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| ame 1 ame8845 3a cmos ldo rev.c.03 n typical application n functional block diagram l very low dropout voltage l guaranteed 3a output l accurate to within 1.5% l 300 m a quiescent current typically l over-temperature shutdown l current limiting l short circuit current fold-back l low temperature coefficient l all ame ? s lead free products meet rohs stangdards the ame8845 family of linear regulators feature low quiescent current (300 m a typ.) with low dropout voltage, making them ideal for battery applications. it is available in to-252, sot-223, to-263 and to-220 packages. the space-efficient to-252, sot-223 packages are attractive for "pocket" and "hand held" applications. output voltages are set at the factory and trimmed to 1.5% accuracy. these rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "worst" operating conditions. the ame8845 is stable with an output capacitance of 2.2 m f or greater. l instrumentation l portable electronics l wireless devices l pc peripherals l battery powered widgets n general description n features n applications 2 . 2 m f ame 8845 v in in gnd out 0 . 1 m f v out gnd out in overcurrent shutdown thermal shutdown v ref amp r 1 r 2 - +
ame 2 3a cmos ldo ame8845 rev.c.03 n pin configuration to-252-2 top view to-252-2 top view ame 8845aecsxxx 1. in 2. gnd (tab) 3. out * die attach: conductive epoxy ame 8845becsxxx 1. gnd 2. out (tab) 3. in * die attach: non-conductive epoxy sot-223 top view to-220-3 top view ame 8845aebtxxx 1. in 2. gnd (tab) 3. out * die attach: conductive epoxy to-220-3 top view ame 8845bebtxxx 1. gnd 2. out (tab) 3. in * die attach: non-conductive epoxy sot-223 top view ame8845aegtxxx 1. in 2. gnd (tab) 3. out * die attach: conductive epoxy ame8845begtxxx 1. gnd 2. out (tab) 3. in * die attach: non-conductive epoxy 1 3 2 ame 8845 1 3 2 ame 8845 amexxxx 1 ame 8845 2 3 amexxxx 1 ame 8845 2 3 1 3 2 ame 8845 1 3 2 ame 8845 ame 3 ame8845 3a cmos ldo rev.c.03 n pin configuration to-263-3 top view ame 8845aedtxxx 1. in 2. gnd (tab) 3. out * die attach: conductive epoxy to-263-3 top view ame 8845bedtxxx 1. gnd 2. out (tab) 3. in * die attach: non-conductive epoxy 1 3 2 ame 8845 1 3 2 ame 8845 ame 4 3a cmos ldo ame8845 rev.c.03 n ordering information ame8845 x x x x xxx x output voltage number of pin package type operating ambient temperature range pin configuration special feature a: 1. in e: -40 o c to +85 o c b: to-220 s: 2 150: v=1.5v z: lead free (to-252-2) 2. gnd c: to-252 t: 3 180: v=1.8v 3. out d: to-263 250: v=2.5v b: 1. gnd (to-252-2) 2. out 3. in a: 1. in (to-263-3) 2. gnd 3. out b: 1. gnd (to-263-3) 2. out 3. in a: 1. in (to-220-3) 2. gnd 3. out b: 1. gnd (to-220-3) 2. out 3. in a: 1. in (sot-223) 2. gnd 3. out b: 1. gnd (sot-223) 2. out 3. in special feature pin configuration output voltage operating ambient temperature range package type number of pins v=3.3v g: sot-223 330: ame 5 ame8845 3a cmos ldo rev.c.03 n ordering information(contd.) note: yyww/ yww represents the date code * a line on top of the first letter represents lead free plating such as ame8845 please consult ame sales office or authorized rep./distributor for output voltage and package type availability. part