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2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 1/14 htc sop8 / sop8-pp sot-223 3l to252 3l / 5l pkg to-263 3l / 5l pkg ordering information device package TJ4220gd-adj TJ4220gd-x.x sop8 TJ4220gdp-adj TJ4220gdp-x.x sop8-pp TJ4220xs-adj TJ4220xs-x.x sot-223 3l/5l TJ4220grs-adj TJ4220grs-x.x to-252 3l/5l TJ4220gr-adj TJ4220gr-x.x to-263 3l/5l features ? ultra low dropout voltage ? compatible with low esr ml cc as input/output capacitor ? good line and load regulation ? guaranteed output current of 2a ? available in sop8, sop8-pp, sot-223 and to-252 and to-263 packages ? fixed output voltages : 1.0v, 1.2v, 1.8v, 2.5v, and 3.3v ? sense option improves load regulation ? over-temperature/over-current protection ? -40 oc to 125 oc junction temperature range application ? lcd tvs and settop boxes ? battery powered equipments ? motherboards and graphic cards ? microprocessor power supplies ? peripheral cards ? high efficiency linear regulators ? battery chargers description the TJ4220 series of high performance ultra-low dropout linear regulators operates from 2.5v to 6v input supply and provides ultra-low dropout volt age, 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 TJ4220 is developed on a cmos process technology which allows low quiescent current operation independent of output load current. this cmos process also allows the TJ4220 to operate under extremely low dropout conditions. x.x = output voltage = 1.0, 1.2, 1.8, 2.5, and 3.3 absolute maximum ratings characteristic symbol min. max. unit input supply voltage (survival) v in - 6.5 v enable input voltage (survival) v en - 6.5 v maximum output current i max - 2 a lead temperature (soldering, 5 sec) t sol 260 oc storage temperature range t stg -65 150 oc operating junction temperature range t jopr -40 125 oc package thermal resistance * ja-sop8-pp 68 oc/w * calculated from package in still air, mounted to 2.6mm x 3.5mm(mi nimum foot print) 2 layer pcb without thermal vias per jesd5 1 standards.
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 2/14 htc ordering information v out package order no. description package marking status sop8 TJ4220gd-adj 2a, adjustable, enable TJ4220g-adj contact us sop8-pp TJ4220gdp-adj 2a, adjustable, enable TJ4220g-adj active to-252 5l TJ4220grs-adj-5l 2a, adjustable, enable TJ4220g-adj contact us adj to-263 5l TJ4220gr-adj-5l 2a, adjustable, enable TJ4220g-adj contact us sop8 TJ4220gd-1.0 2a, enable, sense TJ4220g-1.0 contact us sop8-pp TJ4220gdp-1.0 2a, enable, sense TJ4220g-1.0 contact us sot-223 3l TJ4220s-1.0 2a 4220-1.0 contact us to-252 3l TJ4220grs-1.0-3l 2a TJ4220g-1.0 contact us to-252 5l TJ4220grs-1.0-5l 2a, enable, sense TJ4220g-1.0 contact us to-263 3l TJ4220gr-1.0-3l 2a TJ4220g-1.0 contact us 1.0v to-263 5l TJ4220gr-1.0-5l 2a ,enable, sense TJ4220g-1.0 contact us sop8 TJ4220gd-1.2 2a, enable, sense TJ4220g-1.2 contact us sop8-pp TJ4220gdp-1.2 2a, enable, sense TJ4220g-1.2 contact us sot-223 3l TJ4220s-1.2 2a 4220-1.2 contact us to-252 3l TJ4220grs-1.2-3l 2a TJ4220g-1.2 contact us to-252 5l TJ4220grs-1.2-5l 2a, enable, sense TJ4220g-1.2 contact us to-263 3l TJ4220gr-1.2-3l 2a TJ4220g-1.2 contact us 1.2v to-263 5l TJ4220gr-1.2-5l 2a ,enable, sense TJ4220g-1.2 contact us sop8 TJ4220gd-1.8 2a, enable, sense TJ4220g-1.8 contact us sop8-pp TJ4220gdp-1.8 2a, enable, sense TJ4220g-1.8 contact us sot-223 3l TJ4220s-1.8 2a 4220-1.8 contact us to-252 3l TJ4220grs-1.8-3l 2a TJ4220g-1.8 contact us to-252 5l TJ4220grs-1.8-5l 2a, enable, sense TJ4220g-1.8 contact us to-263 3l TJ4220gr-1.8-3l 2a TJ4220g-1.8 contact us 1.8v to-263 5l TJ4220gr-1.8-5l 2a ,enable, sense TJ4220g-1.8 contact us sop8 TJ4220gd-2.5 2a, enable, sense TJ4220g-2.5 contact us sop8-pp TJ4220gdp-2.5 2a, enable, sense TJ4220g-2.5 contact us sot-223 3l TJ4220s-2.5 2a 4220-2.5 contact us to-252 3l TJ4220grs-2.5-3l 2a TJ4220g-2.5 contact us to-252 5l TJ4220grs-2.5-5l 2a, enable, sense TJ4220g-2.5 contact us to-263 3l TJ4220gr-2.5-3l 2a TJ4220g-2.5 contact us 2.5v to-263 5l TJ4220gr-2.5-5l 2a ,enable, sense TJ4220g-2.5 contact us sop8 TJ4220gd-3.3 2a, enable, sense TJ4220g-3.3 contact us sop8-pp TJ4220gdp-3.3 2a, enable, sense TJ4220g-3.3 contact us sot-223 3l TJ4220s-3.3 2a 4220-3.3 contact us to-252 3l TJ4220grs-3.3-3l 2a TJ4220g-3.3 contact us to-252 5l TJ4220grs-3.3-5l 2a, enable, sense TJ4220g-3.3 contact us to-263 3l TJ4220gr-3.3-3l 2a TJ4220g-3.3 contact us 3.3v to-263 5l TJ4220gr-3.3-5l 2a ,enable, sense TJ4220g-3.3 contact us
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 3/14 htc pin configuration n.c en vin n.c gnd adj / sense vout n.c 1 2 3 4 8 7 6 5 exposed pad n.c en vin n.c gnd adj / sense vout n.c 1 2 3 4 8 7 6 5 sop8 sop8-pp sot223-3l to252-3l to252-5l to263-3l to263-5l pin description sot223/to252/to263 3 lead to252 / to263 5 lead sop8/sop8-pp pin no. name function name function name function 1 v in input supply en chip enable - n.c. 2 gnd ground v in input supply en chip enable 3 v out output voltage gnd ground v in input supply 4 - - v out output voltage - n.c. 5 - - sense/adj remote sense or output adjust - n.c. 6 - - - - v out output voltage 7 - - - - sense/adj remote sense or output adjust 8 - - - - gnd ground * exposed pad of sop8-pp package should be externally connected to gnd. lead count : 3l / 5l (applied for to252 & to263 only) output voltage : adj / 1.0 / 1.2 / 1.8 / 2.5 / 3.3 package type d dp s rs r : sop8 : sop8-pp : sot223 : to252 : to263 root name product code t j 4 2 2 0 g rs ? a d j ? 5 l material class g blank : halogen free : pb free
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 4/14 htc basic application typical 3 pin application c out 10uf c in 10uf v in v out TJ4220 gnd vin vout typical 5 / 8 pin application c out 10uf c in 10uf en v in v out sense TJ4220 gnd vin vout en 5 / 8 pin remote load sense application c in 10uf en v in v out sense TJ4220 gnd vin en c out 10uf l o a d vout typical adjustable version application c out 10uf c in 10uf en v in v out adj TJ4220 gnd vin vout en r2 r1 c ff * TJ4220 can deliver a continuous current of 2a over the full operating temperat ure. however, the output current is limited by the restriction of power dissipation which diff ers from packages. a heat sink may be required depending on the maximum power dissipation and maximum ambient temper ature of application. with respect to the applied package, the maximum output current of 2a may be still undeliverable. * see application information.
