vishay siliconix sip4613a, sip4613b document number: 69998 s-82461-rev. b, 06-oct-08 www.vishay.com 1 protected 1-a high-side load switch description sip4613a, sip4613b is a protected highside power switch. it is designed to operate from voltages ranging from 2.4 v to 5.5 v and handle a continuous current of 1 a. the user settable current limit protects the input supply voltage from excessive load currents that might cause a system failure. sip4613a, sip4613b has a low shutdown supply current, which is reduced to less than 1 a. a flag output c l is available to indicate fault conditions such as output short and thermal protection. in addition to current limit, the sip4613a, sip4613b is protected by undervoltage lockout and thermal shutdown. the sip4613a, sip4613b is available in a lead (pb)-free 6-pin powerpak ? tsc75-6 for operation over the industrial temperature range of - 40 c to 85 c. features ? 1 a continuous output current ? 2.4 v to 5.5 v supply voltage range ? user settable current limit level ? low quiescent current ? undervoltage lockout ? thermal shutdown protection ? 4 kv esd rating-hbm applications ? peripheral ports ?hot swap ? notebook computers ? pdas typical application circuit 2.4 v to 5.5 v ena b le c l g n d g n d load i n c l o n /o n g n d set out sip4613a sip4613b c i n 1 f 5k r set c out 0.47 f r cl rohs compliant
www.vishay.com 2 document number: 69998 s-82461-rev. b, 06-oct-08 vishay siliconix sip4613a, sip4613b notes: a. derate 7.6 mw/c above t a = 70 c. b. device mounted with all leads soldered or welded to pc board. stresses beyond those listed under ?absolute maximum ratings? ma y cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other condit ions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. notes: a. the algebraic convention whereby the most negative value is a minimum and the most positive a maximum (- 40 c to 85 c). b. typical values are for design aid only, not guaranteed nor subject to production testing. c. guaranteed by design. absolute maximum ratings all voltages referenced to gnd = 0 v parameter limit unit v in , v on , v on - 0.3 to 6 v i max 2a storage temperature - 65 to 150 c operating junction temperature - 40 to 150 c power dissipation a , powerpak tsc75-6 420 mw thermal impedance ( ja ) b , powerpak tsc75-6 131 c/w recommended operating range all voltages referenced to gnd = 0 v parameter limit unit in 2.4 to 5.5 v operating temperature range - 40 to 85 c specifications a parameter symbol test conditions unless specified in = 5 v, t a = - 40 c to 85 c limits min. a typ. b max. a unit power supplies supply voltage v in 2.4 5.5 v quiescent current i q in = 5 v, on /on = active, l out = 0 a 100 a shutdown current i sd in = 5 v, on /on = inactive 1 switch off current i s(off) in = 5 v, on /on = inactive, v out = 0 v, t a = 25 c 1 enable inputs on /on high v ih in = 2.4 v to 5.5 v 1.5 v on /on low v il 0.5 on /on leakage current i lh on /on = 5 v 1a turn off time t off in = 5 v, r l = 10 0.5 5 s tu r n o n t i m e t on 55 120 output on-resistance r ds in = 5 v, t a = 25 c 150 225 m in = 3 v, t a = 25 c 180 250 current limit i l r set = 6.81 k 0.375 0.5 0.625 a minimum current limit i l(min) 125 ma output short circuit current i sh r set = 6.81 k 0.350 0.5 0.650 a current limit response time t resp in = 5 v 4 s undervoltage lockout uvlo threshold v uvlo rising edge 1.8 2.4 v uvlo hysteresis v hyst 0.05 thermal shutdown thermal shutdown threshold t 165 c hysteresis t hyst 20
document number: 69998 s-82461-rev. b, 06-oct-08 www.vishay.com 3 vishay siliconix sip4613a, sip4613b pin configuration, ordering information xx = lot code w = work week code functional block diagram ordering information part number marking temperature range package sip4613advp-t1-e3 m3xxx - 40 c to 85 c powerpak tsc75-6 SIP4613BDVP-T1-E3 m4xxx - 40 c to 85 c powerpak tsc75-6 pin description pin number name function 1 out switch output 2 gnd ground pin 3 set current limit level set pin. the level is determinied by the value of a resistor c onnected from this pin to gnd 4on /on shutdown pin. on /on, active low on the sip4613a to turn on the switch, active high to turn off sip4613a active high on the sip4613b to turn on the switch, active low to turn off sip4613b 5 c l c l pin will go low if sip4613 is operating in current limited condition 6 in input supply voltage and switch input out g n d set i n c l o n /o n i n c l o n /o n out g n d set to p v ie w bottom v ie w tsc75-6 package figure 1. sip4613a/b block diagram i n out c l set g n d o n /o n n w /l w /l under v oltage locko u t thermal sh u tdo w n reference v oltage
