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gc3-k028a page 1 application manual ldo regulator ic tk705xxs/tk707xxs,tk706xxh/tk708xxh contents 1 . description 2 2 . features 2 3 . applications 2 4 . pin configuration 2 5 . package outline 3 6 . block diagram 5 7 . absolute maximum ratings 5 8 . electrical characteristics 6 9 . test circuit 9 10 . typical characteristics 10 11 . pin description 20 12 . applications information 21 13 . notes 25 14. offices 25
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 2 tk705xxs/tk707xxs,tk706xxh/tk708xxh 1. description tk705xxs/tk707xxs and tk706xxh/tk708xxh is a low dropout linear regulator with on/off control, which can supply 100ma load current. the ic is an integrated circuit with a silicon monolithic bipolar structure. the output voltage, trimmed with high accuracy, is available from 1.5 to 5.0v in 0.1v steps. the packages are the small and thin son2017-6, and the extremely versatile sot23-5. the ic is designed for portable applications with space requirements, battery powered system and any electronic equipment. two kinds of pin configuration can be selected for each package. the over current, over heat sensor and reverse bias over current protection circuits are built-in. esd is also high, so it won?t break easily. it is possible to use at ease. 2. features ! output current: 100ma, peak 200ma ! active high on/off control ! excellent ripple rejection ratio: 80db (f=1khz) 70db (f=10khz) ! output capacitance: cout 0.47 f(ceramic) ! output voltage accuracy: 1.5% or 50mv ! short circuit protection (over current protection) ! internal thermal shutdown (over heat protection) ! reverse bias protection 3. applications ! any electronic equipment ! battery powered systems ! mobile communication 4. pin configuration top view sot23-5 tk705xxs vin vout np gnd vcont 4 3 2 5 1 tk707xxs vin vout np gnd vcont 4 3 2 5 1 son2017-6 tk706xxh *2pin,5pin are connected in the ic. vin vout np gnd vcont gnd 4 3 5 2 6 1 tk708xxh *2pin,5pin are connected in the ic. vin vout np gnd vcont gnd 4 3 5 2 6 1 axx bxx axx bxx
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 3 5. package outline ! sot23-5 ! son2017-6 2.9 1.6 1.1 0.15 0.4 2.8 2.4 reference mount pad 1.0 0.7 (0.3) 0 ~0.1 0.1 1.3max 0.1 0.2 mark 0.2 0.2 5 4 1 3 +0.10 ? 0.05 +0.10 ? 0.05 0.95 0.95 0.95 0.95 m 0.1 1.7 0.20 +0.10 ? 0.05 0.65 m 0.10 +0.2 ? 0.1 2.0 +0.2 ? 0.1 1 4 3 6 (0.1) 0.75 (0.2) ? + 0.10 0.125 +0.10 ? 0.05 2.1 0.2 ? + ( 0 . 2 ) 1 4 3 6 reference mount pad 1.8 0.6 0.3 0.65 mark 1 pin mark lot no. lead free mark 6. ordering information l t k 7 0 s : sot23-5 h : son2017-6 tape / reel code rank code c : c rank voltage code ex 28 : 2.8v c 30 : 3.0v pin configuration 5 or 7 : sot23-5 6 or 8 : son2017-6 package code
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 4 marking tk705xxs/tk706xxh : axx part number mark part number mark part number mark part number mark tk70513sc tk70613hc a13 tk70523sc tk70623hc a23 tk70533sc tk70633hc a33 tk70543sc tk70643hc a43 tk70514sc tk70614hc a14 tk70524sc tk70624hc a24 tk70534sc tk70634hc a34 tk70544sc tk70644hc a44 tk70515sc tk70615hc a15 tk70525sc tk70625hc a25 tk70535sc tk70635hc a35 tk70545sc tk70645hc a45 tk70516sc tk70616hc a16 tk70526sc tk70626hc a26 tk70536sc tk70636hc a36 tk70546sc tk70646hc a46 tk70517sc tk70617hc a17 tk70527sc tk70627hc a27 tk70537sc tk70637hc a37 tk70547sc tk70647hc a47 tk70518sc tk70618hc a18 tk70528sc tk70628hc a28 tk70538sc tk70638hc a38 tk70548sc tk70648hc a48 tk70519sc tk70619hc a19 tk70529sc tk70629hc a29 tk70539sc tk70639hc a39 tk70549sc tk70649hc a49 tk70520sc tk70620hc a20 tk70530sc tk70630hc a30 tk70540sc tk70640hc a40 tk70550sc tk70650hc a50 tk70521sc tk70621hc a21 tk70531sc tk70631hc a31 tk70541sc tk70641hc a41 tk70522sc tk70622hc a22 tk70532sc tk70632hc a32 tk70542sc tk70642hc a42 tk707xxs/tk708xxh : bxx part number mark part number mark part number mark