1 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 6 00ma ldo l inear regulator with shutdown ? general description the AX6607 is a low dropout , positive linear regulator with very low quiescent . it can supply 6 00ma output current . the bp pin with a 10nf bypass capacitor can help reduce the output noise level . the characteristics of low dropout voltage and less quiescent current make it good for some critical current application, for example, some battery powered devices. the typical quiescent current is approximately 50 a . in the shutdown mode, the maximum supply current is less than 2 a . the AX6607 regulator is able to operate with output capacitors as small as 1 f for stability. the ax660 7 series are offering several fixed output voltage types including 1. 5 v , 1.8v, 2.5 v, 2.6v, 2.7v, 2.8v, 3.0v, 3.3v and adjustable version . built - in current - limit and thermal - shutdown functions prevent any fault condition from ic damage. ? features - input voltage range : 2. 6 v~ 5.5 v - adjustable and 1.5/1.8/2.5/2.6/2.7/2.8/3.0/3.3v fixed o utput v oltage s - vout adjust range from v fb to 5.0v - guaranteed 6 00ma output current - very low quiescent current at 50 a (typ.) - needs only 1 f capacitor for stability - maximum su pply current in shutdown mode <2 a - current limit and thermal shutdown protection - short circuit current fold - back - available in the sot - 23 - 5l and t dfn - 6l pb - free package s ? b lock d iagram fixed version adjustable version current limit - + vin vout gnd error amp bandgap thermal shutdown enable bp en nc current limit - + vin vout gnd error amp bandgap thermal shutdown enable fb en
2 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? pin assignment the package s of AX6607 are sot - 23 - 5l and tdfn - 6l ; the pin assignment is given by : ? order/marking information order information top marking ( sot - 23 - 5l ) t op marking ( t dfn - 6l) name description vin vo ltage input. the input capacitor in the range of 1 f to 10 f is sufficient. gnd ground en enable pin (active high) bp reference noise bypass (the bypass capacitor R 1 nf ) vout output voltage, the AX6607 is stable with an output capacitor 1f for greater. fb/nc for adjustable output voltage version only , the pin connects two resistances to decide output voltage. when use fixed output voltage version, this pin is nc pin. a x 6 6 0 7 - x x x x x o u t p u t v o l t a g e p a c k a g e p a c k i n g b l a n k : b a g a : t a p i n g 1 5 : 1 . 5 v 1 8 : 1 . 8 v 3 3 : 3 . 3 v 2 5 : 2 . 5 v 2 8 : 2 . 8 v 3 0 : 3 . 0 v 2 6 : 2 . 6 v 2 7 : 2 . 7 v b l a n k : a d j z 6 : t d f n - 6 l ( 2 * 2 ) b : s o t - 2 3 - 5 l l i d e n t i f i c a t i o n c o d e w w : 0 1 ~ 2 6 ( a ~ z 2 7 ~ 5 2 ( a ~ z ) y e a r : a = 2 0 1 0 1 = 2 0 1 1 i d c o d e : i n t e r n a l ) l y w x 2 = 2 0 1 2 : : 9 = 2 0 1 9 l l y w x r e f e r i d e n t i f i c a t i o n c o d e y e a r : a = 2 0 1 0 1 = 2 0 1 1 2 = 2 0 1 2 o u t p u t t y p e w e e k : 0 1 ~ 2 6 ( a ~ z ) 2 7 ~ 5 2 ( a ~ z ) i d c o d e : i n t e r n a l : : 9 = 2 0 1 9 ( t o p v i e w ) s o t - 2 3 - 5 l 3 2 5 4 1 v i n g n d e n b p ( f b ) v o u t a d j u s t a b l e v e r s i o n : p i n 4 i s f b f i x e d v e r s i o n : p i n 4 i s b p tdfn - 6 l ( 2 * 2 ) en vout fb / nc 1 2 3 4 5 6 bp gnd vin ( top view ) gnd
3 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 appendix part number identification code part number identification code AX6607 - adj fa AX6607 - 2.7v fp AX6607 - 1.5v fi AX6607 - 2.8v fn AX6607 - 1.8v fk AX6607 - 3.0v fr ax66 07 - 2.5v fm AX6607 - 3.3v fs AX6607 - 2.6v fj ? a bsolute m aximum r atings (at t a =25 oc ) characteristics symbol rating unit v in pin voltage v in gnd - 0.3 to 7 v output voltage v out gnd - 0.3 to 7 v enable voltage v en gnd - 0.3 to 7 v feedback voltage v fb gn d - 0.3 to 7 v power dissipation sot - 23 - 5l pd 400 mw tdfn - 6l 830 storage temperature range t st - 40 to +150 oc operating temperature range t op - 40 to +85 oc junction temperature t j - 40 to +125 oc thermal resistance from junction to case sot - 2 3 - 5 l jc 180 oc/w tdfn - 6 l 25 thermal resistance from junction to ambient sot - 2 3 - 5 l ja 250 oc/w tdfn - 6 l 120 note : ja is measured with the pcb copper area of approximately 1 in 2 (multi - layer). that need connect to gnd (exposed pad) pin.
