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type package tle 4287 g pg-dso-14 5-v voltage regulator tle 4287 g data sheet 1 rev. 1.4, 2009-01-12 features ? output voltage tolerance 2% very low standby cu rrent consumption input voltage up to 42 v reset function down to 1 v output voltage adjustable reset time on/off logic overtemperature protection reverse polarity protection short-circuit proof very wide temperature range very small output capacitor green product (rohs compliant) aec qualified functional description the tle 4287 g is a monolithic integrat ed 5 v voltage regulator in pg-dso-14 package. it supplies an output current i q > 250 ma. the ic is short circuit proof and incorporates temperature prot ection which turns off the device at overtemperature. the input voltage v i is regulated in t he range of 7.5 v < v i < 40 v to v q,nom = 5 v. therefore a reference voltage, which is kept highly accurate by re sistance adjustment, is compared via a control amplif ier to a voltage that is propor tional to the output voltage. the control amplifier drives the base of the series transistor by a buffer. a comparator in the reset-generator blo ck compares a refer ence voltage that is independent of the input volt age to the scaled-dow n output voltage. in the case of an output voltage v q < 4.5 v the reset delay capacitor is discharged and a reset signal is generated by setting th e reset output low. the reset delay time can be set by choosing the external capacitor over a wide rang e. when the output voltage rises above v q 4.5 v the reset delay capacitor is charged again. as soon as the delay capacitor voltage reaches the upper switching threshold the reset output pin is set high again.
data sheet 2 rev. 1.4, 2009-01-12 tle 4287 g the device has two logic inputs, en and h. it is turned on by a volt age > 4 v at en, for example by the ignition and re mains active in case h is se t low, even if the voltage at en goes low. this makes it possible to impl ement a self-holding ci rcuit without external components. when the device is turned off, the output voltage drops to 0 v and current consumption tends towards 0 a (see table 1 ). design notes for external components the input capacitor c i is necessary for compensation line influences. the resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 ? in series with c i . the output capacitor is nece ssary for the stability of the regulating circuit. stabili ty is guaranteed for c q 100 nf within the operating temperature range. table 1 state table for turn-on/turn-off logic enable en hold h v q remarks l x 0 v initial state h x 5 v regulator switched on via pin 6, by ignition for example h l 5 v pin 9 clamped active to gnd by controller while pin 6 is still high x l 5 v previous state remains, even ignition is shut off: self-holding state l l 5 v ignition shut of f while regulator is in self-holding state l h 0 v regulator shut down by releasing of pi n 9 while pin 6 remains low, final stat e. no active clamping required by external self-holding circuit ( c) to keep regulator shut off
tle 4287 g data sheet 3 rev. 1.4, 2009-01-12 figure 1 pin configuration (top view) table 2 pin definitions and functions pin no. symbol function 1i input; block to ground directly at the ic by a ceramic capacitor 2 n.c. not connected 3, 4, 5, 10, 11, 12, 14 gnd ground 6en enable; active high, device is turn ed on by high signal at this pin, internally connected to gnd via pu ll-down resistor of 100 k ? 7ro reset output; open-collector output, internally connected to q via a pull-up re sistor of 30 k ? 8d reset delay; connect to gnd via exte rnal delay capacitor for setting delay time 9h hold and release; active low, see table 1 for function, connected to q via a pul l-up resistor of 50 k ? 13 q output; block to gnd with a capacitor c q 100 nf aep02240 gnd gnd q gnd 11 12 13 gnd 14 4 3 2 1 gnd n.c. i en ro gnd 6 7 5 9 8 10 d h gnd