part number mark tk70713sc tk70813hc b13 tk70723sc tk70823hc b23 tk70733sc tk70833hc b33 tk70743sc tk70843hc b43 tk70714sc tk70814hc b14 tk70724sc tk70824hc b24 tk70734sc tk70834hc b34 tk70744sc tk70844hc b44 tk70715sc tk70815hc b15 tk70725sc tk70825hc b25 tk70735sc tk70835hc b35 tk70745sc tk70845hc b45 tk70716sc tk70816hc b16 tk70726sc tk70826hc b26 tk70736sc tk70836hc b36 tk70746sc tk70846hc b46 tk70717sc tk70817hc b17 tk70727sc tk70827hc b27 tk70737sc tk70837hc b37 tk70747sc tk70847hc b47 tk70718sc tk70818hc b18 tk70728sc tk70828hc b28 tk70738sc tk70838hc b38 tk70748sc tk70848hc b48 tk70719sc tk70819hc b19 tk70729sc tk70829hc b29 tk70739sc tk70839hc b39 tk70749sc tk70849hc b49 tk70720sc tk70820hc b20 tk70730sc tk70830hc b30 tk70740sc tk70840hc b40 tk70750sc tk70850hc b50 tk70721sc tk70821hc b21 tk70731sc tk70831hc b31 tk70741sc tk70841hc b41 tk70722sc tk70822hc b22 tk70732sc tk70832hc b32 tk70742sc tk70842hc b42
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 5 7. block diagram bandgap reference over heat & over current protection vin vcont vout np gnd 500k control circuit 320k 8. absolute maximum ratings ta=25 c parameter symbol rating units conditions absolute maximum ratings supply voltage vcc max -0.4 ~ 16 v -0.4 ~ 6 v vout 2.0v reverse bias vrev max -0.4 ~ 12 v 2.1v vout np pin voltage vnp max -0.4 ~ 5 v control pin voltage vcont max -0.4 ~ 16 v storage temperature range t stg -55 ~ 150 c 460 *1 mw sot23-5 power dissipation p d 400 *2 mw son2017-6 operating condition operating temperature range t op -40 ~ 85 c operating voltage range v op 2.1 ~ 14 v short circuit current ishort 200 ma over current protection *1 : internal limited tj=140c. p d must be decreased at rate of 4.0 mw/ c for operation above 25 c. *2 : internal limited tj=140c. p d must be decreased at rate of 3.5 mw/ c for operation above 25 c. the maximum ratings are the absolute limitation values with the possibility of the ic breakage. when the operation exceeds this standard, quality cannot be guaranteed.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 6 9. electrical characteristics the parameters with min. or max. values will be guaranteed at ta=tj=25 c with test when manufacturing or sqc(statistical quality control) methods. the operation between -40 ~ 85 c is guaranteed when design. vin=vout typ +1v,vcont=1.8v,ta=tj=25 c value parameter symbol min typ max units conditions output voltage vout refer to table 1 v iout = 5ma line regulation linreg 0.0 5.0 mv ? vin = 5v load regulation loareg refer to table 1 mv iout = 5ma ~ 50ma refer to table 1 mv iout = 5ma ~ 100ma dropout voltage *1 vdrop 90 160 mv iout = 50ma 160 280 mv iout = 100ma output current *2 iout 100 ma peak output current *2 iout peak 150 200 ma when (vout typ 0.9) quiescent current iq 75 120 a iout = 0ma standby current istandby 0.0 0.1 a vcont = 0v ground pin current ignd 1.5 2.7 ma iout = 50ma control terminal *3 control current icont 5.0 15.0 a vcont = 1.8v control voltage vcont 1.8 v vout on state 0.35 v vout off state reference value np terminal voltage vnp 1.26 v output voltage / temp. vout/ta 35 ppm / c output noise voltage (vout typ =3.0v) vnoise 38 vrms cout=1.0 f, cnp=0.01 f iout=30ma ripple rejection (vout typ =3.0v) r.r 80 db cout=1.0 f, cnp=0.001 f iout=10ma, f=1khz 70 db f=10khz rise time (vout typ =3.0v) tr 35 s cout=1.0 f, cnp=0.001 f vcont: pulse wave (100hz) vcont on vout 95% point *1 : for vout 2.0v , no regulations. *2 : the output current is limited by power dissipation. *3 : the input current decreases to pa level when control terminal is connected to gnd (off state). general note: parameter with only typical value is for reference only.