vishay siliconix sip4610a/b document number: 73233 s-71061?rev. j, 21-may-07 www.vishay.com 1 protected 1-a high-side load switch applications ? peripheral ports ? hot swap ? notebook computers ? pdas 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 ? compatible with aat4610a ? 4 kv esd rating-hbm description sip4610a/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. sip4610a/b has a low quiescent current of 9 a and in shutdown the supply current is reduced to less than 1 a. in addition to current limit, the sip4610a/b is protected by undervoltage lockout and thermal shutdown. there are two versions of the sip4610. the sip4610a has an active low enable input, while the sip4610b has an active high enable input. the sip4610a/b is available in a lead (pb)-free 5-pin thin sot-23 package for operation over the industrial temperature range of - 40 to 85 c. typical application diagram on/on out gnd enable 2.4 to 5.5 v in set r set c out c in gnd load sip4610a/b gnd rohs compliant
www.vishay.com 2 document number: 73233 s-71061?rev. j, 21-may-07 vishay siliconix sip4610a/b notes: a. derate 5.5 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 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 , sot-23 5-pin 305 mw thermal impedance ( ja ) b , sot-23 5-pin 180 c/w recommended operating range (all voltages refere nced 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 925 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 1 enable inputs on /on high v ih in = 2.4 v to 5.5 v 2.0 v on /on low v il 0.8 on /on leakage current i lh on /on = 5 v 1a turn off time t off in = 5 v, r l = 10 11 21 s tu r n o n t i m e t on 65 200 output on-resistance r ds in = 5 v, t a = 25 c 145 180 m in = 3 v, t a = 25 c 190 230 current limit i l r set = 6.8 k 0.75 1 1.25 a minimum current limit i l(min) 130 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: 73233 s-71061?rev. j, 21-may-07 www.vishay.com 3 vishay siliconix sip4610a/b pin configuration, ordering information, and truth table xx = lot code w = work week code functional block diagram ordering information parameter marking temperature range package SIP4610ADT-T1-E3 m1wxx - 40 to 85 c thin sot23-5 sip4610bdt-t1-e3 m2wxx eval kit temperature range board type sip4610dt - 40 to 85 c 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 connected from this pin to gnd. 4on /on shutdown pin. on , active low on the sip4610a and on, active high on the sip4610b. 5 in input supply voltage and switch input. 3 2 thin sot-23, 5-pin 1 4 5 out gnd set in on/on top view figure 1. sip4610 block diagram in on (sip4610a) on (sip4610b) out gnd + _ thermal shutdown reference voltage set nw/l w/l under voltage lockout + _
www.vishay.com 4 document number: 73233 s-71061?rev. j, 21-may-07 vishay siliconix sip4610a/b detailed description the sip4610 limits load 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 sip4610 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 sip4610 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 curr ent 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 7100 for a 1 a 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 sip4610, the load current will st ay 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 sip4610 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 sip4610 will shut down until it has cooled down to 145 c, before starting up again. as can be seen in the figure below, the sip4610 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 sot23-5 package, j-a = 180 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 305 mw. reverse voltage the sip4610 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. 180 125 (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.
