View AX6632_7821455.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 1.2 a high output current ldo regulator ? general description the AX6632 is a low noise , high output current, low quiescent current and low dropout linear regulator. the device includes pass element, error amplifier, band-gap, current-limit and thermal shutdown circuitry. the output current is up to 1.2a. 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 1ua. due to internal flexible design, result in extensively fixed output voltage versions form 1.2v to 5v per 0.1v steps . the adjustable output voltage is by tdfn-6l package only. bui lt -in current-limit , short current protection and thermal-shutdown functions prevent any fault condition from ic damage. ? features - input voltage range : 2.6 v~ 5.5 v - adjustable output voltage form 0.8v to 5.0v ( t dfn - 6l only) - dropout voltage is 3 8 0mv at 1 a out put current - guaranteed 1.2a output current - low quiescent current is 5 0a (typ.) - maximum supply current in shutdown mode <1ua - fixed output voltage is form 1.2 v to 5v by 0.1v steps. - fast transient response - current limit and thermal shutdown protection - sho rt circuit current fold - back - available in the sop - 8l and t dfn - 6l pb - free package s ? b lock d iagram c urrent limit - + vin vou t gnd error amp ba ndgap t hermal shutdown en able bp en v?mw`r?y?b? www.gofotech.com
2/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? pin assignment the package s of AX6632 are sop - 8l and t dfn - 6l; the pin assignment is given by : name description vin input voltage gnd ground vout output voltage. en active - low shutdown input. a logic low reduces the supply current to less than 1 a. connect to v in or floating for normal operation. bp band - gap fb /nc ( t dfn6 only) feedback input for s etting the output voltage. connect to an external resistor divider for adjustable output operation. the fixe d output voltage , pin 3 is nc. ? order/marking information order information top ma rking ( t dfn - 6 l ) top marking (sop - 8 l ) ( top view ) 1 2 3 4 8 7 6 5 vout bp sop - 8 l a x 6 6 3 2 en vin gnd gnd gnd gnd t d f n - 6 l ( 2 * 2 ) e n v o u t a x 6 6 3 2 f b / n c 1 2 3 4 5 6 b p g n d v i n ( t o p v i e w ) g n d ax 6632 - xxx xx x s : sop - 8 l output voltage package packing blank : tube a : taping 120 : 1 . 2 v 130 : 1 . 3 v 500 : 5 . 0 v z 6 : tdfn - 6 l ( 2 * 2 ) blank : adj ( tdfn only ) l ww : 01 ~ 26 ( a ~ z ) 27 ~ 52 ( a ~ z ) year : a = 2010 1 = 2011 id code : internal l y w x identification code logo 6 y ax part number id code : internal ww : 01 ~ 52 year : 10 = 2010 11 = 2011 output voltage - 1 5 6 3 2 y w w x v?mw`r?y?b? www.gofotech.com
3/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 part number identification code part number identification code AX6632 - adj ka AX6632 - 3.1v kw AX6632 - 1.2v kb AX6632 - 3.2v kx AX6632 - 1.3v kc AX6632 - 3 .3v ky AX6632 - 1.4v kd AX6632 - 3.4v kz AX6632 - 1.5v ke AX6632 - 3.5v ka AX6632 - 1.6v kf AX6632 - 3.6v kb AX6632 - 1.7v kg AX6632 - 3.7v kd AX6632 - 1.8v kh AX6632 - 3.8v ke AX6632 - 1.9v kj AX6632 - 3.9v kg AX6632 - 2.0v kk AX6632 - 4.0v kh AX6632 - 2.1v kl AX6632 - 4.1v km AX6632 - 2.2v km AX6632 - 4.2v kn AX6632 - 2.3v kn AX6632 - 4.3v kq AX6632 - 2.4v kp AX6632 - 4.4v kr AX6632 - 2.5v kq AX6632 - 4.5v kt AX6632 - 2.6v kr AX6632 - 4.6v ku AX6632 - 2.7v ks AX6632 - 4.7v kv AX6632 - 2.8v kt AX6632 - 4.8v kw AX6632 - 2.9v ku AX6632 - 4.9v kx AX6632 - 3 .0v kv AX6632 - 5.0v ky ? absolute maximum ratings (at t a =25 oc ) characteristics symbol rating unit v in pin voltage v in gnd - 0.3 to gnd + 6 v output voltage v out gnd - 0.3 to v in + 0.3 v enable voltage v en gnd - 0.3 to gnd + 6 v fb pin voltage v fb gnd - 0.3 to + 6 v power dissipation sop - 8l pd 1.67 w tdfn - 6l 0.83 storage temperature range t st - 40 to +150 oc operating temperature range t op - 4 0 to + 8 5 oc junction temperature t j - 4 0 to +125 oc thermal resistance from junction to case sop - 8l jc 20 o c /w tdfn - 6l 25 thermal resistance from junction to ambient sop - 8l ja 60 oc /w tdfn - 6l 120 note : ja is measured with the pcb copper area of approximately 1 in 2 (multi - layer). that need connect to gnd pin. v?mw`r?y?b? www.gofotech.com