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 7 table 1 . output voltage, load regulation load regulation output voltage iout = 50ma iout = 100ma min typ max typ max typ max part number v v v mvmvmvmv vout typ =1.3v ~ 2.0v tk70513/ 70713sc tk70613/ 70813hc 1.250 1.300 1.350 5.0 10.0 10.0 22.0 tk70514/ 70714sc tk70614/ 70814hc 1.350 1.400 1.450 5.0 10.0 10.0 23.0 tk70515/ 70715sc tk70615/ 70815hc 1.450 1.500 1.550 5.0 11.0 10.0 24.0 tk70516/ 70716sc tk70616/ 70816hc 1.550 1.600 1.650 5.0 11.0 11.0 25.0 tk70517/ 70717sc tk70617/ 70817hc 1.650 1.700 1.750 5.0 11.0 11.0 25.0 tk70518/ 70718sc tk70618/ 70818hc 1.750 1.800 1.850 5.0 12.0 11.0 26.0 tk70519/ 70719sc tk70619/ 70819hc 1.850 1.900 1.950 5.0 12.0 11.0 27.0 tk70520/ 70720sc tk70620/ 70820hc 1.950 2.000 2.050 5.0 12.0 12.0 28.0 vout typ =2.1v ~ 3.0v tk70521/ 70721sc tk70621/ 70821hc 2.050 2.100 2.150 5.0 12.0 12.0 28.0 tk70522/ 70722sc tk70622/ 70822hc 2.150 2.200 2.250 6.0 13.0 12.0 29.0 tk70523/ 70723sc tk70623/ 70823hc 2.250 2.300 2.350 6.0 13.0 13.0 30.0 tk70524/ 70724sc tk70624/ 70824hc 2.350 2.400 2.450 6.0 13.0 13.0 31.0 tk70525/ 70725sc tk70625/ 70825hc 2.450 2.500 2.550 6.0 14.0 13.0 31.0 tk70526/ 70726sc tk70626/ 70826hc 2.550 2.600 2.650 6.0 14.0 14.0 32.0 tk70527/ 70727sc tk70627/ 70827hc 2.650 2.700 2.750 6.0 14.0 14.0 33.0 tk70528/ 70728sc tk70628/ 70828hc 2.750 2.800 2.850 6.0 14.0 14.0 34.0 tk70529/ 70729sc tk70629/ 70829hc 2.850 2.900 2.950 6.0 15.0 15.0 34.0 tk70530/ 70730sc tk70630/ 70830hc 2.950 3.000 3.050 6.0 15.0 15.0 35.0 vout typ =3.1v ~ 4.0v tk70531/ 70731sc tk70631/ 70831hc 3.050 3.100 3.150 7.0 15.0 15.0 36.0 tk70532/ 70732sc tk70632/ 70832hc 3.150 3.200 3.250 7.0 15.0 16.0 37.0 tk70533/ 70733sc tk70633/ 70833hc 3.250 3.300 3.350 7.0 16.0 16.0 37.0 tk70534/ 70734sc tk70634/ 70834hc 3.349 3.400 3.451 7.0 16.0 16.0 38.0 tk70535/ 70735sc tk70635/ 70835hc 3.447 3.500 3.553 7.0 16.0 16.0 39.0 tk70536/ 70736sc tk70636/ 70836hc 3.546 3.600 3.654 7.0 17.0 17.0 40.0 tk70537/ 70737sc tk70637/ 70837hc 3.644 3.700 3.756 7.0 17.0 17.0 40.0 tk70538/ 70738sc tk70638/ 70838hc 3.743 3.800 3.857 7.0 17.0 17.0 41.0 tk70539/ 70739sc tk70639/ 70839hc 3.841 3.900 3.959 8.0 17.0 18.0 42.0 tk70540/ 70740sc tk70640/ 70840hc 3.940 4.000 4.060 8.0 18.0 18.0 43.0
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 8 table 1 . output voltage, load regulation (continue) load regulation output voltage iout = 50ma iout = 100ma min typ max typ max typ max part number v v v mvmvmvmv vout typ =4.1v ~ 5.0v tk70541/ 70741sc tk70641/ 70841hc 4.038 4.100 4.162 8.0 18.0 18.0 43.0 tk70542/ 70742sc tk70642/ 70842hc 4.137 4.200 4.263 8.0 18.0 19.0 44.0 tk70543/ 70743sc tk70643/ 70843hc 4.235 4.300 4.365 8.0 18.0 19.0 45.0 tk70544/ 70744sc tk70644/ 70844hc 4.334 4.400 4.466 8.0 19.0 19.0 46.0 tk70545/ 70745sc tk70645/ 70845hc 4.432 4.500 4.568 8.0 19.0 20.0 46.0 tk70546/ 70746sc tk70646/ 70846hc 4.531 4.600 4.669 8.0 19.0 20.0 47.0 tk70547/ 70747sc tk70647/ 70847hc 4.629 4.700 4.771 8.0 20.0 20.0 48.0 tk70548/ 70748sc tk70648/ 70848hc 4.728 4.800 4.872 9.0 20.0 21.0 49.0 tk70549/ 70749sc tk70649/ 70849hc 4.826 4.900 4.974 9.0 20.0 21.0 49.0 tk70550/ 70750sc tk70650/ 70850hc 4.925 5.000 5.075 9.0 20.0 21.0 50.0
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 9 10. test circuit 10-1. tk705xxs/tk706xxh tk705xxs (sot23-5) vin vout np vcont gnd 4 3 2 5 1 vin icont vcont iin cin iout vout 1.0 f1.0 f 0.001 f a v a cout cnp vin vout np gnd vcont gnd tk706xxh (son2017-6) vin vout np gnd vcont gnd 4 3 5 2 6 1 *2pin and 5pin are connected in the ic. 10-2. tk707xxs/tk708xxh tk707xxs (sot23-5) vin vout np gnd vcont 4 3 2 5 1 vin icont vcont icc cin cout cnp iout vout 1.0uf 1.0uf 0.001uf v a a vin vout np gnd vcont gnd tk708xxh (son2017-6) vin vout np gnd vcont gnd 4 3 5 2 6 1 *2pin and 5pin are connected in the ic.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 10 11. typical characteristics 11-1-1. dc characteristics ! line regulation test conditions -35 -30 -25 -20 -15 -10 -5 0 5 10 0246810121416 vin ( v) vout (mv) vo ut = 1.5,2.0,3.0,4.0,5.0v cnp 0.001 f cout 1.0 f iout=5ma cin 1.0 f vcont 1.8v vin =vout typ +1v vin vout vcont np ! iin vs vin iout=0ma ! quiescent current iout=0ma 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0246810121416 vin ( v) iin (ma) vo ut = 1.5,2.0,3.0,4.0,5.0v 0 20 40 60 80 100 120 140 160 180 200 0246810121416 vin ( v) iq ( a) ! load regulation ! peak output current -30 -25 -20 -15 -10 -5 0 5 050100 iout (ma) vout (ma) vo ut =1 .5 v 2.0v 3.0v 4.0v 5.0v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0 50 100 150 200 250 300 iout (ma) vout (v) 5.0v 4.0v 3.0v 2.0v 1.5v vo ut =