number marking* output voltage package operating ambient temperature range ame8845aebt150z ame8845 aebt150 yyww 1.50 to-220-3 - 40 o c to +85 o c ame8845aebt180z ame8845 aebt180 yyww 1.80 to-220-3 - 40 o c to +85 o c ame8845aebt250z ame8845 aebt250 yyww 2.50 to-220-3 - 40 o c to +85 o c ame8845aebt330z ame8845 aebt330 yyww 3.30 to-220-3 - 40 o c to +85 o c ame8845bebt150z ame8845 bebt150 yyww 1.50 to-220-3 - 40 o c to +85 o c ame8845bebt180z ame8845 bebt180 yyww 1.80 to-220-3 - 40 o c to +85 o c ame8845bebt250z ame8845 bebt250 yyww 2.50 to-220-3 - 40 o c to +85 o c ame8845bebt330z ame8845 bebt330 yyww 3.30 to-220-3 - 40 o c to +85 o c ame8845aecs150z ame8845 aecs150 yyww 1.50 to-252-2 - 40 o c to +85 o c ame8845aecs180z ame8845 aecs180 yyww 1.80 to-252-2 - 40 o c to +85 o c ame8845aecs250z ame8845 aecs250 yyww 2.50 to-252-2 - 40 o c to +85 o c ame8845aecs330z ame8845 aecs330 yyww 3.30 to-252-2 - 40 o c to +85 o c ame 6 3a cmos ldo ame8845 rev.c.03 n ordering information(contd.) part number marking* output voltage package operating ambient temperature range ame8845becs150z ame8845 becs150 yyww 1.50 to-252-2 - 40 o c to +85 o c ame8845becs180z ame8845 becs180 yyww 1.80 to-252-2 - 40 o c to +85 o c ame8845becs250z ame8845 becs250 yyww 2.50 to-252-2 - 40 o c to +85 o c ame8845becs330z ame8845 becs330 yyww 3.30 to-252-2 - 40 o c to +85 o c ame8845aedt150z ame8845 aedt150 yyww 1.50 to-263-3 - 40 o c to +85 o c ame8845aedt180 ame8845 aedt180 yyww 1.80 to-263-3 - 40 o c to +85 o c ame8845aedt180z ame8845 aedt180 yyww 1.80 to-263-3 - 40 o c to +85 o c ame8845aedt250 ame8845 aedt250 yyww 2.50 to-263-3 - 40 o c to +85 o c ame8845aedt250z ame8845 aedt250 yyww 2.50 to-263-3 - 40 o c to +85 o c ame8845aedt330z ame8845 aedt330 yyww 3.30 to-263-3 - 40 o c to +85 o c ame8845bedt150z ame8845 bedt150 yyww 1.50 to-263-3 - 40 o c to +85 o c ame8845bedt180z ame8845 bedt180 yyww 1.80 to-263-3 - 40 o c to +85 o c ame8845bedt250z ame8845 bedt250 yyww 2.50 to-263-3 - 40 o c to +85 o c ame8845bedt330z ame8845 bedt330 yyww 3.30 to-263-3 - 40 o c to +85 o c ame 7 ame8845 3a cmos ldo rev.c.03 n ordering information part number marking* output voltage package operating ambient temperature range ame8845aedv150z ame8845 aedv150 yyww 1.50 to-263-5 - 40 o c to +85 o c ame8845aedv180z ame8845 aedv180 yyww 1.80 to-263-5 - 40 o c to +85 o c ame8845aedv250z ame8845 aedv250 yyww 2.50 to-263-5 - 40 o c to +85 o c ame8845aedv330z ame8845 aedv330 yyww 3.30 to-263-5 - 40 o c to +85 o c ame8845bedv150z ame8845 bedv150 yyww 1.50 to-263-5 - 40 o c to +85 o c ame8845bedv180z ame8845 bedv180 yyww 1.80 to-263-5 - 40 o c to +85 o c ame8845bedv250z ame8845 bedv250 yyww 2.50 to-263-5 - 40 o c to +85 o c ame8845bedv330z ame8845 bedv330 yyww 3.30 to-263-5 - 40 o c to +85 o c ame8845aegt150z bgiyww 1.50 sot-223 - 40 o c to +85 o c ame8845aegt180 bazyww 1.80 sot-223 - 40 o c to +85 o c ame8845aegt180z bazyww 1.80 sot-223 - 40 o c to +85 o c ame8845aegt250 azsyww 2.50 sot-223 - 40 o c to +85 o c ame8845aegt250z azsyww 2.50 sot-223 - 40 o c to +85 o c ame8845aegt330z bdfyww 3.30 sot-223 - 40 o c to +85 o c ame 8 3a cmos ldo ame8845 rev.c.03 n absolute maximum ratings n recommended operating conditions n thermal information * measure q