jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation description features applications sp619 high current power switch ? max r ds ( on ) .377 ohms ? overcurrent deactivation 800ma ? max leakage current less than 2a while deactivated ? small 6 pin sot-23 package ? built-in over-temperature protection ? wide input voltage range 2.5v to 7v ? ultra low cost handsets ? pda, dsc, mp3 players ? cell phones ? power distribution switch ? battery-charger circuit s o l v e d b y t m the sp6 9 is a low r ds ( on ) high current switch designed with precision cu r rent lim - iting to protect connected devices from damage due to a short circuit co n dition or against current surges that may cause the supply voltages to fall out of regula - tion. this switch operates from an input voltage range of 2.5v to 7v, making it ideal for 3v and 5v applications. the sp6 9 is also protected from thermal overload which limits power dissipation. in shutdown mode, the supply current drops to 2 a. 6 5 4 1 2 3 sp619 sot23-6 typical a pplication circuit vin vin cin .1f en 80k on/off gnd sp619 vout 100k cout .1f load
jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation 2 absolute maximum r atings recommended operatin g conditions unless otherwise specifed: v in = 2.5v - 7v, c in = 0. f, t a = -40c to + 85c these are stress ratings only and functional op - eration of the device at these ratings or any other above those indicated in the operation sections of the specifcations below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. parameter conditions min typ (note ) max units operating input voltage range 2.5 7 v overcurrent deactivation range en=1.5v 725 800 00 ma overcurrent duration be - fore deactivation en=1.5v 5.25 ms shutdown supply current v in =4.2v 2 a quiescent supply current en=1.5v v in =4.2v i out =0ma 350 a quiescent supply current en=1.5v v in =4.2v i out =725ma 5.25 ma r ds ( on ) v in =2.5v i out = 00ma en=1.5v .377 ? post fault output load for recovery enable=1.5v 0 5 23 k? post fault activation turn on time enable=1.5v 55 ms thermal shutdown die temperature sp69 will self recover when temperature drops below the trip point . 20 50 80 c thermal restart die tem - perature 90 20 35 c enable logic low driver is disabled .5 v enable pin logic high driver is active .655 .4 v turn on delay r l =100k?, c l = 0.0f (note 2,3) 600 s turn off delay r l =100k?, c l = 0.0f (note 2,4) 200 s rise time r l =100k?, c l = 0.0f (note 2) 00 s fall time r l =100k?, c l = 0.0f (note 2) 2500 s v in ...-0.3v to 7v storage temperature....... -65c to 50c junction temperature..................... ... 50c lead temperature (soldering, 0 sec).......300c esd rating human body model..2000v machine model....200v operating ratings thermal resistance sot23-6 junction to ambient... 9c junction to lead ...50c note 1: typicals are t j =25 c note 2: characterized, not 100% tested note 3: turn on delay is measured from the time the enable pin is turned on to the time it takes the output to rise to 10% of its fnal value. note 4: turn off delay is measured from the time the enable pin is turned to the time it takes for the output to fall to 90% of its current value.
