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january 2002 toko, inc. page 1 TK112XXCM high precision voltage at 1.5% or 50 mv active high on/off control very low dropout voltage: (v drop = 105 mv at 100 ma) very good stability: cl = 0.1 f is stable for any type capacitor with v out 1.8 v (i out > 0.5 ma) excellent ripple rejection ratio (80 db @ 1 khz) very low quiescent current (i q = 65 a at i out = 0 ma) peak output current is 480 ma sot23l-6 surface mount package very low noise built-in reverse bias protection internal thermal shutdown short circuit protection block diagram tk112xxc voltage regulator with on/off switch features applications battery powered systems cellular telephones pagers personal communications equipment portable instrumentation portable consumer equipment radio control systems toys low voltage systems description the tk112xxc is a low dropout linear regulator with a built- in electronic switch. the internal switch can be controlled by ttl or cmos logic levels. the device is in the ?on? state when the control pin is pulled to a logic high level. an external capacitor can be connected to the noise bypass pin to lower the output noise level to 30 vrms. an internal pnp pass transistor is used to achieve a low dropout voltage of 170 mv (typ.) at 200 ma load current. the tk112xxc has a very low quiescent current of 65 a at no load and 1.8 ma with a 100 ma load.the internal thermal shut down circuitry limits the junction temperature to150 c. the load current is internally monitored and the device will shut down in the presence of a short circuit or overcurrent condition at the output. 0 1 s the TK112XXCM circuit features very high stability in both dc and ac. an output capacitor of 0.1 f provides stable operation for v out 2.5 v. any type of capacitor can be used; however, the larger this capacitor is, the better the overall characteristics are. the ripple rejection ratio is 84 db at 400 hz, and 80 db at 1 khz. the tk112xxc is available in the sot23l-6 surface mount package. noise bypass v in v out control gnd control circuit constant current source bandgap reference thermal protection gnd control v out v in noise bypass gnd ordering information tape/reel code: l: tape left reel size = 1300 pcs. temp. code: c: -30 to +80c i: -40 to +85c tape/reel code tk112 cm voltage code package code package code: m: sot23l-6 temp. code voltage code: refer totable 1
page 2 january 2002 toko, inc. TK112XXCM supply v oltage ......................................................... 16 v power dissipation sot- 23l (note1) ................... 600 mw reverse bias ............................................................. 6 v storage temperature range ..................... -55 to +150 c operating temperature range ..................... -30 to +80 c operating voltage range ............................ 1.8 to 14.5 v junction temperature ........................................... 150 c absolute maximum ratings TK112XXCM - c rank TK112XXCM electrical characteristics - c rank test conditions: t a = 25 c, v in = v out(typ) + 1v, v cont = 1.8 v, unless otherwise specified. l o b m y sr e t e m a r a ps n o i t i d n o c t s e tn i mp y tx a ms t i n u v t u o e g a t l o v t u p t u oi t u o ) 1 e l b a t e e s ( a m 5 =v m 0 5 r o % 5 . 1 g e r e n i ln o i t a l u g e r e n i l v ( v 5 = v n i v = ) p y t ( t u o o t v 1 + v ) p y t ( t u o ) v 6 + 06 v m g e r d a o l n o i t a l u g e r d a o l v 5 . 2 v t u o v 0 . 5 i t u o a m 0 0 1 o t a m 5 =5 . 01 . 1% i t u o a m 0 0 2 o t a m 5 =0 . 12 . 2% i t u o a m 0 0 3 o t a m 5 =6 . 17 . 3% g e r d a o l n o i t a l u g e r d a o l v 5 . 1 v t u o v 4 . 2 i t u o a m 0 0 1 o t a m 5 =8 . 08 . 1% i t u o a m 0 0 2 o t a m 5 =5 . 14 . 3% i t u o a m 0 0 3 o t a m 5 =4 . 23 . 5% v p o r d e g a t l o v t u o p o r d ) 2 e t o n ( i t u o a m 0 0 1 =5 0 10 7 1v m i t u o a m 0 0 2 =0 7 10 7 2v m i t u o v ( a m 0 0 3 = t u o ) v 4 . 25 3 20 7 3v m i t u o x a mt n e r r u c t u p t u o m u m i x a mv t u o v = ) p y t ( t u o 9 . 0 x0 8 30 8 4a m i q t n e r r u c t n e c s e i u qi t u o i g n i d u l c x e a m 0 = t n o c 5 60 9 a i y b t s t n e r r u c y b d n a t sv c c v , v 8 = t n o c e t a t s f f o v 5 1 . 001 . 0 a i d n g t n e r r u c n i p d n u o r gi t u o a m 0 0 1 =8 . 10 . 3a m ) 3 e t o n ( n o i t a c i f i c e p s l a n i m r e t l o r t n o c i t n o c t n e r r u c l o r t n o cv t n o c e t a t s n o , v 8 . 1 =50 1 a v t n o c e g a t l o v l o r t n o c e t a t s n o6 . 1v e t a t s f f o6 . 0v
