1.5a low dropout positive adjust able or fixed-mode regulator ap1086 this datasheet contains new product information. anachip corp. reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev.1.0 may. 14, 2004 1/9 ? features ? 3-terminal adjustable or fixed 1.5v, 1.8v, 2.5v,3.3v, 5.0v. ? 1.4v maximum dropout at full load current. ? fast transient response. ? built-in thermal shutdown. ? output current limiting. ? general description ap1086 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1.5a output current capability. the product is specifically designed to provide well-regulated supply for low voltage ic applications such as high-speed bus termination and low current 3.3v logic supply. ap1086 is also well suited for other applications such as vga cards. ap1086 is guaranteed to have <1.4v dropout at full load current making it ideal to provide well-regulated outputs of 1.25v to 5.0v with 4.7 to 12v input supply by different output voltage. ? ordering information ap1086 x x x x low dropout regulator package vout d : to252-3l k : to263-3l t : to220-3l blank : adj 15 = 1.5v 18 = 1.8v 25 = 2.5v 33 = 3.3v 50 = 5.0v packing blank : tube a : taping lead free blank : normal l : lead free package ? typical application 5v to 3.3v fixed mode regulator adjustable regulator c2 100uf 5v 3.3v/1.5a tab is vout vin vout gnd c1 100uf r1 121 r2 121 c2 100uf 5v 2.5v/1.5a tab is vout vin vout c1 100uf adj v out =v ref (1+r2/r1) ? ?
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 2/9 ? block diagram 3 thermal shutdown 1 2 vout adj (gnd) 1.25v + + current limit vin + + ? functional d escription introduction the ap1086 adjustable or fixed-mode low dropout(ldo) regulator is a 3 terminal device which can easily be programmed by internal mask change to any voltages within the range of 1.25 to 5v. the ap1086 only needs 1.4v differential between vin and vout to maintain output regulation. in addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. for example, intel vre specification calls for a total of +/- 100mv including initial tolerance, load regulation and 0 to 1.5a load step. the ap1086 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors. load regulation since the ap1086 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. but it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode. stability the ap1086 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. for most applications a minimum of 10uf aluminum electrolytic capacitor insures both stability and good transient response. thermal design the ap1086 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. although this device can operate with junction temperatures in the range of 150 o c, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is kept below the temperature. layout consideration the output capacitors must be located as close to the vout terminal of the device as possible. it is recommended to use a section of a layer of the pc board as a plane to connect the vout pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance.
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 3/9 ? connection diagram 3 pin to263 3 pin to252 3 pin to220 3 2 1 vin vout tab is vout front view adj (gnd) 3 2 1 vin vout adj (gnd) tab is vout front view tab is vout 3 vin 2 1 vout front view adj (gnd) ? pin descriptions name i/o pin # function adj (gnd) 1 adjustable (ground only for fixed mode) vout o 2 the output of the regulator. a minimum of 10uf capacitor must be connected from this pin to ground to insure stability. vin i 3 the input pin of regulator. typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. this pin must always be 1.4v higher than vout in order for the device to regulate properly. ? absolute maximum ratings symbol parameter rating unit vin dc supply voltage -0.3 to 12 v p d power dissipation internally limited t st storage temperature -65 to +150 o c t op operating junction temperature range 0 to +150 o c
