vishay siliconix sip4612a/b document number: 74481 s-80971-rev. b, 24-apr-08 www.vishay.com 1 protected 1-a high-side load switch description sip4612a/b 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. sip4612a/b has a low quiescent current of 11 a and in shutdown the supply current is reduced to less than 1 a. in addition to current limit, the sip4612a/b is protected by undervoltage lockout and thermal shutdown. the sip4612a/b 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 on/on out gnd enable 2.4 to 5.5 v in set r set c out c in gnd load sip4612a/b gnd 1 ? 0.47 ? rohs compliant
www.vishay.com 2 document number: 74481 s-80971-rev. b, 24-apr-08 vishay siliconix sip4612a/b 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 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 11 25 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, l out = 100 ma 150 225 m in = 3 v, t a = 25 c, l out = 100 ma 180 250 current limit i l r set = 6.81 k 0.375 0.5 0.625 a minimum current limit i l(min) 85 ma 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: 74481 s-80971-rev. b, 24-apr-08 www.vishay.com 3 vishay siliconix sip4612a/b pin configuration, ordering information xx = lot code w = work week code functional block diagram ordering information parameter marking temperature range package sip4612advp-t1-e3 m1wxx - 40 c to 85 c powerpak tsc75-6 SIP4612BDVP-T1-E3 m2wxx - 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 conn ected from this pin to gnd 4on /on shutdown pin. on /on, active low on the sip4612a to turn on the switch, active high to turn off sip4612a active high on the sip4612b to turn on the switch, active low to turn off sip4612b 5 nc no connection 6 in input supply voltage and switch input out gnd set top view in nc on/on tsc75-6 package in nc on/on bottom view out gnd set figure 1. sip4612a/b block diagram in on/on out gnd + - thermal shutdown reference voltage set nw/l w/l under voltage lockout + -
www.vishay.com 4 document number: 74481 s-80971-rev. b, 24-apr-08 vishay siliconix sip4612a/b detailed description the sip4612a/b limits load cu rrent 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 sip4612a/b 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 maximum current required by the load, i load , and adding 25 % headroom. the sip4612a/b 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 1/0.75 = 1.33 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 1.33) x 1.25 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 sip4612a/b, 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 sip4612a/b can be expressed as p = i load x (v in - v out ) once this exceeds the maximum power dissipation of the package, the die temperatur e will rise. when the die temperature exceeds an over-t emperature limit of 165 c, the sip4612a/b will shut down until it has cooled down to 145 c, before starting up again. as can be seen in the figure below, the sip4612a/b will continue to cycle on and off until the load is reduced or the part is turned off (see figure 2). 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. reverse voltage the sip4612a/b 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 c an 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. 131 125 (max) (max) a a j a j t t t p ? = ? = ? figure 2. current over load condition. load switch turned on with 0.1 load at time = 0 ms. 20 ms/div r set = 3.32 k v out = (1 v/div) i out (500 ma/div)
document number: 74481 s-80971-rev. b, 24-apr-08 www.vishay.com 5 vishay siliconix sip4612a/b typical characteristics 25 c, unless otherwise noted quiescent current vs. temperature output current vs. v out off supply current vs. temperature 0 4 8 12 16 20 - 40 - 20 0 20 40 60 8 0 100 120 temperat u re (c) q u iescent c u rrent ( a) 0 1 2 3 4 5 6 0 0.5 1 1.5 2 i out (a) v out ( v ) v out = 4.2 v , r set = 4.32 k v out = 5 v , r set = 6. 8 1 k temperat u re (c) off s u pply c u rrent ( a) 0.001 0.01 0.1 1.0 10.0 - 40 - 20 0 20 40 60 8 0 100 120 quiescent current vs. input voltage r ds(on) vs. temperature off switch current vs. temperature 0 5 10 15 20 0123456 v i n - inp u t v oltage ( v ) q u iescent c u rrent ( a) 70 100 130 160 190 220 250 - 40 - 20 0 20 40 60 8 0 100 120 - 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