january 2002 toko, inc. page 3 TK112XXCM note 1: power dissipation is 600 mw when mounted as recommended. decrease at the rate of 4.8 mw/c for operation above 25 c. note 2: the minimum operating voltage for v in can be 1.8 v. also, the minimum voltage required for v in is v in = v drop + v out . as a result, operating at v out 2.0 v at the minimum input operating voltage is not preferred. note 3: the input current decreases to the pa level by connecting the control terminal to gnd. (off state). the internal pull-down resi stor is 500 k . general note: parameters with only typical values are just reference. (not guaranteed) general note: limits are guaranteed by production testing or correction techniques using statistical quality control (sqc) meth ods. unless otherwise noted. v in = v out(typ) + 1 v; i out = 1ma (tj = 25 c) the operation of -30c to 80c is guaranteed in the design by a usual inspection. general note: exceeding the ?absolute maximum rating? may damage the device. general note: connecting a capacitor to the noise bypass pin can decrease the output noise voltage. l o b m y sr e t e m a r a ps n o i t i d n o c t s e tn i mp y tx a ms t i n u v f e r l a n i m r e t s s a p y b e s i o n e g a t l o v 8 2 . 1v v t u o t a t n e i c i f f e o c e r u t a r e p m e t 5 3c / m p p v o n e s i o n t u p t u o v t u o c , z h k 1 = f , v 3 = n 1 . 0 = f0 2 . 0 / v z h v t u o z h k 0 8 o t z h 0 0 4 w b t a , v 3 =5 4 v s m r r rn o i t c e j e r e l p p i r 0 . 1 = l c , z h 0 0 4 = f c , f n 1 0 . 0 = v , f e s i o n v m 0 0 2 = s m r v , n i v = ) p y t ( t u o i , v 5 . 1 + t u o a m 0 1 = 4 8b d 0 . 1 = l c , z h k 1 = f c , f n 1 0 . 0 = , f v e s i o n v m 0 0 2 = s m r v , n i v = ) p y t ( t u o + i , v 5 . 1 t u o a m 0 1 = 0 8b d TK112XXCM electrical characteristics - c rank (cont) test conditions: t a = 25 c, v in = v out(typ) + 1v, v cont = 1.8 v, unless otherwise specified.
page 4 january 2002 toko, inc. TK112XXCM supply v oltage ......................................................... 16 v power dissipation sot- 23l (note1) ................... 600 mw reverse bias ............................................................. 6 v storage temperature range ..................... -55 to +150 c absolute maximum ratings TK112XXCM - i rank TK112XXCM electrical characteristics - i rank test conditions: t a = 25 c, v in = v out (typ) + 1v, i out = 5 ma, unless otherwise specified. boldface type applies over the full operating temperature range. (-40~85c). l o b m y sr e t e m a r a ps n o i t i d n o c t s e tn i mp y tx a ms t i n u v t u o e g a t l o v t u p t u oi t u o ) 1 e l b a t e e s ( a m 5 = v m 0 5 r o % 5 . 1 ) v m 0 8 r o % 5 . 2 ( g e r e n i ln o i t a l u g e r e n i l v ( , v 5 = v n i v = ) p y t ( t u o o t v 1 + v ) p y t ( t u o ) v 6 + 0 6 8 v m g e r d a o l n o i t a l u g e r d a o l v 5 . 2 v t u o v 0 . 5 i t u o a m 0 0 1 o t a m 5 =5 . 0 1 . 1 3 . 1 % i t u o a m 0 0 2 o t a m 5 =0 . 1 2 . 2 8 . 2 % i t u o a m 0 0 3 o t a m 5 =6 . 1 7 . 3 3 . 5 % g e r d a o l n o i t a l u g e r d a o l v 5 . 1 v t u o v 4 . 2 i t u o a m 0 0 1 o t a m 5 =8 . 0 8 . 1 0 . 2 % i t u o a m 0 0 2 o t a m 5 =5 . 1 4 . 3 1 . 4 % i t u o a m 0 0 3 o t a m 5 =4 . 2 3 . 5 5 . 6 % v p o r d e g a t l o v t u o p o r d ) 2 e t o n ( i t u o a m 0 0 1 =5 0 1 0 7 1 0 0 2 v m i t u o a m 0 0 2 =0 7 1 0 7 2 0 2 3 v m i t u o v ( a m 0 0 3 = t u o ) v 4 . 25 3 2 0 7 3 0 4 4 v m i t u o x a mt n e r r u c t u p t u o m u m i x a mv t u o v = ) p y t ( t u o 9 . 0 x 0 8 3 0 4 3 0 8 4a m i q t n e r r u c t n e c s e i u qi t u o i g n i d u l c x e a m 0 = t n o c 5 6 0 9 0 0 1 a i y b t s t n e r r u c y b d n a t sv t n o c e t a t s f f o v 5 1 . 00 1 . 0 5 . 0 a i d n g t n e r r u c n i p d n u o r gi t u o a m 0 0 1 =8 . 1 0 . 3 6 . 3 a m operating temperature range ..................... -40 to +85 c operating voltage range ............................ 2.1 to 14.5 v junction temperature ........................................... 150 c
