ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 1 of 8 march 2007 www.diodes.com ? diodes incorporated lead-free lead-free lead-free ? 3-terminal adjustable or fi xed 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 ? to252-3l, to263-3l and to220-3l package ? lead free finish/rohs compliant for lead free products (note 1) ap1086 is a low dropout positive adjustable or fixed-mode regulator with 1.5a output cu rrent capability. the product is specifically designed to provi de 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 lower than 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. ap1086 x x x x package vout d : to252-3l blank : adj 15 = 1.5v 18 = 1.8v 25 = 2.5v 33 = 3.3v 50 = 5.0v packing -u : tube -13 : taping lead free l : lead free t : to220-3l k : to263-3l note: 1. rohs revision 13.2.2003. glass and hi gh temperature solder exemptions applied, see eu directive annex notes 5 and 7 . tube 13? tape and reel device package code packaging (note 2) quantity part number suffix quantity part number suffix ap1086d d to252-3l 80 -u 2500/tape & reel -13 ap1086k k to263-3l 50 -u 800/tape & reel -13 ap1086t t to220-3l 50 -u na na note: 2. pad layout as shown on diodes inc. suggested pad layout document ap 02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf . 3 thermal shutdown 1 2 v out adj 1.25v + + current limit v in + - + - features general description ordering information block diagram
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 2 of 8 march 2007 www.diodes.com ? diodes incorporated pin assignments to252-3l to263-3l 3 2 1 vin vout tab is v out front view adj (gnd) 3 2 1 v in v out adj ( gnd) tab is v out front view to220-3l tab is v out 3 v in 2 1 v out adj ( gnd) front view 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 la rge storage capacitor is connected from this pin to ground to insure that t he 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 or der 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 +125 o c pin descriptions
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 3 of 8 march 2007 www.diodes.com ? diodes incorporated electrical characteristics (under operating conditions) parameter conditions min typ max unit reference voltage ap1086-adj t a = 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 a = 25 o c, 3v Qv in Q 12v 1.470 1.500 1.530 v ap1086-1.8 i out = 10ma, t a = 25 o c, 3.3v Qv in Q 12v 1.764 1.800 1.836 v ap1086-2.5 i out = 10ma, t a = 25 o c, 4v Qv in Q 12v 2.450 2.500 2.550 v ap1086-3.3 i out = 10ma, t a = 25 o c, 4.8v Qv in Q 12v 3.235 3.300 3.365 v output voltage ap1086-5.0 i out = 10ma, t a = 25 o c, 6.5v Qv in Q 12v 4.900 5.000 5.100 v line regulation ap1086-xxx i o = 10ma, v out +1.5v ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 4 of 8 march 2007 www.diodes.com ? diodes incorporated 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 2 ref o r r (1 vv
note: functional description introduction the ap1086 adjustable or fixed-mode low dropout (ldo) regulator is a 3 terminal device which can easily be programmed by intern al mask change to any voltages within the range of 1.25v to vin- 1.4v. 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, in tel vre specification calls for a total of +/- 100mv including initial tolerance, loa d regulation and 0 to 1.5a load step. the ap1086 is specifically designed to meet the fast current tr ansient 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 lo ad. 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 c apacitor 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 protec ts the device when the junction te mperature exceeds the maximum allowable junction temperature. although this device c an 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 secti on of a layer of the pc board as a plane to connec t the vout pin to the output capacitors to prevent any high frequency oscillation tha t may result due to excessive trace inductance.
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 5 of 8 march 2007 www.diodes.com ? diodes incorporated 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 deviation (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
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 6 of 8 march 2007 www.diodes.com ? diodes incorporated marking information (1) to252-3l 86-vv internal code xth week: 01~52 year: (top view) "02" = 2002 "01" = 2001 yy ww x x ~ 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 5.0v l : lead free (2) to263-3l / to220-3l 1086-vv internal code year: ( top view ) "02" = 2002 "01" = 2001 yy ww xx xth week: 01~52 logo part number vv: 15 for 1.5v 18 for 1.8v 25 for 2.5v 33 for 3.3v 50 for 5.0v blank for adj l : lead free
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 7 of 8 march 2007 www.diodes.com ? diodes incorporated package information (unit: mm) (1) to252-3l 5.20/5.50 typ 5.35 6.354/6.80 typ 6.58 2.28 bsc. 0.61 typ 0.88/1.27 4.57 bsc. 9.00/10.40 typ 9.70 seating plane see note2 0.51 5.6 11.0 5.6 2.0 2.25 land pattern recommendation (unit: mm) 7.2 1.2 2.18/2.40 typ 2.29 0.45/0.58 typ 0.52 0.64/1.02 typ 0.83 0.45/0.58 typ 0.52 0.89/ 1.14 5.40/6.20 typ 5.57 (2) to263-3l 9.65/10.29 typ 9.97 2.54 bsc. 2.92 typ 1.30 0.51/0.99 typ 0.75 1.14/1.40 typ1.27 8.65/9.65 typ 9.15 1.27/ 1.78 typ 1.52 14.61/15.88 typ 15.24 4.06/4.83 typ 4.45 1.14/1.40 typ 1.27 2.28/2.80 typ 2.54 1.3 3 15.7 10.9 9.1 land pattern recommendation (unit: mm) 2.54 0.38 typ
ap1086 1.5a low dropout po sitive adjustable or fixed-mode regulator ap1086 rev. 3 8 of 8 march 2007 www.diodes.com ? diodes incorporated package information (continued) (3) to220-3l 3.55/4.85 typ 4.20 0.51/1.40 typ 0.95 0.31/1.14 typ 0.72 seating plane 14.20/16.50 typ 15.35 9.70/10.70 typ 10.20 12.72/14.72 typ 13.72 0.51/1.14 typ 0.83 4.83/5.33 typ 5.08 1.14/1.78 typ 1.46 3.53/4.09 typ 3.81 5.84/6.86 typ 6.35 2.54/3.43 typ 2.98 3.66/6.35 typ 5.00 2.03/2.92 typ 2.48 2.99/2.79 typ 2.54 important notice life support diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to any product herein. diodes incorporated does not assume any liability arising out of the application or use of any pr oduct described herein; neither does it convey any license under its patent rights, nor the rights of others. the user of products in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on our website, harmless against all dam ages. diodes incorporated products are not authorized for use as critical components in life support devices or systems without the e xpressed written approval of the president of diodes incorporated. ?
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