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automotive power data sheet rev. 1.2, 2015-01-15 tls205b0 linear voltage post regulator low dropout, low noise, 3.3 v, adjustable, 500 ma tls205b0ejv tls205b0ejv33 tls205b0ldv tls205b0ldv33
type package marking tls205b0ejv pg-dso-8 exposed pad 205b0v tls205b0ejv33 pg-dso-8 exposed pad 205b0v33 tls205b0ldv pg-tson-10 205b0v tls205b0ldv33 pg-tson-10 205b0v3 pg-dso-8 exposed pad pg-tson-10 data sheet 2 rev. 1.2, 2015-01-15 linear voltage post regulator low dropout, low noise, 3.3 v, adjustable, 500 ma tls205b0 1overview features ? low noise down to 24 v rms (bw = 10 hz to 100 khz) ? 500 ma current capability ? low quiescent current: 30 a ? wide input voltage range up to 20 v ? internal circuitry working down to 2.3 v ? 2.5% output voltage accuracy (over full temperature and load range) ? low dropout voltage: 320 mv ? very low shutdown current: < 1 a ? no protection diodes needed ? fixed output voltage: 3.3 v ? adjustable version with output from 1.22 v to 20 v ? stable with 3.3 f output capacitor ? stable with aluminium, tantalum or ceramic output capacitors ? reverse polarity protection ? no reverse current ? overcurrent and overtemperature protected ? pg-dso-8 exposed pad and pg-tson-10 exposed pad package ? suitable for use in automotive electronics as post regulator ? green product (rohs compliant) ? aec qualified the tls205b0 is a micropower, low noise, low dropout vo ltage regulator. the device is capable of supplying an output current of 500 ma with a dropout voltage of 320 mv. designed for use in battery-powered systems, the low quiescent current of 30 a makes it an ideal choice. a key feature of the tls205b0 is its low output noise. by adding an external 10 nf bypass capacitor output noise values down to 24 v rms over a 10 hz to 100 khz bandwidth can be reached. the tls205b0 voltage regulator
tls205b0 overview data sheet 3 rev. 1.2, 2015-01-15 is stable with output capacitors as small as 3.3 f. small ceramic capacitors can be used without the series resistance required by many other linear voltage regulators. internal protection circuitry includes reverse battery protec tion, current limiting and reverse current protection. the tls205b0 comes as fixed output voltage variant 3.3 v as well as adjustable device with a 1.22 v reference voltage. it is available in a pg-dso-8 exposed pad an d as well as in a pg-tson-10 exposed pad package.
data sheet 4 rev. 1.2, 2015-01-15 tls205b0 block diagram 2 block diagram note: pin numbers in block diagrams refer to the pg-dso-8 exposed pad package type. figure 1 block diagram tls205b0 v33 fixed voltage version figure 2 block diagram tls205b0 v adjustable version bias voltage reference saturation control temperature protection over current protection tls205b0 i en gnd byp q sense error amplifier 1 2 4 5 8 6 bias voltage reference saturation control temperature protection over current protection tls205b0 (adj) i en gnd byp q adj error amplifier 1 2 4 5 8 6
tls205b0 pin configuration data sheet 5 rev. 1.2, 2015-01-15 3 pin configuration 3.1 pin assignment figure 3 pin configuration of tls205b0 in pg-dso-8 exposed pad for fixed voltage and adjustable version figure 4 pin configuration of tls20 5b0 in pg-tson-10 for fixed voltage and adjustable version i nc gnd q adj nc byp en 1 3 2 8 7 6 45 i nc gnd q sense nc byp en 1 3 2 8 7 6 45 tls205b0ejv33 tls205b0ejv 9 9 1 2 3 4 5 10 9 8 7 6 q q nc sense byp i i nc en gnd 1 2 3 4 5 10 9 8 7 6 q q nc adj byp i i nc en gnd tls205b0ldv33 tls205b0ldv
data sheet 6 rev. 1.2, 2015-01-15 tls205b0 pin configuration 3.2 pin definitions and functions pin symbol function 1 (dso-8 ep) 1,2 (tson-10) q output. supplies power to the load. for this pin a minimum output capacitor of 3.3 f is required to preven t oscillations. larger ou tput capacitors may be required for applications wit h large transient loads in order to limit peak voltage transients or when the regulator is appli ed in conjunction with a bypass capacitor. for more details please refer to ?application information? on page 24 . 2 (dso-8 ep) 4 (tson-10) sense (fix voltage version) output sense. for the fixed voltage version the sense pin is the input to the error amplifier. this allows to achieve an optimized regulation performance in case of small voltage drops r p that occur between regulator and load. in applications where such drops are relevant they can be eliminated by connecting the sense pin directly at the load. in standard configuration the sense pin can be directly connected to q. for furthe r details please refer to the section ?kelvin sense connection? on page 25 . 2 (dso-8 ep) 4 (tson-10) adj (adjustable version) adjust. for the adjustable version the adj pin is the input to the error amplifier. the adj pin voltage is 1.22 v referenced to ground and allows a output voltage range from 1.22 v to 20 v- v dr . the adj pin is internally clamped to 7 v. please note that the bias current of the adj pin is flowing into the pin. its typical value of 60 na shows a good stability with temperatur e. for furthe r details please refer to typical performance graph ?adjust pin bias current versus junction temperature t j ? on page 20 . 3, 7 (dso-8 ep) 3, 8 (tson-10) nc no connect. the nc pins have no connection to any internal circuitry. connect either to gnd or leave open. 4 (dso-8 ep) 5 (tson-10) byp bypass. the byp pin is used to bypass t he reference of t he tls205b0 to achieve low noise performanc e. the byp-pin is clamped in ternally to 0.6 v (i.e. one v be ). a small capacitor fr om the output q to th e byp pin will bypass the reference to lower the output voltage noise 1) . if not used this pin must be left unconnected. 5 (dso-8 ep) 7 (tson-10) en enable. with the en pin the tls205b0 can be put into a low power shutdown state. the output will be off wh en the en is pulled low. the en pin can be driven either by 3.3 v or 5 v logic or as well by open-collector logic with pull-up resistor. the pull-up resistor is required to suppl y the pull-up current of the open-collector gate 2) and the en pin current 3) . please note that if the en pin is not used it must be connected to v i . it must not be left floating. 6 (dso-8 ep) 6 (tson-10) gnd ground. for the adj version connect the bott om of the output voltage setting resistor divider directly to the gnd pin for optimum load regulation performance.
