) parameter test conditions min. typ. max. unit no load output voltage aic1734-52 aic1734-50 aic1734-38 aic1734-37 aic1734-35 aic1734-33 aic1734-30 aic1734-27 aic1734-25 aic1734-20 aic1734-18 v in =5.5~12v v in =5.5~12v v in =4.1~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v v in =4.0~12v 5.100 4.900 3.725 3.625 3.430 3.235 2.940 2.646 2.450 1.960 1.764 5.200 5.000 3.800 3.700 3.500 3.300 3.000 2.700 2.500 2.000 1.800 5.300 5.100 3.875 3.775 3.570 3.365 3.060 2.754 2.550 2.040 1.836 v output voltage temperature coefficiency (note 3) 50 ppm/ ? c line regulation i l = 1ma, 1.4v ? v out ? 3.2v 3.3v ? v out ? 5.2v v in =4v~12v v in =5.5v~12v 3 3 10 10 mv load regulation (note 4) i l =0.1~300ma 1.4v ? v out ? 3.9v 4.0v ? v out ? 5.2v v in =5v v in =7v 7 15 20 40 mv current limit (note 5) v in =7v, v out =0v 300 ma dropout voltage (note 6) i l =300ma 4.0v ? v out ? 5.2v 3.0v ? v out ? 3.9v 2.5v ? v out ? 2.9v 2.0v ? v out ? 2.4v 1.4v ? v out ? 1.9v 400 470 570 800 1260 500 570 670 900 1360 mv ground current i o =0.1ma~i max 1.4v ? v out ? 3.9v 4.0v ? v out ? 5.2v v in =5~12v v in =7~12v 55 55 80 80 ? a note 1: to avoid output oscillation, aluminum elec trolytic output capacitor is recommended and ceramic capacitor is not suggested. note 2: specifications are production tested at t a =25 ? c. specifications over the -40 ? c to 85 ? c operating temperature range are assured by design, characterization and correlation with statistical quality controls (sqc). note 3: guaranteed by design. note 4: regulation is measured at constant junction te mperature, using pulse testing with a low on time. note 5: current limit is measured by pulsing a short time. note 6: dropout voltage is defined as the input to output differential at wh ich the output voltage drops 100mv.
aic1734 5 ? typical performance characteristics 5.00 5.05 5.10 5.15 5.20 5.25 5.30 5.35 5.40 fig. 1 v out vs. temperature v out (v) temperature ( ?c) -50 -30 -10 10 30 50 70 90 a ic1734-52 fig. 2 v out vs. temperature v out (v) -50 -30 -10 10 30 50 70 90 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 temperature ( ?c) a ic1734-33 -40 -20 0 20 40 60 80 100 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 a ic1734-18 v out (v) temperature ( ? c) fig 3 v out vs. temperature fig. 4 ground current vs. temperature -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 38 40 42 44 46 48 50 i load = 0m a i load =100ma i load =300ma ground current ( ? a) temperature ( ?c) a ic1734-52 fig. 5 ground current vs. temperature ground current ( ? a) temperature ( ?c) -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 38 40 42 44 46 48 i load = 0ma i load =100ma i load =300ma aic1734-33 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 34 36 38 40 42 44 a ic1734-18 fig. 6 ground current vs. temperature i load =100ma i load = 300ma temperature ( ? c) i load =0ma ground current ( ? a)
aic1734 6 ? typical performance characteristic (continued) fig. 7 ground current vs. v in ground current ( ? a) v in (v) 0 1 2 3 4 5 6 7 8 9 10 11 12 0 10 20 30 40 50 60 a ic1734-52 fig. 8 ground current vs. v in ground current ( ? a) v in (v) 0 1 2 3 4 5 6 7 8 9 10 11 12 0 10 20 30 40 50 60 a ic1734-33 0 1 2 3 4 5 6 7 8 9 10 11 12 0 10 20 30 40 50 60 aic1734-18 v in (v) fig. 9 ground current vs. v in ground current ( ? a) fig. 10 v drop vs. i load v drop (mv) i load (ma) 0 50 100 150 200 250 300 350 400 0 50 100 150 200 250 300 350 400 450 500 t=-40 ?c t= 20 ?c t= 50 ?c t= 80 ?c a ic1734-52 fig. 11 v drop vs. i load v drop (mv) i load (ma) 0 50 100 150 200 250 300 350 400 0 100 200 300 400 500 600 t= 20 ?c t=-40 ?c t= 50 ?c t= 80 ?c a ic1734-33 0 50 100 150 200 250 300 350 400 400 500 600 700 800 900 1000 t=20 ? c t=80 ? c t=50 ? c aic1734-18 t=-40 ? c i load (ma) fi g . 12 v dro p vs. i load v drop (v)
aic1734 7 ? typical performance characteristic (continued) fig. 13 current limit vs. temperature -40 -20 0 20 40 60 80 400 410 420 430 440 450 460 470 480 490 500 v in = 7v v in = 8v v in = 6v v in = 5v crrent limit (ma) temperature ( ?c) a ic1734 100 200 300 0.01 0.1 1 10 100 stable region aic1734 -18 vin=5v ; c out =1uf esr(o) i out (ma) 100 200 300 0.01 0.1 1 10 100 aic1734 -18 vin=5v ; c out = 4.7uf stable region esr(o) i out (ma) 100 200 300 0.01 0.1 1 10 100 stable region aic1734 -18 vin=5v ; c out =10uf esr(o) i out (ma) fig. 14 region of stable cout esr vs. load current fig. 15 region of stable cout esr vs. load current fig. 16 region of stable cout esr vs. load current
aic1734 8 ? block diagram 1.235v reference gnd vout vin error a mp + - thermal shutdown - + current limiting ? pin descriptions vout pin - output pin. gnd pin - power gnd. vin pin - power supply input.
