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data sheet rev. 2 1 2000-02-01 features ? high accuracy 5 v 2% ? very low-drop voltage ? very low quiescent current ? low starting-current consumption ? proof against reverse polarity ? input voltage up to 42 v ? overvoltage protection up to 65 v ( 400 ms) ? short-circuit-proof ? external setting of reset delay ? integrated watchdog circuit ? wide temperature range ? overtemperature protection ? suitable for automotive use ? emc proofed (100 v/m) t not recommended for new design. please refer to the pin compatible device tle 4271-2. functional description tle 4261-2 is a high accuracy 5-v low-drop voltage regulator in a p-dso package. the maximum input voltage is 42 v (65 v/ 400 ms). the device can produce an output current of more than 500 ma. it is short-circuit-proof and incorporates temperature protection that disables the circuit at impermissibly high temperatures. type ordering code package t tle 4261-2 g q67000-a9140 p-dso-20-6 (smd) p-dso-20-1 /-6 /-7 5-v low-drop voltage regulator tle 4261-2
tle 4261-2 data sheet rev. 2 2 2000-02-01 application description the ic regulates an input voltage v i in the range 6 v < v i <40vto v qrated = 5.0 v. a reset signal is generated for an output voltage v o of < 4.75 v. the reset delay can be set with an external capacitor. a connected microprocessor is monitored by the integrated watchdog circuit; if pulses are missing, the reset output is set low. the pulse repetition rate can be set within wide limits with the capacitor for reset delay. if this input is connected to a voltage of > 6 v, the watchdog function is deactivated. the device also features an inhibit input, which is activated by a voltage of > 6 v and then works on this input through internal hysteresis up to approx. 3 v. a voltage of < 2 v on the inhibit input turns off the regulator, current drain then dropping to max. 50 m a. design notes for external components the input capacitor c i causes a low-resistant powerline and limits the rise times of the input voltage. the ic is protected against rise times up to 100 v/ m s. it is possible to damp the tuned circuit consisting of supply inductance and input capacitance with a resistor of approx. 1 w in series to c i . the output capacitor maintains the stability of the regulating loop. stability is guaranteed with a rating of 22 m f min. at an esr of 3 w max. in the operating temperature range. circuit description the control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and controls the base of the series pnp transistor via a buffer. saturation control as a function of the load current prevents any over-saturation of the power element. if the output voltage drops below 95.5% of its typical value for more than 2 m s, a reset signal is triggered on pin 3 and an external capacitor discharged on pin 5. the reset signal is not cancelled until the voltage on the capacitor has exceeded the upper switching threshold v dt .a positive-edge-triggered watchdog circuit monitors the connected microprocessor and will likewise trigger a reset if pulses are missing. the ic can be disabled by a low level on the inhibit input and the current consumption drops to < 50 m a. the ic also incorporates a number of circuits for protection against: ? overload ? overvoltage ? overtemperature ? reverse polarity
tle 4261-2 data sheet rev. 2 3 2000-02-01 pin configuration (top view) pin definition and functions pin no. symbol function 18 v i input voltage ; block a capacitor directly to ground on the ic. the capacitor rating will depend on the vihicle electric system. oscillation of the output voltage can be damped by a resistor of approx. 1 w in series with the input capacitor. 20 inh inhibit ; switches off the ic when low. 3 qres reset output ; open collector output controlled by the reset delay. 4 -7, 14 - 17 gnd ground 9 dres reset delay ; wired to ground using a capacitor. 11 watch watchdog ; monitors the microprocessor when active. 12 v q 5-v output ; block to ground using a capacitor of 3 22- m f. esr is 3 w in the operating temperature range. 1, 2, 8, 10, 13, 19 n.c. not connected aep01182 gnd q v v i n.c. n.c. 13 14 10 15 9 16 8 17 n.c. 7 18 6 19 gnd 5 20 4 3 2 1 gnd gnd n.c. dres 11 12 qres gnd gnd n.c. gnd gnd watch n.c. inh
tle 4261-2 data sheet rev. 2 4 2000-02-01 block diagram overvoltage monitoring saturation control and protection reset generator watchdog temperature sensor adjustment bandgap reference inhibit - + 12 9 3 11 14-17 4-7 20 18 input inhibit gnd watchdog output reset delay reset output aeb00002 control amplifier buffer
tle 4261-2 data sheet rev. 2 5 2000-02-01 absolute maximum ratings t j = C 40 to 150 c parameter symbol limit values unit remarks min. max. input input voltage v i C 42 42 v C v i C65 v t 400 ms input current i i C 1.6 a C inhibit voltage v 2 C 0.3 42 v C current i 2 C 5 ma C reset output voltage v r C 0.3 42 v C current i r C C C internally limited ground current i gnd C 0.5 a C reset delay voltage v d C 0.3 42 v C current i d C C C internally limited output differential voltage v i C v q C 5.25 v i vC current i q C 1.4 a C
tle 4261-2 data sheet rev. 2 6 2000-02-01 temperature junction temperature t j C 150 cC storage temperature t stg C 50 150 cC operating range input voltage v i 1) C32 vC junction temperature t j C 40 150 cC thermal resistance system-air r thsa C 70 k/w C system-case r thsc C 15 k/w C 1) see diagram. absolute maximum ratings (contd) t j = C 40 to 150 c parameter symbol limit values unit remarks min. max.
