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general description the MAX5084/max5085 high-voltage linear regulators operate from an input voltage range of 6.5v to 65v and deliver up to 200ma of output current. these devices consume only 50? (typ) of quiescent current with no load and 6a (typ) in shutdown (en pulled low). both devices include a set input, which when connected to ground, selects a preset output voltage of 5v (MAX5084) or 3.3v (max5085). alternatively, the out- put voltage can be adjusted from 2.54v to 11v by connecting the set pin to the regulator? output through a resistive divider network. the MAX5084/ max5085 also include an out_sense pin, which allows remote voltage sensing right at the load, thus eliminating the voltage drop caused by the line imped- ance. both devices are short-circuit protected and include thermal shutdown. the MAX5084/max5085 operate over the -40? to +125? automotive temperature range and are avail- able in a space-saving 3mm x 3mm thermally enhanced 6-pin tdfn package. applications automotive industrial home security telecom/networking features ? wide operating input voltage range (6.5v to 65v) ? thermally enhanced 3mm x 3mm 6-pin tdfn package dissipates 1.905w at +70? ? guaranteed 200ma output current ? 50? no-load supply current ? preset 3.3v, 5.0v, or adjustable (from 2.54v to 11v) output voltage ? remote load sense ? thermal and short-circuit protection ? -40? to +125? operating temperature range ? set input for adjustable output voltage ? enable input MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn ________________________________________________________________ maxim integrated products 1 top view 4 5 6 set out_sense out 3 2 1 + gnd en in tdfn MAX5084 max5085 pin configuration ordering information v in = 6.5v to 65v 5v (MAX5084) 3.3v (max5085) 10 f 10 f out out_sense set in load en gnd MAX5084 max5085 t ypical operating circuit 19-3928; rev 0; 1/06 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ep = exposed paddle. + denotes lead-free package. part temp range pin- package top mark pkg code m a x5 0 8 4 att+ t - 40c to + 1 25c 6 tdfn-ep* aji t633-2 m a x5 0 8 5 att+ t - 40c to + 1 25c 6 tdfn-ep* ajj t633-2 selector guide appears at end of data sheet.
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = 14v, i out = 1ma, c in = c out = 10?, v en = 2.4v, t a = t j = -40? to +125?, unless otherwise noted. typical specifications are at t a = +25?, unless otherwise noted.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. in to gnd ...............................................................-0.3v to +80v en to gnd..............................................................-0.3v to +80v set, out, out_sense to gnd................-0.3v to the lesser of (v in + 0.3v) or +13.2v out_sense to out..............................................-0.3v to +0.3v short-circuit duration (v in 65v) ..............................continuous maximum current into any pin (except in and out).......?0ma continuous power dissipation (t a = +70?) 6-pin tdfn-ep (derate 23.8mw/? above +70?) ... 1904.8mw* thermal resistance: ja ................................................................................42?/w jc ...............................................................................8.5?/w operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units input voltage range v in v in > v out + 1.5v 6.5 65 v i out = 0 51 140 i out = 100? 51 140 ? supply current i q measured at gnd, set = gnd i out = 200ma 2 4 ma shutdown supply current i shdn v en 0.4v 6 16 a regulator guaranteed output current i out v out = v out(nom) ?% 200 ma v in = 9v to 16v, set = gnd, i out = 5ma to 200ma, out_sense connected to out (MAX5084) 4.8 5.0 5.2 v i n = 6.5v to 21v , s e t = gn d , i ou t = 5m a to 100m a, out_sense connected to out (MAX5084) 4.85 5.0 5.15 v in = 9v to 16v, set = gnd, i out = 5ma to 50ma, out_sense connected to out (MAX5084) 4.9 5.1 output voltage accuracy v out v in = 6.5v, set = gnd, i out = 1ma to 200ma, out_sense connected to out (max5085) 3.168 3.300 3.432 v output voltage range i out = 5ma, adjustable output 2.54 11 v dropout voltage ? v do i out = 200ma, v out = 5v, MAX5084 (note 2) 0.9 1.5 v startup response time rising edge of v in to rising edge of v out , r l = 500 ? (note 3) 400 ? MAX5084, set = gnd -1 +1 v in from 8v to 65v max5085, set = gnd -0.5 +0.5 line regulation ? v out / ? v in v in from 14v to 65v adjustable output from 2.54v to 11v -0.5 +0.5 mv/v * as per jedec51 standard (multilayer board).