document number: 73233 s-71061?rev. j, 21-may-07 www.vishay.com 5 vishay siliconix sip4610a/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 80 100 12 0 temperature (?) ( t n e r r u c t n e c s e i u q) ? 0 100 200 300 400 500 600 700 800 900 1000 012345 r set = 16.2 k v out - output voltage (v) ) a ( t n e r r u c t u p t u o temperature (?) ( t n e r r u c y l p p u s f f o) ? 60 120 0.00001 1 - 40 - 20 0 20 40 80 100 0.0001 0.001 0.01 0.1 quiescent current vs. input voltage r ds(on) vs. temperature off switch current vs. temperature 0 4 8 12 16 20 012 3 456 v in ? inp u t volt a ge (v) a) ( t n e r r u c t n e c s e i u q 0 50 100 150 200 250 0204060 8 0 100 12 0 r ) n o ( s d m ( ) temper a t u re (c) v in = 3 v v in = 5 v temperature (?) ( t n e r r u c h c t i w s f f o) ? 60 120 0.00001 1 10 - 40 - 20 0 20 40 80 100 0.0001 0.001 0.01 0.1
www.vishay.com 6 document number: 73233 s-71061?rev. j, 21-may-07 vishay siliconix sip4610a/b typical characteristics 25 c, unless otherwise noted turn-on vs. temperature r l = 10 , c l = 0.47 f v ih vs. v il vs. v in 0 20 40 60 80 100 120 - 40 - 20 0 20 40 60 80 100 v in = 3 v v in = 5 v ( e m i t n o - n r u t ?) temperature (?) 0.0 0.5 1.0 1.5 2.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in ?input voltage (v) v n o ) v ( turn-off vs. temperature r l = 10 , c l = 0.47 f r set vs. i limit 5 7 9 11 13 15 - 40 - 20 0 20 40 60 80 100 v in = 5 v v in = 3 v ( e m i t f f o - n r u t s temperature (?) 100 0.1 1 10 1 10 i limit (a) r t e s k () r set coefficient vs. i limit 6 7 8 9 r t e s i t i m i l ) k ( t c u d o r p 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 i limit (a) current limit vs. temperature - 4 - 3 - 2 - 1 0 1 2 3 4 - 50 - 25 0 25 50 75 100 12 5 ) % ( t i m i l t n e r r u c temperature (?) r set = 22.1 k v in ?v out = 0.5 v
vishay siliconix sip4610a/b document number: 73233 s-71061?rev. j, 21-may-07 www.vishay.com 7 typical characteristics 25 c, unless otherwise noted typical waveforms vishay siliconix maintains worldwide manufac turing capability. products ma y be manufactured at one of several qualified locatio ns. reliability data for silicon tech- nology and package reliability represent a composite of all qua lified locations. for related documents such as package/tape dra wings, part marking, and reliability data, see http://www.vishay.com/ppg?73233 . rds (v out to v in ) vs. current 0 50 100 150 200 250 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 current (a) rds (m ) v = 5 v out rds (v out to v in ) vs. temperature 0 50 100 150 200 250 - 40 - 20 0 20 40 60 80 100 temperature (?) v = 5 v i(v to v ) = 1 a out out in rds (m ) turn on short circuit through 0.3 , v in = 3.3 v 10 s /div on 2 v/div out 2 v/div r l = 10 c l = 0.47 f 2 ?/div v in 2 v/div lout 2 a/div out 2 v/div v turn off short circuit through 0.3 , v in = 5 v on , 2 v/div out , 2 v/div 10 s /div r l = 10 c l = 0.47 f 2 ?/div v in 2 v/di v lout 2 a/div v 2 v/div out
e1 e1 e ? b ? c m 0.15 b a b e 54 13 213 2 64 5 e1 e1 e ? b ? c m 0.15 b a b e d ? c ? a1 a2 a seating plane ? a ? c 0.08 l r r q 4x 1 0.17 ref c seating plane gauge plane l 2 (l1) 4x 1 sot23-5l format sot23-6l format package information vishay siliconix document number: 72821 29-jan-04 www.vishay.com 1 thin sot-23 : 5- and 6-lead (power ic only) millimeters inches dim min nom max min nom max a 0.91 1.00 1.10 0.036 0.039 0.043 a1 0.01 0.05 0.10 0.0004 0.002 0.004 a2 0.90 0.95 1.00 0.035 0.037 0.039 b 0.30 0.32 0.45 0.012 0.013 0.018 c 0.10 0.15 0.20 0.004 0.006 0.008 d 2.90 3.05 3.10 0.114 0.120 0.122 e 2.70 2.85 2.98 0.106 0.112 0.117 e1 1.525 1.65 1.70 0.060 0.065 0.067 e 0.95 bsc 0.0374 bsc e1 1.80 1.90 2.00 0.070 0.075 0.080 l 0.30 0.40 0.60 0.012 0.016 0.024 l1 0.60 ref 0.024 ref l2 0.25 bsc 0.010 bsc r 0.10 ? ? 0.004 ? ? q 0 4 8 0 4 8 1 4 10 nom 12 4 10 nom 12 ecn: s-40083?rev. a, 02-feb-04 dwg: 5926
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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