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 5/14 htc electrical characteristics (note 1) limits in standard typeface are for tj=25oc, 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 = 10 uf, c out = 10 uf, v en = v in - 0.3 v parameter symbol test condit ion min. typ. max. unit output voltage tolerance v o v out +1 v < v in < 5.5 v -2 -3 0 2 3 % adjustable pin voltage (adj version) v adj 2.5 v < v in < 5.5 v 0.784 0.776 0.8 0.816 0.824 v line regulation (note 3) v line v out +1 v < v in < 5.5 v - 0.15 - 0.40 %/v load regulation (note 3, 4) v load 10 ma < i l < 2 a - 0.20 0.50 0.60 % i l = 200 ma - 45 55 65 dropout voltage (note 5) v drop i l = 2 a - 400 500 600 mv i l = 200 ma - 0.40 0.6 1.0 ground pin current (note 6) i gnd i l = 2 a - 0.40 0.6 1.0 ma ground pin current (note 7) i gnd_off v en < 0.2 v - 0.5 1 2 ua f = 1khz - 55 - power supply rejection ratio psrr f = 1khz, c ff = 1uf - 65 - db current limit i limit - - 5 - a thermal shutdown temperature t sd - - 165 - oc logic low v il output = low - - 0.4 v enable threshold logic high v ih output = high 2.0 - - v enable input current i en v en = v in - 0.1 - 1 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 10ms curr ent pulse. devices are tested for load regu lation in the load range from 10ma to 2a. 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.
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 6/14 htc application information introduction TJ4220 is intended for applications where high current capability and very low dropout voltage are required. it provides a simple, low cost solution that occupies very little pcb estate. additional features include an enable pin to allow for a very low power consumption standby mode, an adjustable pin to provide a fully adjustable output voltage, and sense pin to provide bette r remote load regulation characteristics. component selection input capacitor : a large bulk capacitance over than 10uf/a(output load) should be closely placed to the input supply pin of the TJ4220 to ensure that the input supply voltage does not sag. also a minimum of 10uf ceramic capacitor is recommended to be placed directly next to the v in pin. it allows for the device being some distance from any bulk capacitor on the rail. additionally, input droop due to lo ad transients is reduced, improving load transient response. additional capacitance may be added if required by the application.(see fig.1) output capacitor : a minimum ceramic capacitor over than 10uf/a(output load) should be very closely placed to the output voltage pin of the TJ4220. increasing capacitance will improve the overall transient response and stability. decoupling (bypass) capacitor : in very electrically noisy environments, it is reco mmended that additional ceramic capacitors be placed from vin to gnd. the use of multiple lower value ceramic capaci tors in parallel with output capacitor also allows to achieve better transient performance and stabilit y if required by the application.(see fig.1) feed-forward capacitor to get the higher psrr than the inher ent performance of TJ4220, it is recommended that additional ceramic feed-forward capacitor be placed from vout pin to adj pi n. the capacitance of feed-forward capacitor with range of 10pf to 1uf allows to achieve better psrr performance when required by the application.(see fig.2) fig. 1. application with decoupling capacitor, fig. 2. application with feed-forward capacitor, cc1 & cc2 cff delayed start-up when power sequence control is required or rising time of input supply voltage is over than 100usec, it is recommended to apply delayed start-up by using cdelay as shown in fig. 3. it can adjust proper delay by rp-cdelay time constant. and also it can prevent any unexpected transient characteristics at output voltage when the rising time of input supply voltage is as long as 100usec or longer. fig. 3. application with delayed start-up
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 7/14 htc output adjustment (adjustable version) an adjustable output device has output voltage range of 0.8v to 5.0v. the operating condition of v in and the operating characteristics of v out depend on the dropout voltage performance in accordance with output load current presented at fig. 7. to obtain a desired output voltage, the following equation can be used with r1 resistor range of 100 ? to 50k ? . c out 10uf c in 10uf en v in v out adj TJ4220 gnd vin vout en r2 r1 c ff ? ? ? ? ? ? ? ? 1 8 0 1 2 . v r r out fig. 4. application for adjustable output voltage to enhance output stability, a feed-forward capacitor of 10nf to 1uf can be placed in series with v out and adj.(refer to "component selection" section) sense pin in applications where the regulator output is not very close to the load, the TJ4220 can provide better remote load regulation characteristics using the sense pin. TJ4220 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 4220 regulates the voltage at the sense pin when the sense option pin is used. fig. 5. conventional linear regulator applicatio n fig.6. remote load sense application maximum output current capability the TJ4220 can deliver a continuous current of 2a over the full operating ju nction 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 applied package, the maximum output current of 2a may be still undeliverable due to the rest riction of the power dissipation of TJ4220. 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
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 8/14 htc 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 resistance 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 TJ4220 is available in sot223, sop8-pp, to252 and to263 packages. the thermal resistance depends on amount of copper area or heat sink, and on air flow. if proper cooling solution such as heat sink, copper plane area, or air flow is applied, the maximum allowable power dissipation could be increased. howe ver, if the ambient temperature is increased, the allowable power dissipation would be decreased. the graph above is valid for the thermal impedance sp ecified in the absolute maximum ratings section on page 1.