jc on backside center of tab. parameter package die attach symbol maximum unit conductive epoxy 6 non-conductive epoxy 24 conductive epoxy 5 non-conductive epoxy 30 conductive epoxy 5 non-conductive epoxy 27 conductive epoxy 25 non-conductive epoxy 31 q jc to-263-3 sot-223 o c / w thermal resistance* (junction to case) to-220-3 to-252-2 parameter maximum unit input voltage -0.3 to +7 v en voltage -0.3 to +7 v output voltage -0.3 to v in + 0.3 v output current p d / (v in - v out ) ma esd classification b* caution: stress above the listed absolute maximum rating may cause permanent damage to the device * hbm b:2000~3999v parameter symbol rating unit ambient temperature range t a - 40 to +85 o c junction temperaturen range t j - 40 to +125 o c storage temperaturen range t stg - 65 to +150 o c ame 9 ame8845 3a cmos ldo rev.c.03 n thermal information(contd.) ** mil-std-202g 210f parameter package die attach symbol maximum unit conductive epoxy 55 non-conductive epoxy 80 conductive epoxy 90 non-conductive epoxy 140 conductive epoxy 80 non-conductive epoxy 100 conductive epoxy 120 non-conductive epoxy 135 conductive epoxy 2200 non-conductive epoxy 1600 conductive epoxy 1200 non-conductive epoxy 1000 conductive epoxy 1700 non-conductive epoxy 1400 conductive epoxy 900 non-conductive epoxy 800 150 o c 350 o c internal power dissipation sot-223 p d to-220-3 to-252-2 thermal resistance (junction to ambient) q ja o c / w mw maximum junction temperature solder iron(10 sec)** to-263-3 sot-223 to-220-3 to-252-2 to-263-3 ame 10 3a cmos ldo ame8845 rev.c.03 n electrical specifications v in = v o(nom) +1v, c in =0.1 m f, c out =2.2 m f, t a = 25 o c unless otherwise noted note1:v in(min) =v out +v dropout parameter symbol min typ max units input voltage v in note 1 6 v output voltage accuracy v o -1.5 1.5 % 1.5v<=v o(nom) <=1.8v 1200 1.8v ame 11 ame8845 3a cmos ldo rev.c.03 the ame8845 family of cmos regulators contain a pmos pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. the p-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal pro- tection circuits. during normal operation, the error ampli- fier compares the output voltage to a precision reference. over-current and thermal shutdown circuits become ac- tive when the junction temperature exceeds 140 o c, or the current exceeds 4.5a. during thermal shutdown, the output voltage remains low. normal operation is restored when the junction temperature drops below 110 o c. the ame8845 behaves like a current source when the load reaches 4.5a. however, if the load impedance drops below 0.3 ohms, the current drops back to 600ma to prevent excessive power dissipation. normal operation is restored when the load resistance exceeds 0.75 ohms. n detailed description n external capacitors the ame8845 is stable with an output capacitor to ground of 2.2 m f or greater. ceramic capacitors have the lowest esr, and will offer the best ac performance. con- versely, aluminum electrolytic capacitors exhibit the high- est esr, resulting in the poorest ac response. unfortu- nately, large value ceramic capacitors are comparatively expensive. one option is to parallel a 0.1 m f ceramic ca- pacitor with a 10 m f aluminum electrolytic. the benefit is low esr, high