tls205b0 pin configuration data sheet 7 rev. 1.2, 2015-01-15 8 (dso-8 ep) 9, 10 (tson-10) i input. the device is supplied by the input pi n i. a capacitor at the input pin is required if the device is more than 6 inches away from the main input filter capacitor or if a non-negligible indu ctance is present at the input i 4) . the tls205b0 is designed to withstand re verse voltages on the input pin i with respect to gnd and output q. in the case of reverse input (e.g. due to a wrongly attached battery) the device will act as if ther e is a diode in series with its input. in this way there will be no reverse current fl owing into the regulator and no reverse voltage will appear at the load. hence, the device will protect both - the device itself and the load. 9 (dso-8 ep) 11 (tson-10) tab exposed pad. to ensure proper thermal performance, solder pin 11 of tson-10 to the pcb ground and tie directly to pin 6. in the case of dso-8 ep as well solder pin 9 to the pcb ground and tie directly to pin 6 (gnd). 1) a maximum value of 10 nf can be used for reducing output voltage noise over the bandwidth from 10 hz to 100 khz. 2) normally several microamperes. 3) typical value is 1 a. 4) in general the output impedance of a battery rises with frequen cy, so it is advisable to incl ude a bypass capacitor in batter y- powered circuits. depending on actual conditions an i nput capacitor in the range of 1 to 10 f is sufficient. pin symbol function
data sheet 8 rev. 1.2, 2015-01-15 tls205b0 general product characteristics 4 general product characteristics 4.1 absolute maximum ratings notes 1. stresses above the ones listed here may cause perma nent damage to the device. exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2. integrated protection func tions are designed to prevent ic destructi on under fault conditions described in the data sheet. fault conditions are considered as ?outside? normal operating range. pr otection functi ons are not designed for continuous repetitive operation. table 1 absolute maximum ratings 1) t j = -40 c to +150 c; all voltages with respect to gr ound, positive current flowing into pin (unless otherwise specified) 1) not subject to production te sting, specified by design. parameter symbol values unit note / test condition number min. typ. max. input voltage voltage v i -20 ? 20 v ? p_4.1.1 output voltage voltage v q -20 ? 20 v ? p_4.1.2 input to output differential voltage v i -v q -20 ? 20 v ? p_4.1.3 sense pin voltage v sense -20 ? 20 v ? p_4.1.4 adj pin voltage v adj -7 ? 7 v ? p_4.1.5 byp pin voltage v byp -0.6 ? 0.6 v p_4.1.6 enable pin voltage v en -20 ? 20 v ? p_4.1.7 temperatures junction temperature t j -40 ? 150 c ? p_4.1.8 storage temperature t stg -55 ? 150 c ? p_4.1.9 esd susceptibility all pins v esd -2 ? 2 kv hbm 2) 2) esd susceptibility, hbm accordin g to ansi/esda/jedec js001 (1.5 k ? , 100 pf) p_4.1.10 all pins v esd -1 ? 1 kv cdm 3) 3) esd susceptibility, charged device model ?cdm? according jedec jesd22-c101 p_4.1.11
tls205b0 general product characteristics data sheet 9 rev. 1.2, 2015-01-15 4.2 functional range note: within the functional or operating range, the ic operat es as described in the circuit description. the electrical characteristics are specif ied within the conditions given in th e electrical char acteristics table. 4.3 thermal resistance note: this thermal data was generated in accordance wit h jedec jesd51 standards. fo r more information, go to www.jedec.org . table 2 functional range parameter symbol values unit note / test condition number min. typ. max. input voltage range (fix voltage version) v i 3.8 v ? 20 v ? p_4.2.1 input voltage range (adjustable voltage version) v i 2.3 ? 20 v ? 1) 1) for the tls205b0 adjustable version the minimum limit of the functional range v i is tested and specified with the adj- pin connected to the q pin. p_4.2.2 output capacitor?s requirements for stability c q 3.3 ? ? f c byp =0nf 2) 2) for further details see corresponding graph. p_4.2.3 output capacitor?s requirements for stability c q 6.8 ? ? f 0 data sheet 10 rev. 1.2, 2015-01-15 tls205b0 general product characteristics junction to ambient r thja ? 69 ? k/w 300 mm 2 heatsink area on pcb 3) p_4.3.9 junction to ambient r thja ? 57 ? k/w 600 mm 2 heatsink area on pcb 3) p_4.3.10 1) not subject to production test, specified by design. 2) specified r thja value is according to jedec jesd51-2,-5,-7 at na tural convection on fr4 2s2p board; the product (chip+package) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70 m cu, 2 x 35 m cu). where applicable a thermal via array under the ex posed pad contacted the first inner copper layer. 3) specified r thja value is according to jedec jesd 51-3 at natural convection on fr4 1s0p board; the product (chip+package) was simulated on a 76.2 114.3 1.5 mm 3 board with 1 copper layer (1 x 70 m cu). table 3 thermal resistance 1) parameter symbol values unit note / test condition number min. typ. max.
