november 1998 fdc6329 l integrated load switch general description features absolute maximum ratings t a = 25c unless otherwise noted symbol parameter fdc6329 l units v in input voltage range (note 1) 2.5 - 8 v v on/off on/off voltage range 1.5 - 8 v i l load current - continuous (note 2) 2.5 a - pulsed 10 p d maximum power dissipation (note 2) 0.7 w t j ,t stg operating and storage temperature range -55 to 150 c esd electrostatic discharge rating mil-std-883d human body model (100pf/1500ohm) 6 kv thermal characteristics r q ja thermal resistance, junction-to-ambient (note 2) 180 c/w r q jc thermal resistance, junction-to-case (note 2) 60 c/w fdc6329 l rev.c this device is particularly suited for compact p ower m anagement in portable electronic equipment where 2.5 v to 8 v input and 2.5 a output current capability are needed. this load switch integrates a small n -c hannel p ower mosfet (q1) which drives a large p -c hannel p ower mosfet (q2) in one tiny supersot tm -6 package. v drop =0.2 v @ v in =5v, i l =2.8 a. r (on ) = 0.07 w v drop =0.2 v @ v in =2.5 v, i l = 1.9 a. r (on ) = 0.105 w. control mosfet (q1) includes zener protection for esd ruggedness (>6kv human body model). high performance trench technology for extremely low on-resistance. supersot tm -6 package design using copper lead frame for superior thermal and electrical capabilities. see application circuit 1 5 6 3 2 q2 q1 4 v , c out 1 r 2 v , r in 1 on/off v r , c 1 1 v , c out 1 in out on/off equivalent circuit v drop + - supersot -6 tm .329 pin 1 sot-23 supersot t m -8 soic-16 so-8 sot-223 supersot t m -6
electrical characteristics (t a = 25c unless otherwise noted) symbol parameter conditions min typ max units off characteristics i fl forward leakage current v in = 8 v, v on/off = 0 v 1 a on characteristics (note 3 ) v drop conduction voltage v in = 5 v, v on/off = 3.3 v , i l = 2.8 a 0.12 0.2 v v in = 2.5 v, v on/off = 3.3 v , i l = 1.9 a 0.14 0.2 r (on) q 2 - static on-resistance v gs = -5 v, i d = -2.5 a 0.047 0.07 w v gs = -2 .5 v, i d = -2.0 a 0.073 0.105 i l load current v drop = 0.2 v , v in = 5 v, v on/off = 3.3 v 2.8 a v drop = 0.2 v , v in = 2.5 v, v on/off = 3.3 v 1.9 notes: 1. range of v in can be up to 8 v, but r 1 and r 2 must be scaled such that v gs of q2 does not exceed -8 v. 2. r q ja is the sum of the junction-to-case and case-to-ambient thermal resistance where the case thermal reference is defined as the so lder mounting surface of the drain pins. r q jc is guaranteed by design while r q ca is determined by the user's board design. 3 . pulse test: pulse width < 300s, duty cycle < 2.0%. fdc6329 l load switch application external component recommendation: for applications where co 1 m f. for slew rate control, select r2 in the range of 1k - 4.7k w . for additional in-rush current control, c1 1000pf can be added. select r1 so that the r1/r2 ratio ranges from 10 - 100. r1 is required to turn q2 off. fdc6329 l rev.c
fdc6329 l rev.c 0.00001 0.0001 0.001 0.01 0.1 1 10 100 300 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 t , time (sec) transient thermal resistance 1 single pulse d = 0.5 0.1 0.05 0.02 0.01 0.2 duty cycle, d = t / t 1 2 r (t) = r(t) * r r = see note 2 q ja q ja q ja t - t = p * r (t) q ja a j p(pk) t 1 t 2 r(t), normalized effective figure 4 . transient thermal response curve. thermal characterization performed using the conditions described in note 2. transient thermal response will change depending on the circuit board design . typical electrical characteristics (t a = 25 o c unless otherwise noted ) 0 0.6 1.2 1.8 2.4 3 0 0.05 0.1 0.15 0.2 i , (a) v ,(v) drop l v = 5v v = 1.5 - 8v pw =300us, d 2% on/off in t = 125c j t = 25c j 0 0.6 1.2 1.8 2.4 3 0 0.05 0.1 0.15 0.2 i , (a) v , (v) drop l v = 2.5v v = 1.5 - 8v pw =300us, d 2% on/off in t = 125c j t = 25c j 1 2 3 4 5 0 0.04 0.08 0.12 0.16 0.2 v , (v) r ,(ohm) in i = 1a v = 1.5 - 8v pw =300us, d 2% on/off l (on) t = 125c j 25c figure 1 . conduction voltage drop v ariation w ith load current . figure 2 . conduction voltage drop v ariation w ith load current . figure 3 . on-resistance variation with i nput voltage .
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench? qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8
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