4/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? e lectrical c haracteristics t a = 25 oc (unless otherwise noted) characteristics symbol conditions min typ max units input voltage v in (note1) 2.6 - 5.5 v fb voltage v fb v in =2.6v to 5.5 v, i out =1ma 0.784 0.8 0.816 v fb input leakage current i fb v fb =0.8v - 100 - 100 na adjustable output voltag e range v out t dfn - 6l package only v fb - 5.0 v output voltage accuracy (note1) v out v in =v out +0.1v to 6v v out R 2.5v, i out =1ma - 2 - +2 % v in =2.6v to 6v 2.5v v out R 1.20v, i out =1ma - 3 - +3 quiescent current i q i out =0ma, v in =5v - 50 - a shutdown current i sd v in =3.6v, i out =0ma, v en =0v - - 1 a dropout voltage v drop i out =1.0a v out =1 .50v - 1.10 1.4 v v out =1.80v - 0.8 1.1 v out =2.50v - 0.57 0.7 v out =3.30v - 0.38 0.6 current limit (note 2) i limit 1.3 1.5 - a short circuit current i short v out <1.0v - 300 - ma load regulation (note 3) v load i out =10m~1.2a - 0.4 1 % ripp le rejection psrr c in =2.2f, c o ut =2.2uf, i out =10ma bp=10nf f=120hz - 70 - db f=1khz - 60 - enable input threshold v enh regulator enable 2.0 - - v v enl regulator shutdown - - 0.6 enable pin current i enh v en =v in - 0.003 0.1 a i 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. note 2 . current limit is measured at constant junction temperature by using puls ed testing with a low on time. note 3 . regulation is measured at constant junction temperature by using pulsed testing with a low on time. v?mw`r?y?b? www.gofotech.com
5/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? a pplication c ircuit 1. fixed version: (a) sop - 8l (b) t dfn - 6l 2. adjustable version: ( t dfn - 6l only) on off vin vout gnd in c v in out c ax 6632 2 . 2 uf 2 . 2 uf out v en bp c bp 1 2 3 4 5 , 6 , 7 , 8 10 nf 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 3 2 2 . 2 u f 2 . 2 u f o u t v e n b p c b p 5 6 1 2 4 1 0 n f n c 3 on off vin vout gnd in c v in out c ax 6632 2 . 2 uf 2 . 2 uf out v en fb r 1 r 2 5 6 1 3 4 bp bp c 10 nf 2 v out = v fb *( 1 + r 1 / r 2 ) v fb = 0 . 8 v r 2 range = 50 k ~ 300 k v?mw`r?y?b? www.gofotech.com
6/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? f unction d escriptions a minimum of 2.2f 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. enable function the ax 6632 features an ldo regulator enable/disable function. to assure the ldo regulator will switch on; the en turn on contr ol level must be greater than 2.0 volts. the ldo regulator will go into the shutdown mode when the vo ltage on the en pin falls below 0. 6 volts. for to protecting the system, the ax 6632 have a quick - discharge function. if the enable function is not needed in a specific application, it may be tied to vin to keep the ldo regulator in a continuously on state . fb function the output is an adjustable version for tdfn-6l package, the fb voltage is 0.8v. the output voltage can be set by outside resistances. the output voltage, v out, is then given by the following equation: v out = 0.8* (1 + r1/r2) for the reasons of reducing power dissipation and loop stability, r2 is recommending to choose 50 k~3 00k . ? a pplication i nformation like any low-dropout regulator, the AX6632 requires input and output decoupling capacitors. the device is specifically designed for portable applications requiring minimum board space and smallest components. these capacitors must be correctly selected for good performance (see capacitor characteristics section). 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 2.2f capacitor on the input and a 2.2f capacitor on the output of the AX6632. larger input capacitor values and lower esr (x5r, x7r) provide better supply-noise rejection and transient response. a higher- value output capacitor (4.7f) may be necessary if large, fast transients are anticipated and the device is located several inches from the power source. v?mw`r?y?b? www.gofotech.com