tls205b0 electrical characteristics data sheet 11 rev. 1.2, 2015-01-15 5 electrical characteristics table 4 electrical characteristics -40 c < t j < 125 c; all voltages with respect to ground; positive current defined flowing out of pin; unless otherwise specified. parameter symbol values unit note / test condition number min. typ. max. minimum operating voltage 1) minimum operating voltage v i,min ?1.82.3v i q =500ma 2) 3) p_5.0.1 output voltage 4) tls205b0ejv33 tls205b0ldv33 v q 3.220 3.30 3.380 v 1 ma < i q <500ma; 4.3 v < v i <20v p_5.0.2 tls205b0ejv tls205b0ldv v q 1.190 1.220 1.250 v 1 ma < i q <500ma; 2.3v < v i <20v 3) p_5.0.3 line regulation tls205b0ejv33 tls205b0ldv33 ? v q ?120mv ? v i = 3.8 v to 20 v ; i q =1ma p_5.0.4 tls205b0ejv tls205b0ldv ? v q ?120mv ? v i = 2.0 v to 20 v ; i q =1ma 3) p_5.0.5 load regulation tls205b0ejv33 tls205b0ldv33 ? v q ?922mv t j =25c; v i =4.3v; ? i q = 1 to 500 ma p_5.0.6 tls205b0ejv33 tls205b0ldv33 ? v q ??38mv v i =4.3v; ? i q =1to500ma p_5.0.7 tls205b0ejv tls205b0ldv ? v q ?48mv t j =25c; v i =2.3v; ? i q = 1 to 500 ma 3) p_5.0.8 tls205b0ejv tls205b0ldv ? v q ??14mv v i =2.3v; ? i q = 1 to 500 ma 3) p_5.0.9 dropout voltage 2) 5) 6) dropout voltage v dr ? 130 190 mv i q =10ma; v i = v q,nom ; t j =25c p_5.0.10 dropout voltage v dr ? ? 250 mv i q =10ma; v i = v q,nom p_5.0.11 dropout voltage v dr ? 170 220 mv i q =50ma; v i = v q,nom ; t j =25c p_5.0.12 dropout voltage v dr ? ? 320 mv i q =50ma; v i = v q,nom p_5.0.13 dropout voltage v dr ? 200 240 mv i q =100ma; v i = v q,nom ; t j =25c p_5.0.14 dropout voltage v dr ? ? 340 mv i q =100ma; v i = v q,nom p_5.0.15 dropout voltage v dr ? 320 350 mv i q =500ma; v i = v q,nom ; t j =25c p_5.0.16 dropout voltage v dr ? ? 450 mv i q =500ma; v i = v q,nom p_5.0.17 quiescent current quiescent current 5) 7) (active-mode, en-pin high) i q ?3060a v i = v q,nom ; i q =0ma p_5.0.18
data sheet 12 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics quiescent current (off-mode, en-pin low) i q ?0.11a v i =6v; v en =0v; t j =25c p_5.0.19 gnd pin current 5) 7) gnd pin current i gnd ? 50 100 a v i = v q,nom ; i q =1ma p_5.0.20 gnd pin current i gnd ? 300 850 a v i = v q,nom ; i q =50ma p_5.0.21 gnd pin current i gnd ?0.72.2ma v i = v q,nom ; i q =100ma p_5.0.22 gnd pin current i gnd ?38ma v i = v q,nom ; i q =250ma p_5.0.23 gnd pin current i gnd ?1122ma v i = v q,nom ; i q =500ma; t j 25 c p_5.0.24 gnd pin current i gnd ?1131ma v i = v q,nom ; i q =500ma; t j <25c p_5.0.25 enable enable threshold high v th,en ?0.82.0v v q = off to on p_5.0.26 enable threshold low v tl,en 0.25 0.65 ? v v q = on to off p_5.0.27 en pin current 8) i en ?0.01?a v en =0v; t j = 25 c p_5.0.28 en pin current 8) i en ?1?a v en =20v; t j = 25 c p_5.0.29 adjust pin bias current 9) 10) adj pin bias current i bias,adj ?60?na t j = 25 c p_5.0.30 output voltage noise 10) output voltage noise tls205b0ejv 11) tls205b0ldv 11) e no ?41? v rms c q =10f; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.31 output voltage noise tls205b0ejv 11) tls205b0ldv 11) e no ?28? v rms c q =10f +250m ? resistor in series; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.32 output voltage noise tls205b0ejv 11) tls205b0ldv 11) e no ?29? v rms c q =22f c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.33 output voltage noise tls205b0ejv 11) tls205b0ldv 11) e no ?24? v rms c q =22f +250m ? resistor in series; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.34 table 4 electrical characteristics (cont?d) -40 c < t j < 125 c; all voltages with respect to ground; positive current defined flowing out of pin; unless otherwise specified. parameter symbol values unit note / test condition number min. typ. max.