january 2002 toko, inc. page 5 TK112XXCM TK112XXCM electrical characteristics - i rank (cont) test conditions: t a = 25 c, v in = v out (typ) + 1v, i out = 5 ma, unless otherwise specified. boldface type applies over the full operating temperature range. (-40~85c). l o b m y sr e t e m a r a ps n o i t i d n o c t s e tn i mp y tx a ms t i n u ) 3 e t o n ( n o i t a c i f i c e p s l a n i m r e t l o r t n o c i t n o c t n e r r u c l o r t n o cv t n o c e t a t s n o , v 8 . 1 =5 0 1 2 1 a m v t n o c e g a t l o v l o r t n o c e t a t s n o 6 . 1 8 . 1 v e t a t s f f o 6 . 0 5 3 . 0 v v f e r l a n i m r e t s s a p y b e s i o n e g a t l o v 8 2 . 1v v t u o / t a t n e i c i f f e o c e r u t a r e p m e t 5 3c / m p p v o n e s i o n t u p t u o v t u o c , z h k 1 = f , v 3 = n 1 . 0 = f0 2 . 0 / v z h v t u o z h k 0 8 o t z h 0 0 4 w b t a , v 3 =5 4 v s m r r rn o i t c e j e r e l p p i r 0 . 1 = l c , z h 0 0 4 = f c , f n 1 0 . 0 = v , f e s i o n v m 0 0 2 = s m r v , n i v = ) p y t ( t u o i , v 5 . 1 + t u o a m 0 1 = 4 8b d 0 . 1 = l c , z h k 1 = f c , f n 1 0 . 0 = , f v e s i o n v m 0 0 2 = s m r v , n i v = ) p y t ( t u o + i , v 5 . 1 t u o a m 0 1 = 0 8b d note 1: power dissipation is 600 mw when mounted as recommended. decrease at the rate of 4.8 mw/c for operation above 25 c. note 2: the minimum operating voltage for v in can be 1.8 v. also, the minimum voltage required for v in is v in = v drop + v out . as a result, operating at v out 2.0 v at the minimum input operating voltage is not preferred. note 3: the input current decreases to the pa level by connecting the control terminal to gnd. (off state). the internal pull-down resi stor is 500 k . general note: parameters with only typical values are just reference. (not guaranteed) general note: limits are guaranteed by production testing or correction techniques using statistical quality control (sqc) meth ods. unless otherwise noted. v in = v out(typ) + 1 v; i out = 1ma (tj = 25 c) the operation of -30c to 80c is guaranteed in the design by a usual inspection. general note: exceeding the ?absolute maximum rating? may damage the device. general note: connecting a capacitor to the noise bypass pin can decrease the output noise voltage.
page 6 january 2002 toko, inc. TK112XXCM TK112XXCM electrical characteristics table 1 test conditions: v in = v out(typ) + 1 v, i out = 5 ma, unless otherwise specified. . c e p s . e g n a r . p m e t d e d n e t x e . c e p s e g n a r . p m e t d r a d n a t s t ( p m e t m o o r a t ( p m e t l l u f ) c 5 2 = a ) c 5 8 o t 0 4 - = y t i l i b a l i a v a t u p t u o e g a t l o v e g a t l o v e d o c v t u o n i mv t u o x a mv t u o n i mv t u o x a m * v 5 . 15 1v 0 5 4 . 1v 0 5 5 . 1v 0 2 4 . 1v 0 8 5 . 1 v 6 . 16 1v 0 5 5 . 1v 0 5 6 . 1v 0 2 5 . 1v 0 8 6 . 1 v 7 . 17 1v 0 5 6 . 1v 0 5 7 . 1v 0 2 6 . 1v 0 8 7 . 1 * v 8 . 18 1v 0 5 7 . 1v 0 5 8 . 1v 0 2 7 . 1v 0 8 8 . 1 * v 9 . 19 1v 0 5 8 . 1v 0 5 9 . 1v 0 2 8 . 1v 0 8 9 . 1 * v 0 . 20 2v 0 5 9 . 1v 0 5 0 . 2v 0 2 9 . 1v 0 8 0 . 2 v 1 . 21 2v 0 5 0 . 2v 0 5 1 . 2v 0 2 0 . 2v 0 8 1 . 2 * v 2 . 22 2v 0 5 1 . 2v 0 5 2 . 2v 0 2 1 . 2v 0 8 2 . 2 v 3 . 23 2v 0 5 2 . 2v 0 5 3 . 2v 0 2 2 . 2v 0 8 3 . 2 v 4 . 24 2v 0 5 3 . 2v 0 5 4 . 2v 0 2 3 . 2v 0 8 4 . 2 * v 5 . 25 2v 0 5 4 . 2v 0 5 5 . 2v 0 2 4 . 2v 0 8 5 . 2 v 6 . 26 2v 0 5 5 . 2v 0 5 6 . 2v 0 2 5 . 2v 0 8 6 . 2 * v 7 . 27 2v 0 5 6 . 2v 0 5 7 . 2v 0 2 6 . 2v 0 8 7 . 2 * v 8 . 28 2v 0 5 7 . 2v 0 5 8 . 2v 0 2 7 . 2v 0 8 8 . 2 * v 9 . 29 2v 0 5 8 . 2v 0 5 9 . 2v 0 2 8 . 2v 0 8 9 . 2 * v 0 . 30 3v 0 5 9 . 2v 0 5 0 . 3v 0 2 9 . 2v 0 8 0 . 3 * v 1 . 31 3v 0 5 0 . 3v 0 5 1 . 3v 0 2 0 . 3v 0 8 1 . 3 * v 2 . 32 3v 0 5 1 . 3v 0 5 2 . 3v 0 2 1 . 3v 0 8 2 . 3 * v 3 . 33 3v 0 5 2 . 3v 0 5 3 . 3v 7 1 2 . 3v 3 8 3 . 3 v 4 . 34 3v 9 4 3 . 3v 1 5 4 . 3v 5 1 3 . 3v 5 8 4 . 3 * v 5 . 35 3v 7 4 4 . 3v 3 5 5 . 3v 2 1 4 . 3v 8 8 5 . 3 note: * denotes voltage presently available. consult factory for availability of other voltages.
