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single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 1 - htc features ? 3.0 v to 5.5v operating range ? 1.0a continuous current ? 2 .2a accurate current limit ing ? 1.6a short circuit current ? 8 0ua typical on - state supply current ? 1ua maximum standby supply current ? independent open - drain fault flag pins ? thermal shutdown protec tion ? under voltage lockout(uvlo) ? tj2110h : active high version ? tj2110l : active low version ? ul recognized. ul file no. e347996 application ? usb peripherals ? general purpose power switching ? acpi power distribution ? notebook pcs ? pdas ? hot plug - in power supplies descripsion the tj2110 x is single - channel high - side mosfet switch optimized for general - purpose power distribution requiring circuit protection. the tj2110 series support the following usb requirements. the tj2110 series suppl y up to 1.0 a as required by usb downstream devices. s witchs low on - resistance meets usb voltage drop requiremen t . fault current is limited to typically 2.2 a. flag output indicate fault condition to the local usb controller. soft - start prevents the transient voltage drop on the upst ream port that can occur when the switch is enabled in bus - powered applications. under voltage lockout (uvlo) feature disables the output switches until a valid input voltage. also the tj2110 include thermal shutdown to prevent switch failure from high - cur rent loads. sot23 - 5l pkg sop8 pkg msop8 pkg ordering information device package tj2110hgsf5 so t 23 - 5l tj2110lgsf5 tj2110hgd sop8 tj2110lgd tj2110hgmd msop8 TJ2110LGMD
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 2 - htc abso lute maximum ratings (note 1) characteristic symbol min max unit supply voltage v in - 0.3 6.0 v enable input voltage (note 2) v en - 0.3 6.0 v fault flag voltage v flg - 6. 0 v fault flag current i flag - 25 m a output voltage v out 6.0 v output cur rent i out internally limited storage temperature range t stg - 6 5 150 o c operating ratings (note 3 ) (note 4) characteristic symbol min max unit supply voltage v in 3.0 5.5 v ambient temperature range t a - 40 +85 o c operating junction temperature ra nge t j - 40 125 o c thermal resistance junction - to - ambient sop8 (note 5) ja 125 o c/w msop8(note 6) 166 sot - 23 - 5l (note 7) 250 thermal resistance junction - to - c ase sop8 (note 5) j c 33 o c/w msop8(note 6) 44 sot - 23 - 5l (note 7) 130 note : 1. e xceeding the absolute maximum ratin gs may damage the device. 2. it is recommended for v en voltage not to exceed v in voltage. 3 . the device is not guaranteed to function outside its operating rating. 4. devices are esd sensitive. handling precautions are recommended. 5. test condition for sop8 : copper area = 150mm 2 , board size = 500 mm x 650mm, 1.6t 6. test condition for msop8 : copper area = 150mm 2 , board size = 500 mm x 650mm, 1.6t 7. test condition for sot - 23 - 5l : copper area = 35mm 2 , board siz e = 430 mm x 430mm, 1.6t
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 3 - htc ordering information package oder no. description marking compliance status sot23 - 5l tj2110lgsf5 1a, active low 2110lg rohs, green contact us sop8 tj2110lgd 1a, active low tj2110lg rohs, green contact us msop8 TJ2110LGMD 1a, active low tj2110lg rohs, green contact us sot23 - 5l tj2110hgsf5 1a, active high 2110hg rohs, green contact us sop8 tj2110hgd 1a, active high tj2110hg rohs, green contact us msop8 tj2110hgmd 1a, active high tj2110hg rohs, green contact us 2 1 1 0 t j p a c k a g e t y p e r o o t n a m e p r o d u c t c o d e : s o p 8 g r e e n m o d e g b l a n k : h a l o g e n f r e e : p b f r e e e n a b l e m o d e h l : a c t i v e C h i g h : a c t i v e C l o w s f 5 d m d : s o t 2 3 - 5 l : m s o p 8
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 4 - htc typical application circuit function block diagram e n f l g o u t g n d i n v c c 3 . 0 v t o 5 v u s b c o n t r o l u s b p o r t s t j 2 1 1 0 d + d - v b u s g n d 0 . 1 u f 3 3 u f 0 . 1 u f v c o n t 1 0 k c u r r e n t l i m i t f l a g l o g i c t h e r m a l s h u t d o w n u v l o b i a s g a t e c o n t r o l e n f l g o u t i n g n d
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 5 - htc pin configuration pin description pin name pin no. pin description & function sop - 8/msop - 8 sot23 - 5l gnd 1 2 ground in 2 , 3 5 supply input: output mosfet drain. also supplies ic s internal circuitry. connect to positive supply. en 4 4 e nable : logic - compatible enable input . ( h: active high, l: active low). d o not float. flg 5 3 fau lt flag: active - low, open - drain output. i ndicates over current, uvlo and thermal shutdown. out 6,7 1 switch output: output mosfet source. typically connect to switched side of load . nc 8 n/a no internal connection; recommend tie to out pins 4 1 3 2 5 s o t - 2 3 - 5 l s o p - 8 i n e n o u t f l g g n d m s o p - 8 1 2 3 4 8 7 6 5 i n e n g n d i n o u t o u t f l g n c i n e n g n d i n o u t o u t f l g n c 1 2 3 4 8 7 6 5
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 6 - htc e lectrical characteristics (under the conditions of v in =+5v and t a =25 ) parameter symbol conditions min typ max units operating voltage range v in 3.0 5.5 v supply current i cc enable off ,out=open 0.05 1 ua enable on, out=open 8 0 1 5 0 ua enable input threshold voltage v en ( note 8 ) 0.8 2.0 v enable input current i en v en = 0v to 5.5v - 1 0.01 1 ua enable input capacitance c en 1 pf switch resistance r ds(on) v in =5v, i out = 1.0 a 1 2 0 1 4 0 m? in =3.3v, i out = 1.0 a 1 4 0 1 6 0 m? don rl= 5 ? each output, cl=1uf r rl = 5 ? each output, cl=1uf doff rl= 5 ? each output, cl=1uf f rl= 5 ? each output, cl=1uf leak v enx 0.8v lim ramped load applie d to output 1. 7 2 .2 2. 7 a short circuit current limit i os each output, vout=0v 1. 2 1. 6 2.0 a over - temperature shutdown threshold t ts temperature increasing switch 145 o c temperature decreasing switch 135 o c error flag output resistance r fo v in =5 v, i l =10ma 10 25 ? in =3.3v, i l =10ma 15 40 ? foh v flag =5v 0.01 10 ua uvlo threshold uvlo v in = increasing 2. 1 2 . 25 2. 6 v v in = decreasing 1.9 2. 05 2. 4 5 v overcurrent flag response delay t dfov v in =5v, apply v out =0v until flg low 4 10 15 ms note: 8 . o ff is ven 0.8v and on is ven 2. 0 v for the tj2110 h . o ff is ven 2. 0 v and on is ven 0.8v for the tj2110 l .
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 7 - htc test circuit e n f l g o u t g n d i n v c c 3 . 0 v t o 5 v t j 2 1 1 0 r 2 c l c 1 0 . 1 u t o 1 u f r 1 v o u t 1 0 k
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 8 - htc typical performance characteristics on - resistance vs. temperature on - resistance vs. supply voltage on - current vs. temperature on - current vs. supply voltage enable threshold vs. temperature (tj2110l) enable threshold vs. supply voltage (tj2110l)
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 9 - htc typical performance characteristics (continued) dis able threshold vs. temperatur e (tj2110l) dis able threshold vs. supply voltage (tj2110l) turn - on delay time vs. temperature turn - o ff delay time vs. supply voltage ris ing time vs. temperature falling time vs. supply voltage
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 10 - htc typical performance characteristics (contin ued) current limit threshold vs. temperatur e current limit threshold vs. supply voltage short circuit current vs. supply voltage uvlo vs. temperature
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 11 - htc typical operating characteristics - v in = 5v, v en =0v, t a =25 o c, unless otherwise noted turn C on / turn - off (tj2110l) turn C on (tj2110l) turn C off (tj2110l) inrush current response (tj2110l) enable into short (tj2 110l ) ste pped short(tj2110l)
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 12 - htc typical operating characteristics ( continued) thermal shutdown uvlo C vin rising & falling
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 13 - htc function description supply filtering a 0.1uf to 1uf bypass capacitor from in pin to gnd pin is recommended to control power supply transients. without this bypass capacitor, an output short can cause ringing from supply lead inductance on the inpu t and damage the internal control circuitry. input or output transients must never exceed the absolute maximum supply voltage (v inmax = 6v) power dissipation the device s junction temperature depends on several factors such as the load, pcb layout, ambi ent temperature, and package type. equations that can be used to calculate power dissipation of each channel and junction temperature are found below: p d =r ds(on) x i out 2 total power dissipation of the device will be the summation of p d for both channels . to relate this to junction temperature, the following equation can be used: t j =p d x ja +t a where: t j = junction temperature t a = ambient temperature ja = thermal resistance of the package enable/shutdown the en control pin must be driven to a logic high or logic low for a clearly defined signal input. floating these control lines may cause unpredictable operation. fault flag the flg signal is open - drained output of n - channel mosfet, the flg output is pulled low to signal the following fault conditions: input under voltage, output current limit, and thermal shutdown. soft - start cond ition the tj2110 has high impedance when off, which gradually shifts to low impedance as the chip turns on. this prevents an inrush current from causing voltage drops that result from charging a capacitive load and can pull the usb voltage bus below specif ied levels. this satisfies the usb voltage droop requirements for bus - powered applications. the tj2110 can provide inrush current limiting for applications with large load capacitances where c l >10uf. current sense a sense mos fet monitors the current su pplied to the load. the sense mos fet measures current more efficiently than conventional resistance methods. when an overload or short circuit is encountered, the current - sense circuitry sends a control signal to the driver. the driver in turn reduces the gate - source voltage and drives the power mos fet into its saturation region, which switches the output into a constant - current mode and holds the current constant while varying the voltage on the load. over - current and short - circuit protection the tj2110 features an over - current protection circuitry to protect the device against overload conditions. the current limit threshold is preset internally. it protects the output mosfet switches from damage due to undesirable short circuit conditions of excess inr ush current often encountered during hot plug - in. the low limit of the current limit threshold of the tj2110 allows a minimum current of 1.0 a through the
single - channel power distribution switch tj2 110 jun . 201 2 C r1. 3 - 14 - htc mosfet switches. a current limit condition will signal the error flag. these features can protect the load system effectively at any accidental circumstances. thermal shutdown protection thermal shutdown limits the tj2110 junction temperature and protects the device from damage as a result of overheated. thermal protection turns o ff when the tj2110 s junction temperature 1 45 reached, allowing it to cool down until 1 3 5 . t he tj2110 is reactivated w hen a junction temperature drops to approximately 1 3 0 . it depends on the power dissipation, thermal resistance, and ambient temperature. under voltage l ockout under voltage lockout (uvlo) prevents the output mosfet from turning on until v in exceeds approximately 2. 3 v. after the switch turns on, if the voltage drops below 2. 1 v typically, uvlo shuts off the output mosfet. under voltage detection functions o nly when the switch is enabled. printed circuit layout the power circuitry of usb printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and emi. usb compliance the tj2110 is ideal for self - power ed and bus powered universal serial bus (usb) applications. a usb port provides a +5.0v bus and ground return line in addition to a twisted pair for data. the tj2110 will comply with the following usb requirements: 1) the fault current is well below the ul 25va safety requirements . 2) the flag outputs are available to indicate fault conditions to usb controllers . 3) the mosfet switches' low on - resistance meets usb voltage drop requirements . 4) the mosfet switch channel can supply 1.0 a as required by usb dow nstream devices . 5) soft start eliminates any momentary voltage drops on the upstream port that may occur when the switches are enabled in bus - powered applications. 6) an under - voltage lockout ensures that the device remains off unless there is a valid in put supply voltage present . 7) + 3.0 v and +5.0v logic compatible enable inputs . 8) thermal shutdown prevents the possibility of catastrophic switch failure from high - current loads . 8) the device is available in both active - high and active - low versions .

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