tls205b0 electrical characteristics data sheet 13 rev. 1.2, 2015-01-15 output voltage noise tls205b0ejv33 tls205b0ldv33 e no ?45? v rms c q =10f; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.35 output voltage noise tls205b0ejv33 tls205b0ldv33 e no ?35? v rms c q =10f +250m ? resistor in series; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.36 output voltage noise tls205b0ejv33 tls205b0ldv33 e no ?33? v rms c q =22f c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.37 output voltage noise tls205b0ejv33 tls205b0ldv33 e no ?30? v rms c q =22f +250m ? resistor in series; c byp =10nf; i q =500ma; bw=10hzto100khz p_5.0.38 power supply ripple rejection 10) power supply ripple rejection psrr ?65?db v i - v q = 1.5 v (avg) ; v ripple =0.5vpp; f r = 120 hz ; i q =500ma p_5.0.39 output current limitation output current limit i q,limit 520 ? ? ma v i =7v; v q = 0 v p_5.0.40 output current limit i q,limit 520 ? ? ma v i = v q,nom +1v or 2.3 v 12) ; ? v q =-0.1v p_5.0.41 input reverse leakage current input reverse leakage i leak,rev ??1ma v i =-20v; v q = 0 v p_5.0.42 reverse output current 13) fixed voltage version i reverse ?1020a v q = v q,nom ; v i < v q,nom ; t j =25c p_5.0.43 adjustable voltage version i reverse ?510a v q =1.22v; v i < 1.22 v ; t j =25c 3) p_5.0.44 1) this parameter defines the minimum input voltage for which the device is powered up and provides the maximum nominal output current of 500 ma. the output voltage of the adjustable version in this condition depends on the chosen setting of the external voltage divider as we ll as on the applied conditions ? thus the device is either regulating its nominal output voltage or is in tracking mode.the 3.3 v fi xed voltage version is by definition in tracking mode for such low input voltages. 2) for the adjustable version of the tls205b0 the dropout voltage for certain output voltage / load conditions will be restricted by the minimum input voltage specification. 3) the adjustable version of the tls205b0 is tested / specified for these conditions with the adj pin connected to the q pin. table 4 electrical characteristics (cont?d) -40 c < t j < 125 c; all voltages with respect to ground; positive current defined flowing out of pin; unless otherwise specified. parameter symbol values unit note / test condition number min. typ. max.
data sheet 14 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics note: the listed characteristics are ensured over the operating range of the integrated circuit. typical characteristics specified mean valu es expected over the production spread. if not otherwise specified, typical characteristics apply at t a =25 c and the given supply voltage. 4) the operation conditions are limited by the maximum junction temperature. the regulated out put voltage specification will only apply for conditions where the limit of the maximum juncti on temperature is fulfilled. it will therefore not apply for all possible combinations of input voltage and output current at a given output voltage. wh en operating at maximum input voltage, the output current must be li mited for thermal reasons. the same holds true when operating at maximum output current where the input voltage range must be limited for thermal reasons. 5) to satisfy requirements for minimum input voltage, the tls2 05b0 adjustable version is tested and specified for these conditions with an external resistor divi der (two 250 k resistors) for an output volt age of 2.44 v. the external resistors will add a 5 a dc load on the output. 6) the dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a specified output current. in dropout, the output voltage will be equal to v i - v dr 7) gnd-pin current is tested with v i = v q,nom and a current source load. this means t hat this parameter is tested while being in the dropout region. the gnd pin current will in most cases de crease slightly at higher input voltages - please also refer to the corresponding typical performance graphs. 8) the en pin current flows into en pin. 9) the adj pin current flows into adj pin. 10) not subject to production test, specified by design. 11) adj pin connected to output pin q. 12) whichever of the two values of v i is greater in order to also satisfy the requirements for v i,min . 13) reverse output current is tested with t he i pin grounded and the q pin forced to the rated output voltage. this current flow s into the q pin and out of the gnd pin.