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 11 ! gnd pin current test conditions 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 050100 iout (ma) ignd (ma) cnp 0.001 f cout 1.0 f iout=5ma cin 1.0 f vcont 1.8v vin =vout typ +1v vin vout vcont np ! dropout voltage 2.1v vout typ ! standby current (off state) vcont=0v -160 -140 -120 -100 -80 -60 -40 -20 0 050100 iout (ma) vdrop (mv ) 1.e-11 1.e-10 1.e-09 1.e-08 1.e-07 1.e-06 0246810121416 vin ( v) istanby (a) ! control current ! control current, on/off point 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 10121416 vco n t ( v) icont ( a) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 1.0 2.0 vco n t ( v) icont ( a) icont vo ut
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 12 ! vout vs vin regulation point 2.1v vout typ test conditions -160 -140 -120 -100 -80 -60 -40 -20 0 20 40 -200 -100 0 100 200 300 ? vin ( m v) vout (mv) iout=0,50,100ma cnp 0.001 f cout 1.0 f iout=5ma cin 1.0 f vcont 1.8v vin =vout typ +1v vin vout vcont np ! vout vs vin regulation point vout typ =1.5v ! vout vs vin regulation point vout typ =2.0v 1.34 1.36 1.38 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.5 1.6 1.7 1.8 1.9 2.0 vin ( v) vout (v) iout=0,50,100ma 1.84 1.86 1.88 1.90 1.92 1.94 1.96 1.98 2.00 2.02 2.04 1.8 1.9 2.0 2.1 2.2 2.3 vin ( v) vout (v) iout=0,50,100ma ! reverse bias current vin=0v, vcont=0v test conditions 0 20 40 60 80 100 120 140 160 180 200 024681012 vr ev ( v) irev ( a) vo ut =3 .0 v 4.0v 5.0v vo ut =1 .5 v vo ut =2 .0 v cnp 0.001 f cout 1.0 f vin=0v cin 1.0 f vcont 0v vrev vin vout vcont np irev
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 13 11-1-2. temperature characteristics ! vout vout typ =3.0v test conditions -40 -30 -20 -10 0 10 20 -40-20 0 20406080100 ta vout (mv) 35.15 ppm/ cnp 0.001 f cout 1.0 f iout=5ma cin 1.0 f vcont 1.8v vin =vout typ +1v vin vout vcont np ! peak output current vout=vout typ 0.9 ! gnd pin current 0 50 100 150 200 250 -40-200 20406080100 ta( ) ioutpeak(ma) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 -40-20 0 20406080100 ta(c) ignd(ma) iout=100ma iout=50ma iout=30ma ! dropout voltage 2.1v vout typ ! quiescent current iout=0ma 0 50 100 150 200 250 300 -40 -20 0 20 40 60 80 100 ta(c) vdrop(mv ) iout=100ma iout=50ma iout=30ma 0 20 40 60 80 100 120 140 160 -40 -20 0 20 40 60 80 100 ta iq( a)
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 14 test conditions cnp 0.001 f cout 1.0 f iout=5ma cin 1.0 f vcont 1.8v vin =vout typ +1v vin vout vcont np ! load regulation vout typ =3.0v ! line regulation ? vin = 5v -60 -50 -40 -30 -20 -10 0 -40-20 0 20406080100 ta( ) loareg(mv) iout=30ma iout=50ma iout=100ma -20 -15 -10 -5 0 5 10 15 20 -40-20 0 20406080100 ta( ) linreg(mv) ! control current ! on/off point 0 2 4 6 8 10 12 14 16 18 20 -40-20 0 20406080100 ta( ) icont( a) vco n t =4 v vco n t =3 v vco n t =2 v vcont=1.8v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40-20 0 20406080100 ta vcont(v) vo ut _ on vo ut _ off
