february 8, 2002 toko, inc. page 1 tk655xxm advanced information low dropout voltage very low quiescent current (50 a maximum) internal bandgap reference regulates down to 1.8 v short circuit protection very low standby current active high on/off control low input voltage detection low output voltage detection small sot23l-6 package block diagram tk655xxm tk655xxm ordering information tape/reel code tl: tape left package code m: sot-23l-6 tape/reel code package code voltage code 18 = 1.8 v 33 = 3.3 v 20 = 2.0 v 35 = 3.5 v 25 = 2.5 v 40 = 4.0 v 28 = 2.8 v 45 = 4.5 v 30 = 3.0 v 50 = 5.0 v voltage code the tk655xx is a low dropout linear regulator housed in a small sot23l-6 package, rated at 400 mw. an internal p channel pass element is used in order to achieve low dropout voltage. the device has extremely low quiescent current (max 50 a). the device offers high precision output voltage of 2.5% over the full temperature range. the low quiescent current and dropout voltage make this part ideal for battery powered applications. in the standby mode when the output is disabled, the linear regulator only draws 6 a typically. the tk655xx cmos linear regulator also offers low input indication (lii). this supply monitor trips typically at 1.1 times vout to indicate the user the supply is running low. the device further offers a low output indicator (loi) which typically trips if the output drops to 93% of its regulation level. battery powered systems cellular telephones pagers toys radio control systems low voltage systems personal communications systems portable instrumentation portable consumer equipment cmos ldo regulator with input and output voltage detectors advanced information lii v in loi v out control gnd control gnd v in v out loi lii + - + - + - applications features description with the integration of the voltage monitors for input and output voltages, the tk655xx cmos linear regulator is a space and cost effective solution to a power management system designer.
page 2 february 8, 2002 toko, inc. tk655xxm advanced information absolute maximum ratings supply voltage ........................................................... 6 v power dissipation (note 1) ................................. 400 mw electrical characteristics test conditions: v dd = 5 v, t a = 25 c, unless otherwise specified. note 1: power dissapation is 400 mw when mounted as recommended. derate at 3.2 mw/c for operation above 25 c. note 2: v reg = 1.8 v to 5 v, 0.1 v step. 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 n i e g n a r e g a t l o v y l p p u s25 . 5v i q t n e r r u c t n e c s e i u qi t u o a m 0 =0 5a i y b t s t n e r r u c y b d n a t sf f o t u p t u o60 2a v t u o e g a t l o v t u p t u oi t u o ) 2 e t o n ( a m 1 =% 5 . 1 -v g e r % 5 . 1 +v v ) p m e t ( t u o e g a t l o v t u p t u o i t u o g n i t a r e p o r e v o a m 1 = e g n a r e r u t a r e p m e t % 1 -v t u o % 1 +v v p o r d e g a t l o v t u o p o r di t u o a m 0 0 1 =0 0 10 5 3v m i t u o t n e r r u c t u p t u o0 0 1d b ta m g e r e n i ln o i t a l u g e r e n i lv n i v = g e r a m 1 @ v 5 . 5 o t v 5 . +0 5v m g e r d a o ln o i t a l u g e r d a o li t u o a m 1 =a m 0 8 o t0 0 1v m r rn o i t c e j e r e l p p i ra m 0 3 @0 6b d s 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 a n i m r e t l o r t n o c 10 1a v t n o c ) n o (n o e g a t l o v l o r t n o cn o t u p t u o8 . 1v n i 1 . 0 +v v t n o c ) f f o (f f o e g a t l o v l o r t n o cf f o t u p t u o06 . 0v s n a r t) n o o t f f o ( t n e i s n a r ti t u o f 1 . 0 = l c , a m 0 5 =0 0 1s n o i t a c i f i c e p s l a n i m r e t r o t a c i d n i t u p t u o w o l v ) i o l ( h t d l o h s e r h t i o l% 1 -v 3 9 . t u o % 1v i ) i o l ( s t n e r r u c k n i s i o lv , v 5 . 0 @ n i p i o l n i v 3 =5 . 1a m ? v ) i o l ( h t s i s e r e t s y h d l o h s e r h t i o l 5% t ) l h ( d ) w o l o t h g i h ( y a l e d 0 0 2s t ) h l ( d ) h g i h o t w o l ( y a l e d 0 0 1s n o i t a c i f i c e p s l a n i m r e t r o t a c i d n i t u p n i w o l v ) i i l ( h t d l o h s e r h t i i l% 5 . 2 -v 1 . 1 t u o % 5 . 2 +v i ) i i l ( s t n e r r u c k n i s i i lv , v 5 . 0 @ n i p i i l n i v 3 =5 . 1a m ? v ) i i l ( h t s i s e r e t s y h d l o h s e r h t i i l357% t ) l h ( d ) w o l o t h g i h ( y a l e d 0 0 2s t ) h l ( d ) h g i h o t w o l ( y a l e d 0 0 1s storage temperature r ange ....................... -55 to +150 c operating temperature range ..................... -30 to +80 c