tls205b0 electrical characteristics data sheet 15 rev. 1.2, 2015-01-15 5.1 typical performance characteristics dropout voltage v dr versus output current i q guaranteed dropout voltage v dr versus output current i q dropout voltage v dr versus junction temperature t j quiescent current versus junction temperature t j 0 100 200 300 400 500 0 50 100 150 200 250 300 350 400 450 500 i q [a] v dr [mv] t j = ?40 c t j = 25 c t j = 125 c 0 100 200 300 400 500 0 50 100 150 200 250 300 350 400 450 500 i q [a] v dr [mv] = guaranteed limits t j 25 c t j 125 c ?50 0 50 100 0 50 100 150 200 250 300 350 400 450 500 t j [ c] v dr [mv] i q = 10 ma i q = 50 ma i q = 100 ma i q = 500 ma ?50 0 50 100 0 5 10 15 20 25 30 35 40 45 50 t j [ c] i q [a] v i = 6 v i q = 0 ma . v en = v i
data sheet 16 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics output voltage v q versus junction temperature t j (tls205b0ejv33) output voltage v q versus junction temperature t j (tls205b0ejv) quiescent current i q versus input voltage v i (tls205b0ejv33) quiescent current i q versus input voltage v i (tls205b0ejv) ?50 0 50 100 3.24 3.26 3.28 3.3 3.32 3.34 3.36 t j [ c] v q [v] i q = 1 ma ?50 0 50 100 1.2 1.205 1.21 1.215 1.22 1.225 1.23 1.235 1.24 t j [ c] v q [v] i q = 1 ma 0 2 4 6 8 10 0 100 200 300 400 500 600 700 800 v i [v] i q [a] v q,nom = 3.3 v i q,nom = 0 ma v en = v i t j = 25 c 0 5 10 15 20 0 5 10 15 20 25 30 35 40 v i [v] i q [a] v q,nom = 1.22 v r load = 250 k v en = v i t j = 25 c
tls205b0 electrical characteristics data sheet 17 rev. 1.2, 2015-01-15 gnd pin current i gnd versus input voltage v i (tls205b0ejv33) gnd pin current i gnd versus input voltage v i (tls205b0ejv) gnd pin current i gnd versus input voltage v i (tls205b0ejv33) gnd pin current i gnd versus input voltage v i (tls205b0ejv) 0 2 4 6 8 10 0 200 400 600 800 1000 1200 v i [v] i gnd [a] [* for v q = 3.3 v] t j = 25 c r load = 3.3 k / i q = 1 ma* r load = 330 / i q = 10 ma* r load = 66 / i q = 50 ma* 0 2 4 6 8 10 0 50 100 150 200 250 300 350 400 v i [v] i gnd [a] [* for v q = 1.22 v] t j = 25 c r load = 1.22 k / i q = 1 ma* r load = 122 / i q = 10 ma* r load = 24.4 / i q = 50 ma* 0 2 4 6 8 10 0 2 4 6 8 10 12 14 16 v i [v] i gnd [ma] [* for v q = 3.3 v] t j = 25 c r load = 33.0 / i q = 100 ma* r load = 11.0 / i q = 300 ma* r load = 6.60 / i q = 500 ma *. 0 2 4 6 8 10 0 2 4 6 8 10 12 14 16 v i [v] i gnd [ma] [* for v q = 1.22 v] t j = 25 c r load = 12.2 / i q = 100 ma* r load = 4.07 / i q = 300 ma* r load = 2.44 / i q = 500 ma *.
data sheet 18 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics gnd pin current i gnd versus output current i q en pin threshold (on-to-off) versus junction temperature t j en pin threshold (off-to-on) versus junction temperature t j en pin input current (on-to-off) versus en pin voltage v en 0 100 200 300 400 500 0 2 4 6 8 10 12 i q [ma] i gnd [ma] v i = v q,nom + 1 v t j = 25 c ?50 0 50 100 0 0.2 0.4 0.6 0.8 1 1.2 t j [ c] v en,th [v] 1 ma 500 ma ?50 0 50 100 0 0.2 0.4 0.6 0.8 1 1.2 t j [ c] v en,th [v] 1 ma 500 ma 0 5 10 15 20 0 0.2 0.4 0.6 0.8 1 1.2 1.4 v en [v] i en [a] t j = 25 c v i = 20 v
tls205b0 electrical characteristics data sheet 19 rev. 1.2, 2015-01-15 en pin current versus junction temperature t j current limit versus input voltage v i current limit versus junction temperature t j reverse output current versus output voltage v q ?50 0 50 100 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 t j [ c] i en [a] v en = 20 v 0 1 2 3 4 5 6 7 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 v i [v] i q,max [a] v q = 0 v t j = 25 c ?50 0 50 100 0 0.2 0.4 0.6 0.8 1 1.2 t j [ c] i q,max [a] v i = 7 v v q = 0 v 0 2 4 6 8 10 0 10 20 30 40 50 60 70 80 90 v q [v] i q,rev [a] v i = 0 v t j = 25 c v q.nom = 1.22 v (adj) v q.nom = 3.3 v (v33)
data sheet 20 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics reverse output current versus junction temperature t j minimum input voltage 1) versus junction temperature t j 1) v i,min is referred here as the minimum input voltage for which the requested current is provided and v q reaches 1 v. load regulation versus junction temperature t j adjust pin bias current versus junction temperature t j ?50 0 50 100 0 2 4 6 8 10 12 14 16 18 20 t j [ c] i q,rev [a] v i = 0 v v q.nom = 1.22 v (adj) v q.nom = 3.3 v (v33) ?50 0 50 100 0 0.5 1 1.5 2 2.5 t j [ c] v i,min [v] i q = 100 ma i q = 500 ma ?50 0 50 100 ?25 ?20 ?15 ?10 ?5 0 5 t j [ c] v q [mv] i q = 1 ma to 500 ma v33: v i = 4.3 v v q nom = 3.3 v adj: v i = 2.3 v v q nom = 1.22 v ?50 0 50 100 0 20 40 60 80 100 120 140 t j [ c] i adj [na]
tls205b0 electrical characteristics data sheet 21 rev. 1.2, 2015-01-15 esr stability versus output current i q (for c q =3.3f) esr( c q ) with c byp =10nf versus output capacitance c q input ripple rejection psrr versus frequency f input ripple rejection psrr versus junction temperature t j esr max c byp = 0 nf esr min c byp = 0 nf esr max c byp = 10 nf esr min c byp = 10 nf 0 100 200 300 400 500 10 ?1 10 0 10 1 i q [ma] esr(c q ) [ ] c q = 3.3 f (0.06 is measurement limit) 2 3 4 5 6 7 0 0.5 1 1.5 2 2.5 3 c q [f] esr(c q ) [ ] stable region above blue line c byp = 10 nf measurement limit i q =500ma c byp =0 nf i q =500ma c byp =10nf i q =50ma c byp =0 nf i q =50ma c byp =10nf 10 100 1k 10k 100k 0 10 20 30 40 50 60 70 80 90 100 f [hz] psrr [db] v i = v q,nom + 1.5 v v ripple = 0.5 v pp c q = 10 f ?50 0 50 100 52 54 56 58 60 62 64 66 68 t j [ c] psrr [db] v i = v q,nom + 1.5 v v ripple = 0.5 v pp f ripple = 120 hz c q = 10 f i q = 500ma c byp = 0 nf i q = 500ma c byp = 10nf
