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aic1735 500ma low dropout linear regulator analog integrations corporation si-soft research center ds-1735g-01 040606 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 z low dropout voltage of 650mv at 500ma output current (3v output version). z guaranteed 500ma output current. z low ground current at 65 a. z 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. z only needs 4.7 f output capacitor for stability. z current and thermal limiting. ? applications z cd-rom drivers. z lan cards. z microprocessor. z ram module. z wireless communication systems. z battery powered systems. ? description the aic1735 is a 3-pin low dropout linear regulator. the superior characteristics of the aic1735 include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. typical ground current remains approximately 65 a, for loading ranging from zero to maximum. dropout voltage turns substantially low when output current is 100ma. built-in output current limiting and thermal limiting provide maximal protection to the aic1735 against fault conditions. the aic1735 is available in popular sot-23, sot-223, sot-89 and to-252 packages. ? typical application circuit + + aic1735 4.7 f c out (note1) v out vout gnd vin 1 f c in v in low dropout linear regulator
aic1735 2 ? ordering information example: aic1735-18c etr ? 1.8v version, in to-252 package & tape & reel packing type aic1735-18pytr ? 1.8v version, in lead free sot-223 package & tape & reel packing type aic1735-18gytr ? 1.8v version, in green sot-223 package& tape & reel packing type ai c1735 -xxxx xx pin configuration to - 25 2 to p vie w 1: vou t 2. gnd 3. vin 2 3 1 sot-89 to p vie w 1: gnd 2. vin 3. vou t 1 2 3 sot-23 to p vie w 1: gnd 2: vou t 3: vin 3 1 2 sot-223 to p vie w 1: vou t 2. gnd 3. vin 1 2 3 packi ng t ype tr: tape & reel tb: tube pa c ka g e t y pe e: to-252 u: sot-23 x: sot-89 y: sot-223 c: commercial 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
aic1735 3 z sot-23 marking part no. cu pu gu part no. cu pu gu aic1735-18xu ce18 ce18p ce18g a ic1735-35xu ce35 ce35p ce35g aic1735-20xu ce20 ce20p ce20g a ic1735-37xu ce37 ce37p ce37g aic1735-25xu ce25 ce25p ce25g a ic1735-38xu ce38 ce38p ce38g aic1735-27xu ce27 ce27p ce27g a ic1735-50xu ce50 ce50p ce50g aic1735-30xu ce30 ce30p ce30g a ic1735-52xu ce52 ce52p ce52g aic1735-33xu ce33 ce33p ce33g z sot-89 marking part no. cx px gx part no. cx px gx aic1735-18xx cf18 cf18p cf18g aic1735-35xx cf35 cf35p cf35g aic1735-20xx cf20 cf20p cf20g aic1735-37xx cf37 cf37p cf37g aic1735-25xx cf25 cf25p cf25g aic1735-38xx cf38 cf38p cf38g aic1735-27xx cf27 cf27p cf27g aic1735-50xx cf50 cf50p cf50g aic1735-30xx cf30 cf30p cf30g aic1735-52xx cf52 cf52p cf52g aic1735-33xx cf33 cf33p cf33g z sot-223 marking part no. cy py gy part no. cy py gy AIC1735-18XY cc18 cc18p cc18g ai c1735-35xy cc35 cc35p cc35g aic1735-20xy cc20 cc20p cc20g aic1735-37xy cc37 cc37p cc37g aic1735-25xy cc25 cc25p cc25g aic1735-38xy cc38 cc38p cc38g aic1735-27xy cc27 cc27p cc27g aic1735-50xy cc50 cc50p cc50g aic1735-30xy cc30 cc30p cc30g aic1735-52xy cc52 cc52p cc52g aic1735-33xy cc33 cc33p cc33g
aic1735 4 ? absolute maximum ratings input supply voltage - 0.3~12v operating temperature range - 40 c~ 85 c maximum junction temperature 150 c storage temperature range -65 c~150 c lead temperature (soldering) 10 sec. 260 c thermal resistance junction to case sot-23 package 130 c/w to-252 package 12.5 c/w sot-89 package 100 c/w sot-223 package 15 c/w thermal resistance junction to ambient sot-23 package 180 c/w (assume no ambient airflow, no heatsink) to-252 package 100 c/w sot-89 package 160 c/w sot-223 package 130 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
aic1735 5 ? electrical characteristics (t a =25 c, c in =1 f, c out =4.7 f, unless otherwise specified.) (note2) parameter test conditions min. typ. max. unit no load output voltage aic1735-52 aic1735-50 aic1735-38 aic1735-37 aic1735-35 aic1735-33 aic1735-30 aic1735-27 aic1735-25 aic1735-20 aic1735-18 v in =5.5~12v v in =5.5~12v v in =4.7~12v v in =4.7~12v v in =4.7~12v v in =4.7~12v 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 =0.1~500ma 1.4v v out 3.9v 4.0v v out 5.2v v in =5v v in =7v 10 20 30 50 mv current limit (note 5) v in =7v, v out =0v 500 ma dropout voltage (note 6) i l =500ma 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 510 650 780 1100 1400 710 850 980 1300 1600 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 65 65 90 90 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 juncti on temperature, 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 which the output voltage drops 100mv below the value measured with a 1v differential.