january 2002 toko, inc. page 7 TK112XXCM . c e p s . e g n a r . p m e t d e d n e t x e . c e p s e g n a r . p m e t d r a d n a t s t ( p m e t m o o r a t ( p m e t l l u f ) c 5 2 = a ) c 5 8 o t 0 4 - = y t i l i b a l i a v a t u p t u o e g a t l o v e g a t l o v e d o c v t u o n i mv t u o x a mv t u o n i mv t u o x a m * v 6 . 36 3v 6 4 5 . 3v 4 5 6 . 3v 0 1 5 . 3v 0 9 6 . 3 v 7 . 37 3v 4 4 6 . 3v 6 5 7 . 3v 7 0 6 . 3v 3 9 7 . 3 * v 8 . 38 3v 3 4 7 . 3v 7 5 8 . 3v 5 0 7 . 3v 5 9 8 . 3 v 9 . 39 3v 1 4 8 . 3v 9 5 9 . 3v 2 0 8 . 3v 8 9 9 . 3 * v 0 . 40 4v 0 4 9 . 3v 0 6 0 . 4v 0 0 9 . 3v 0 0 1 . 4 v 1 . 41 4v 8 3 0 . 4v 2 6 1 . 4v 7 9 9 . 3v 3 0 2 . 4 v 2 . 42 4v 7 3 1 . 4v 3 6 2 . 4v 5 9 0 . 4v 5 0 3 . 4 v 3 . 43 4v 5 3 2 . 4v 5 6 3 . 4v 2 9 1 . 4v 8 0 4 . 4 v 4 . 44 4v 4 3 3 . 4v 6 6 4 . 4v 0 9 2 . 4v 0 1 5 . 4 * v 5 . 45 4v 2 3 4 . 4v 8 6 5 . 4v 7 8 3 . 4v 3 1 6 . 4 v 6 . 46 4v 1 3 5 . 4v 9 6 6 . 4v 5 8 4 . 4v 5 1 7 . 4 * v 7 . 47 4v 9 2 6 . 4v 1 7 7 . 4v 2 8 5 . 4v 8 1 8 . 4 v 8 . 48 4v 8 2 7 . 4v 2 7 8 . 4v 0 8 6 . 4v 0 2 9 . 4 v 9 . 49 4v 6 2 8 . 4v 4 7 9 . 4v 7 7 7 . 4v 3 2 0 . 5 * v 0 . 50 5v 5 2 9 . 4v 5 7 0 . 5v 5 7 8 . 4v 5 2 1 . 5 TK112XXCM electrical characteristics table 1 (cont) test conditions: v in = v out(typ) + 1 v, i out = 5 ma, unless otherwise specified. note: * denotes voltage presently available. consult factory for availability of other voltages.
page 8 january 2002 toko, inc. TK112XXCM typical performance characteristics t a = 25 c, unless otherwise specified. test circuit output noise tk11230 cn vs. noise i out = 30 ma bpf = 400 hz ~ 80 khz v cont i cont i out c l = 0.22 f ( c l = 1.0 f) c n = 0.1 f gnd cntl v out v in noise bypass gnd c in = 0.1 f i in a a v in tk11230c i out vs. noise 90 85 80 75 70 65 60 55 50 0 50 100 150 200 250 300 i out (ma) noise( v rms ) cl = 0.22 f cl = 0.47 f cl = 1.0 f cl = 2.2 f cl = 10 f 95 45 40 35 cn = 10000 pf bpf: 400 ~ 80 khz cl = mlcc cl = mlcc cl = tantalum i out = 30 ma bpf:400 ~ 80 khz cl = 0.22 f cl = 0.47 f cl = 1.0 f cl = 2.2 f cl = 10 f 1 10 100 1k 10k 100k 300 250 200 150 100 50 0 tk11230c c n vs. noise noise ( v rms ) c n (pf) tk112xxc v out vs. noise 90 80 70 60 50 40 30 20 10 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v out (v) noise( v rms ) i out = 30 ma c n = 10000 pf cl = 0.22 f (mlcc) bpf: 400 ~ 80 khz tk11230c i out vs. noise 90 85 80 75 70 65 60 55 50 0 50 100 150 200 250 300 i out (ma) noise( v rms ) cl = 0.22 f cl = 0.47 f cl = 1.0 f cl = 2.2 f cl = 10 f 95 45 40 35 cn = 10000 pf bpf: 400 ~ 80 khz cl = tantalum 10 100 1k 10k 100k 10 1 0.1 0.01 noise level (1/f) noise ( v / hz) frequency (hz) c n = 1000 pf c n = 0.01 f c n = 0.1 f c in = 10 f i out = 10 ma cl = 0.22 f (mlcc)
january 2002 toko, inc. page 9 TK112XXCM typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. ripple rejection cl = 1 f (mlcc) cl = 1 f (tantalum) 0.1 1 10 100 1000 0 -10 -20 -50 -100 -30 -40 -60 -70 -80 -90 rr(db) frequency(khz) c n = 0.1 f c n = 0.001 f 0.1 1 10 100 1000 0 -10 -20 -50 -100 -30 -40 -60 -70 -80 -90 rr(db) frequency(khz) 0.1 1 10 100 1000 cl = 0.22 f (tantalum) 0 -10 -20 -50 -100 frequency (khz) rr(db) cl = 0.22 f (mlcc) -30 -40 -60 -70 -80 -90 cl = 10 f (tantalum) cl = 0.22 f (tantalum) 0.1 1 10 100 1000 0 -10 -20 -50 -100 -30 -40 -60 -70 -80 -90 rr(db) frequency(khz) 0 50 100 150 200 250 300 0 -10 -20 -30 -40 -50 -60 -80 -90 -100 -70 i out (ma) r.r.(db) ripple rejection vs. i out freq = 1 khz freq = 400 hz c n = 0.01 f cl = 0.22 f (mlcc) v in = 5.0 v v ripple = 500 mvp-p 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 -10 -20 -30 -40 -50 -60 -80 -90 -100 -70 v in -v out _typ(v) r.r.(db) ripple rejection at low v in c in : none, v ripple = 100 mvp-p freq: 1khz c n : 0.01 f cl: 0.22 f (mlcc) i out : 1, 50, 100, 150, 200, 250, 300 ma i out = 1 ma i out = 300 ma c n 0.1 f v in v out v cont cl gnd 112xx gnd 500 mvp-p input wave form v in v in = 5.0 v v out = 3.0 v i out = 10 ma v ripple = 500 mvp-p f = 100 to 1 mhz c n =0.1 f c in = 0 f