tle 4261-2 data sheet rev. 2 7 2000-02-01 characteristics v i = 13.5 v; t j =25 c; v 5 3 6 v (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max. normal operation output voltage v q 4.9 5.0 5.1 v i q = 100 ma C40 c t j 125 c output current i q CC50 m a0v v i 2v; v 2 = v i ; C40 c t j 125 c output current i q 500 1000 C ma v i = 17 v to 28 v current consumption i q = i i C i q i q C C 3.5 ma i q = 0 ma, v w >6 v current consumption i q = i i C i q i q C C 10 ma 6 v v i 28 v i q = 150 ma current consumption i q = i i C i q i q C 5.0 65 ma 6 v v i 28 v i q = 500 ma current consumption i q = i i C i q i q C4080ma v i 6v i q = 500 ma drop voltage v dr C 0.35 0.5 v v i = 4.5 v; i q = 0.5 a drop voltage v dr C 0.2 0.3 v v i = 4.5 v; i q = 0.15 a load regulation d v q C1535mv25ma i q 500 ma supply-voltage regulation d v q C1550mv v i 6 v to 28 v; i q = 100 ma supply-voltage regulation d v q C 5 25 mv v i 6 v to 16 v; i q = 100 ma ripple rejection svr C54Cdb f = 100 hz; v r = 0.5 v ss temperature drift of output voltage a vq C2 10 C4 C1/ cC
tle 4261-2 data sheet rev. 2 8 2000-02-01 inhibit operation current consumption i 1 CC50 m a v 2 =2v; i q =0 current consumption i 2 C C 100 m a v 2 =6v switching threshold for inhibit v 2 5.0 5.5 6.0 v ic turned on switching threshold for inhibit v 2 2.0 2.7 3.7 v ic turned off reset generator switching threshold v rt 94 95.5 97 % in % of v q ; i q > 500 ma; v i =6v saturation voltage, reset output v r C 0.25 0.40 v i r =1ma reverse current i r CC1 m a v r =5v charge current i d 18.75 25 31.25 m a v c = 1.5 v switching threshold v st 0.9 1 1.1 v C delay switching threshold v dt 2.25 2.50 2.75 v C saturation voltage, delay output v c C C 100 mv v i = 4.5 v and i d delay time t d C10Cms c d = 100 nf delay time t t C2C m sC characteristics (contd) v i = 13.5 v; t j =25 c; v 5 3 6 v (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max.
tle 4261-2 data sheet rev. 2 9 2000-02-01 watchdog turn-off voltage v w 5.2 5.6 6.0 v C discharge current i cd 5.6 7.5 9.4 m a v c = 1.5 v switching voltage v cd 2.95 3.05 3.15 v C pulse intervall t w C35Cms c d = 100 nf general data turn-off voltage v ioff 41 43 45 v i q <1ma turn-off hysteresis d v i C 6.5 C v C leakage current i qs CC50 m a v q = 0v; v i = 45 v reverse output current i qr C C 1.5 ma v q = 5v; v i and v 2 open characteristics (contd) v i = 13.5 v; t j =25 c; v 5 3 6 v (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max.