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 15 11-2. ac characteristics (vout typ =3.0v) ripple rejection ! cout=0.22 f, 0.47 f, 1.0 f, 2.2 f test conditions cnp 0.001 f cout iout=10ma vcont 1.8v vin(dc)=vout typ +1.5v f=100hz 1mhz 200mvp-p vripple vin vout vcont np 1.0 f ! cnp=0.00 1 f, 0.01 f, 0.1 f ! iout=10ma, 20ma, 50ma, 100ma ! r.r vs iout : frequency=1khz ! r.r vs low vin : frequency=1khz -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0 20406080100 iout (ma) ripple rejection (db) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0 0.2 0.4 0.6 0.8 1 vin-vout (t y p ) (v) ripple rejection (db) iout=100ma iout=50ma iout=20ma iout=10ma iout=1ma the ripple rejection (r.r) characteristic depends on the characteristic and the capacitance of the capacitor connected at the output side. also it depends on the output voltage. the r . r characteristic at 50khz or more varies greatly with the capacitor on the output side and pcb pattern. if necessary, please check stability during operation. cout=0.22 f 0.47 f 1.0 f 2.2 f cnp=0.001 f cnp=0.01 f 0.1 f iout=100ma 50ma 20ma 10ma
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 16 on/off transient test conditions rise time vout 95% vcont vout time voltage cnp cout 1.0 f iout=30ma cin 1.0 f vin =vout typ +1v vcont=0v ? 2v (f=100hz) vin vout vcont np 0.001 f ! cout=0.47 f, 1.0 f, 2.2 f ! cout=0.47 f, 1.0 f, 2.2 f ! cnp=0.001 f, 0.01 f, 0.1 f the rise time of the regulator depends on cout and cnp. the fall time depends on cout.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 17 load transient test conditions cnp cout cin 1.0 f vcont 1.8v vin =vout typ +1v iout on ? off 0.001 f 1.0 f vin vout vcont np ! iout=0 ? 100ma, 5 ? 105ma ! iout=100ma ? 0ma, 105ma ? 5ma ! cout=0.47 f, 1.0 f, 2.2 f : iout=0ma ? 100ma ! cout=0.47 f, 1.0 f, 2.2 f : iout=100ma ? 0ma increase the load side capacitor when the load change is fast or when there is a large current change. in addition, at no load, supplying small load current to ground can reduce the voltage change.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 18 line transient ! cnp=0.001 f, 0.01 f, 0.1 f test conditions cnp cout 1.0 f iout=30ma vcont 1.8v vin =vout typ +1v ? +2v 0.001 f vin vout vcont np ! cout=0.1 f, 0.22 f, 0.47 f ! cout=1.0 f, 2.2 f
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 19 output noise characteristics ! vout vs noise test conditions 0 10 20 30 40 50 60 70 80 1.0 2.0 3.0 4.0 5.0 vout(typ) (v) noise (uvrms) cnp 0.01 f cout 1.0 f iout=30ma cin 1.0 f vcont 1.8v vin =vout typ +1v bpf=400hz 80khz vin vout vcont np ! cnp vs noise ! iout vs noise 0 50 100 150 200 250 300 1p 10p 100p 1000p 0.01u 0.1u cnp (f) noise (uvrms) cout=0.22uf cout=0.47uf cout=1.0uf cout=2.2uf 20 25 30 35 40 45 50 55 60 65 70 0 20406080100 iout (ma) noise (uvrms) cout=0.22uf cout=0.47uf cout=1.0uf cout=2.2uf increase cnp to decrease the noise. the recommended cnp capacitance is 0.01 f 0.1 f. the amount of noise increases with the higher output voltages.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 20 12. pin description pin no. pin description internal equivalent circuit description tk705xxs : 1 tk707xxs : 3 tk706xxh : 1 tk708xxh : 3 vcont vcont 320k ? 500k ? on/off control terminal v cont > 1.8v : on v cont < 0.35v : off the pull-down resister (500k ? ) is built-in. tk705xxs : 2 tk707xxs : 2 tk706xxh : 2,5 tk708xxh : 2,5 gnd gnd terminal tk705xxs : 3 tk707xxs : 4 tk706xxh : 3 tk708xxh : 4 np np noise bypass terminal connect a bypass capacitor between gnd. tk705xxs : 4 tk707xxs : 5 tk706xxh : 4 tk708xxh : 6 vout vout vin vref output terminal tk705xxs : 5 tk707xxs : 1 tk706xxh : 6 tk708xxh : 1 vin input terminal
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 21 13. applications information 13-1. definition of technical terms relating characteristic note each characteristics will be measured in a short period not to be influenced by joint temperature (tj). ? ? ? ? output voltage (vout) the output voltage is specified with vin= vout typ +1v and iout=5ma ? ? ? ? output current (iout) output current, which can be used continuously (it is the range where overheating protection of the ic does not operate.) ? ? ? ? peak maximum output current (iout peak ) the rated output current is specified under the condition where