4 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? e lectrical c haracteristics (v in =5v, t a =25 oc , unless otherwise noted) characteristics symbol conditions min typ max units input voltage v in i out =30ma (note1) 2.6 - 5.5 v quiescent current i q i out =0ma - 50 80 a sd v in =3.6v, i out =0ma, v en =0v - - 1 a v out v in =v out +0.1v to 5.5v v out R out =1ma - 2 - +2 % v in =2.6v to 5.5v 2.5v out R out =1ma - 3 - +3 feedback voltage v fb v in =2.6v to 5.5v, i out =1ma 0.784 0.8 0.816 v fb inp ut leakage current i fb v fb =0.8v - 100 - 100 na dropout voltage (note2) v drop i out =600ma , 1.5v Q out Q out =600ma , 2.1 v out Q out =600 ma , 2.8 v out Q limit 700 - - ma short circuit curr ent i short output voltage < 0.375*v out - 300 - ma load regulation (note 3) v load i out =10m~0.6a - 10 30 mv ripple rejection psrr c in =1f, o ut =1 f out =10ma f=120hz - 65 - db f=1khz - 55 - enable input threshold v enh 1.5 - - v v enl - - 0.4 enable pin current i enh v en =v in - 0.003 0.1 a enl v in =3.6v, v en =0v - 0.35 1 temperature shutdown t s - 140 - oc temperature shutdown hysterisis t sh - 30 - oc note1. minimum v in voltage is defined by output adds a dropout voltage. note2. the dropout voltage is defined as v in - v out , which is measured when v out drop about 100mv. note3. regulation is measured at constant junction temperature by using pulsed testing with a low on time.
5 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? a pplication c ircuit (1) fixed output voltage versi on (2) adjustable output voltage version en c bp on off 10 nf ( option ) vin vout gnd in c v in out c ax 6607 - xx 1 uf 1 uf out v en bp e n o n o f f v i n v o u t g n d i n c v i n o u t c a x 6 6 0 7 - z 6 1 u f 1 u f o u t v e n f b / n c r 1 r 2 c b p 1 0 n f ( o p t i o n ) b p v out = v fb *( 1 + r 1 / r 2 ) v fb = 0 . 8 v r 2 range = 50 k ~ 300 k
6 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? f unction d escriptions a minimum of 1 f capacitor must be connected from v out to ground to insure stability. typically a large storage capacitor is connected from v in to ground to ensure that the input voltage does not sag below the minimum dropout voltage during the load transient response. this pin must always be dropout voltage higher than v out in order for the device to regulate properly. ? a pplication i nformation like any low - dropout regulator, the AX6607 requires input and output decoupling capacitors. the device is specifically desig ned for portable applications requiring minimum board space and smallest components. these capacitors must be correctl y selected for good performance . please note that linear regulators with a low dropout voltage have high internal loop gains which require care in guarding against oscillation caused by insufficient decoupling capacitance. capacitor selection normally, use a 1 f capacitor on the input and a 1 f capacitor on the output of the AX6607 . larger input capacitor values and lower esr (x5r, x7r ) provide better supply - noise rejection and transient response. a higher - value output capacitor ( 2.2 f ) may be necessary if large, fast transients are anticipated and the device is located several inches from the power source. input - output (dropout) volt age a regulator's minimum input - to - output voltage differential (dropout voltage) determines the lowest usable supply voltage. in battery - powered systems, this determines the useful end - of - life battery voltage. because the device uses a pmos, its dropo ut voltage is a function of drain - to source on - resistance, r ds (on) , multiplied by the load current: v dropout = v in - v out = r ds (on) x i out current limit an d thermal shutdown protection in order to prevent overloading or thermal co ndition from damaging the device, AX6607 regulator has internal thermal and current limiting functions designed to protect the device. it will rapidly shut off pmos pass element during overloading or over temperature condition.