page 10 january 2002 toko, inc. TK112XXCM * on / off transient TK112XXCM transient the rise time of the regulator depends on cl and c n ; the fall time depends on cl. typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. c n 0.01 f v in = 4.0v i out = 30 ma c in = 1.0 f cl gnd 112xx cl = variable c n = 0.001 f v cont v out on off cl = 2.2 f cl = 1.0 f cl = 0.22 f 1.0 v/div 10 s/div 2.0 v/div 10 s/div cl = variable c n = 0.01 f v cont v out on off cl = 0.22 f 1.0 v/div 50 s/div 2.0 v/div 50 s/div cl = 2.2 f cl = 1.0 f cl = variable c n = 1 f v cont v out on off c n = 0.001 f 1.0 v/div 250 s/div 2.0 v/div 250 s/div c n = 0.1 f c n = 0.1 f cl = variable c n = 0.01 f i out = 30 ma v cont v out on off cl = 0.22 f 1.0 v/div 250 s/div 2.0 v/div 250 s/div cl = 2.2 f cl = 1.0 f
january 2002 toko, inc. page 11 TK112XXCM * load transient the no load voltage change can be greatly improved by delivering a little load current to ground (see right curve above) increase the load side capacitor when the load change is fast or when there is a large current change. in addition, at no load, the voltage change can be reduced by delivering a little load current to ground. when the capacitor on the load side is increased, the load change becomes smaller. typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. * line transient i out = 0 to 30 ma, i out = 3 to 33 ma i ou t i out = 0 to 30 ma step i out = 3 to 33 ma step 200 mv/div 1 ms/div v ou t v ou t magnification i out = 0 to 30 ma step i out = 0 to 33 ma step v out v out i out 200 mv/div 1 s/div cl = variable c n = 0.01 f v out v in c n = 2.2 f c n = 0.22 f c n = 1.0 f 1 v/div 100 s/div v out v out 10 mv/div 100 s/div cl = variable cn = 0.01 f v out v in c n = 0.1 f c n = 0.001 f c n = 0.01 f 10 mv/div 100 s/div v out v out c n 0.01 f v in = 4.0v i out = 30 ma c in = 1.0 f cl gnd 112xx v cont = 2.0 v cl = variable c n = 0.01 f i ou t v out cl = 2.2 f cl = 1.0 f cl = 0.22 f 33 to 3 ma step 100 mv/div 10 s/div
page 12 january 2002 toko, inc. TK112XXCM typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. dropout voltage vs. output current 0 -50 -100 -150 -200 -300 -250 -350 -400 -450 -500 0 100 200 300 400 500 i out (ma) v drop (mv) control current vs. control voltage 20 15 10 5 0 0.0 1.0 2.0 3.0 4.0 5.0 v cont (v) i cont ( a) i cont v out line regulation 15 10 5 0 -5 -15 -10 -20 -25 -30 -35 0 5 10 15 20 v out 1.5 v v out 2.0 v v out 3.0 v v out 4.0 v v out 5.0 v v in (v) ? v out (mv) load regulation 10 0 -10 -20 -30 -40 0 50 100 150 200 250 300 i out (ma) ? v out (mv) -50 -60 -70 -80 v out = 5.0 v v out = 2.0 v v out = 3.0 v regulation point 100 0.0 -100 100 v in (mv) ? v out (mv) -200 -300 i out = 0 ma i out = 300 ma i out = 0 ma, 50 ma, 100 ma, 150 ma, 200 ma, 250 ma, 300 ma
january 2002 toko, inc. page 13 TK112XXCM typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. standby current 1, e-04 0 2 4 6 8 10 12 14 16 18 20 v in (v) i standby (a) 1, e-05 1, e-06 1, e-07 1, e-08 1, e-09 1, e-10 1, e-11 1, e-12 ground pin current vs. output current 12 11 10 9 8 6 7 5 4 3 0 0 50 100 150 200 250 300 i out (ma) i gnd (ma) 2 1 vo1.5 v vo2.0 v vo3.0 v vo4.0 v vo5.0 v maximum output current at low output voltage tk11215c to tk11224c 500 450 400 350 300 200 250 150 100 50 0 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 v in (v) i out max(ma) short circuit current 6.0 5.0 4.0 2.0 0.0 0 100 200 300 400 500 i out (ma) v out (v) 3.0 1.0 reverse bias current 60 50 40 20 0 0 1 2 3 4 5 6 7 8 9 10 v rev (v) i rev ( a) 30 10 v out = 3 v v out = 4 v v out = 2 v v out = 5 v
page 14 january 2002 toko, inc. TK112XXCM temperature characteristics typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. maximum output current vs. temperature 500 -50 -25 0 25 50 75 100 ta(c) i out (ma) 480 460 440 420 400 380 360 340 v out = (v out typ x 0.9) ground pin current vs. temperature 16.0 -50 -25 0 25 50 75 100 ta(c) i gnd (ma) 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 i out = 300 ma i out = 200 ma i out = 150 ma i out = 100 ma i out = 50 ma control current vs. temperature 18.0 16.0 14.0 12.0 10.0 8.0 -50 -25 0 25 50 75 100 t a (c) i cont ( a) 6.0 4.0 2.0 0.0 20.0 v cont = 3.0 v v cont = 2.0 v v cont = 1.8 v v cont = 4.0 v dropout voltage vs. temperature 350 -50 -25 0 25 50 75 100 ta(c) v drop (mv) 300 250 200 150 100 50 0 i out = 50 ma i out = 300 ma i out = 200 ma i out = 150 ma i out = 100 ma output current vs. temperature 550 -50 -25 0 25 50 75 100 ta(c) i out max(ma) 500 450 400 350 300 250 200 150 v in = 2.2 v v in = 2.1 v v in = 2.0 v v in = 1.9 v v in = 1.9/2.0//2.1/2.2/2.3/2.4/2.5v control on / off point vs. temperature 1.5 1.4 1.3 1.2 1.1 1.0 -50 -25 0 25 50 75 100 t a (c) v cont (v) 0.9 0.8 0.7 0.6 1.6 v cont (on point) v cont (off point)