the output voltage drops 90% by increasing the output current, compared to the value specified at vin=vout typ +1v. ? ? ? ? dropout voltage (vdrop) it is an i/o voltage difference when the circuit stops the stable operation by decreasing the input voltage. it is measured when the output voltage drops 100mv from its nominal value by decreasing the input voltage gradually. ? ? ? ? line regulation (linreg) it is the fluctuations of the output voltage value when the input voltage is changed. ? ? ? ? load regulation (loareg) it is the fluctuations of the output voltage value when the input voltage is assumed to be vout typ +1v, and the load current is changed. ? ? ? ? ripple rejection (r.r) ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. it is measured with the condition of vin=vout+1.5v. ripple rejection is the ratio of the ripple content between the output vs. input and is expressed in db. ? ? ? ? standby current (istandby) it is an input current, which flows to the control terminal, when the ic is turned off. relating protection circuit ? ? ? ? over current protection it is a function to protect the ic by limiting the output current when excessive current flows to ic, such as the output is connected to gnd, etc. ? ? ? ? thermal protection it protects the ic not to exceed the permissible power consumption of the package in case of large power loss inside the regulator. the output is turned off when the chip reaches around 140 c , but it turns on again when the temperature of the chip decreases. ? ? ? ? reverse voltage protection reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. this fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side generally, a ldo regulator has a diode in the input direction from an output. if an input falls from an output in an input-gnd short circuit etc. and this diode turns on, current will flow for an input terminal from an output terminal. in the case of excessive current, ic may break. in order to prevent this, it is necessary to connect an schottky diode etc. outside. this product is equipped with reverse bias over-current prevention, and excessive current does not flow in to ic. therefore, no need to connect diode outside. vin vout ? ? ? ? esd it is tested by connecting charged capacitor to gnd pin and vin pin. mm 200pf 0 ? 200vmin hbm 100pf 1.5k ? 2000vmin
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 22 13-2. esr stability linear regulators require input and output capacitors in order to maintain the regulator's loop stability. if 0.22 f or larger capacitor is connected to the output side, the ic provides stable operation at any voltage (1.3v vout typ 5.0v). (the capacitor must be larger then 0.22 f at all temperature and voltage range) if the capacitor with high equivalent series resistance (esr) (several ohms) is used, such as tantalum capacitor etc., the regulator may oscillate. please select parts with low esr. due to the parts are uneven, please enlarge the capacitance as much as possible. with larger capacity, the output noise decreases more. in addition, the response to the load change, etc. can be improved. the ic won?t be damaged by enlarging the capacity. a recommended value of the application is as follows. cin=cout 0.47 f ceramic capacitance fig.13-1 tk705xxs tk707xxs tk706xxh tk708xxh cin 0.47 f vin vout cout 0.47 f cnp 0.001 f gnd fig.13-2 output voltage, output current vs.stable operation area cout=0.1 f cout=0.22 f 0.01 0.1 1 10 100 0 20406080100 iout (ma) esr ( ) s table area unstable area unstable area 0.01 0.1 1 10 100 0 20406080100 iout (ma) esr ( ) s table area unstable area 1.5v vout typ 5.0v fig.13-2 shows stable operation with a ceramic capacitor of 0.22 f. since it may oscillate if esr is large, we recommend using ceramic capacitor. the stability of the regulator improves with larger output capacitor (the stable operation area extends.) please use the