www.vishay.com 4 document number: 69998 s-82461-rev. b, 06-oct-08 vishay siliconix sip4613a, sip4613b detailed description the sip4613a, sip4613b limits lo ad current by sampling the pass transistor current and passing that through an external resistor, r set . the voltage across r set , v set , is then compared with an internal reference voltage, v ref . in the event that load current surp asses the set limit current, v set will exceed v ref causing the pass transistor gate voltage to increase, thereby reducing the gat e to source voltage of the pmos switch and regulating its current back down to i limit . setting the current limit level setting the current limit level on the sip4613a, sip4613b requires some care to ensure the maximum current required by the load will not trigger the current limit circuitry. the minimum current limit threshold should be determined by taking the maximu m current required by the load, i load , and adding 25 % headroom. the sip4613a, sip4613b has a current limit tolerance of 25 %, which is largely a result of process variations from part to part, and also temperature and v in /v out variances. thus, to ensure that the actual current limit is never below the desired current limit a 1/0.80 = 1.25 coefficient needs to be added to the calculations. knowing the maximum load current required, the value of r set is calculated as follows. r set = r set coefficient/i limit where i limit = (i load x 1.25) x 1.20 and r set coefficient is 3460 for a 500 ma current limit. for typical r set coefficient values given a limit current refer to the "typical characteristics" section. operation at current limit and thermal shutdown in the event that a load higher than i limit is demanded of the sip4613a, sip4613b the load current will stay fixed at the current limit established by r set . however, since the required current is not supplied, the voltage at out will drop. the increase in v in - v out will cause the chip to dissipate more heat. the power dissipation for the sip4613a, sip4613b can be expressed as p = i load x (v in - v out ) once this exceeds the maximum power dissipation of the package, the die temperature will rise. when the die temperature exceeds an over-t emperature limit of 165 c, the sip4613a, sip4613b will shut down until it has cooled down to 145 c, before starting up again. as can be seen in the figure below, the sip4613a, sip4613b will continue to cycle on and off until the load is reduced or the part is turned off (see figure 4 on next page). the maximum power dissipation in any application is dependant on the maximum junction temperature, t j(max) = 125 c , the junction-to-ambient thermal resistance for the tsc75-6 package, j-a = 131 c/w, and the ambient temperature, t a , which may be formulaically expressed as: it then follows that assuming an ambient temperature of 70 c, the maximum power dissipation will be limited to about 419 mw. there is c l pin designed to indicate the current limit status of sip4613. a typical 5 k resistor is required to connect between c l pin and in pin. in the event of the output over load, the current limit flag pin c l will go low to indicate the current limit status of the devi ce. figure 2 sh ows the voltage on c l pin go low after output short. figure 2 the voltage signal in c l pin is not only used to indicate the output short circuit status. it is also used to indicate the thermal protection status of the device. once the thermal protection is activated in the severe output short circuit condition, the voltage signal on the c l pin will run into the thermal protection cycling. figure 3 shows the voltage waveform of c l pin after activation of the thermal protection circuit due to the severe short circuit status of the device?s output. figure 3 the thermal protection is the final protection to the device. the device will be completely shut down including the open drain current limit indicator pin c l until the device temperature drop below 145 c. 131 125 (max) (max) a a j a j t t t p - = - = - v out (500 m v /di v ) cl (500 m v /di v ) v out = 2.4 v r set = 6. 8 1 k 50 s/di v v out (2 v /di v ) cl (2 v /di v ) v out = 5.5 v r set = 6. 8 1 k 20 ms/di v
