technical data january, 2011, rev. 0 1 5v/10 v low - drop voltage regulator functional description ile 4266 - 2 is a low - drop voltage regulator for 5 v or 10 v supply in a p - sot223 - 4 - 2 smd package. the ic regulates an input voltage v i in the range of 5.5 v/10.5 v < v i < 45 v to v qrate d = 5 v/10 v. the maximum output current is more than 120 ma. the ic can be switched off via the inhibit input, which causes the current consumption to drop below 10 ua. the ic is shortcircuit - proof and incorporates temperature protection that disables the ic an overheating. features ? output voltage 5 v or 10 v ? output voltage tolerance 2 % ? 120 ma current capability ? very low current consumption ? low - drop voltage ? overtemperature protection ? reverse polarity proof ? wide temperature range ? suitable for use in a utomotive electronics ? inhibit dimensioning information on external components the input capacitor c i is necessary for compensating line influences. using a resistor of approx. 1 ohm ? in series with c i , the oscillating of input inductivity and input capacitance can be clamped. the output capacitor c q is necessary for the stability of the regulating circuit. stability is guaranteed at values c q 10 uf and an esr 10 ohm ? within the oper ating temperature range. ile42 66- 2 ile 4266 - 2 g p - sot223 - 4 - 2 t a = - 40 125 c
ile42 66-2 january, 2011, rev. 0 1 pin definitions and functions pin symbol function pin configuration 1 v i input voltage; block to ground directly at the ic with a ceramic capacitor. 2 inh inhibit; low - active input. 3 v q output voltage; block to groun d with a capacitor. c 10 uf. 4 gnd ground circuit description the device produces a precise reference voltage, that is very accurate due to resistor adjustment. a control amplifier compares the divided output voltage to this reference voltage and drives the base of the pnp series transistor through a buffer. saturation control as a function of the load current prevents any oversaturation of the power element. the ic also incorporates a number of protection circuitry for: ? overload ? overtemperat ure ? reverse polarity
ile42 66-2 january, 2011, rev. 0 1 maximum & absolute maximum ratings parameter symbol unit maximum ratings absolute maximum ratings min. max. min. max. junction temperature, j o c - 40 125 - 40 150 storage temperature, s o c - - - 50 150 input voltage, v i v 6 28 - 42 45 input current, i i a - internally limited - internally limited current on common pin ,i gnd ma - 15 50 - output voltage, u q v 4,9 5,1 - 1 16 output current (pi n 3) a - internally limited - internally limited inhibit voltage, u inh v - - - 42 45 thermal resistance junction case, r th jc o c /w - 25* - 25* thermal resistance junction ambient, r th ja , - on pcb, - without heat dissipater / ? - - 100* 220* - - 100* 220* * thermal resistance junction ambient for ic with heat dissipater is calculated by formula: r th ja = r th jc + r th ca , (1) r th jc - thermal resistance junction case, o c /w. application circuit and heat dissipater have to provide t j 125 . maximum power p tot , ? , dissipated by ic for t a , is calculated by formula: p tot = (125 - t a ) / r th ja , (2) 125 ? maximum permitable operating junction temperature, . * 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. electrical characteristics vi = 13.5 v; ? 40 o c ? tj 125 o c parame ter symbol limit values unit test condition min. typ. max. output voltage v q 4.9 5 5.1 v 5 ma ?i q 100 ma 6 v vi 28 v output - current limitation i q 120 150 ? ma ? current consumption i q = i i ? i q i q ? 0 10 ua v inh = 0 v; tj 100 o c ? ? 400 ua i q = 1 ma inhibit on ? 10 15 ma i q = 100 ma inhibit on drop voltage v dr ? 0.25 0.5 v i q = 100 ma 1) load regulation ? v q ? ? 40 mv i q = 5 to 100 ma v i = 6 v supply - voltage regulation ? v q ? 15 30 mv v i = 6 v to 28 v i q = 5 ma supply - voltage rejectio n svr ? 54 ? db fr = 100 hz, vr = 0.5 v ss inhibit inhibit on voltage v inh, on 3.5 ? ? v ? inhibit off voltage v inh, off ? ? ? 0.8 v ? inhibit current i inh 5 15 25 ua ve = 5 v 1) drop voltage = v i ? v q (measured when the output voltage vq has droppe d 100 mv from the nominal value obtained at v i = 13.5 v).
ile42 66-2 january, 2011, rev. 0 1 block diagram application circuit
ile42 66-2 january, 2011, rev. 0 1 p a c kage d imension p - sot 223 - 4 - 2
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