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn _______________________________________________________________________________________ 3 note 1: specifications at -40? are guaranteed by design and not production tested. note 2: dropout voltage is defined as (v in - v out ) when v out is 100mv below the value of v out when v in = v out + 3v. note 3: startup time measured from 50% of v in to 90% of v out . electrical characteristics (continued) (v in = 14v, i out = 1ma, c in = c out = 10?, v en = 2.4v, t a = t j = -40? to +125?, unless otherwise noted. typical specifications are at t a = +25?, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units regulator on 2.4 enable voltage v en regulator off 0.4 v v en = 2.4v 0.5 1 v en = 14v 4 8 enable input current i en v en = 65v 14 35 ? out to out_sense internal resistor r out_ sense i out_sense = 10ma 8 15 24 ? set reference voltage v set i out = 10ma 1.220 1.251 1.280 v set input leakage current i set v set = 1.251v -100 +1 +100 na MAX5084, set = gnd 0.3 1 max5085, set = gnd 0.3 1 load regulation ? v out / ? i out i out from 1ma to 200ma, out_sense = out adjustable output from 2.54v to 11v 0.5 2 mv/ma power-supply rejection ratio psrr i out = 10ma, f = 100hz, v in_ripple = 500mv p-p , v out = 5v 55 db v in = 8v to 14v 220 340 500 short-circuit current i sc v in = 65v 340 ma thermal shutdown t shdn +160 ? thermal shutdown hysteresis t hyst 10 ?
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn 4 _______________________________________________________________________________________ t ypical operating characteristics (v in = 14v, c in = c out = 10?, v en = v in , t a = +25?, unless otherwise noted.) output voltage vs. input voltage MAX5084 toc01 v in (v) v out (v) 60 55 45 50 15 20 25 30 35 40 5 10 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 065 i out = 0 no-load ground current vs. temperature MAX5084 toc03 temperature ( c) i gnd ( a) 125 110 80 95 -10 5 20 35 50 65 -25 10 20 30 40 50 60 70 80 90 100 0 -40 140 v in = 65v v in = 14v v in = 6.5v shutdown supply current vs. temperature MAX5084 toc03 temperature ( c) i gnd ( a) 125 110 80 95 -10 5 20 35 50 65 -25 1 2 3 4 5 6 7 8 9 10 0 -40 140 output voltage vs. temperature MAX5084 toc04 temperature ( c) v out (v) 125 110 80 95 -10 5 20 35 50 65 -25 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 4.75 -40 140 i out = 1ma i out = 10ma ground current vs. temperature MAX5084 toc05 i gnd ( a) 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 0 temperature ( c) 125 110 80 95 -10 5 20 3 55065 -25 -40 140 i out = 200ma i out = 100ma i out = 50ma output voltage vs. load current and temperature MAX5084 toc06 temperature ( c) v out (v) 125 110 80 95 -10 5 20 35 50 65 -25 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 4.75 -40 140 i out = 100ma i out = 200ma i out = 50ma dropout voltage vs. load current MAX5084 toc07 i out (ma) v dropout (v) 190 170 130 150 50 70 90 110 30 0.15 0.30 0.45 0.60 0.75 0.90 1.05 1.20 1.35 1.50 0 10 v out = 5v power-supply rejection ratio vs. frequency MAX5084 toc08 frequency (khz) psrr (db) 100 10 1 -70 -60 -50 -40 -30 -20 -10 0 -80 0.1 1000 i out = 10ma line-transient response MAX5084 toc09 400 s/div 0a i out 100ma/div v out 100mv/div ac-coupled
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn _______________________________________________________________________________________ 5 input voltage step response MAX5084 toc10 400 s/div 0v v in 20v/div v out 500mv/div ac-coupled startup response MAX5084 toc11 400 s/div v out 2v/div v in 50v/div 0v i out = 10ma 0v enable startup response MAX5084 toc12 100 s/div v en 1v/div v out 2v/div v in = 14v i out = 0 0v 0v enable startup response MAX5084 toc13 100 s/div v en 1v/div v out 2v/div v in = 14v i out = 200ma 0v 0v enable startup response MAX5084 toc14 100 s/div v en 1v/div v out 2v/div v in = 65v i out = 0 0v 0v enable startup response MAX5084 toc15 100 s/div v en 1v/div v out 2v/div v in = 65v i out = 200ma 0v 0v shutdown response MAX5084 toc16 4ms/div v en 1v/div v out 2v/div v in = 14v i out = 10ma 0v 0v ground current distribution (t a = -40 c) MAX5084 toc17 i gnd ( a) number of units 52 49 48 47 46 45 44 43 2 4 6 8 10 0 42 36 units tested ground current distribution (t a = +125 c) MAX5084 toc18 i gnd ( a) number of units 60 58 55 54 53 52 5 10 15 20 25 0 51 54 units tested t ypical operating characteristics (continued) (v in = 14v, c in = c out = 10?, v en = v in , t a = +25?, unless otherwise noted.)