capacitor with larger capacitance as possible. for evaluation kyocera: cm05b104k10ab, cm05b224k10ab, cm105b104k16a, cm105b224k16a, cm21b225k10a murata: grm36b104k10, grm42b104k10, grm39b104k25, grm39b224k10, grm39b105k6.3 the input capacitor is necessary in case the battery voltage drops, the power supply impedance increases, or the distance to the power supply is far. 1 input capacitor might be necessary for each ic or for several ics. it depends on circuit condition. please confirm the stability by each circuit. fig.13-3 ex. ceramic capacitance vs. voltage, temperature generally, a ceramic capacitor has both temperature characteristic and voltage characteristic. please consider both characteristics when selecting the part. the b curves are the recommend characteristics.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 23 13-3. operating region and power dissipation the power dissipation of the device depends on the junction temperature. therefore, the package dissipation is assumed to be an internal limitation. the package itself does not have enough heat radiation characteristic due to the small size. heat runs away by mounting ic on pcb. this value changes by the material, copper pattern etc. of pcb. the overheating protection operates when there is a lot of loss inside the regulator (ambient temperature high, heat radiation bad, etc.). the output current and the output voltage will drop when the protection circuit operates. when joint temperature (tj) reaches the set temperature, ic stops the operation. however, operation begins at once when joint temperature (tj) decreases. the thermal resistance when mounted on pcb the chip joint temperature during operation is shown by tj= japd+ta. joint part temperature (tj) of tk705xxs/tk707xxs/tk706xxh/tk708xxh is limited around 140 c with the overheating protection circuit. pd is the value when the overheating protection circuit starts operation. when you assume the ambient temperature to be 25 c, 140= ja pd(w)+25 ja pd=115 ja=115/pd ( c /w) example of mounting substrate pcb material: two layer glass epoxy substrate (x=30mm,y=30mm,t=1.0mm,copper pattern thickness 35um) tk705xxs/tk707xxs (sot23-5) please do the derating with 5.9mw/ c at pd=677mw and 25 c or higher. thermal resistance ( ja) is 170 c/w. tk706xxh/tk708xxh (son2017-6) please do the derating with 4.9mw/ c at pd=560mw and 25 c or higher. thermal resistance ( ja) is 205 c/w. method of obtaining pd easily connect output terminal to gnd(short circuited), and measure the input current by increasing the input voltage gradually up to 10v. the input current will reach the maximum output current, but will decrease soon according to the chip temperature rising, and will finally enter the state of thermal equilibrium (natural air cooling). the input current and the input voltage of this state will be used to calculate the pd. pd(mw) ? vin (v) iin (ma) when the device is mounted, mostly achieve tk705xxs/tk707xxs (sot23-5): 580mw or more tk706xxh/tk708xxh (son2017-6): 500mw or more * in case that the power, vin ishort(short circuit current), becomes more than the maximum rating of its power dissipation, the ic may damaged before internal thermal protection works. 25 50 100 pd(mw) 140 c pd 0 0 75 c ta(c) 2 3 4 d pd 5 procedure (when mounted on pcb). 1.find pd (vin iin when the output is short-circuited). 2. plot pd against 25 c. 3. connect pd to the point corresponding to the 140 c with a straight line. 4. pull a vertical line from the maximum operating temperature in your design (e.g., 75 c). 5. read the value of pd against the point at which the vertical line intersects the derating curve(dpd). 6.dpd (vinmax-vout)=iout (at 75 c) the maximum output current at the highest operating temperature will be iout ? ? ? ? dpd (vinmax-vout). please use the device at low temperature with better radiation. the lower temperature provides better quality.