january 2002 toko, inc. page 15 TK112XXCM output voltage vs. temperature characteristics v out = 5.0 v 15 10 5 0 -5 -10 -50 -25 0 25 50 75 100 t a (c) ? v out (mv) -15 -20 -25 -30 20 -35 typical performance characteristics (cont.) t a = 25 c, unless otherwise specified. v out = 1.5 v 15 10 5 0 -5 -10 -50 -25 0 25 50 75 100 t a (c) ? v out (mv) -15 -20 -25 -30 20 -35 v out = 2.0 v 15 10 5 0 -5 -10 -50 -25 0 25 50 75 100 t a (c) ? v out (mv) -15 -20 -25 -30 20 -35 v out = 3.0 v 15 10 5 0 -5 -10 -50 -25 0 25 50 75 100 t a (c) ? v out (mv) -15 -20 -25 -30 20 -35 v out = 4.0 v 15 10 5 0 -5 -10 -50 -25 0 25 50 75 100 t a (c) ? v out (mv) -15 -20 -25 -30 20 -35
page 16 january 2002 toko, inc. TK112XXCM definition and explanation of technical terms output voltage (v out ) the output voltage is specified with v in = v out(typ) + 1 v and i out = 5 ma. maximum output current (i out(max) ) the rated output current is specified under the condition where the output voltage drops 0.9 times the value specified with i out = 5 ma. the input voltage is set to v out(typ) +1 v, and the current is pulsed to minimize temperature effect. the output current decreases during low voltage operation. dropout voltage (v drop ) the dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation (this is the point when the output voltage decreases by 100 mv). below this value, the output voltage will fall as the input voltage is reduced. it is dependent upon the load current and the junction temperature. line regulation (line reg) line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. the line regulation is specified as the input voltage is changed from v in = v out + 1 v to v in = v out + 6 v. it is a pulsed measurement to minimize temperature effects. load regulation (load reg) load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. it is a pulsed measurement to minimize temperature effects with the input voltage set to v in = v out +1 v. the load regulation is specified under two output current step conditions of 5 ma to 100 ma and 5 ma to 200 ma. quiescent current (i q ) the quiescent current is the current which flows through the ground terminal under no load conditions (i out = 0 ma). ground pin current (i gnd ) the ground pin current is the current which flows through the gnd terminal according to load current. it is measured by (input current-output current). ripple rejection ratio (rr) ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. it is specified with 200 mv rms , 400 hz and 1 khz signal superimposed on the input voltage, where v in = v out + 1.5 v. the output decoupling capacitor is set to 1.0 f, the noise bypass capacitor is set to 0.01 f, and the load current is set to 10 ma. ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in db. ripple rejection can be improved by increasing the noise bypass capacitor (however, the on/off response time will increase). standby current (i stby ) standby current is the current into the regulator when the output is turned off by the control function. it is measured with an input voltage of 8 v. over current sensor the over current sensor portects the device when there is excessive output current. it also protects the device if the output if accidentally shorted to ground. thermal sensor the thermal sensor protects the device if the junction temperature exceeds the safe value (t j = 150 c). this temperature rise can be caused by extreme heat, excessive power dissipation caused by large output voltage drops, or excessive output current. the regulator will shut off when the temperature exceeds the safe value. as the junction temperature decreases, the regulator will begin to operate again. under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. damage may occur to the device under extreme fault conditions. 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. toko?s regulators do not need an inherent diode connected between the input and output. the maximum reverse bias voltage is 6 v.