data sheet 4 rev. 1.4, 2009-01-12 tle 4287 g figure 2 block diagram temperature sensor saturation control and reference bandgap adjustment 6 1 13 7 8 enable delay reset input aeb02241 control amplifier buffer reset generator turn-on / turn-off logic hold 9 gnd 3,4,5,10,11,12,14 protection circuit reset output 5v output
tle 4287 g data sheet 5 rev. 1.4, 2009-01-12 note: maximum ratings are absolute ratings; exceeding any one of these values may cause irreversible damage to the integrated circuit. table 3 absolute maximum ratings parameter symbol limit values unit remarks min. max. input i voltage v i -0.5 42 v ? current i i ? ? ma internally limited output q voltage v q -0.3 7 v ? current i q ? ? ? internally limited reset output ro voltage v r -0.3 7 v ? current i r ? ? ? internally limited reset delay d voltage v d -0.3 42 v ? current i d ???? enable en voltage v en -42 42 v ? current i en -5 5 ma t 400 ms hold h voltage v h -2 7 v ? current i h ? ? ? internally limited ground gnd current i gnd -0.5 ? a ? temperatures junction temperature t j -40 150 c? storage temperature t stg -50 150 c? esd susceptibility esd resistivity to gnd v esd -1.5 1.5 kv hbm 1) 1) esd susceptibility, human body model hbm according to eia/jesd 22-a114b
data sheet 6 rev. 1.4, 2009-01-12 tle 4287 g table 4 operating range parameter symbol limit values unit remarks min. max. input voltage v i 7.5 42 v ? junction temperature t j -40 165 c? thermal resistances junction pin r thj-pin ? 32 k/w measured to pin 4 junction ambient r thj-a ? 112 k/w 1) 1) package mounted on pcb 80 80 1.5 mm 3 ; 35 cu; 5 sn; footprint only; zero airflow.
tle 4287 g data sheet 7 rev. 1.4, 2009-01-12 table 5 electrical characteristics 7.5 v v i 40 v; -40 c < t j < 150 c; v en > 4 v (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max. output voltage v q 4.90 5.0 5.10 v 5 ma < i q < 200 ma 7.5 v < v i < 22 v output voltage v q 4.90 5.0 5.10 v 5 ma < i q < 80 ma 7.5 v < v i < 36 v output current limitation i q 250??ma v i < 22 v drop voltage v dr ?1.82.5v i q = 200 ma 1) current consumption i q = i i - i q i q ?1.010 a regulator off : t j < 125 c, v en = 0 v, h = open 7.5 v v i 16.5v current consumption i q = i i - i q i q ?2.35ma5 ma < i q < 200 ma, v i = 16 v load regulation ? v q,lo -25 ? +25 mv 5 ma < i q < 200 ma line regulation ? v q,li -25 ? +25 v 7.5 v < v i < 22 v i q = 20 ma power supply ripple rejection psrr ?55?db f r = 100 hz; v r = 0.5 vpp temperature output voltage drift ? v q / ? t ?0.5?mv/k? output capacitance c q 100??nf? reset generator reset switching threshold v q,rt 4.50 4.65 4.80 v ? reset output low voltage v rl ?0.10.4v r ext = 4.7 k ? to v q 2) reset output high voltage v rh 4.5 ? 5.05 v r ext = reset pull-up resistor r r 20 30 40 k ? internally connected to q reset charging current i d,c 10 15 38 a v d = 1.5 v upper timing threshold v du 2.2 3 3.6 v ? lower timing threshold v dl 0.1 0.43 0.8 v ? delay saturation voltage v d,sat ?50?mv v q < v q,rt
data sheet 8 rev. 1.4, 2009-01-12 tle 4287 g figure 3 application circuit reset delay time t rd 7.52030ms c d = 100 nf reset reaction time t rr 0.5 2.0 4.0 s c d = 100 nf enable en, hold h enable turn-on voltage v en 2.3 3.0 4.0 v ic turned-on enable turn-off voltage v en 2.0 2.5 3.5 v ic turned-off enable pull- down resistor r en 50 100 200 k ? internally connected to gnd enable hysteresis ? v en 0.2 0.4 0.8 v ? enable input current i en ? 35 100 a v en = 4 v hold keep on voltage v h 30 35 50 % referred to v q ; v q > 4.5 v hold release voltage v h 60 70 80 % referred to v q ; v q > 4.5 v hold pull-up resistor r h 20 50 100 k ? internally connected to q 1) measured when the output voltage v q has dropped 100 mv from the nominal value. 2) the reset output is low between v q = 1 v and v rt . table 5 electrical characteristics (cont?d) 7.5 v v i 40 v; -40 c < t j < 150 c; v en > 4 v (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max. aes02243 7 9 8 13 1 5 v input tle 4287 reset to c i c 100 nf q 100 nf c e.g. from enable 6 100 nf d c 3, 4, 5, 10, 11, 12, 14 hold from c i q en ro d gnd h terminal 15 output