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 24 13-4. on/off control it is recommended to turn the regulator off when the circuit following the regulator is not operating. a design with small electric power loss can be implemented. because the control current is small, it is possible to control it directly by cmos logic. control terminal voltage (vcont) on/off state vcont > 1.8v on vcont < 0.35v off parallel connected on/off control fig.13-4 fig.13-4 shows the multiple regulators being controlled by a single on/off control signal. there is fear of overheating, because the power loss of the low voltage side (tk70520s) is large. the series resistor (r) is put in the input line of the low output voltage regulator in order to prevent over-dissipation. the voltage dropped across the resistor reduces the large input-to-output voltage across the regulator, reducing the power dissipation in the device. when the thermal sensor works, a decrease of the output voltage, oscillation, etc. may be observed. 13-5. noise bypass the noise characteristics depend on the capacitance on the np terminal. a standard value is cnp=0.001 f. increase cnp in a design with important output noise requirements. the ic will not be damaged even the capacitor value is increased. the on/off switching speed changes depending on the np terminal capacitance. the switching speed slows when the capacitance is large. 13-6. the notes of the evaluation when output terminal is short-circuit to gnd by the resonance phenomenon by cout (c ingredient) and the short circuit line (l ingredient), which are attached to an output terminal, an output terminal changes with minus potential. in order that parasitism tr arises within bip ic, and a latch rise phenomenon may occur within ic when the worst if it goes into an output terminal's minus side, it results in damage by fire (white smoke) and breakage of a package. (f 0 = 1 / 2 (l c)) the above-mentioned resonance phenomenon appears notably in a ceramic capacitor with the small esr value, etc. a resonance phenomenon can be reduced by connecting resistance (around 2ohms or more) in series with a short circuit line. thereby, the latch rise phenomenon within ic can be prevented. generally, when using tantalum or large electrolysis capacitor, the influence of resonance phenomenon can be reduced due to the large esr (2ohms or more). 2.0v 5v 3.3v on/off cont. vin tk70550s r tk70533s tk70520s vout
tk705xxs/tk707xxs,tk706xxh/tk708xxh gc3-k028a page 25 14. notes ! please be sure that you carefully discuss your planned purchase with our office if you intend to use the products in this application manual under conditions where particularly extreme standards of reliability are required, or if you intend to use products for applications other than those listed in this application manual. " power drive products for automobile, ship or aircraft transport systems; steering and navigation systems, emergency signal communications systems, and any system other than those mentioned above which include electronic sensors, measuring, or display devices, and which could cause major damage to life, limb or property if misused or failure to function. " medical devices for measuring blood pressure, pulse, etc., treatment units such as coronary pacemakers and heat treatment units, and devices such as artificial organs and artificial limb systems which augment physiological functions. " electrical instruments, equipment or systems used in disaster or crime prevention. ! semiconductors, by nature, may fail or malfunction in spite of our devotion to improve product quality and reliability. we urge you to take every possible precaution against physical injuries, fire or other damages which may cause failure of our semiconductor products by taking appropriate measures, including a reasonable safety margin, malfunction preventive practices and fire-proofing when designing your products. ! this application manual is effective from aug. 2005. note that the contents are subject to change or discontinuation without notice. when placing orders, please confirm specifications and delivery condition in writing. ! toko is not responsible for any problems nor for any infringement of third party patents or any other intellectual property rights that may arise from the use or method of use of the products listed in this application manual. moreover, this application manual does not signify that toko agrees implicitly or explicitly to license any patent rights or other intellectual property rights which it holds. ! none of the ozone depleting substances(ods) under the montreal protocol are used in our manufacturing process. 15. offices if you need more information on this product and other toko products, please contact us. ! toko inc. headquarters 1-17, higashi-yukigaya 2-chome, ohta-ku, tokyo, 145-8585, japan tel: +81.3.3727.1161 fax: +81.3.3727.1176 or +81.3.3727.1169 web site: http://www.toko.co.jp/ ! toko america web site: http://www.toko.com/ ! toko europe web site: http://www.tokoeurope.com/ ! toko hong kong web site: http://www.toko.com.hk/ ! toko taiwan web site: http://www.tokohc.com.tw/ ! toko singapore web site: http://www.toko.com.sg/ ! toko seoul web site: http://www.toko.co.kr/ ! toko manila web site: http://www.toko.com.ph/ ! toko brazil web site: http://www.toko.com.br/ semiconductor division your distributor

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