january 2002 toko, inc. page 17 TK112XXCM package power dissipation (p d ) this is the power dissipation level at which the thermal sensor is activated. the ic contains an internal thermal sensor which monitors the junction temperature. when the junction temperature exceeds the monitor threshold of 150 c, the ic is shut down. the junction temperature rises as the difference between the input power (v in x i in ) and the output power (v out x i out ) increases. the rate of temperature rise is greatly affected by the mounting pad configuration on the pcb, the board material, and the ambient temperature. when the ic mounting has good thermal conductivity, the junction temperature will be low even if the power dissipation is large. when mounted on the recommended mounting pad, the power dissipation of the sot23l-6 is increased to 600 mw. for operation at ambient temperatures over 25 c, the power dissipation of the sot23l-6 device should be derated at 4.8 mw/ c. to determine the power dissipation for shutdown when mounted, attach the device on the actual pcb and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. calculate the power dissipation of the device by subtracting the output power from the input power. these measurements should allow for the ambient temperature of the pcb. the value obtained from p d /(150 c - t a ) is the derating factor. the pcb mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. as a general rule, the lower the temperature, the better the reliability of the device. the thermal resistance when mounted is expressed as follows: t j = 0 ja x p d + t a for toko ics, the internal limit for junction temperature is 150 c. if the ambient temperature (t a ) is 25 c, then: 150 c = 0 ja x p d + 25 c 0 ja = 125 c / p d 0 ja = 125 c / p d (c / mw) definition and explanation of technical terms (cont.) p d is the value when the thermal protection circuit is activated. a simple way to determine p d is to calculate v in x i in when the output side is shorted. input current gradually falls as temperature rises. you should use the value when thermal equilibrium is reached. the range of usable currents can also be found from the graph below. procedure: 1) find p d 2) p d1 is taken to be p d x (~0.8 - 0.9) 3) plot p d1 against 25 c 4) connect p d1 to the point corresponding to the 150 c with a straight line. 5) in design, take a vertical line from the maximum operating temperature (e.g., 75 c) to the derating curve. 6) read off the value of p d against the point at which the vertical line intersects the derating curve. this is taken as the maximum power dissipation, d pd . the maximum operating current is: i out = (d pd / (v in(max) - v out ) tk112xxc v out v in gnd p d d pd 25 50 75 150 t a (c) 2 5 4 3 pd(mw) 100
page 18 january 2002 toko, inc. TK112XXCM application information (cont.) board layout sot23l-6 board layout derating curve power dissipation is 600 mw when mounted as recommended. decrease at the rate of 4.8 mw/c for operation above 25 c. on / off v in v out 600 25 50c 150 85c pd(mw) 100 sot23l-6 -4.8 mw/c temperature(c)
january 2002 toko, inc. page 19 TK112XXCM application information application hint on / off control it is recommended to turn the regulator off when the circuit following the regulator is not operating. a design with little electric power loss can be implemented. we recommend the use of the on / off control of the regulator without using a high side switch to provide an output from the regulator. a highly accurate output voltage with low voltage drop is obtained. because the control current is small, it is possible to control it directly by cmos logic. the pulldown resistance is built into the control terminal (500 k . the noise and ripple rejection characteristics depend on the capacitance on the noise bypass teminal. the ripple rejection characteristic of the low frequency region improves by increasing the capacitance of c n . a standard value is c n =0.068 f. increase c n in a design with important output noise and ripple rejection requirements. the ic will not be damaged if the capacitor value is increased. the switching speed of off / on changes depending on the capacitance at the noise bypass terminal. the switching speed slows when the capacitance is large. there is an overheating concern because the power loss of the low voltage output (tk11220) ic is large. if necessary, decrease the electric power loss by using the resistor (r) as shown in the left chart. when the thermal sensor works, a decrease of the output voltage, oscillation, etc. are observed. tk11250c tk11220c tk11233c v in on / off control 5 v 2.0 v 3.3 v r v sat reg on / off