aic1734 9 ? application information input-output capacitors linear regulators requ ire input and output capacitors to maintain stability. a 1uf aluminum electrolytic input capacitor with a 1uf aluminum electrolytic output capacitor is recommended. to avoid oscillation, it is recommended to follow the figures of ? region of stable c out esr vs. load current? to choose proper capacitor specifications. power dissipation the aic1734 obtains thermal-limiting circuitry, which is designed to protect the device against overload condition. for continuous load condition, maximum rating of junction temperature must not be exceeded. it is important to pay more attention in thermal resistance. it includes junction to case, junction to ambient. the maximum power dissipation of aic1734 depends on the thermal resistance of its case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. the rate of temperature rise is gr eatly affected by the mounting pad configuration on the pcb, the board material, and the ambient temperature. when the ic mounting with good thermal conductivity is used, the junction temperature will be low even when large power dissipation applies. the power dissipation across the device is p = i out (v in -v out ). the maximum power dissipation is: ja a max-j max r )t-(t p ? where t j-max is the maximum allowable junction temperature (125 ? c), and t a is the ambient temperature suitable in application. as a general rule, the lower temperature is, the better reliability of the device is. so the pcb mounting pad should provide maximum thermal conductivity to maintain low device temperature. gnd pin performs a dual function for providing an electrical connection to ground and channeling heat away. therefore, connecting the gnd pin to ground with a large pad or ground plane would increase the power dissipation and reduce the device temperature.
aic1734 1 0 ? physical dimensions (unit: mm) ? sot-23 c a a2 b with plating view b l1 l seating plane gauge plane 0.25 a1 section a-a base metal e1 e d e aa e1 see view b note: 1. refer to jedec mo-178. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 10 mil per side. 3. dimension "e1" does not include inter-lead flash o r protrusions. 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact. 0 0.90 0.30 1.50 2.60 2.80 0.08 0.30 0.00 e l1 l e1 c e e1 d b a2 a1 0.95 bsc 8 0.60 1.90 bsc 0.60 ref 1.30 1.70 3.00 3.00 0.22 0.50 0.15 0.95 min. s y m b o l a1 . 4 5 max. sot-23 millimeters
aic1734 11 ? sot-89 a c e1 e b b1 d d1 h e l 0.36 0.89 3.94 2.29 1.50 4.40 0.35 0.44 e1 l h d e e d1 c b1 b 3.00 bsc 1.20 4.25 0.48 2.60 1.83 4.60 0.44 0.56 1.50 bsc 1.40 min. s y m b o l a1 . 6 0 max. sot-89 millimeters note: 1. refer to jedec to-243aa. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 6 mil per side. 3. dimension "e" does not include inter-lead flash or protrusions . 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact.
aic1734 1 2 ? to-92 (straight lead option availa ble in bag packing type only) b s a e d j e1 e l millimeters to-92 max. 5.33 a s y m b o l min. 4.32 0.47 4.19 2.66 1.39 5.20 2.66 b d e e1 l j e s 0.36 3.18 2.42 1.15 3.43 12.70 4.45 2.03 note: 1. refer to jedec to-226. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 6 mil per side . 3. dimension "a" does not include inter-lead flash or protrusions. 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact.
aic1734 1 3 ? to-92 (formed lead option available in reel packing) note: information provided by aic is believed to be accurate and reliabl e. however, we cannot assume responsibility for use of any ci rcuitry other than circuitry entirely embodied in an aic product; nor for any infringement of patents or other rights of third parties that may result from its use. we reserve the right to change t he circuitry and specifications without notice. life support policy: aic does not authorize any aic product for us e in life support devices and/or systems. life support device s or systems are devices or systems which, (i) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeli ng, can be reasonably expected to result in a significant injury to the user. f e t p1 b d p a w e f 19.0 0.5 e b 16.0 0.5 a 9.0 0.2 6.0 0.20 t 0.6 0.1 e 2.5 bsc p1 12.7 bsc 4.0 0.2 d w 18.0 0.2 symbol spec. p 1 2 .7 b s c spec. symbol

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