tle 4261-2 data sheet rev. 2 10 2000-02-01 application circuit test circuit aes01455 tle 4261-2 nf 22 m f w 17 input 6 v to 40 v output reset from c m kl15 7 v to 18 v 2 6 5 3 4 470 100 nf 100 k k 4.7 w microcontroller from aes01508 tle 4261-2 1000 f m v i + v r r v q v i i i d i gnd i q i sc c d nf 100 v c / i r 22 f m 4.7 k w 17 3 54 q v - i v v dr = svr v r v q d 470 nf = 20 log 2 3 i v 2 6 w v
tle 4261-2 data sheet rev. 2 11 2000-02-01 time responce in watchdog condition timing with watchdog off 3.3 v overvoltage spike over- voltage = aet00593 v i d i v off rt d v over- temperature shortcircuit on output undervoltage secondary spike d d v tc d i d t d t t < < off i v q v rt v i v c v v r v dt v st w v wmin v > 6 v
tle 4261-2 data sheet rev. 2 12 2000-02-01 drop voltage versus output current current consumption versus input voltage output voltage versus input voltage current consumption versus output current aed00586 0 0 v 100 200 300 600 ma 400 800 mv = 4.5 v i v q i 400 100 300 500 600 700 200 dr c = 125 = 25 c t j t j aed00026 0 0 v i q 10 20 30 50 v 20 40 60 80 100 120 ma r l =10 w i 40 aed00027 0 0 v v q 24 610 v 2 4 6 8 10 12 v r l =10 w i 8 aed00588 0 0 i 100 200 300 600 ma 40 80 ma = 13.5 v i v q i 400 10 30 50 60 70 20 q
tle 4261-2 data sheet rev. 2 13 2000-02-01 charge current i d and discharge current i cd versus temperature pulse interval t w versus temperature switching voltage v cd and v st versus temperature output voltage versus temperature 20 15 10 40 -40 0 0 5 a 25 35 30 40 i i v c v 160 80 120 c t j aed01322 = 1.5 v = 13.5 v i d i cd 0.8 0.4 0.6 0.2 0 -40 40 0 1.6 1.2 1.4 1.0 w t c 120 80 160 t j aed01324 ms v i = 13.5 v = 100 nf d c = 13.5 v 2 -40 0 1 80 040 3 4 v v i c 120 160 j t aed01323 v v cd st v aed00028 4.60 -40 v q 0 40 80 160 4.70 4.80 4.90 5.00 5.10 5.20 v v i = 120 c j 13.5 v
tle 4261-2 data sheet rev. 2 14 2000-02-01 current consumption of inhibit at the switching point versus temperature input step responce output current versus input voltage load step responce 60 40 20 40 -40 0 0 80 a 120 100 20 i 160 c 80 120 t j aed01325 off on m aed00595 -40 -10 v 01020 50 40 2 v t 30 -20 20 0 1 0 d i q d v mv tt 1 = rf m s s m _ ~ q = c 22 m s aed00594 0 0 v i q 10 20 30 50 v 0.2 0.4 0.6 0.8 1.0 1.2 ma = 25 i 40 c t j aed00596 -200 -10 i 01020 50 200 ma t 30 -100 100 25 500 0 d q q d v mv s m q = c 22 m s
tle 4261-2 data sheet rev. 2 15 2000-02-01 package outlines 110 11 20 index marking 1) does not include plastic or metal protrusions of 0.15 max per side 2) does not include dambar protrusion of 0.05 max per side gps05094 2.65 max 0.1 0.2 -0.1 2.45 -0.2 +0.15 0.35 1.27 2) 0.2 24x -0.2 7.6 1) 0.35 x 45? 0.23 8? max +0.09 +0.8 0.3 10.3 0.4 12.8 -0.2 1) p-dso-20-6 (plastic dual small outline) sorts of packing package outlines for tubes, trays etc. are contained in our data book package information. dimensions in mm smd = surface mounted device
edition 2000-02-01 published by infineon technologies ag, st.-martin-strasse 53, d-81541 mnchen, germany ? infineon technologies ag 2000. all rights reserved. attention please! the information herein is given to describe certain components and shall not be consid- ered as warranted characteristics. terms of delivery and rights to technical change reserved. we hereby disclaim any and all warranties, including but not limited to warranties of non- infringement, regarding circuits, descriptions and charts stated herein. in?neon technologies is an approved cecc manufacturer. information for further information on technology, deliv- ery terms and conditions and prices please contact your nearest in?neon technologies of?ce in germany or our in?neon technolo- gies representatives worldwide (see ad- dress list). warnings due to technical requirements components may contain dangerous substances. for in- formation on the types in question please contact your nearest in?neon technologies of?ce. in?neon technologies components may only be used in life-support devices or systems with the express written approval of in?neon technologies, if a failure of such components can reasonably be expected to cause the fail- ure of that life-support device or system, or to affect the safety or effectiveness of that de- vice or system. life support devices or sys- tems are intended to be implanted in the hu- man body, or to support and/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endan- gered. data sheet rev. 2 16 2000-02-01 tle 4261-2

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