aic1735 6 ? typical performance characteristics fig. 1 v drop vs. i load v drop (mv) i load (ma) 0 50 100 150 200 250 300 350 400 450 500 0 100 200 300 400 500 t=25 c a ic1735-52 fig. 2 v drop vs. i load v drop (mv) 0 50 100 150 200 250 300 350 400 450 500 0 100 200 300 400 500 600 a ic1735-33 t=25 c i load (ma) fig. 3 v drop vs. temperature v drop (mv) temperature ( c) -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 320 340 360 380 400 420 440 460 480 a ic1735-52 i load =500ma fig. 4 v drop vs. temperature v drop (mv) -40 -20 0 20 40 60 80 460 480 500 520 540 560 580 600 620 640 a ic1735-33 temperature ( c) i load =500ma fig. 5 ground current vs. i load ground current ( a) 0 50 100 150 200 250 300 350 400 450 500 43.0 43.5 44.0 44.5 45.0 45.5 46.0 t=25 c a ic1735-52 i load (ma) fig. 6 ground current vs. i load ground current ( a) i load (ma) 0 50 100 150 200 250 300 350 400 450 500 43.0 43.5 44.0 44.5 45.0 45.5 46.0 t=25 c a ic1735-33
aic1735 7 ? typical performance characteristics (continued) fig. 7 ground current vs. temperature ground current ( a) -40 -20 0 20 40 60 80 40 41 42 43 44 45 46 temperature ( c) aic1735-52 i load = 500ma fig. 8 ground current vs. temperature ground current ( a) temperature ( c) -40 -20 0 20 40 60 80 43.0 43.5 44.0 44.5 45.0 45.5 46.0 aic1735-33 i load = 500ma fig. 9 current limit vs. temperature current limit (ma) -40 -20 0 20 40 60 80 580 590 600 610 620 630 640 650 660 670 680 690 700 a ic1735 v in = 7v temperature ( c) v in = 6v v in = 5v 100 200 300 400 500 0.01 0.1 1 10 100 stable region aic1735 -18 vin=5v ; c out =1uf esr(o) i out (ma) 100 200 300 400 500 0.01 0.1 1 10 100 aic1735 -18 vin=5v ; c out = 4.7uf stable region esr(o) i out (ma) 100 200 300 400 500 0.01 0.1 1 10 100 stable region aic1735 -18 vin=5v ; c out =10uf esr(o) i out (ma) fig. 11 region of stable cout esr vs. load current fig. 12 region of stable cout esr vs. load current fig. 10 region of stable cout esr vs. load current
aic1735 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. ? application information input-output capacitors linear regulators requ ire input and output capacitors to maintain stability. a 1uf aluminum electrolytic input capacitor with a 4.7uf 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 aic1735 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 aic1735 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 q c), and t a is the ambient
aic1735 9 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. ? physical dimensions (unit: mm) z sot-23 0 0.90 0.30 1.50 2.60 2.80 0.08 0.30 0.05 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 a 1.45 max. sot-23 millimeters 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 and e1 do not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 10 mil per side. 3.controlling dimension is millimet er, converted inch dimensions are not necessarily exact.
aic1735 10 z to-252 millimeters to-252-3l max. 2.38 a s y m b o l min. 2.19 0.13 5.46 0.61 0.89 6.22 6.73 0.89 2.67 ref 0.51 bsc 10.41 1.78 2.03 1.02 2.28 bsc a1 b b3 c2 e d c h l l1 l2 l4 l3 e 0.00 4.95 0.46 0.46 5.33 6.35 9.40 1.40 0.89 -- 0.64 0 8 c2 see view b a h b3 a a e e d l3 l4 c base metal with plating seating plane b section a-a view b a1 l l1 gauge plane l2 note: 1.refer to jedec to-252aa and ab. 2.dimension d and e do not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3.controlling dimension is millimet er, converted inch dimensions are not necessarily exact.
aic1735 11 z 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 a 1.60 max. sot-89 millimeters note: 1.refer to jedec to-243aa. 2.controlling dimension is millimet er, converted inch dimensions are not necessarily exact.
aic1735 12 z sot-223 note: information provided by aic is believed to be accurate and reli able. however, we cannot assume responsibility for use of any circuitry other than circuitry entirely em bodied in an aic product; nor for any infringement of patents or other rights of thir d parties that may result from its use. we reserve the right to change the 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 surgic al implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with inst ructions for use provided in t he labeling, can be reasonably expe cted to result in a significant injury to the user. 3.30 0 1.55 0.90 6.70 6.30 0.23 2.90 0.66 0.02 e1 l e1 e b2 d e c b a2 a1 3.70 8 2.30 bsc 4.60 bsc 1.65 7.30 6.70 0.33 3.10 0.84 0.10 min. s y m b o l a1 . 8 0 max. sot-223 millimeters c b a a2 with plating view b 0.25 l seating plane gauge plane base metal section a-a d e e1 e aa b2 e1 see view b note: 1. refer to jedec to-261aa. 2. dimension d and e1 are determined at the outermost extremes of the plastic body excl usive of mold flash, tie bar burrs, gate burrs, and interlea d flash, but including any mismatch between the top and bottom of the plastic body. 3. controlling dimension is millimeter, converted inch dimensions are not necessarily exact.

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