capacitance, and low overall cost. a second capacitor is recommended between the in- put and ground to stabilize vin. the input capacitor should be at least 0.1 m f to have a beneficial effect. all capacitors should be placed in close proximity to the pins. a "quiet" ground termination is desirable. this can be achieved with a "star" connection. ame 12 3a cmos ldo ame8845 rev.c.03 2.4 2.44 2.48 2.52 2.56 2.6 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 temperature ( o c) o u t p u t v o i l t a g e ( v ) 250 270 290 310 330 350 370 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 temperature ( o c) q u i e s c e n t c u r r e n t @ 5 v ( u a ) 0 50 100 150 200 250 300 350 400 450 0.0 1.0 2.0 3.0 4.0 5.0 6.0 supply voltage (v) q u i e s c e n t c u r r e n t ( u a ) 125 o c 85 o c 55 o c 25 o c -5 o c -45 o c 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 -40 -30 -20 -10 0 10 20 25 30 40 50 60 70 80 90 100 110 125 temperature( o c) c u r r e n t l i m i t ( a ) temperature stability quiescent current vs.temperature quiescent current vs. supply voltage dropout voltage vs. load current dropout voltage vs. temperature current limit vs. temperature 0 50 100 150 200 250 300 350 400 450 0.0 0.5 1.0 1.5 2.0 2.5 3.0 load current (a) d r o p o u t v o l t a g e ( m v ) -45 o c -5 o c 25 o c 55 o c 85 o c 125 o c v out =2.5v 150 200 250 300 350 400 450 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 temperature ( o c) d r o p o u t v o l t a g e @ 3 a ( m v ) v out =2.5v ame 13 ame8845 3a cmos ldo rev.c.03 output voltage(2.5v) vs. input voltage psrr vs. frequency load regulation deviation output noise vs. frequency ground current vs. load current -45c 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 1 2 3 4 5 6 input voltage (v) o u t p u t v o l t a g e ( v ) 125 o c 55 o c -5 o c 25 o c -45 o c 85 o c -0.06 -0.04 -0.02 0.00 0.04 0.06 0.08 0.10 0.14 0.16 -40 -30 -20 -10 0 10 20 25 30 40 50 60 70 80 90 100 110 125 temperature( o c) o u t p u t v o l t a g e d e v i a t i o n ( % ) 0.12 0.02 v out =2.5v c in =3.3 m f (ceramic) c out =3.3 m f (ceramic) d i l =3a -80 -70 -60 -50 -40 -30 -20 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 1.0e+06 frequency (hz) p s r r ( d b ) v in =5v i load =100ma c l =10 m f v out =3.3v 0 5 10 15 20 25 10 100 1000 10000 100000 frequency (hz) o u t p u t n o i s e ( u v ) v in =5v v il =100ma c l =10 m f v out =3.3v 0 50 100 150 200 250 300 350 0.0 0.5 1.0 1.5 2.0 2.5 3.0 iq(ua) vout = 3.3v cin= 0.1 g f(ceramic) cout= 2.2 g f(ceramic) vin= vo+1.0v load current (a) g r o u n d c u r r e n t ( m a ) time (20 g s/div) i n p u t v o l t a g e ( v ) o u t p u t v o l t a g e d e v i a t i o n ( m v ) 100 50 0 5.3 4.3 cin= 0 cout= 4.7 g f(ceramic) vout = 3.3v vin= 5.3v~4.3v =25 o c i load =1ma t a line transient response ame 14 3a cmos ldo ame8845 rev.c.03 li load transient response time (500 g s/div) l o a d c u r r e n t ( a ) o u t p u t v o l t a g e d e v i a t i o n ( m v ) 100 50 0 3 0.1 cin= 0.1 g f(ceramic) cout= 10uf(tantalum) vout = 3.3v vin= 5.3v~4.3v =25 o c i load :100ma--->3a t a ame 15 ame8845 3a cmos ldo rev.c.03 package carrier width (w) pitch (p) part per full reel reel size to-252-2 16.00.1 mm 4.00.1 mm 2500pcs 