www.vishay.com 6 document number: 74481 s-80971-rev. b, 24-apr-08 vishay siliconix sip4612a/b 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 8 0 100 120 - 40 - 20 0 20 40 60 8 0 100 temperat u re (c) t u rn-on time ( s) v i n = 3 v v i n = 5 v v i n - inp u t v oltage ( v ) v ih and v il ( v ) v il 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.9 8 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 0.0 0.25 0.50 0.75 1.0 - 40 - 20 0 20 40 60 8 0100 temperat u re (c) t u rn-off time ( s) v i n = 3 v v i n = 5 v i limit (a) 1 10 100 0 1 1 1 . 0 r set (k ) r set coefficient vs. i limit 2 3 4 5 0.00 0.25 0.50 0.75 1.00 i limit (a) r set i limit prod u ct (k v ) current limit vs. temperature - 4 - 3 - 2 - 1 0 1 2 3 4 - 40 - 20 0 20 40 60 8 0 100 120 r set = 8 k v i n - v out = 0.5 v temperat u re (c) c u rrent limit ( % )
vishay siliconix sip4612a/b document number: 74481 s-80971-rev. b, 24-apr-08 www.vishay.com 7 typical characteristics 25 c, unless otherwise noted typical waveforms r ds(on)_reverse vs. temperature r ds(on) - (m ) temperat u re (c) 50 100 150 200 250 - 40 - 20 0 20 40 60 8 0 100 120 i i n = 500 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 8 00 900 1000 l i n (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) 1 ?/div v out (1 v/div) i out = (2 a/div) v in (1 v/div) turn off short circuit through 0.3 , v in = 5 v 20 ?/div v out (1 v/div) i out = 500 ma on (1 v/div) 1 ?/div v out (1 v/div) i out = (2 a/div) v in (1 v/div)
www.vishay.com 8 document number: 74481 s-80971-rev. b, 24-apr-08 vishay siliconix sip4612a/b 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?74481 . current limit v in = 3.7 v, r set = 4.32 k , i out : 100 ma to 800 ma 100 s/di v v out 500 m v /di v i out 200 ma/di v i out v out
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
document number: 91 000 www.vishay.com revision: 11-mar-11 1 disclaimer legal disclaimer notice vishay all product, product specifications and data ar e subject to change without notice to improve reliability, function or design or otherwise. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectivel y, vishay), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained in any datasheet or in any o ther disclosure relating to any product. vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. to the maximum extent permitted by applicab le law, vishay disc laims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, incl uding without limitation specia l, consequential or incidental dama ges, and (iii) any and all impl ied warranties, including warran ties of fitness for particular purpose, non-infringement and merchantability. statements regarding the suitability of pro ducts for certain types of applications are based on vishays knowledge of typical requirements that are often placed on vishay products in gene ric applications. such statements are not binding statements about the suitability of products for a partic ular application. it is the customers responsibility to validate that a particu lar product with the properties described in th e product specification is su itable for use in a particul ar application. parameters provided in datasheets an d/or specifications may vary in different applications and perfo rmance may vary over time. all operating parameters, including typical pa rameters, must be validated for each customer application by the customers technical experts. product specifications do not expand or otherwise modify vishays term s and conditions of purchase, including but not limited to the warranty expressed therein. except as expressly indicated in writing, vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the vishay product co uld result in person al injury or death. customers using or selling vishay products not expressly indicated for use in such applications do so at their own risk and agr ee to fully indemnify and hold vishay and it s distributors harmless from and against an y and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that vis hay or its distributor was negligent regarding the design or manufact ure of the part. please contact authorized vishay personnel t o obtain written terms and conditions regarding products designed fo r such applications. no license, express or implied, by estoppel or otherwise, to any intelle ctual property rights is gran ted by this document or by any conduct of vishay. product names and markings noted herein may be trademarks of their respective owners.
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