page 20 january 2002 toko, inc. TK112XXCM application information c in =0.22 f ~0.1 f c l =0.22 f ~0.1 f input-output capacitors linear regulators require input and output capacitors in order to maintain the regulator?s loop stability. the equivalent serie s resistance (esr) of the output capacitor must be in the stable operation area. however, it is recommended to use as large a value of capacitance as is practical. the output noise and the ripple noise decrease as the capacitance value increases. the ic is never damaged by enlarging the capacitance. esr values vary widely between ceramic and tantalum capacitors. however, tantalum capacitors are assumed to provide more esr damping resistance, which provides greater circuit stability. this implies that a higher level of circuit stability can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values. the ic provides stable operation with an output side capacitor of 0.22 f (v out 2.0 v). if the capacitor is 0.1 f or more over its full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering esr (v out 2.0 v). the input capacitor is necessary when the battery is discharged, the power supply impedance increases, or the line distance to the power supply is long. this capacitor might be necessary on each individual ic even if two or more regulator ics are used. it is not possible to determine this indiscriminately. please confirm the stability while mounted. please increase the output capacitor value when the load current is 0.5 ma or less. the stability of the regulator improves if a big output side capacitor is used (the stable operation area extends). for evalutaion kyocera: cm05b104k10ab, cm05b224k10ab, cm105b104k161, cm105b224k16a, cm21b225k10a murata: grm36b104k10, g4m42b104k10, grm39b014k25, grm39b224k10, grm39b105k6.3 for output voltage device 2.0 v applications, the recommended value of cl 0.22 f. for output voltage device 1.5 v applications, the recommended value of cl 0.47 f. for load current 0.5 ma, increase the output capacitor to 1 f. 100 10 1 0.1 0 .01 esr ( ? ) 4.0 50 100 150 i out (ma) all stable cl 2.2 f v out = 1.5 v 5.0 50 100 150 i out (ma) all stable cl 0.33 f 5.0 50 100 150 i out (ma) all stable cl 0.33 f 2.0 50 100 150 i out (ma) all stable cl 0.68 f i out (ma) all stable cl 1.0 f v out = 1.8 v, 2.2 v 2.0 50 100 150 v out = 2.5 v, 3.0 v v out = 4.0 v v out = 5.0 v 100 10 1 0.1 0 .01 esr ( ? ) 100 10 1 0.1 0 .01 esr ( ? ) 100 10 1 0.1 0 .01 esr ( ? ) 100 10 1 0.1 0 .01 esr ( ? ) stable area cl = 0.1 f stable area cl = 0.1 f stable area cl = 0.068 f stable area cl = 0.1 f stable area cl = 0.1 f
january 2002 toko, inc. page 21 TK112XXCM application information (cont) generally, a ceramic capacitor has both a temperature characteristic and voltage characteristic. please consider both characteristics when selecting the part. the b curves are the recommended characteristics. capacitance vs. temperature 100 90 80 70 60 50 -50 -25 0 25 50 75 100 t a (c) f curve b curve capacitance(%) capacitance vs. voltage 100 90 80 70 60 50 0 2 4 6 8 10 bias voltage (v) f curve b curve capacitance(%)
page 22 january 2002 toko, inc. TK112XXCM marking information product code r voltage code tk11215c 15 tk11216c 16 tk11217c 17 tk11218c 18 tk11219c 19 tk11220c 20 tk11221c 21 tk11222c 22 tk11223c 23 tk11224c 24 tk11225c 25 tk11226c 26 tk11227c 27 tk11228c 28 tk11229c 29 tk11230c 30 tk11231c 31 tk11232c 32 tk11233c 33 tk11234c 34 tk11235c 35 tk11236c 36 tk11237c 37 tk11238c 38 tk11239c 39 tk11240c 40 tk11241c 41 tk11242c 42 tk11243c 43 tk11244c 44 tk11245c 45 tk11246c 46 tk11247c 47 tk11248c 48 tk11249c 49 tk11250c 50 note: pin 2 and pin 5 should be grounded for heat dissipation sot23l-6 package outline printed in the usa ? 1999 toko, inc. all rights reserved toko america regional offices toko america, inc. headquarters 1250 feehanville drive, mount prospect, illinois 60056 tel: (847) 297-0070 fax: (847) 699-7864 ic-242-tk112xxc 0.95 0.95 0.32 m 0.1 +0.15 -0.05 3.5 1 . 2 0 . 1 5 0 . 3 3.3 2.2 0.95 0.95 3 . 0 e e 1 0.6 1 . 0 recommended mount pad 123 6 0 ~ 0 . 1 1 5 m a x 1 . 4 m a x marking +0.3 -0.1 0.3 (3.4) 0 . 1 dimensions are shown in millimeters tolerance: x.x = 0.2 mm ( unless otherwise s p ecified ) m 0.1 +0.15 -0.05 0.4 5pl e e rxx voltage code product code 0.4 0.1 visit our internet site at http://www.tokoam.com the information furnished by toko, inc. is believed to be accurate and reliable. however, toko reserves the right to make chang es or improvements in the design, specification or manufacture of its products without further notice. toko does not assume any liability arising from the application or use of any product or circuit descri bed herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. no license is granted by implication or otherwise under any patent or patent rights of tok o, inc. toko?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of toko, incorporated. midwest regional office toko america, inc. 1250 feehanville drive mount prospect, il 60056 tel: (847) 297-0070 fax: (847) 699-7864 semiconductor technical support toko design center 4755 forge road colorado springs, co 80907 tel: (719) 528-2200 fax: (719) 528-2375

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