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general description the max5086 high-voltage linear regulator operates from a 6.5v to 65v input voltage and delivers up to a 250ma output current. the device consumes only 70? of quiescent current with no load and 13? in shut- down. the device includes a set input, that when con- nected to ground, selects a preset output voltage of 3.3v (max5086a) or 5.0v (max5086b). alternatively, the output voltage can be adjusted from 2.5v to 11v by simply connecting set to the regulator? output through a resistive divider network. the max5086 also provides an open-drain, active-low microprocessor reset output that asserts when the regulator output drops below the preset output voltage threshold. an external capacitor programs the reset timeout period. other features include an enable input, thermal shutdown, and short- circuit protection. the max5086 operates over the automotive tempera- ture range of -40? to +125? and is available in a 16-pin or a 56-pin tqfn thermally enhanced package. applications automotive industrial home security/safety networking features wide operating input voltage range (6.5v to 65v) thermally enhanced package dissipates 2.6w at t a = +70? (16-pin tqfn) 3.8w at t a = +70? (56-pin tqfn) guaranteed 250ma output current 70? quiescent supply current preset 3.3v, 5.0v, or adjustable 2.5v to 11v output voltage remote load sense integrated microprocessor reset circuit with programmable timeout period thermal and short-circuit protection -40? to +125? operating temperature range max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay ________________________________________________________________ maxim integrated products 1 12 + 11 10 9 5 6 7 8 out out outsense gnd top view 16 15 14 13 n.c. n.c. n.c. n.c. 1234 en n.c. in in max5086 n.c. ct reset set tqfn 32 33 34 35 36 29 30 31 37 15 16 17 18 19 20 21 22 23 24 n.c. n.c. n.c. tqfn n.c. n.c. n.c. n.c. n.c. ct reset set n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. en n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. 25 n.c. n.c. n.c. n.c. out out outsense n.c. in in gnd n.c. n.c. n.c. n.c. 38 n.c. 39 40 41 n.c. n.c. n.c. 42 n.c. 6 5 4 3 210 9 8 7 112 11 14 13 26 27 28 53 52 51 50 49 48 47 46 45 44 56 55 54 43 max5086 + pin configurations ordering information 19-3878; rev 1; 7/06 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. note: all devices specified over the -40? to +125? operating temperature range. + denotes lead-free package. * ep = exposed paddle. evaluation kit available part pin-package output voltage (v) pkg code max5086aate+ 16 tqfn-ep* 3.3 t1655-2 max5086aate 16 tqfn-ep* 3.3 t1655-2 max5086aatn+ 56 tqfn-ep* 3.3 t5688-3 max5086aatn 56 tqfn-ep* 3.3 t5688-3 ordering information continued at end of data sheet.
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = 14v, i out = 1ma, c in = 10f, c out = 15f, v en = 2.4v, 10k ? from reset to out, t a = t j = -40 c to +125 c, unless other- wise noted. typical specifications are at t a = +25 c.) (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 (do not exceed package power dissipation)................................-0.3v to +70v in to gnd (t 300ms, i out 250ma) ..................-0.3v to +42v en to gnd..............................................................-0.3v to +70v ct, reset , set, out, outsense to gnd ..........-0.3v to +12v in to out................................................................-0.3v to +70v short-circuit duration (v in < 16v) .............................continuous maximum current into any pin (except in, out).............20ma continuous power dissipation (t a = +70 c) 16-pin tqfn (derate 33.3mw/ c above +70 c) .......2666mw 56-pin tqfn (derate 47.6mw/ c above +70 c) .......3809mw thermal resistance: ( ja , 16-pin tqfn)....................................................30.0 c/w ( jc , 16-pin tqfn)......................................................1.7 c/w ( ja , 56-pin tqfn)....................................................21.0 c/w ( jc , 56-pin tqfn)......................................................0.6 c/w operating temperature range .........................-40 c to +125 c junction temperature ......................................................+150 c storage temperature range .............................-60 c to +150 c lead temperature (soldering, 10s) .................................+300 c 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 70 115 supply current i q measured at gnd, set = gnd i out = 250ma 1250 a shutdown supply current i shdn v en 0.4v 13 21 a regulator guaranteed output current i out v in = 6.5v, v out = 5.0v 250 ma 6.5v v in 25v, 5ma i out 250ma 4.85 5 5.15 set = gnd, 5v version 6.5v v in 65v, 5ma i out 100ma 4.85 5 5.15 6.5v v in 25v, 5ma i out 250ma 3.217 3.3 3.392 set = gnd, 3.3v version 6.5v v in 65v, 5ma i out 100ma 3.217 3.3 3.392 output voltage (note 2) v out i out = 5ma, adjustable range 2.5 11.0 v dropout voltage (note 3) ? v do i out = 250ma, v out = 5v 0.9 2.2 v startup response time (note 4) rising edge of v in to v out , r l = 500 ? , set = gnd 400 s 5v version -1 +1 line regulation ? v out / ? v in 6.5v v in 65v 3.3v version -0.5 +0.8 mv/v v en = high, regulator on 2.4 enable voltage v en v en = low, regulator off 0.4 v
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay _______________________________________________________________________________________ 3 note 1: limits at -40 c are guaranteed by design. note 2: output voltage is tested using a pulsed load current of less than 50ms duration. note 3: dropout voltage is defined as (v in - v out ) when v out is 100mv below the value of v out for v in = v out + 3v. note 4: startup time measured from 50% of v in to 90% of v out . note 5: continuous short-circuit protection for v in > 16v not guaranteed. electrical characteristics (continued) (v in = 14v, i out = 1ma, c in = 10f, c out = 15f, v en = 2.4v, 10k ? from reset to out, t a = t j = -40 c to +125 c, unless other- wise noted. typical specifications are at t a = +25 c.) (note 1) parameter symbol conditions min typ max units v en = 2.4v 0.38 enable input current i en v en = 14v 3.75 a set reference voltage v set 1.20 1.235 1.26 v set input leakage current i set -100 -1.5 100 na load regulation ? v out / ? i out i out = 1ma to 250ma 0.045 0.4 ? power-supply rejection ratio psrr i out = 10ma, f = 100hz, 500mv p-p , v out = 5v -54 db short-circuit current (note 5) i sc v in < 16v 440 ma thermal shutdown temperature t j ( shdn ) 175 c thermal shutdown hysteresis ? t j ( shdn ) 25 c reset voltage threshold v reset 89.91 92 94.10 % v out reset threshold hysteresis v rhyst 2 % v out reset output low voltage v rl i sink = 1ma 0.4 v reset output leakage current i rh v reset = 5v 1 a reset output minimum timeout period when v out reaches reset threshold, c ct = open 15 s enable to reset minimum timeout period when en goes high, c ct = open 169 s delay comparator threshold (rising) 1.196 1.23 1.264 v delay comparator threshold hysteresis 100 mv ct charge current 1 2.26 4a ct discharge current 5ma
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 4 _______________________________________________________________________________________ typical operating characteristics (v in = v en = 14v, c in = 10f, c out = 15f, v out = 5v, set = gnd, t a = +25 c, unless otherwise specified.) output voltage vs. input voltage max5086 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 supply current vs. temperature max5086 toc02 temperature ( c) i gnd ( a) 110 95 -25 -10 5 35 50 65 20 80 20 40 60 80 100 120 140 160 0 -40 125 v in = +65v v in = +6.5v v in = +14v shutdown supply current vs. temperature max5086 toc03 