data sheet 22 rev. 1.2, 2015-01-15 tls205b0 electrical characteristics output noise spectral density (adj) versus frequency f ( c q = 10 f, i q = 50 ma) output noise spectral density (adj) versus frequency f ( c q = 22 f, i q = 50 ma) output noise spectral density (3.3v) versus frequency f ( c q = 10 f, i q = 50 ma) output noise spectral density (3.3v) versus frequency f ( c q = 22 f, i q = 50 ma) c byp = 0 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=250m 10 1 10 2 10 3 10 4 10 5 10 ?2 10 ?1 10 0 10 1 f [hz] output spectral noise density v/ hz c q = 10 f i q = 50 ma c byp = 0 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=250m output spectral noise density v/ hz c q = 22 f i q = 50 ma c byp = 0 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=250m output spectral noise density v/ hz c q = 10 f i q = 50 ma c byp = 0 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=0 c byp = 10 nf; esr(c q )=250m output spectral noise density v/ hz c q = 22 f i q = 50 ma
tls205b0 electrical characteristics data sheet 23 rev. 1.2, 2015-01-15 transient response c byp = 0 nf (tls205b0ejv33) transient response c byp = 10 nf (tls205b0ejv33) -0,3 -0,2 -0,1 0 0,1 0,2 0,3 0 100 200 300 400 500 600 700 800 900 1000 v q deviation / [v] time ( s) c q = 10 f c byp = 0 nf v i = 6 v 0 100 200 300 400 500 600 0 100 200 300 400 500 600 700 800 900 1000 load step / [ma] time ( s) i q : 100 to 500 ma -0,15 -0,1 -0,05 0 0,05 0,1 0,15 0 102030405060708090100 v q deviation / [v] time / [ s] c q = 10 f c byp = 10 nf v i = 6v 0 100 200 300 400 500 600 0 102030405060708090100 load step / [ma] time / [ s] i q : 100 to 500 ma
data sheet 24 rev. 1.2, 2015-01-15 tls205b0 application information 6 application information note: the following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. figure 5 typical application circuit tls205b0 (fixed voltage version) figure 6 typical application circuit tls205b0 (adjustable version) note: this is a very simplified example of an applicatio n circuit. the function must be verified in the real application. 1) 2) 1) please note that in case a non-negligible inductance at the i nput pin i is present, e.g. due to long cables, traces, parasiti cs, etc, a bigger input capacitor c i may be required to filter its infl uence. as a rule of thumb if the i pin is more than six inches away from the main input filter c apacitor an input capacitor value of c i = 10 f is recommended. 2) for specific needs a small optional resistor may be placed in series to very low esr output capacitors c q for enhanced noise performance (for details please see ?bypass capacitance and low noise performance? on page 25 ). r load c byp c q c i i gnd q en sense byp tls205b0 v i gnd 10nf 10f 1f v q r load c byp c i i gnd q en adj byp tls205b0 (adj) v i gnd 10nf 10f 1f c q v q r 2 r 1 calculation of v q : v q = 1.22v x (1 + r 2 / r 1 ) + (i adj x r 2 )
tls205b0 application information data sheet 25 rev. 1.2, 2015-01-15 the tls205b0 is a 500 ma low dropout regulator with ve ry low quiescent current and enable-functionality. the device is capable of supplying 500 m a at a dropout voltage of 320 mv. ou tput voltage noise numbers down to 24 v rms can be achieved over a 10 hz to 100 khz bandwi dth with the addition of a 10 nf reference bypass capacitor. the usage of a re ference bypass capacitor will additionally im prove transient respon se of the regulator, lowering the settling time for transient load conditions. the device has a low operating quiescent current of typical 30 a that drops to less than 1 a in shutdown (en-pin pulle d to low level). the device also incorporates several protection features which makes it idea l for battery-powered systems. it is protected against bo th reverse input and reverse output voltages. 6.1 adjustable operation the adjustable version of the tls205b0 has an output voltage range of 1.22 v to 20 v - v dr . the output voltage is set by the ratio of two external resistors, as it can be seen in figure 6 . the device controls t he output to maintain the adj pin at 1.22 v referenced to ground. the current in r1 is then equal 1.22 v / r1 and the current in r2 equals the current in r1 plus the adj pin bias current. the adj pin bias current, which is ~60 na @ 25 c, flows through r2 into the adj pin. the value of r1 should be not greater than 250 k ? in order to minimize errors in the output voltage caused by the adj pin bias current. note that when the device is shutdown (i.e. low level applied to en pin) the output is tu rned off and consequently the di vider current will be zero. fo r details of the adj pin bias current see also the corresponding typical performance graph ?adjust pin bias current versus junction temperature t j ? on page 20 . 6.2 kelvin sense connection for the fixed voltage version of the tls205b0 the sense pin is the input to the error amplifier. an optimum regulation will be obtained at the point where the sense pin is connected to the output pin q of the regulator. in critical applications however small voltag e drops may be caused by the resistance r p of the pc-traces and thus may lower the result ing voltage at the load. this effect may be eliminated by connecting the sense pin to the output as close as possible at the load (see figure 7 ). please note that the voltage drop across the external pc trace will add up to the dropout voltage of th e regulator. figure 7 kelvin sense connection 6.3 bypass capacitance and low noise performance the tls205b0 regulator may be used in combination with a bypass capacitor connecting the output pin q to the byp pin in order to minimize output voltage noise 1) . this capacitor will bypass th e reference of the regulator, providing a low frequ ency noise pole. the noise pole provided by such a bypass capacitor will lower the output 1) a good quality low leakage capacitor is recommended. c i i gnd q en sense byp tls205b0 v i r load c q r p r p