february 8, 2002 toko, inc. page 3 tk655xxm advanced information typical performance characteristics t a = 25 c, unless otherwise specified. tk65520 output voltage vs. output current output current (ma) output voltage (v) 2.05 1.95 1.85 1.75 1.65 1.55 1.45 0 30 60 90 120 150 180 210 v in = 1.8 v v in = 2.0 v v in = 2.2 v v in = 2.4 v tk65545 output voltage vs. output current output current (ma) output voltage (v) 4.60 4.50 4.40 4.30 4.20 4.10 4.00 0 30 60 90 120 150 180 210 3.90 3.80 v in = 4.5 v v in = 4.7 v v in = 4.9 v v in = 4.3 v tk65520 output voltage vs. input voltage input voltage (v) output voltage (v) 2.05 1.95 1.85 1.75 1.65 1.55 1.45 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 180 ma 120 ma 0 ma 60 ma tk65545 output voltage vs. input voltage input voltage (v) output voltage (v) 4.60 4.50 4.40 4.30 4.20 4.10 4.00 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 3.90 3.80 0 ma 180 ma 120 ma 60 ma tk65520 output voltage vs. temperature temperature (c) regulator output voltage (v) 2.06 2.04 2.02 2.00 1.98 1.96 1.92 -50 -25 0 25 50 75 100 125 1.94 1.90 1 ma load, c out = 2.2 mf tantalum tk65545 output voltage vs. temperature temperature (c) regulator output voltage (v) 4.65 4.60 4.55 4.50 4.45 4.40 -50 -25 0 25 50 75 100 125 4.35 1 ma load, c out 2.2 f tantalum
page 4 february 8, 2002 toko, inc. tk655xxm advanced information typical performance characteristics (cont) t a = 25 c, unless otherwise specified. tek run: 2.50ks/s ch1 2v/div ch2 1v/div 20ms/div [ ] t ch2 = v out ch1 = v in tk65520 power off to on transient tek run: 2.50ks/s ch1 2v/div ch2 1v/div 20ms/div [ ] t tk65545 power off to on transient ch2 = v out ch1 = v in tk655xx regulator current vs. temperature temperature (c) regulator current ( a) 70 60 50 40 30 10 -50 -25 0 25 50 75 100 125 20 0 tk655xx standby current vs. temperature temperature (c) regulator standby current ( a) 70 60 50 40 30 10 -50 -25 0 25 50 75 100 125 20 0 tk655xx lii asserted (on) 100 ma load vs. temperature temperature (c) lii voltage (v) 5.5 5.0 4.5 4.0 3.5 2.5 -50 -25 0 25 50 75 100 125 3.0 2.0 tk65545 tk65520 tk655xx lii de-asserted (off) 100 ma load vs. temperature temperature (c) lii voltage (v) 5.5 5.0 4.5 4.0 3.5 2.5 -50 -25 0 25 50 75 100 125 3.0 2.0 tk65545 tk65520
february 8, 2002 toko, inc. page 5 tk655xxm advanced information pin description pin1 input voltage pin (v in ) this pin is the positive input supply for the tk655xx cmos linear regulator. current flowing into this pin provides power to the ic and to the internal pass transistor. the voltage source driving this pin should have relatively low ac impedance. good design practices dictate decoupling to the gnd pin. pin 2 low input indicator pin (lii) this pin is an open drain where typically a high value resistor of the order of 300k ohms will be used to pull the lii pin to v out or v in depending on the application. the supply voltage is internally monitored via a resistor divider network which compares against the bandgap reference. the trip point to indicate the supply is low is set to 1.1 v out . pin 3 control pin the control pin acts as an enable pin to power up the device when the control pin is tied to a high potential (greater than 0.8 v). when the user requires to disable the part, the control pin must be brought below 0.6 v. while in the disable mode, the output voltage will droop to zero volts, the device will draw lower current (standby current), yet the low input indicator circuit is still awake monitoring the supply. pin 4 low output indicator pin (loi) this pin is also an open drain where a large value resistor of the order of 300k ohms will pull the loi pin to v in or v out depending on the application. the purpose of this signal is to inform that the device is out of regulation. the device can go out of regulation when excessive loading is requested from the regulator. the device can also go out of regulation if the input supply is low and therefore the output must drop with the input. pin 5 ground pin (gnd) this pin provides the ground connection for the ic. pin 6 output voltage pin (v out ) this pin senses the output voltage of the regulator. the output voltage is resistively divided in the ic and compared to the bandgap voltage. if the output voltage drops below regulation, the tk655xx pass transistor will be activated by the opamp regulation loop to maintain the output at the desired voltage.
page 6 february 8, 2002 toko, inc. tk655xxm advanced information marking information part number marking 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-216-tkxxxxx 0798o0.0k 1.2 0.15 0.3 3.3 2.2 0.4 0.2 0.2 0.3 0~0.1 15 max 1.4 max 0.2 0.1 0.95 0.95 5-0.32 e e m 0.1 3.4 0.95 0.95 3.0 e e e 1 0.6 1.0 recommended mount pad 123 4 5 6 0.4 m 0.1 - 0.05 + 0.15 - 0.05 + 0.15 - 0.1 + 0.3 mark- ing 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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