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 9/14 htc the 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 plane area could be estimated by following graphs. wider copper plane area leads lower ja . the maximum allowable power dissipation is also in fluenced by the ambient temperature. with the ja - copper plane area relationship, the maximum allo wable power dissipation could be evaluated with respect to the ambient temperature. as show n in graph, the higher copper plane area leads ja . and the higher ambient temperature leads lower maximum allowable power dissipation.
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 10/14 htc typical operating characteristics test circuit vin en vout adj gnd r2 r1 vin vout 10uf 10uf cff 10k case 1 ( vin = 3.3v, vout = 2.5v ) vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div start up @ iout=0a (cff=10nf, r2=51k ? , r1=24k ? ) start up @ iout=2a (cff=10nf, r2=51k ? , r1=24k ? ) vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div start up @ iout=0a (cff=10nf, r2=120k ? , r1=56k ? ) start up @ iout=2a (cff=10nf, r2=120k ? , r1=56k ? )
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 11/14 htc vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div start up @ iout=0a (cff=1uf, r2=51k ? , r1=24k ? ) start up @ iout=2a (cff=1uf, r2=51k ? , r1=24k ? ) vin : 1.0v/div, vout : 1.0v/div, time : 50ms/div vin : 2.0v /div, ven : 2.0v/div, vout : 2.0v/div, time : 5ms/div start up @ iout=1a (cff is varied, r2=51k ? , r1=24k ? ) start up with cdelay @ iout=10ma (cdelay is varied, cff=10nf, r2=51k ? , r1=24k ? ) iout : 1.0a/div, vout : 20mv/div, time : 500ms/div iout : 1.0a/div, vout : 20mv/div, time : 500ms/div load transient response (cff=10nf, r2=51k ? , r1=24k ? ) load transient response (cff=10nf, r2=51k ? , r1=24k ? )
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 12/14 htc vin : 1.0v/div, ven : 2.0v, vout : 2.0v/div, time : 500us/div vin : 1.0v/div, ven : 2.0v, vout : 2.0v/div, time : 500us/d iv start up by external ven @ iout=0a (cff=10nf, r2=51k ? , r1=24k ? ) start up by external ven @ iout=2a (cff=10nf, r2=51k ? , r1=24k ? ) case 2 ( vin = 2.5v, vout = 1.8v ) vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div start up @ iout=0a (cff=10nf, r2=30k ? , r1=24k ? ) start up @ iout=2a (cff=10nf, r2=30k ? , r1=24k ? ) vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div start up @ iout=0a (cff=10nf, r2=70k ? , r1=56k ? ) start up @ iout=2a (cff=10nf, r2=70k ? , r1=56k ? )
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 13/14 htc vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div start up @ iout=0a (cff=1uf, r2=30k ? , r1=24k ? ) start up @ iout=2a (cff=1uf, r2=30k ? , r1=24k ? ) vin : 1.0v/div, vout : 1.0v/div, time : 20ms/div vin : 1.0v /div, ven : 1.0v/div, vout : 1.0v/div, time : 5ms/div start up @ iout=1a (cff is varied, r2=30k ? , r1=24k ? ) start up with cdelay @ iout=10ma (cdelay is varied, cff=10nf, r2=30k ? , r1=24k ? ) iout : 1.0a/div, vout : 20mv/div, time : 500ms/div iout : 1.0a/div, vout : 20mv/div, time : 500ms/div load transient response (cff=10nf, r2=30k ? , r1=24k ? ) load transient response (cff=10nf, r2=30k ? , r1=24k ? )
2a ultra low dropout linear regulator TJ4220 jun. 2011 ? r1.0.6 14/14 htc vin : 1.0v/div, ven : 1.0v, vout : 1.0v/div, time : 500us/div vin : 1.0v/div, ven : 1.0v, vout : 1.0v/div, time : 500us/d iv start up by external ven @ iout=0a (cff=10nf, r2=30k ? , r1=24k ? ) start up by external ven @ iout=2a (cff=10nf, r2=30k ? , r1=24k ? ) dropout voltage @ vout=2.5v

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