document number: 69998 s-82461-rev. b, 06-oct-08 www.vishay.com 5 vishay siliconix sip4613a, sip4613b reverse voltage the sip4613a, sip4613b is designed to control current flowing from in to out. if the voltage on out is raised higher than in current will flow from out to in but the current limit function will not be available, as can be inferred from the block diagram in figure 1. thus, in applications were out is used to charge in, careful considerations must be taken to limit current through the device and protect it from becoming damaged. figure 4. current over load condition. load switch turned on with 0.1 load at time = 0 ms. 20 ms/di v r set = 3.32 k v out = (1 v /di v ) i out (500 ma/di v )
www.vishay.com 6 document number: 69998 s-82461-rev. b, 06-oct-08 vishay siliconix sip4613a, sip4613b typical characteristics 25 c, unless otherwise noted quiescent current vs. temperature output voltage vs. output current off supply current vs. temperature temperat u re (c) q u iescent c u rrent ( a) 0 10 20 30 40 50 60 70 - 40 10 60 110 160 i out ( v ) v out ( v ) 0 1 2 3 4 5 6 0 0 .1 0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 v out = 5.5 v r set = 6. 8 1 k v out = 3.9 v v out = 2.4 v temperat u re (c) off s u pply c u rrent ( a) 10 -6 10 -5 10 -3 10 -2 10 -1 1 - 40 - 20 0 20 40 60 8 0100120 quiescent current vs. input voltage r ds(on) vs. temperature off switch current vs. temperature v i n - inp u t v oltage ( v ) q u iescent c u rrent ( a) 0 5 10 15 20 25 30 35 40 0123456 70 100 130 160 190 220 250 - 40 - 20 0 20 40 60 8 0 100 120 r ds(on) - (m ) temperat u re (c) v i n = 3 v v i n = 5 v i out = 100 ma temperat u re (c) off s w itch c u rrent ( a) 0.001 0.01 0.1 1.0 10.0 - 40 - 20 0 20 40 60 8 0 100 120
vishay siliconix sip4613a, sip4613b document number: 69998 s-82461-rev. b, 06-oct-08 www.vishay.com 7 typical characteristics 25 c, unless otherwise noted turn-on vs. temperature r l = 10 , c l = 0.47 f v ih and v il vs. v in 0 20 40 60 80 100 120 - 40 - 20 0 20 40 60 80 100 temperature (c) turn-on time (s) v in = 3 v v in = 5 v v in - input voltage (v) v ih and v il (v) v il 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00 1.01 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v ih turn-off vs. temperature r l = 10 , c l = 0.47 f r set vs. i limit - 40 - 20 0 20 40 60 8 0100 temperat u re c) t u rn-on time ( s) 0 0.5 1 v i n = 5 v v i n = 3 v i limit (a) 1 10 100 0 1 1 1 . 0 r set (k ) r set coefficient vs. i limit i limit (a) r set i limit prod u ct (k v ) 3.0 4.0 0 0 .2 5 0 .5 0 .7 5 3.9 3. 8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 current limit vs. temperature - 4 - 3 - 2 - 1 0 1 2 3 4 - 40 - 20 0 20 40 60 80 100 120 r set = 8 k v in - v out = 0.5 v temperature (c) current limit (%)
www.vishay.com 8 document number: 69998 s-82461-rev. b, 06-oct-08 vishay siliconix sip4613a, sip4613b typical characteristics 25 c, unless otherwise noted typical waveforms vishay siliconix maintains worldwide manufacturing capability. products may be manufactured at one of several qualified locatio ns. reliability data for silicon technology and package reliability represent a composite of all qualified locations. for related documents such as package/tape drawings, part marking, and reliability data, see http://www.vishay.com/ppg?69998 . r ds(on)_reverse vs. temperature r ds(on) - (m ) temperature (c) 50 100 150 200 250 - 40 - 20 0 20 40 60 80 100 120 i in = 100 ma v out = 5 v r ds(vout-in) vs. current 0 50 100 150 200 250 0 100 200 300 400 500 600 700 800 900 1000 l in (ma) r ds(on) - (m ) v out = 5 v turn on short circuit through 0.3 , v in = 3.3 v 20 s/div v out (1 v/div) i out = 500 ma on (1 v/div) 10 s/di v i out = (1 a/di v ) v i n (1 v /di v ) v out (1 v /di v ) turn off short circuit through 0.3 , v in = 5 v 20 s/div v out (1 v/div) i out = 500 ma on (1 v/div) 10 s/di v i out = (2 a/di v ) v i n (1 v /di v ) v out (1 v /di v )
vishay siliconix package information document number: 74416 02-oct-06 www.vishay.com 1 dim millimeters inches min nom max min nom max a 0.50 0.55 0.65 0.020 0.022 0.026 a1 0 - 0.05 0 - 0.002 b 0.20 0.25 0.30 0.008 0.010 0.012 c 0.10 0.15 0.20 0.006 0.008 0.010 d 1.55 1.60 1.65 0.0061 0.063 0.065 d1 0.95 1.00 1.05 0.037 0.039 0.041 e 1.55 1.60 1.65 0.061 0.063 0.065 e1 0.55 0.60 0.65 0.022 0.024 0.026 e 0.50 bsc 0.020 bsc e1 1.00 bsc 0.039 bsc k 0.15 - - 0.006 - - k2 0.20 - - 0.008 l 0.20 0.25 0.30 0.008 0.010 0.012 ecn: s-61919-rev. a, 02-oct-06 dwg: 5955 powerpak tsc75-6l (power ic only) ? top view pin 1 dot by marking ppak tsc75 (1.6 x 1.6 mm) k2 k2 bottom view e1 side view a a1 c d e e b d1 exposed pad e1 exposed pad k k pin3 pin 2 pin1 l pin4 pin 5 pin6
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