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn 6 _______________________________________________________________________________________ MAX5084 max5085 error amplifier 1.251v reference mux 5m ? 15 ? en in out set gnd out_sense internal shutdown circuitry overcurrent sense startup circuitry thermal shutdown figure 1. block diagram pin description pin name function 1i n regulator supply input. supply voltage ranges from 6.5v to 65v. bypass with a 10? capacitor to gnd. 2en enable input. force en high to turn on the regulator. pull en low to place the device in a low-power shutdown mode. en has an internal 5m ? resistor to gnd. 3 gnd ground 4 set feedback input for setting the output voltage. connect set to gnd for a fixed 5v output (MAX5084), or 3.3v output (max5085). connect to a resistive divider from out to set to gnd to adjust the output voltage from 2.54v to 11v. 5 out_sense output voltage sensing input. out_sense is used to kelvin sense the output voltage in fixed-output voltage mode. out_sense can be left floating or connected directly to the load for accurate load regulation. 6 out regulator output. bypass out to gnd with a minimum 10? ceramic capacitor. ? p exposed pad. connect to gnd for heatsinking.
detailed description the MAX5084/max5085 are high-voltage linear regula- tors with a 6.5v to 65v input voltage range. the devices guarantee 200ma output current and are available with preset output voltages of 3.3v or 5v. both devices can be used to provide adjustable outputs from 2.54v to 11v by connecting a resistive divider from out to set to gnd. thermal shutdown and short-circuit protection are provided to prevent damage during overtempera- ture and overcurrent conditions. an output sense pin (out_sense) provides for kelvin sensing of the output voltage, thereby reducing the error caused by internal and external resistances. an enable input (en) allows the regulators to be turned on/off through a logic-level voltage. driving en high turns on the device, while dri- ving en low places the device in a low-power shut- down mode. in shutdown, the supply current reduces to 6? (typ). both devices operate over the -40c to +125? temperature range and are available in a 3mm x 3mm, 6-pin tdfn package capable of dissipating 1.905w at t a = +70?. regulator the regulator accepts an input voltage range from 6.5v to 65v. the MAX5084/max5085 offer fixed-output volt- ages of 5v and 3.3v, respectively. the output voltage is also adjustable from 2.54v to 11v by connecting an external resistive divider network between out, set, and gnd (see r1 and r2 in figure 2). the MAX5084/ max5085 automatically determine the feedback path depending on the voltage at set. enable input (en) en is a logic-level enable input, which turns the MAX5084/max5085 on/off. drive en high to turn on the device and drive en low to place the device in shut- down. when in shutdown, the MAX5084/max5085 typi- cally draw 6a of supply current. en can withstand voltages up to 65v, allowing en to be connected to in for an always-on operation. en has an internal 5m ? resistor to gnd. remote sensing (out_sense) out_sense provides for kelvin sensing of the fixed output voltage, thus eliminating errors due to the volt- age drop in the trace resistance between out and the load. out_sense is internally connected to out through a 15 ? resistor (figure 1), and can be left float- ing when remote sensing is not required. however, if accurate output voltage regulation at the load is required, then connect out_sense directly to the load. thermal protection when the junction temperature exceeds +160?, an internal thermal sensor signals the shutdown logic to turn off the pass transistor and allows the ic to cool. the thermal sensor turns the pass transistor on again after the junction temperature cools by 10?. this results in a cycled output during continuous thermal overload conditions. thermal protection protects the MAX5084/max5085 in the event of fault conditions. for continuous operation, do not exceed the maximum junction temperature rating of +150?. output short-circuit current limit the MAX5084/max5085 feature a 340ma current limit. the output can be shorted to gnd for an indefinite period of time without damage to the device. during a short circuit, the power dissipated across the pass tran- sistor can quickly heat the device. when the die tem- perature reaches +160?, the MAX5084/max5085 shut down and automatically restart after the die temperature cools by 10?. this results in a pulsed output operation. applications information output voltage setting the MAX5084/max5085 feature dual mode tm opera- tion: they operate in either a preset output voltage mode or an adjustable output voltage mode. connect set to gnd for preset output voltage operation. in pre- set mode, internal feedback resistors set the MAX5084? internal linear regulator to 3.3v, and the max5085? inter- nal linear regulator to 5v. in adjustable mode, select an output from 2.54v to 11v using a resistive divider (see r1 and r2 in figure 2) connected from out to set to gnd. in adjustable mode, first select the resistor from set to gnd (r2) in the 1k ? to 100k ? range. the resis- tor from out to set (r1) is then calculated by: where v set = 1.251v. available output current calculation the MAX5084/max5085 provide up to 200ma of con- tinuous output current. the input voltage extends to 65v. package power dissipation limits the amount of output current available for a given input/output volt- age and ambient temperature. figure 3 depicts the maximum power dissipation curve for these devices. rrx v v out set 12 1 =? ? ? ? ? ? ? MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn _______________________________________________________________________________________ 7 dual mode is a trademark of maxim integrated products, inc.