temperature ( c) i shdn ( a) 125 110 80 95 -10 5 20 35 50 65 -25 2 4 6 8 10 12 14 16 18 20 0 -40 140 output voltage vs. temperature max5086 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 = 5ma ground current vs. temperature max5086 toc05 temperature ( c) i gnd (ma) 125 110 95 80 65 50 35 20 5 -10 -25 0.5 1.0 1.5 2.0 2.5 3.0 0 -40 140 v in = +6.5v i out = 50ma i out = 100ma i out = 250ma output voltage vs. load current and temperature max5086 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 v in = +6.5v i out = 100ma i out = 50ma i out = 250ma dropout voltage vs. load current max5086 toc07 i out (ma) v dropout (v) 225 200 150 175 50 75 100 125 25 0.15 0.30 0.45 0.60 0.75 0.90 1.05 1.20 1.35 1.50 0 0250 v out = +5v power-supply rejection ratio vs. frequency max5086 toc08 frequency (khz) psrr (db) 100 10 1 -70 -60 -50 -40 -30 -20 -10 0 -80 0.1 1000 c out = 15 f i out = 10ma load-transient response max5086 toc09 400 s/div v out 200mv/div i out 250ma 5ma
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay _______________________________________________________________________________________ 5 input voltage step response max5086 toc10 400 s/div v out ac-coupled 500mv/div 26v 0v 0v 6.5v 0v v in 10v/div i out = 50ma startup response max5086 toc11 400 s/div v out 2v/div v in 10v/div i out = 5ma 0v 0v enable startup response max5086 toc12 100 s/div en 1v/div v out 2v/div v in = 14v i out = 0 0v 0v enable startup response max5086 toc13 100 s/div en 1v/div v out 2v/div v in = 14v i out = 250ma 0v 0v enable startup response max5086 toc14 100 s/div en 1v/div v out 2v/div v in = 65v i out = 0 0v 0v enable startup response max5086 toc15 100 s/div en 1v/div v out 2v/div v in = 65v i out = 250ma 0v 0v shutdown response max5086 toc16 20ms/div en 1v/div v out 2v/div i out = 5ma 0v 0v ground current distribution (t a = -40 c) max5086 toc17 i gnd ( a) number of units 74 73 65 66 67 69 70 71 68 72 5 10 15 20 25 30 35 40 0 64 138 units tested ground current distribution (t a = +125 c) max5086 toc18 i gnd ( a) number of units 74 73 65 66 67 69 70 71 68 72 5 10 15 20 25 30 35 40 0 138 units tested typical operating characteristics (continued) (v in = v en = 14v, c in = 10f, c out = 15f, v out = 5v, set = gnd, t a = +25 c, unless otherwise specified.)
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 6 _______________________________________________________________________________________ pin description pin 16-pin tqfn 56-pin tqfn name function 1, 12 16 1 13, 15, 18, 19, 20, 25 28, 32 56 n.c. no connection. not internally connected. 214en enable input. drive en high to turn on the regulator. force en low to place the device in shutdown mode. 3, 4 16, 17 in regulator input. supply voltage ranges from 6.5v to 65v. bypass in to gnd with a 10f capacitor. 5, 6 21, 22 out regulator output. connect at least a 15f low-esr capacitor from out to gnd. 723 outsense regulator output feedback point. outsense must be connected to out for fixed output voltage versions. leave outsense open circuit for adjustable output voltage version. 8 24 gnd ground 9 29 set feed b ack reg ul ati on s et p oi nt. c onnect s e t to gn d for a fi xed 3.3v outp ut ( m ax 5086a) or 5.0v outp ut ( m ax 5086b) . c onnect an exter nal r esi sti ve d i vi d er netw or k fr om ou ts e n s e to s e t to gn d to ad j ust the outp ut vol tag e fr om 2.5v to 11v . 10 30 reset open-drain active-low reset output. connect a 10k ? pullup resistor from reset to any supply voltage up to 11v to create a logic output. 11 31 ct reset timeout setting connection. a 2a charging current is available at ct. connect a capacitor from ct to gnd to set the reset timeout period (see the adjustable reset timeout period (ct) section). ep ep ep exposed pad. connect externally to a large ground plane to aid heat dissipation. do not use ep as the only ground connection.