3301 mm package carrier width (w) pitch (p) part per full reel reel size sot-223 12.00.1 mm 4.00.1 mm 2500pcs 3301 mm n tape and reel dimension carrier tape, number of components per reel and reel size sot-223 w p pin 1 ame ame carrier tape, number of components per reel and reel size to-252-2 w p pin 1 ame ame ame 16 3a cmos ldo ame8845 rev.c.03 package carrier width (w) pitch (p) part per full reel reel size to-263-3 24.00.1 mm 4.00.1 mm 800pcs 3301 mm w p pin 1 n tape and reel dimension carrier tape, number of components per reel and reel size to-263-3 ame ame ame 17 ame8845 3a cmos ldo rev.c.03 n package dimension to-263-3 a b r h g k n e d p top view side view b 1 a 2 bottom view pin 1 c front view min max min max a 9.65 10.67 0.380 0.420 b 8.28 9.66 0.326 0.380 c 4.06 4.83 0.160 0.190 d 0.50 1.36 0.020 0.054 e 1.14 1.45 0.045 0.057 g h 14.60 15.875 0.5748 0.625 k 0.99 2.93 0.03898 0.11535 n p 2.28 2.80 0.08976 0.11024 r 0 o 8 o 0 o 8 o b1 5.00 5.70 0.197 0.224 a2 7.30 8.05 0.287 0.317 symbols millimeters inches 0.31 0.012 * 2.54 * 0.100 *: typical value notes: 1. controlling dimension: millimeters. 2. maximum lead thickness includes lead finish thickness mini- mum lead thickness is the minimum thickness of base material. to-252-2(dpak)-eiaj *: typical value notes: 1. controlling dimension: millimeters. 2. maximum lead thickness includes lead finish thickness mini- mum lead thickness is the minimum thickness of base material. e k l f g h j b a d c e 1 d 1 top view side view pin 1 min max min max a 0.43 0.58 0.0169 0.0230 b 1.60 1.95 0.0630 0.0768 c 0.51 1.78 0.0200 0.0701 d 0.43 0.60 0.0169 0.0236 e 6.35 6.80 0.2500 0.2677 f 5.36 7.20 0.2110 0.2835 g 2.20 3.00 0.0866 0.1181 h - * 2.30 - *0.0906 j - 0.97 - 0.0380 k 5.20 5.50 0.2047 0.2165 l d1 e1 3.81 5.10 0.1500 0.2008 3.80 ref 0.1496 ref 1.40 ref 0.0551 ref symbols millimeters inches ame 18 3a cmos ldo ame8845 rev.c.03 n package dimension sot-223 to-220-3 c 13 o ( 4 x ) top view side view c d b 1 h e e a 1 b 13 o ( 4 x ) front view f pin 1 bottom view side view top view g p k n o m d a p 1 c e i g 1 pin 1 min max min max a 5.58 7.49 0.2197 0.2949 c 2.03 4.83 0.0799 0.1902 d 0.50 1.40 0.0197 0.0551 e 0.30 1.15 0.0118 0.0453 g 9.65 10.67 0.3799 0.4201 i 3.53 4.09 0.1390 0.1610 k 0.50 1.15 0.0197 0.0453 m 1.14 1.78 0.0449 0.0701 n 2.28 2.80 0.0898 0.1102 o 12.70 14.74 0.5000 0.5803 p 14.22 16.51 0.5598 0.6500 p1 5.00 5.70 0.1969 0.2244 g1 7.30 8.05 0.2874 0.3169 symbols millimeters inches min max min max a 1 0.01 0.10 0.0004 0.0039 b 0.60 0.84 0.0236 0.0330 b 1 2.90 3.15 0.1140 0.1240 c 0.24 0.38 0.0094 0.0150 d 6.30 6.71 0.2480 0.2640 e 3.30 3.71 0.1299 0.1460 f 1.40 1.80 0.0551 0.0709 e h 6.70 7.30 0.2638 0.2874 q 0 o 10 o 0 o 10 o 2.30 bsc 0.0906 bsc millimeters inches symbols life support policy: these products of ame, inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of ame, inc. ame, inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ? ame, inc. , april 2011 document: 2093-ds8845-c.03 corporate headquarter ame, inc. 2f, no.302, rui-guang road, nei-hu district taipei 114, taiwan . tel: 886 2 2627-8687 fax: 886 2 2659-2989 www.ame.com.tw e-mail: sales@ame.com.tw |
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