7/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 input-output (dropout) voltage 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 dropout 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 short-circuit protection the AX6632 used a current sense-resistor to monitor the output current. a portion of the pmos output trans istors current is mirrored to a resistor such that the voltage across this resistor is proportional to the output current. once the output current exceeds limit threshold, AX6632 would be protected with a limited output current. further more, when the out put is short to ground, the output current would be folded-back to a less limit. thermal considerations the AX6632 series can deliver a current of up to 1.2a 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 125c. with 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 (m ax) - t a ) / ja where t j (max) is the maximum junction temperature of the die (125 oc ) and t a is the maximum ambient temperature. the junction to ambient thermal resistance ( ja ) for sop-8l package at recommended minimum footprint is 60 c/w. visit our website in whic h recommended footprints for soldering surface mount packages for detail. pcb layout an input capacitance of ? 2.2f is required between the AX6632 input pin and ground (the amount of the 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 vin 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. v?mw`r?y?b? www.gofotech.com
8/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? t ypical c haracteristics 3.200 3.220 3.240 3.260 3.280 3.300 3.320 3.340 3.360 3.380 3.400 0 0.2 0.4 0.6 0.8 1 1.2 iout vs vout iout (a) vout (v) vin=5v AX6632-330sa 0.760 0.770 0.780 0.790 0.800 0.810 0.820 0.830 0.840 0 0.2 0.4 0.6 0.8 1 1.2 iout vs vfb iout (a) vfb (v) vin=5v AX6632-z2a 3.20 3.22 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40 -40 -25 0 25 50 75 100 125 temperaute vs vout temperature( : ) vout (v) vin=5v iout=1ma AX6632-330sa 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84 -40 -25 0 25 50 75 100 125 temperaute vs vfb temperature( : ) vfb (v) vin=5v iout=1ma AX6632-z2a 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 0.2 0.4 0.6 0.8 1 1.2 iout vs dropout voltage iout (a) dropout voltage(v) AX6632-120sa AX6632-150sa AX6632-250sa AX6632-330sa v?mw`r?y?b? www.gofotech.com
9/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? t ypical c haracteristics (c ontinuous ) power on load transient en on v?mw`r?y?b? www.gofotech.com
10/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ? p ackage o utlines (1) sop - 8l symbol dimensions in millimeters dimensions in inches min. nom. max. min. nom. max. a - - 1.75 - - 0.069 a1 0.1 - 0.25 0.04 - 0.1 a2 1.25 - - 0.049 - - c 0.1 0.2 0.25 0.0075 0.0 08 0.01 d 4.7 4.9 5.1 0.185 0.193 0.2 e 3.7 3.9 4.1 0.146 0.154 0.161 h 5.8 6 6.2 0.228 0.236 0.244 l 0.4 - 1.27 0.015 - 0.05 b 0.31 0.41 0.51 0.012 0.016 0.02 e 1.27 bsc 0.050 bsc y - - 0.1 - - 0.004 0 o - 8 o 0 o - 8 o mold flash shall not exceed 0.25mm per side jedec outline: ms-012 aa detail a l h e a a 2 a 1 e d 7 ( 4 x ) b y c detail a v?mw`r?y?b? www.gofotech.com
11/ 11 axelite confidential materials, do not copy or distribute without written consent. rev. 1. 6 dec. 29 , 20 11 AX6632 ( 2 ) tdfn - 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 0.203 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 ) v?mw`r?y?b? www.gofotech.com

▲Up To Search▲

Price & Availability of AX6632

	To Download AX6632 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .