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1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 1 - htc msop8 / sop8 / sop8-pp pkg sot-223 3l pkg to252 3l / 5l pkg to-263 3l / 5l pkg to-220 3l / 5l pkg sot-89 5l pkg ordering information device package tj3965md-adj tj3965md-x.x msop8 tj3965d-adj tj3965d-x.x sop8 tj3965dp-adj tj3965dp-x.x sop8-pp 3965s-x.x sot-223 3l tj3965grs-adj tj3965grs-x.x to-252 3l/5l tj3965gr-adj tj3965gr-x.x to-263 3l/5l tj3965t-adj tj3965t-x.x to-220 3l/5l 3965f-adj 3965f-x.x sot-89 5l features z ultra low dropout voltage z low ground pin current z excellent line and load regulation z guaranteed output current of 1.5a z available in msop8, sop8, sop8-pp, sot-223, to-252, to-263, to-220, and sot-89 packages z fixed output voltages : 1.2v, 1.8v, 2.5v, 3.3v, and 5.0v z sense option improves load regulation z over-temperature/over-current protection z -40 to 125 junction temperature range z moisture sensitivity level 3 application z battery powered equipments z motherboards and graphic cards z microprocessor power supplies z peripheral cards z high efficiency linear regulators z battery chargers descripsion the tj3965 series of high performance ultra low-dropout linear regulators operates from 2.5v to 6v input supply and provides ultra low-dropout voltage, high output current with low ground current. wide range of preset output voltage options are available. these ultra low dropout linear regulators respond fast to step changes in load which makes them suitable for low voltage micro- processor applications. the tj3965 is developed on a cmos process technology which allows low quiescent current operation independent of output load current. this cmos process also allows the tj3965 to operate under extremely low dropout conditions. x.x = output voltage = 1.2, 1.8, 2.5, 3.3, and 5.0 absolute maximum ratings characteristic symbol min. max. unit input supply voltage (survival) v in -0.3 6.5 v enable input voltage (survival) v en (1) -0.3 6.5 v maximum output current i max - 1.5 a lead temperature (soldering, 5 sec) t sol 260 storage temperature range t stg -65 150 operating junction temperature range t jopr -40 125 (1) it is recommended for v en voltage not to exceed v in voltage.
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 2 - htc ordering information v out package order no. description supplied as status msop8 tj3965md-adj-8l 1.5a, adjustable, enable reel contact us sop8 tj3965d-adj-8l 1.5a, adjustable, enable reel active sop8-pp tj3965dp-adj-8l 1.5a, adjustable, enable reel active to-252 5l tj3965rs-adj-5l 1.5a, adjustable, enable reel obsolete to-252 5l tj3965grs-adj-5l 1.5a, adjustable, enable reel active to-263 5l tj3965r-adj-5l 1.5a, adjustable, enable reel obsolete to-263 5l tj3965gr-adj-5l 1.5a, adjustable, enable reel active to-220 5l tj3965t-adj-5l 1.5a, adjustable, enable tube active adj sot-89 5l tj3965f-adj-5l 1.5a, adjustable, enable reel active msop8 tj3965md-1.2v-8l 1.5a, enable, sense reel contact us sop8 tj3965d-1.2v-8l 1.5a, enable, sense reel active sop8-pp tj3965dp-1.2-8l 1.5a, enable, sense reel active sot-223 3l tj3965s-1.2v-3l 1.5a reel active to-252 3l tj3965rs-1.2v-3l 1.5a reel obsolete to-252 3l tj3965grs-1.2v-3l 1.5a reel active to-252 5l tj3965rs-1.2v-5l 1.5a, enable, sense reel obsolete to-252 5l tj3965grs-1.2v-5l 1.5a, enable, sense reel active to-263 3l tj3965r-1.2v-3l 1.5a reel obsolete to-263 3l tj3965gr-1.2v-3l 1.5a reel active to-263 5l tj3965r-1.2v-5l 1.5a, enable, sense reel obsolete to-263 5l tj3965gr-1.2v-5l 1.5a, enable, sense reel active to-220 3l tj3965t-1.2v-3l 1.5a tube active to-220 5l tj3965t-1.2v-5l 1.5a, enable, sense tube active 1.2v sot-89 5l tj3965f-1.2v-5l 1.5a, enable, sense reel active msop8 tj3965md-1.8v-8l 1.5a, enable, sense reel contact us sop8 tj3965d-1.8v-8l 1.5a, enable, sense reel active sop8-pp tj3965dp-1.8v-8l 1.5a, enable, sense reel active sot-223 3l tj3965s-1.8v-3l 1.5a reel active to -252 3l tj3965rs-1.8v-3l 1.5a reel obsolete to -252 3l tj3965grs-1.8v-3l 1.5a reel active to -252 5l tj3965rs-1.8v-5l 1.5a, enable, sense reel obsolete to -252 5l tj3965grs-1.8v-5l 1.5a, enable, sense reel active to -263 3l tj3965r-1.8v-3l 1.5a reel obsolete to -263 3l tj3965gr-1.8v-3l 1.5a reel active to -263 5l tj3965r-1.8v-5l 1.5a, enable, sense reel obsolete to -263 5l tj3965gr-1.8v-5l 1.5a, enable, sense reel active to-220 3l tj3965t-1.8v-3l 1.5a tube active to-220 5l tj3965t-1.8v-5l 1.5a, enable, sense tube active 1.8v sot-89 5l tj3965f-1.8v-5l 1.5a, enable, sense reel active
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 3 - htc ordering information (continued) v out package order no. description supplied as status msop8 tj3965md-2.5v-8l 1.5a, enable, sense reel contact us sop8 tj3965d-2.5v-8l 1.5a, enable, sense reel active sop8-pp tj3965dp-2.5v-8l 1.5a, enable, sense reel active sot-223 3l tj3965s-2.5v-3l 1.5a reel active to -252 3l tj3965rs-2.5v-3l 1.5a reel obsolete to -252 3l tj3965grs-2.5v-3l 1.5a reel active to -252 5l tj3965rs-2.5v-5l 1.5a, enable, sense reel obsolete to -252 5l tj3965grs-2.5v-5l 1.5a, enable, sense reel active to -263 3l tj3965r-2.5v-3l 1.5a reel obsolete to -263 3l tj3965gr-2.5v-3l 1.5a reel active to -263 5l tj3965r-2.5v-5l 1.5a, enable, sense reel obsolete to -263 5l tj3965gr-2.5v-5l 1.5a, enable, sense reel active to-220 3l tj3965t-2.5v-3l 1.5a tube active to-220 5l tj3965t-2.5v-5l 1.5a, enable, sense tube active 2.5v sot-89 5l tj3965f-2.5v-5l 1.5a, enable, sense reel active msop8 tj3965md-3.3v-8l 1.5a, enable, sense reel contact us sop8 tj3965d-3.3v-8l 1.5a, enable, sense reel active sop8-pp tj3965dp-3.3v-8l 1.5a, enable, sense reel active sot-223 3l tj3965s-3.3v-3l 1.5a reel active to -252 3l tj3965rs-3.3v-3l 1.5a reel obsolete to -252 3l tj3965grs-3.3v-3l 1.5a reel active to -252 5l tj3965rs-3.3v-5l 1.5a, enable, sense reel obsolete to -252 5l tj3965grs-3.3v-5l 1.5a, enable, sense reel active to -263 3l tj3965r-3.3v-3l 1.5a reel obsolete to -263 3l tj3965gr-3.3v-3l 1.5a reel active to -263 5l tj3965r-3.3v-5l 1.5a, enable, sense reel obsolete to -263 5l tj3965gr-3.3v-5l 1.5a, enable, sense reel active to-220 3l tj3965t-3.3v-3l 1.5a tube active to-220 5l tj3965t-3.3v-5l 1.5a, enable, sense tube active 3.3v sot-89 5l tj3965f-3.3v-5l 1.5a, enable, sense reel active msop8 tj3965md-5.0v-8l 1.5a, enable, sense reel contact us sop8 tj3965d-5.0v-8l 1.5a, enable, sense reel active sop8-pp tj3965dp-5.0v-8l 1.5a, enable, sense reel active sot-223 3l tj3965s-5.0v-3l 1.5a reel active to -252 3l tj3965rs-5.0v-3l 1.5a reel obsolete to -252 3l tj3965grs-5.0v-3l 1.5a reel active to -252 5l tj3965rs-5.0v-5l 1.5a, enable, sense reel obsolete to -252 5l tj3965grs-5.0v-5l 1.5a, enable, sense reel active to -263 3l tj3965r-5.0v-3l 1.5a reel obsolete to -263 3l tj3965gr-5.0v-3l 1.5a reel active to -263 5l tj3965r-5.0v-5l 1.5a, enable, sense reel obsolete to -263 5l tj3965gr-5.0v-5l 1.5a, enable, sense reel active to-220 3l tj3965t-5.0v-3l 1.5a tube active to-220 5l tj3965t-5.0v-5l 1.5a, enable, sense tube active 5.0v sot-89 5l tj3965f-5.0v-5l 1.5a, enable, sense reel active
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 4 - htc (continued) package type root name product code tj 3965 output voltage : adj / 1.2v / 1.8v / 2.5v / 3.3v / 5.0v lead count : 3l(fixed output only) / 5l / 8l md d dp s rs r t f : msop8 : sop8 : sop8-pp : sot223 : to252 : to263 : to220 : sot89 root name g blank : halogen free : pb free
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 5 - htc pin configuration msop8 / sop8 sop8-pp( exposed pad) sot223-3l to252-3l to252-5l to263-3l to263-5l to220-3l to220-5l sot89-5l pin description sot223 / to252 / to263 / to220 3lead sot-223 5lead sot-89 5lead pin no. name function name function name function 1 v in input supply en chip enable sense/adj remote sense or output adjust 2 gnd ground v in input supply gnd ground 3 v out output voltage v out output voltage en chip enable 4 - - sense/adj remote sense or output adjust v in input supply 5 - - gnd ground v out output voltage to252 / to263 / to220 5lead msop8 / sop8 / sop8-pp 8lead pin no. name function name function 1 en chip enable en chip enable 2 v in input supply v in input supply 3 gnd ground v out output voltage 4 v out output voltage sense/adj remote sense or output adjust 5 / 6/ 7 / 8 sense/adj remote sense or output adjust gnd ground - - - exposed thermal pad connect to ground. (sop8-pp only) 4 3 2 5 1 vin v out en gnd sense/adj en 1 vin 2 vout 3 sense/adj 4 8 gnd 7 gnd 6 gnd 5 gnd exposed pad
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 6 - htc typical application typical 3 pin application typical 5 / 8 pin application 5 / 8 pin remote load sense application typical adjustable version application * tj3965 can deliver a continuous current of 1.5a over the full operating temperature. however, the output current is limited by the restriction of power dissipat ion which differs from packages. a heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. with respect to the applied package, the maximum output current of 1.5a may be still undeliverable. * when a pull-up resistor is connected between v en terminal and v en signal (or v in line), the resistance of the pull-up resistor should be kept under 10k ? . * see application information vin vout tj3965 en sense gnd v in v out c in 68 f c out 33 + - l o a d vin vout tj3965 en adj gnd v in v out c in 68 f c out 33 + - r 1 r 2 vin vout tj3965 en sense gnd v in v out c in 68 f c out 33 + - vin vout tj3965 gnd v in v out c in 68 f c out 33 + - + - + - + - + -
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 7 - htc electrical characteristics (note 1) limits in standard typeface are for tj=25 , and limits in boldface type apply over the full operating temperature range . unless otherwise specified: v in (note 2) = v o(nom) + 1 v, i l = 10 ma, c in = 68 uf, c out = 33 uf, v en = v in - 0.3 v parameter symbol test condit ion min. typ. max. unit output voltage tolerance v o 10 ma < i l < 1.5 a v out +1 v < v in < 6 v -2 -3 0 2 3 % adjustable pin voltage (adj version) v adj 10 ma < i l < 1.5 a v out +1.5 v < v in < 6 v 1.117 1.110 1.145 1.174 1.188 v line regulation (note 3) v line v out +1 v < v in < 6 v - 0.08 0.18 0.20 %/v load regulation (note 3, 4) v load 10 ma < i l < 1.5 a - 0.25 0.55 1.00 % i l = 150 ma - 40 55 65 dropout voltage (note 5) v drop i l = 1.5 a - 380 450 550 mv i l = 150 ma - 30 55 75 ground pin current (note 6) i gnd1 i l = 1.5 a - 30 55 75 ua ground pin current (note 7) i gnd2 v en < 0.2 v - 30 55 75 ua output peak current i peak 2.0 1.7 2.2 - a thermal shutdown temperature t sd - 165 - thermal shutdown hysteresis t sd - 10 - logic low v il output = low - 0 0.5 2 v in ? v enable threshold logic high v ih output = high 0.5 2 v in + v in - v enable input current i en v en = v in - 0.05 2 ua note 1. stresses listed as the absolute maximum ratings may c ause permanent damage to the device. these are for stress ratings. functional operating of the device at these or any other conditions beyond th ose indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rati ng conditions for extended periods may rema in possibly to affect device reliability. note 2. the minimum operating value for input voltage is equal to either (v out,nom + v drop ) or 2.5v, whichever is greater. note 3. output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the i nput line voltage. output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. note 4. regulation is measured at const ant junction temperature by using a 20ms curr ent pulse. devices are tested for load regu lation in the load range from 10ma to 1.5a note 5. dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the n ominal value. dropout voltage specification applies only to output voltages of 2.5v and above. for output voltages below 2.5v, the dropout vo ltage is nothing but the input to output differential, since the minimum input voltage is 2.5v note 6. ground current, or quiescent current, is the di fference between input and output currents. it's defined by i gnd1 = i in - i out under the given loading condition. the total current dr awn from the supply is the sum of the load current plus the ground pin current. note 7. ground current, or standby current, is the input current drawn by a regulator when the output voltage is disabled by an enable signal.
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 8 - htc typical operating characteristics ambient temperature vs. output voltage change output current vs. dropout voltage power dissipation vs. case temperature, msop8 power dissipation vs. case temperature, sop8 power dissipation vs. case temperature, sop8-pp power dissipation vs. case temperature, to220 t. b . d .
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 9 - htc application information output adjustment (adjustable version) an adjustable output device has output voltage range of 1.145v to 5.0v. to obtain a desired output voltage, the following equation can be used with r1 resistor. the sum of r1 and r2 should be in range of 1k ? to 100k ? ? ? ? ? ? ? ? = 1 145 . 1 1 2 out v r r to enhance output stability, a capacitor of 68pf to 100pf can be placed in series with v out and adj. en pin a cmos logic level signal at the en pin will turn-on/off the regulator. if this pin is not used for logic control, it must be tied to vin for proper operation. when a pull-up resistor is connected between en pin and v en signal(or v in line), the resistance should be kept under 10k ? . sense pin in applications where the regulator output is not very close to the load, the tj3965 can provide better remote load regulation characteristics using the sense pin. tj3965 regulates the voltage at the output pin. hence, the voltage at the remote load will be lower than the voltage at the output pin as a value of the voltage drop across the trace series resistance. if the sense option pin is not required, the sense pin must be connected to the v out pin. connecting the sense pin to the remote load will provide regulation at the remote load because the tj 3965 regulates the voltage at the sense pin when the sense option pin is used. output capacitor the tj3965 requires a proper output capacitance to maintain stability and improve transient response over current. the esr of the output capacitor within the limits of 0.5 ? to 10 ? is required. a minimum capacitance value of 22f of tantalum or aluminum el ectrolytic capacitor is recommended. in a case of ceramic capacitor, a minimum capacitance value of 10f is required and additional resistance of minimum 1 ? should be added with the output capacitor in series to maintain its minimum esr. the resistance and capacitance have to be varied upon the load current.
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 10 - htc vout adj gnd r2 r1 22f output + - vout adj gnd r2 r1 10f output additional resistance maximum output current capability the tj3965 can deliver a continuous current of 1.5a over the full operating junction temperature range. however, the output current is limited by the restriction of power dissipat ion which differs from packages. a heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. with respect to the ap plied package, the maximum output current of 1.5a may be still undeliverable due to the restriction of the power dissipation of tj3965. under all possible conditions, the junction temperature must be within the range specified under operating conditions. the temperatures over the device are given by: t c = t a + p d x ca / t j = t c + p d x jc / t j = t a + p d x ja where t j is the junction temperature, t c is the case temperature, t a is the ambient temperature, p d is the total power dissipation of the device, ca is the thermal resistan ce of case-to-ambient, jc is the thermal resistance of junction-to-case, and ja is the thermal resistance of junction to ambient. the total power dissipation of the device is given by: p d = p in ? p out = (v in x i in )?(v out x i out ) = (v in x (i out +i gnd )) ? (v out x i out ) = (v in - v out ) x i out + v in x i gnd where i gnd is the operating ground current of the device which is specified at the electrical characteristics. the maximum allowable temperature rise (t rmax ) depends on the maximum ambient temperature (t amax ) of the application, and the maximum allowable junction temperature (t jmax ): t rmax = t jmax ? t amax the maximum allowable value for junction-to-ambient thermal resistance, ja , can be calculated using the formula: ja = t rmax / p d = (t jmax ? t amax ) / p d tj3965 is available in sot223, msop8, sop8-pp, to263, to220, and sot89 packages. the thermal resistance depends on amount of copper area or heat sink, and on air flow. if the maximum allowable value of ja calculated above is over 140c/w for sot223 package, over 220c/w for msop8 package, over 165c/w for sop8 package, over 175c/w for sop8-pp package, over 105 c/w for to252 package, over 80 c/w for to263 package, over 70 c/w for to220 package, no heat sink is needed since the package can dissipate enough heat to sati sfy these requirements. if the value for allowable ja falls near or below these limits, a heat sink or proper area of copper plane is required. in summary, the absolute maximum ratings of thermal resistances are as follow: absolute maximum ratings of thermal resistance no heat sink / no air flow / no adjacent heat source / t a = 25
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 11 - htc characteristic symbol rating unit thermal resistance junction-to-ambient / msop8 ja-msop8 220 c/w thermal resistance junction-to-ambient / sop8 ja-sop8 165 c/w thermal resistance junction-to-ambient / sop8-pp ja-sop8-pp 175 c/w thermal resistance junction-to-ambient / sot223 ja-sot223 140 c/w thermal resistance junction-to-ambient / to252 ja-to252 105 c/w thermal resistance junction-to-ambient / to263 ja-to263 80 c/w thermal resistance junction-to-ambient / to220 ja-to220 70 c/w thermal resistance junction-to-ambient / sot89 ja-sot89 200 c/w in case that there is no cooling solution and no heat sink / copper plane area for heat sink, the maximum allowable power dissipation of each package is as follow; characteristic symbol rating unit maximum allowable power dissipation at t a =25c / msop8 p dmax-msop8 0.455 w maximum allowable power dissipation at t a =25c / sop8 p dmax -sop8 0.606 w maximum allowable power dissipation at t a =25c / sop8-pp p dmax -sop8-pp 0.571 w maximum allowable power dissipation at t a =25c / sot223 p dmax -sot223 0.714 w maximum allowable power dissipation at t a =25c / to252 p dmax -to252 0.952 w maximum allowable power dissipation at t a =25c / to263 p dmax -to263 1.250 w maximum allowable power dissipation at t a =25c / to220 p dmax -to220 1.429 w maximum allowable power dissipation at t a =25c / sot89 p dmax ?sot89 0.500 w - please note that above maximum allowable power dissipation is based on the minimum copper plane area which does not exceed the proper foot print of the package. and the ambient temperature is 25c. if proper cooling solution such as heat sink, copper plane area, air flow is applied, the maximum allowable power dissipation could be increased. howeve r, if the ambient temperature is increased, the allowable power dissipation would be decreased. for example, in case of sot223 and to263 package, ja-sot223 is 140 c/w and ja-to263 is 80 c/w, however, as shown in below graph, ja could be decreased with respect to the copper plane area. so, the specification of maximum power dissipation for an application is fixed, the proper copper plane area could be estimated by following graphs. as shown in graph, wider copper plane area leads lower ja .
1.5a ultra low dropout linear regulator tj3965 jul. 2010 ? rev. 1.12 - 12 - htc the maximum allowable power dissipation is also in fluenced by the ambient te mperature. with the above ja -copper plane area relationship, the maximum allowable power dissipation could be evaluated with respect to the ambient temperature. as s hown in graph, the higher copper plane area leads ja . and the higher ambient temperature leads lo wer maximum allowable power dissipation. all this relationship is based on the aforesaid equation ; ja = t rmax / p d = (t jmax ? t amax ) / p d t. b . d

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