7 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 thermal considerati ons the AX6607 series can deliver a current of up to 6 00ma over the full operating junction temperature range. however, the maximum output current must be dated at higher ambient temperature to ensure the junction temperature does not exceed 125 c. wi th all possible conditions, the junction temperature must be within the range specified under operating conditions. power dissipation can be calculated based on the output current and the voltage drop across regulator. pd = (v in - v out ) i out the final operating junction temperature for any set of conditions can be estimated by the following thermal equation: pd (max) = ( t j (max) - t a ) / j a where t j (max) is the maximum junction temperature of the die (125 c) and t a is t he maximum ambient temperature. the junction to ambient thermal resistance ( ja ) for t dfn - 6l package at recommended minimum footprint is 120 c/w . pcb layout an input capacitance of ? 1 f is required between the AX6607 input pin and ground (the amount of t he capacitance may be increased without limit), this capacitor must be located a distance of not more than 1cm from the input and return to a clean analog ground. input capacitor can filter out the input voltage spike caused by the surge current due to the inductive effect of the package pin and the printed circuit boards routing wire. otherwise, the actual voltage at the v in pin may exceed the absolute maximum rating. the output capacitor also must be located a distance of not more than 1cm from output to a clean analog ground. because it can filter out the output spike caused by the surge current due to the inductive effect of the package pin and the printed circuit board s routing wire.
8 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? t ypical c haracteristics power on load t ransient 1.180 1.184 1.188 1.192 1.196 1.200 1.204 1.208 1.212 1.216 1.220 2.5 3 3.5 4 4.5 5 5.5 v in vs. v out v in (v) v out (v) i out =10ma 1.170 1.175 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 1.225 1.230 0 0.1 0.2 0.3 0.4 0.5 0.6 i out vs. v out i out (a) v out (v) v in =3.3v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0.1 0.2 0.3 0.4 0.5 0.6 i out vs dropout voltage i out (a) dropout voltage(v) v out =1.2v v out =1.5v v out =2.5v v out =3.3v v out =1.8v v out =5.0v temperature vs. v fb 0.750 0.760 0.770 0.780 0.790 0.800 0.810 0.820 0.830 -40 -20 0 25 50 75 100 125 temperature ( ) v fb (v)
9 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 ? p ackage o utlines (1) t dfn - 6l (2*2 0.75mm) symbol dimensions i n millimeters dimensions i n inches min. nom. max. min. nom. max. a 0.70 0.75 0.80 0.028 0.030 0.031 a1 0.00 0.02 0.05 0.000 0.001 0.002 a3 0.20 3 ref. 0.008 ref . b 0.2 0 0.2 8 0.3 5 0.009 0.011 0.013 d 1.95 2.00 2.05 0.077 0.079 0.081 d2 1. 35 1.5 0 1.6 5 0.055 0.059 0.063 e 1.95 2.00 2.05 0.07 7 0.079 0.081 e2 0. 75 0.9 0 1.0 5 0.031 0.035 0.039 e 0.65 bsc. 0.026 bsc. l 0.20 0.3 0 0.4 0 0.008 0.012 0. 016 e d a a 1 a 3 d 2 e e 2 ( top view ) ( bottom view ) b pin 1 l seating plane ( side view )
10 / 10 axelite confidential materials, do not copy or distribute without written consent . rev. 2. 8 nov . 26 , 20 1 2 AX6607 (2) sot - 23 - 5l symbol dimensions in millimeters dimensions in inches min. nom. max. min. nom. max. a - - 1.45 - - 0.057 a1 0.00 0.08 0.15 0 0.003 0.006 a2 0.90 1.10 1.30 0.035 0.043 0.051 b 0.30 0.40 0.50 0.0 12 0.016 0.020 c 0.08 0.15 0.22 0.003 0.006 0.009 d 2.70 2.90 3.10 0.106 0.114 0.122 e1 1.40 1.60 1.80 0.055 0.063 0.071 e 2.60 2.80 3.00 0.102 0.110 0.118 l 0.30 0.45 0.60 0.012 0.018 0.024 l1 0.50 0.60 0.70 0.020 0.024 0.028 e1 1.9 bsc 0.075 bsc e 0.95 bsc 0.037 bsc 0 o 4 o 8 o 0 o 4 o 8 o 1 5 o 10 o 15 o 5 o 10 o 15 o 2 5 o 10 o 15 o 5 o 10 o 15 o jedec outline: mo - 178 aa l e 1 e 1 e d a 2 a 1 b ( 5 x ) a detal a l 1 1 ( 4 x ) 2 ( 4 x ) e gauge plane c detal a
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