data sheet 26 rev. 1.2, 2015-01-15 tls205b0 application information voltage noise in the considered bandwidth. for a given outp ut voltage actual numbers of the output voltage noise will - next to the bypass capacitor itse lf - be dependent on th e capacitance of the a pplied output capacitor c q and its esr: in case of the tls205b0ejv / tls205b0ldv applied with unity gain (i.e. v q = 1.22v) the usage of a bypass capacitor of 10 nf in comb ination with a (low esr) ceramic c q of 10 f will result in output voltage noise numbers of typical 41 v rms . this output noise level can be reduced to typical 28 v rms under the same conditions by adding a small resistor of ~250 m ? in series to the 10 f ceramic output capacitor acting as additional esr. a reduction of the output voltage noise can also be achieved by increasing capacitance of the output capacitor. for c q = 22 f (ceramic low esr) the output vo ltage noise will be typically around 29 v rms and can again be further lowered to 24 v rms by adding a small resistance of ~250 m ? in series to c q . in case of the fix voltage version tls205b0ejv33 / tls205b0ldv33 the ou tput voltage noise for the described cases vary from 45 v rms down to 30 v rms . for further details please also see ?output voltage noise 10) ? on page 12 ,, of the electrical characteristics. pl ease note that next to reducing the output voltage noise level the usage of a bypass capacitor has the additional benefit of improving transient response which will be also explained in the next chapter. however one needs to take into considerati on that on the other hand the regulator start-up time is proportional to the size of the bypass capacitor and slows down to values around 15 ms when using a 10 nf bypass capacitor in combination with a 10 f c q output capacitor. 6.4 output capacitance and transient response the tls205b0 is designed to be stable with a wide rang e of output capacitors. the esr of the output capacitor is an essential parameter wit h regard to stability, most notably with small capacitors . a minimum output capacitor of 3.3 f with an esr of 3 ? or less is recommended to prevent oscillati ons. like in general for ldo?s the output transient response of the tls205b0 will be a functi on of the output capacitance. larger values of output capacitance decrease peak deviations and thus improv e transient response for larger load current changes. bypass capacitors, used to decouple in dividual components powe red by the tls205b0 will increase the effective output capacitor value. please note th at with the usage of bypass capacitors for low noise operation either larger values of output capacitors may be needed or a minimum esr requirement of c q may have to be considered (see also typical performance graph ?esr( c q ) with c byp = 10 nf versus output capacitance c q ? on page 21 as example). in conjunction with the usage of a 10 nf bypass capacitor an output capacitor c q 6.8 f is recommended. the benefit of a bypass capacitor to th e transient response performance is impressive and illustrated as one example in figure 8 where the transient response of t he tls205b0ejv33 to one and the same load step from 100 ma to 500 ma is shown with and with out a 10 nf bypass capacitor: for the given configuration of c q = 10 f with no bypass capacitor th e load step will settle in the ra nge of less than 100 s while for c q = 10 f in conjunction with a 10 nf bypa ss capacitor the sa me load step will settle in the range of 10 s. due to the shorter reaction time of the regulator by adding the bypass capacitor not only the settling time improves but also output voltage deviations due to load steps are sharply reduced. figure 8 influence of c byp : example of transient response to one and the same load step with and without c byp of 10 nf ( i q : 100 ma to 500 ma, tls205b0ejv33) -0,3 -0,2 -0,1 0 0,1 0,2 0,3 0 100 200 300 400 500 600 700 800 900 1000 v q deviation / [v] time ( s) c_byp = 0nf c_byp = 10nf c q = 10 f c byp = 0 vs 10nf v i = 6 v
tls205b0 application information data sheet 27 rev. 1.2, 2015-01-15 6.5 protection features the tls205b0 regulators incorporate several protection features which make them ideal for use in battery- powered circuits. in addition to normal protection features associated with mo nolithic regulators like current limiting and thermal limiting the device is protected against reve rse input voltage, reverse output voltage and reverse voltages from out put to input. current limit protection and thermal overload protection are intended to protect the device against current overload conditions at the output of the device. for normal oper ation the junction temperat ure must not exceed 125 c. the input of the device will withstand reverse voltages of 20 v. current fl owing into the device will be limited to less than 1 ma (typically less than 100 a) and no negative voltage will appear at th e output. the device will protect both itself and the load. this provides pr otection against batteries being plugged backwards. the output of the tls205b0 can be pulled below ground without damaging the device. if the input is left open- circuit or grounded, the output can be pulled below ground by 20 v. under such conditions the output of the device by itself behaves like an open circuit with practically no current flowing out of the pin 1) . in more application