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 4/9 ? electrical characteristics (under operating conditions) parameter conditions min typ max unit reference voltage ap1086-adj t j =25 o c,(v in -v out )=1.5v,i o =10ma 1.225 1.250 1.275 v ap1086-1.5 i out = 10ma, t j = 25 o c, 3v Q v in Q 12v 1.470 1.500 1.530 v output voltage ap1086-1.8 i out = 10ma, t j = 25 o c, 3.3v Q v in Q 12v 1.764 1.800 1.836 v ap1086-2.5 i out = 10ma, t j = 25 o c, 4v Q v in Q 12v 2.450 2.500 2.550 v ap1086-3.3 i out = 10ma, t j = 25 o c, 4.8v Q v in Q 12v 3.235 3.300 3.365 v ap1086-5.0 i out = 10ma, t j = 25 o c, 6.5v Q v in Q 12v 4.900 5.000 5.100 v line regulation ap1086-xxx i o =10ma, v out +1.5v 1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 5/9 ? typical performance characteristics temperature ( o c) percent change in output voltage vs temperature output voltage change (%) -50 -25 0 25 50 75 100 125 150 - 2 -1.5 - 1 -0.5 0 0. 5 1 1.5 2 input voltage (v) line regulation output voltage deviation (%) 0 0.2 0.4 0.6 0.8 1 24 6 8 10 12 time (us) line transient response output voltage deviati on (mv) input voltage (v) -40 -20 0 20 40 5.5 6.5 7.5 cin=1uf cout=10uf tantalum 0 20 40 60 80 100 120 140 160 180 200 time (us) load transient response load current (a) output voltage deviation (mv) 010 20 30 40 50 60 70 80 90 100 -1 0 1 2 -20 -10 0 10 20 30 cin=1uf cout=10uf tantalum preload=100ma temperature ( o c) load regulation vs temperature output voltage deviation (%) -25 0 25 50 75 100 125 - 1 -0.80 -0.40 -0.20 0 0.20 i load=1.5a output current (a) dropout voltage vs output current dropout voltage (v) 0 0. 2 0. 4 0. 6 0. 8 1. 0 1. 2 1. 4 1. 6 1. 8 2. 0 0 tj = 25 o c tj = 125 o c 0.25 0.5 0.75 1.0 1.25 1.5
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 6/9 ? marking information logo part number 1086 for adj 86-vv : 15 for 1.5v 18 for 1.8v 25 for 2.5v 33 for 3.3v 50 for 5v yy : year ww: nth week x : internal code ( optional) ( top view) ac 86-vv yywwx x blank: normal l: lead free package (to252-3l) logo part number vv : 15 for 1.5v 18 for 1.8v 25 for 2.5v 33 for 3.3v 50 for 5v blank for adj yy : year ww: nth week x : internal code ( optional) ( top view) ac 1086-vv yywwx x blank: normal l: lead free package (to220-3l / to263-3l)
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 7/9 ? package dimension (1) to263-3l e e a l2 c2 c l1 b b2 d l3 l dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 4.06 4.45 4.83 0.160 0.175 0.190 b 0.51 0.75 0.99 0.020 0.030 0.039 b2 1.14 1.27 1.40 0.045 0.050 0.055 c 0.38 typ. 0.015 typ. c2 1.14 1.27 1.40 0.045 0.050 0.055 d 8.65 9.15 9.65 0.341 0.360 0.380 e 9.65 9.97 10.29 0.380 0.393 0.405 e 2.54 bsc. 0.100 bsc. l 14.61 15.24 15.88 0.575 0.600 0.625 l1 2.28 2.54 2.80 0.090 0.100 0.110 l2 - 1.30 2.92 - 0.051 0.115 l3 1.27 1.52 1.78 0.050 0.060 0.070
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 8/9 (2) to252-3l b2 e e b l2 e1 d l1 a c1 c a1 h seating plane see note2 l notes: 1. jedec outline: to-252 ab 2. mils suggested for positive contact at mounting. dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 2.18 2.29 2.39 0.086 0.090 0.094 a1 1.02 1.15 1.27 0.040 0.045 0.050 b 0.61 typ. 0.024 typ. b2 5.20 5.35 5.50 0.205 0.211 0.217 c 0.46 0.52 0.58 0.018 0.020 0.023 c1 0.46 0.52 0.58 0.018 0.020 0.023 d 5.33 5.57 5.80 0.210 0.219 0.228 e 6.35 6.58 6.80 0.250 0.259 0.268 e 2.25 bsc. 0.089 bsc. e1 4.50 bsc. 0.177 bsc. h 9.00 9.70 10.40 0.354 0.382 0.409 l 0.51 - - 0.020 - - l1 0.64 0.83 1.02 0.025 0.033 0.040 l2 1.52 1.78 2.03 0.060 0.070 0.080
1.5a low dropout positive adjust able or fixed-mode regulator ap1086 anachip corp. www.anachip.com.tw rev.1.0 may. 14, 2004 9/9 (3) to220-3l a j1 f c seating plane d q e l1 l b e e1 b1 p h1 dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 3.55 4.20 4.85 0.140 0.165 0.191 b1 1.14 1.46 1.78 0.045 0.057 0.070 b 0.51 0.83 1.14 0.020 0.033 0.045 c 0.31 0.72 1.14 0.012 0.028 0.045 d 14.20 15.35 16.50 0.559 0.604 0.650 e 9.70 10.20 10.70 0.382 0.402 0.421 e 2.29 2.54 2.79 0.090 0.100 0.110 e1 4.83 5.08 5.33 0.190 0.200 0.210 f 0.51 0.95 1.40 0.020 0.037 0.055 h1 5.84 6.35 6.86 0.230 0.250 0.270 j1 2.03 2.48 2.92 0.080 0.098 0.115 l 12.72 13.72 14.72 0.501 0.540 0.580 l1 3.66 5.00 6.35 0.144 0.197 0.250 ?p 3.53 3.81 4.09 0.139 0.150 0.161 q 2.54 2.98 3.43 0.100 0.117 0.135
|