tle 4287 g data sheet 9 rev. 1.4, 2009-01-12 figure 4 time response aes03087_4287 v v d v dl du v d, sat v q v q, rt v ro rl v v en v en, on en, off v i v rr t < rr t rd t shutdown undervoltage reset power-on shutdown thermal voltage drop at input secondary spike load bounce at output
data sheet 10 rev. 1.4, 2009-01-12 tle 4287 g figure 5 enable and hold behavior aes03088 ro v rl v d, sat v v d v dl v du v q v q, rt v h v h, rel v h, hold v v en, off en, on en v v i 1) 5) 2) 4) 6) 7) 10) 8) 3) 9) t rr t rd < 10 s < 1 s 1) enable active 2) hold inactive, pulled up by v q 3) power-on reset 4) hold active, clamped to gnd by external mc 5) enable inactive, clamped by int, pull-down resistor 6) pulse width smaller than 1 s 7) hold inactive, released by mc 8) voltage controller shutdown 9) output-low reset 10) no switch on via e6 v possible after e6 was released to e6 v > v e6, rel for more than 4 s q, nom v
tle 4287 g data sheet 11 rev. 1.4, 2009-01-12 package outlines figure 6 pg-dso-14 (plastic dual small outline) green product (rohs compliant) to meet the world-wi de customer requirements for envi ronmentally friendly products and to be compliant with government regula tions the device is available as a green product. green products are ro hs-compliant (i.e pb-free fi nish on leads and suitable for pb-free soldering according to ipc/jedec j-std-020). 1) does not include plastic or metal protrusion of 0.15 max. per side 2) lead width can be 0.61 max. in dambar area -0.2 8.75 1) 0.64 0.19 +0.06 index marking 1.27 +0.10 0.41 0.1 1 14 2) 7 14x 8 0.175 (1.47) 0.07 0.2 6 0.35 x 45? -0.2 1.75 max. 4 1) 0.25 8?max. -0.06 0.2 m ab m 0.2 c c b a gps01230 find more information on infineon packages on the infineon internet page ?packages?: http://www.infineon.com/packages . dimensions in mm smd = surface mounted device
data sheet 12 rev. 1.4, 2009-01-12 tle 4287 g revision history version date changes rev. 1.4 2009-01-12 initial datasheet of rohs-compliant prod uct of tle 4287 g. page 1 and page 6 : ?esd 2kv? statements removed. page 5 : esd specification added: hbm 1.5kv page 5 : maximum junction te mperature modified to -40c < t j < 150c table 5 : respecified current consumption i q when regulator off. page 1 : ?aec certified? statement added page 1 and page 12 : rohs compliance statement and green product feature added page 1 and page 12 : package changed to rohs compliant version legal disclaimer updated
edition 2009-01-12 published by infineon technologies ag 81726 munich, germany ? 2009 infineon technologies ag all rights reserved. legal disclaimer the information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical valu es stated herein and/or any information regarding the application of the device, infineon technologies her eby disclaims any and all warranties and liabilities of any kind, including wi thout limitation, warranties of non-infrin gement of intellectual property rights of any third party. information for further information on technology, delivery terms an d conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the near est infineon technologies office. infineon technologies components may be used in life-supp ort devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safe ty or effectiveness of that device or system. life support devices or systems 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 endangered.

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