technical data january, 2011, rev. 0 1 5- v low - drop fixed voltage regulator functional description this device is a 5 - v low - drop fixed - voltage regulator. the maximum input voltage is 42 v (65 v, ?400 ms). up to an input voltage of 26 v and for an output current up to 550 ma it regulates the output voltage within a 2 % accuracy. the short circuit protection limits the output current of more than 650 ma. the device incorporates over voltage protection and temperature protection that disables the circuit at unpermissibly high temp eratures. features ? output voltage tolerance 2 % ? low - drop voltage ? integrated overtemperature protection ? reverse polarity protection ? input voltage up to 42 v ? overvoltage protection up to 65 v ( 400 ms) ? short - circuit proof ? suitable for use in automotive electronics ? wide temperature range ? adjustable reset time application description the ic regulates an input voltage in the range of 5.5 v < v i < 36 v to v qnom = 5.0 v. up to 26 v it produces a regulated output current of more than 550 ma. above 26 v the save - operating - area prote ction allows operation up to 36 v with a regulated output current of more than 300 ma. overvoltage protection limits operation at 42 v. the overvoltage protection hysteresis restores operation if the input voltage has dropped below 36 v. a reset signal is generated for an output voltage of v q < 4.5 v. the delay for power - on reset can be set externally with a capacitor. design notes for external components an input capacitor c i is necessary for compensation of line influences. the resonant circuit consisting of lead inductance and input ca pacitance can be damped by a resistor of approx. 1 ? in series with c i . an output capacitor c q is necessary for the stability of the regulating circuit. stability is guaranteed at values of c q 22 f and an esr of < 3 ? . ILE4270G i l e 4270 g d2 p - 263 - 5 - 1 i l e 4270 g kb p - to220 - 5 - 12 t a = - 40 125 c for all packages. ILE4270G d2 ILE4270G kb
ILE4270G january, 2011, rev. 0 1 pin configuration pin def initions and functions pin symbol function 1 i input : block to ground directly on the ic with ceramic capacitor 2 ro reset output : the open collector output is connected to the 5 v output via an integrated resistor of 30 k ?. 3 gnd ground : internally connected to heatsink. 4 d reset delay : connect a capacitor to ground for delay time adjustment. 5 q 5 - v output : block to ground with 22 f capacitor, esr < 3 ? .
ILE4270G january, 2011, rev. 0 1 circuit description the control amplifier compares a reference voltage, whic h is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and drives the base of a series transistor via a buffer. saturation control as a function of the load current prevents any over - saturation of the po wer element. if the output voltage decreases below 4.5 v, an external capacitor c d on pin 4 (d) will be discharged by the reset generator. if the voltage on this capacitor drops below v drl, a reset signal is generated on pin 2 (ro), i.e. reset output is se t low. if the output voltage rises above 4.5 v, c d will be charged with constant current. after the power - on- reset time the voltage on the capacitor reaches v du and the reset output will be set high again. the value of the power - on- reset time can be set wi thin a wide range depending of the capacitance of c d. the ic also incorporates a number of internal circuits for protection against: ? overload ? overvoltage ? overtemperature ? reverse polarity block diagram
ILE4270G january, 2011, rev. 0 1 absolute maximum ratings t j = ? 40 to 150 c parameter symbol limit values unit notes min. max. input voltage voltage current vi vi ii ? 42 42 65 v v t 400 ms internally limited reset output voltage current v r i r ? 0.3 7 v internally limited reset delay voltage current v d i d ? 0.3 7 v internally limited output voltage current v q i q ? 1.0 16 v internally limited ground current i gnd ? 0.5 ? a ? temperatures junction temperature storage temperature t j t stg ? 50 150 150 c c ? optimum reliability and life time are guaranteed if the junction temperature does not exceed 125 c in operating mode. operation at up to the maximum junction temperature of 150 c is possible in principle. * stresses beyond those listed under ?absolute maximum ratings? may cause per manent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditions? is not implied. exposure to absolute - maximum - rated conditio ns for extended periods may affect device reliability. operating range parameter symbol limit values unit notes min. max. input voltage v i 6 42 v ? junction temperature t j ? 40 150 c ? thermal resistance junction ambient r thja ? 65 k/w to263 junction case r thjc z thjc ? 3 2 k/w k/w t < 1 ms to263
ILE4270G january, 2011, rev. 0 1 characteristics v i = 13.5 v; ? 40 c t j = 125 c (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max. output voltage v q 4.90 5.00 5.10 v 5 ma i q 550 ma; 6 v v i 26 v output voltage v q 4.90 5.00 5.10 v 26 v v i 36 v; i q 300 ma output current limiting i qmax 650 850 ? ma v q = 0 v current consumption i q = i i ? i q i q ? 1 1.5 ma i q = 5 ma current consumption i q = i i ? i q i q ? 55 75 ma i q = 550 ma current consumption i q = i i ? i q i q ? 70 90 ma i q = 550 ma; v i = 5 v drop voltage v dr ? 350 700 mv i q = 550 ma1) 1) drop voltage = v i ? v q (measured when the output voltage has dropped 100 mv from the nominal value obtained at 13.5 v input) characteristics (c ont?d) v i = 13.5 v; ? 40 c t j = 125 c (unless otherwise specified) parameter symbol limit values unit test condition min. typ. max. load regulation ? v q ? 25 50 mv i q = 5 to 550 ma; v i = 6 v supply voltage regulation ? v q ? 12 25 mv v i = 6 to 2 6 v i q = 5 ma power supply ripple rejection p srr ? 54 ? db f r = 100 hz; v r = 0.5 v ss reset generator switching threshold v rt 4.5 4.65 4.8 v ? reset high voltage v roh 4.5 ? ? v ? reset low voltage v rol ? 60 ? mv r intern = 30 k ? 2); 1.0 v v q 4.5 v reset low voltage v rol ? 200 400 mv i r = 3 ma, v q = 4.4 v reset pull - up r 18 30 46 k ? internally connected to q lower reset timing threshold v drl 0.2 0.45 0.8 v v q < v rt charge current i d 8 14 25 a v d = 1.0 v upper timing threshold v du 1.4 1.8 2.3 v ? delay time t d ? 13 ? ms c d = 100 nf reset reaction time t rr ? ? 3 s c d = 100 nf overvoltage protection turn - off voltage v i , ov 42 44 46 v ? 1) drop voltage = v i ? v q (measured when the output voltage has dropped 100 mv from the nominal value
ILE4270G january, 2011, rev. 0 1 obtai ned at 13.5 v input) 2) reset peak is always lower than 1.0 v. test circuit application circuit
ILE4270G january, 2011, rev. 0 1 time response
ILE4270G january, 2011, rev. 0 1 package d i mension s ILE4270G kb p - to 220 - 5 - 12 ILE4270G d2 p - to 2 63- 5 - 1
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