MAX5084/max5085 use figure 3 to determine the allowable package dissi- pation for a given ambient temperature. alternately, use the following formula to calculate the allowable pack- age dissipation: after determining the allowable package dissipation, calculate the maximum output current using the follow- ing formula: the above equations do not include the negligible power dissipation from self-heating due to the device? ground current. example 1: t a = +85? v in = 14v v out = 5v find the maximum allowable output current. first calcu- late package dissipation at the given temperature as follows: p d = 1.905w ?0.0238w/? (85? ?70?) = 1.548w then determine the maximum output current: example 2: t a = +125? v in = 14v v out = 3.3v calculate package dissipation at the given temperature as follows: p d = 1.905w ?0.0238w/? (125? ?70?) = 596mw and establish the maximum output current: example 3: t a = +50? v in = 9v v out = 5v i mw vv ma out max () . = ? = 596 14 3 3 56 i out max w vv ma () . = ? = 1 548 14 5 172 i out(max) = p d v in ?v out 200 ma p w for t c wwcxtc for c t c d a aa . .. / ( ) = + ?+<+ ? ? ? ? ? ? 1 905 70 1 905 0 0238 70 70 125 65v, 200ma, low-quiescent-current linear regulators in tdfn 8 _______________________________________________________________________________________ v in = 6.5v to 65v v out = 2.5v to 11v (200ma) 10 f 10 f out out_sense set in r1 load r2 en gnd MAX5084 max5085 figure 2. adjustable output voltage operation MAX5084 fig03 temperature ( c) p d (w) 20 40 60 80 100 120 140 -20 0 0.6 0.4 0.2 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 0 -40 maximum power 1.905w derate 23.8mw/ c figure 3. calculated maximum power dissipation vs. temperature
example 4: calculate package dissipation at the given temperature as follows: p d = 1.905w find the maximum output current: in example 4, the maximum output current is calculated as 476ma, however, the maximum output current can- not exceed 200ma. alternately, use figure 4 to quickly determine allow- able maximum output current for selected ambient temperatures. output capacitor selection and regulator stability for stable operation over the full temperature range and with load currents up to 200ma, use a 10? (min) output capacitor with an esr < 0.5 ? . to reduce noise and improve load-transient response, stability, and power-supply rejection, use larger output capacitor val- ues such as 22?. some ceramic dielectrics exhibit large capacitance and esr variations with temperature. for dielectric capacitors such as z5u and y5v, use 22? or more to ensure stability at temperatures below -10?. with x7r or x5r dielectrics, 10? should be sufficient at all oper- ating temperatures. for high-esr tantalum capacitors use 22? or more to maintain stability. to improve power-supply rejection and transient response, use a minimum 10? capacitor between in and gnd. i w vv ma i ma out max outmax () . ( ) = ? == 1 905 95 476 200 MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn _______________________________________________________________________________________ 9 MAX5084 fig04 v in (v) i out (ma) 55 45 35 25 15 50 100 150 200 250 300 0 565 v out = 5v t a +70 c t a = +85 c t a = +125 c figure 4. calculated maximum output current vs. input voltage chip information process: bicmos selector guide part temp range output voltage (v) MAX5084att+t -40? to +125? 5 or adjustable max5085att+t -40? to +125? 3.3 or adjustable
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn 10 ______________________________________________________________________________________ package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 6, 8, &10l, dfn thin.eps l c l c pin 1 index area d e l e l a e e2 n g 1 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm -drawing not to scale- k e [(n/2)-1] x e ref. pin 1 id 0.35x0.35 detail a b d2 a2 a1
MAX5084/max5085 65v, 200ma, low-quiescent-current linear regulators in tdfn maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 11 2006 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) common dimensions symbol min. max. a 0.70 0.80 d 2.90 3.10 e 2.90 3.10 a1 0.00 0.05 l 0.20 0.40 pkg. code n d2 e2 e jedec spec b [(n/2)-1] x e package variations 0.25 min. k a2 0.20 ref. 2.300.10 1.500.10 6 t633-1 0.95 bsc mo229 / weea 1.90 ref 0.400.05 1.95 ref 0.300.05 0.65 bsc 2.300.10 8 t833-1 2.00 ref 0.250.05 0.50 bsc 2.300.10 10 t1033-1 2.40 ref 0.200.05 - - - - 0.40 bsc 1.700.10 2.300.10 14 t1433-1 1.500.10 1.500.10 mo229 / weec mo229 / weed-3 0.40 bsc - - - - 0.200.05 2.40 ref t1433-2 14 2.300.10 1.700.10 t633-2 6 1.500.10 2.300.10 0.95 bsc mo229 / weea 0.400.05 1.90 ref t833-2 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref t833-3 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref -drawing not to scale- g 2 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm downbonds allowed no no no no yes no yes no

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