3 jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation f ault and recover y truth ta ble* enable load temperature (tj) previous state switch current state/fault (note*) low x x x open off high < 800 ma < 63oc off closed normal high < 800 ma > 63oc off open thermal cutoff high > 800 ma < 63oc off open overcurrent high > 800 ma > 63oc off open thermal cutoff, overcurrent high < 15k? < 63oc overcurrent open load condition high < 15k? > 63oc overcurrent open thermal cutoff, overcurrent, load condition high > 15k? < 63oc overcurrent closed normal high > 15k? > 63oc overcurrent open thermal cutoff high < 15k? < 20oc thermal cutoff open load condition high < 15k? > 20oc thermal cutoff open load condition, thermal cutoff high > 15k? < 20oc thermal cutoff closed normal high > 15k? > 20oc thermal cutoff open thermal cutoff *note: this table is for fault conditions, not for continuous operation, else damage to the device may occur. in order to recover to the normal state after a thermal cutoff fault, the parts junction temper - ature must decrease below 120oc and the load on its output must be greater than 15k?. pin assi gnments pin number pin name function v in input power supply pin (2.5v to 7.0v) 2 gnd ground connection 3 enable a logic high turns on the switch 4 nc no connect 5 nc no connect 6 v out switch output
jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation 4 theor y of operation the sp6 9 is a switch capable of handling up to 800ma of current. 7v capability al - lows the user to have a wide input voltage range that covers the typical lithium bat - tery range as well as higher 5v input volt - age rails commonly found in usb power. the sp6 9 also can be used as a 3v or 5v power distribution switch. it is intended for power distribution applications where short circuits are likely to be encountered. short circuit operation when the sp6 9 enters a short circuit con - dition, the switch is disabled. the output of the sp6 9 will not restart until the out - put impedance is greater than 15k?. the enable pin can be used to re-enable the sp6 9 into any load condition that is not a fault condition. refer to the truth table on page 4 for more information on the differ - ent sp6 9 switch states. the typical deac - tivation time is about 2ms. enable the enable pin allows easy control of the sp6 9. the enable pin should not be en - abled high prior to a voltage being pres - ent on the input of the device. the enable pin should not exceed the input voltage by more than 0.1v due to an internal esd di - ode. doing so will affect the operation of the sp6 9 and could damage the device. in a typical application an 80k? resistor to gnd should be used on the enable pin. this resistor will pull the enable low when an enable signal is not present. this pre - vents the sp6 9 from falsely turning on. the enable pin can also be used to restart the part into a load condition that is high in current. please refer to the truth table on page 4 for more details. inrush current the sp6 9 is a simple resistive switch. when the switch is turned on into a highly capacitive load there could be a signifcant inrush current that can be encountered. at 6 volts in, the inrush current was about 250ma into a 00f capacitor. output voltage rise time the output voltage of the sp6 9 has an output capacitance dependency on the slope of v out . a simple rc circuit is cre - ated when the switch is turned on. equation 1 v(t)=v o +v in ( ( r ds ( on ) ? c out -t where v o is initial voltage condition typi - cally 0v v in is the input voltage r ds ( on ) is the switch resistance c out is the output capacitance for 4.2v v in and 00f output capacitance we get about 150ns delay in fgure 2. 4.17 3.33 2.5 1.67 0.83 0 0 0.33 0.67 1 1.33 1.67 2 time in us v out this is comparable to actual measured value in fgure 3. -e
5 jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation overtemperature protection the sp6 9 has built-in overtemperature protection to protect the part against dam - age if the die temperature gets too hot. the typical thermal cutoff is about 50oc. the part will self recover if the temperature drops below the thermal restart threshold of about 20oc. layout considerations the input and output decoupling capacitors should be placed as close as possible to the input and output pins. the gnd pin should be stitched to the gnd plain to help with thermal performance. the input and output traces should be as large as possible. the 100k? is also recommended in the design and should be placed close to the output de - coupling cap. theor y of operation 146-6642-00 vin gnd on/off vout u1 sp619 s o l v e d b y t m recommended layout
jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation 6 6 pin sot-23
7 jul23-07 rev k sp69 high current power switch ? 2007 sipex corporation sipex corporation headquarters and sales offce 233 south hillview drive milpitas, ca 95035 7(/ ); sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability arising out of the applica - tion or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. ordering information for availability of m temperatures (-40 to + 25oc) or in other packages contact factory. /tr = tape and reel. s o l v e d b y t m part number temperature range package type 63(./ from -40 to +85oc lead free 6 pin sot23 63(./75 from -40 to +85oc lead free 6 pin sot23 )ruixuwkhudvvlvwdqfh (pdlo sipexsupport@sipex.com 6xssruwsdjh kwwsvlshfrpfrqwhqwdvss vxssruw 6lshssolfdwlrqrwhv kwwsvlshfrpdssolfdwlrqrwhvdvs
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