relevant cases however where the output is either connected to the sense pin (fix voltage variant) or tied either via an external voltage divider or directly to the adj pin (adjusta ble variant) a small current will be present from this origin. in the case of the fixed vo ltage version this current will typically be below 100 a while for the adjustable version it depends on the magnitude of the top re sistor of the external voltage divider 2) . if the input is powered by a voltage source the output will source the short ci rcuit current of the device and will protec t itself by therma l limiting. in this case grounding the en pin will turn off the device and st op the output from sourcing the shor t-circuit current. the adj pin of the adjustabl e device can be pulled above or below grou nd by as much as 7 v without damaging the device. if the input is grounded or left open-circuit, the adj pin will act inside this voltage range like a large resistor (typically 100 k ? ) when being pulled above ground and like a resistor (typically 5 k ? ) in series with a diode when being pulled below ground. in situations where the adj pin is at risk of being pulled outside its absolute maximum ratings 7 v the adj pin current must be limited to 1 ma (e.g. in cases where the adj pin is connected to a resistor divider that would pull the adj pin above it s 7 v clamp voltage). let?s c onsider for example the case where a resistor divider is used to provide a 1.5 v out put from the 1.22 v reference and the output is forced to 20 v. the top resistor of the resistor divider must then be chosen to limit the current into the adj pin to 1 ma or less when the adj pin is at 7 v. the 13 v difference between output and adj pin divided by the 1 ma maximum current into the adj pin requires a minimum resistor value of 13 k ? . in circuits where a backup battery is required, several different input/output conditions can occur. the output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage or is left open-circuit. current flow ba ck into the outp ut will follow the curve as shown in figure 9 below. 1) typically < 1 a for the mentioned conditions, v q being pulled below ground with other pins either grounded or open. 2) in case there is no external voltage divider applied i.e. the adj pin is directly connected to the output q and the output is pulled below ground by 20 v the current flowing out of the adj pin will be typically ~ 4 ma. please ensure in such cases that the absolute maximum ratings of the adj pin are respected.
data sheet 28 rev. 1.2, 2015-01-15 tls205b0 application information figure 9 reverse output current 0 2 4 6 8 10 0 10 20 30 40 50 60 70 80 90 v q [v] i q,rev [a] v i = 0 v t j = 25 c v q.nom = 1.22 v (adj) v q.nom = 3.3 v (v33)
tls205b0 package outlines data sheet 29 rev. 1.2, 2015-01-15 7 package outlines figure 10 pg-dso-8 exposed pad package outlines figure 11 pg-tson-10 package outlines green product (rohs compliant) to meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. green products are rohs-compliant (i.e pb-free finish on leads and suitable for pb-free soldering according to ipc/jedec j-std-020). pg-dso-8-27-po v01 14 85 8 14 5 8x 0.41 0.0 9 2) m 0.2 d c a-b 1.27 c stand off +0 -0.1 0.1 (1.45) 1.7 max. 0.08 seating plane c a b 4. 9 0.1 1) a-b c 0.1 2x 3 ) jedec reference ms-012 variation ba 1) does not include plastic or metal protrusion of 0.15 max. per side 2) dambar protrusion shall be maximum 0.1 mm total in excess of lead width bottom view 0.2 3 0.2 2.65 0.2 0.2 d 6 m d 8x 0.64 0.25 3. 9 0.1 1) 0.1 0.35 x 45? cd2x +0.06 0.1 9 8 ? max. index marking pin 1 m a rking pin 1 m a rking pg-t s on-10-2-po v02 0.1 0.2 0.1 0.25 0.1 0.55 0.96 0.1 2.5 8 0.1 0 +0.05 0.1 0.1 0. 3 6 0.1 0.5 3 0.1 0.1 0.25 0.5 0.1 3 . 3 0.1 3 . 3 0.1 1 0.1 0.71 0.1 1.6 3 0.1 1.4 8 0.1 z 0.05 0.07 min. z (4:1) for further info rmation on alternative pa ckages, please visit our website: http://www.infineon.com/packages . dimensions in mm
data sheet 30 rev. 1.2, 2015-01-15 tls205b0 revision history 8 revision history revision date changes 1.2 2015-01-15 data sheet - revision 1.2: ? pg - tson - 10 package variants added: product overview, pin configura- tion, thermal resistance, etc - wordi ng and description added or updated accordingly. ? editorial changes. 1.1 2014-06-03 data sheet - revision 1.1: ? order of footnotes in table 3 ?thermal resistance? on page 9 corrected. ? application information chapter 6.5 updated: clarification and correction of wording. typical values updated and footnotes added. ? editorial changes. 1.0 2014-02-27 data sheet - initial release
edition 2015-01-15 published by infineon technologies ag 81726 munich, germany ? 2015 infineon technologies ag all rights reserved. legal disclaimer the information given in this docu ment shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, infine on technologies hereby disclaims any and all warranties and liabilities of any kind, including witho ut limitation, warranties of non-infrin gement of intellectua l property rights of any third party. information for further information on technology, delivery terms and conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the nearest infineon technologies office. infineon technologies compon ents may be used in life-su pport devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safe ty or effectiveness of that de vice or system. life support devices or systems are intended to be implanted in the hu man body or to support an d/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

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