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay _______________________________________________________________________________________ 7 max5086 error amplifier en in out set ct reset gnd outsense control logic, thermal shutdown, and overcurrent protection mux 2 a delay comparator ct comparator 0.92 x v ref v ref internal supply voltage figure 1. functional diagram
detailed description the max5086 high-voltage linear regulator includes an integrated microprocessor reset circuit with an adjustable reset timeout period (see the adjustable reset timeout period (ct) section). the device guaran- tees a 250ma load current and is available with a pre- set output voltage of 3.3v (max5086a) or 5v (max5086b). both devices can be configured to pro- vide an adjustable output voltage from 2.5v to 11v. the internal reset circuit monitors the regulator output volt- age and asserts reset low when the regulator output falls below the reset threshold voltage. other features include an enable (regulator control input), 21a (max) shutdown current, short-circuit protection (see the output short-circuit current limit section), and thermal shutdown (see the thermal protection section). regulator the max5086 accepts an input voltage range from 6.5v to 65v and offers a fixed output voltage of 3.3v or 5v. for an adjustable output voltage operation, use an external resistive divider network connected between out, set, and gnd (see figure 2). enable input (en) en is a logic-level enable input that turns on/off the device. drive en high to turn on the device and drive en low to place the device in shutdown. the max5086 draws 13a (typ) of supply current when in shutdown. en withstands voltages up to +65v, allowing en to be connected to in for an always-on operation. remote sensing (outsense) for fixed output voltage versions, outsense must be used for load voltage sensing. leave outsense open circuit when using adjustable output voltage version. reset output ( reset ) a supervisor circuit is fully integrated in the max5086 and uses the same reference voltage as the regulator. reset goes low if v out drops below the preset output voltage threshold, and remains low at least for the time- out period after v out rises above the reset voltage threshold. adjustable reset timeout period (ct) the max5086 features a user-adjustable reset timeout. connect a capacitor from ct to gnd to set the reset timeout period (see figure 2) and use the following equation to calculate the timeout period: t rp = c ct x 0.6175 x 10 6 where c ct is the value of the external capacitor con- nected from ct to gnd and t rp is in seconds. thermal protection when the junction temperature exceeds t j = 175 c an internal thermal sensor signals the shutdown logic, which turns off the pass transistor, allowing the ic to cool. the thermal sensor turns the pass transistor on again after the ic s junction temperature cools by 25 c, resulting in a cycled output during continuous thermal- overload conditions. thermal protection protects the max5086 in the event of fault conditions. during contin- uous operation, do not exceed the absolute maximum junction temperature rating of t j = +150 c. output short-circuit current limit the max5086 features a current limit. the output can be shorted to gnd for an indefinite period of time (for v in < 16v) without damage to the device. max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 8 _______________________________________________________________________________________ 6.5v to 65v 2.5v to 11v 10 f c ct 15 f out on off outsense set in r1 r2 v out = v set (1 + r1/r2) v set = 1.23v en reset ct gnd max5086 r3 to p figure 2. setting the adjustable output voltage
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay _______________________________________________________________________________________ 9 applications information output voltage selection the max5086 features dual-mode operation, in either a preset voltage mode or an adjustable mode. in preset voltage mode, internal feedback resistors set the max5086 s output voltage to +3.3v or +5v. select pre- set voltage mode by connecting set to ground. in adjustable mode, select an output between +2.5v and +11v using two external resistors connected as a volt- age-divider to set (figure 2). set the output voltage using the following equation: where v set = 1.23v and r2 is chosen to be approxi- mately 100k ? . available output current calculation the max5086 high-voltage regulator provides up to 250ma of output current. the input voltage extends to +65v. package power dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. figure 3 depicts the maxi- mum power dissipation curve for these devices. the graph assumes that the exposed pad of the max5086 package is set up per jedec specifications. use figure 3 to determine the allowable package dissi- pation (p d ) for a given ambient temperature. alternately, use the following formulas to calculate the allowable package dissipation: for the 56-pin tqfn package: for the 16-pin tqfn package: 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 ic ground current. example 1: mAX5086BATN t a = +105 c v in = +14v v out = +5v find the maximum allowable output current. first calcu- late package dissipation at the given temperature as follows: then determine the maximum output current: i (2.143w) (14v) (5v) 238ma out(max) = ? = p 3.809w 0.0476 w c (105 c 70 c) 2.143w d =? ? = i p vv 250ma out(max) d in out ? ? p w for t c w w c xt c for c t c d a a a . . . ( ) = + ? ? +< + ? ? ? ? ? ? ? ? ? ? ? ? ? ? 2 666 70 2 666 0 0333 70 70 125 p w for t c w w c xt c for c t c d a a a . . . ( ) = + ? ? +< + ? ? ? ? ? ? ? ? ? ? ? ? ? ? 3 809 70 3 809 0 0476 70 70 125 vvx r r out set =+ ? ? ? ? ? ? 1 1 2 max5087 fig03 temperature ( c) p d (w) 120 20 60 80 100 40 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 0140 3.809w (56-pin tqfn) 2.666w (16-pin tqfn) derate 47.6mw/ c derate 33.3mw/ c figure 3. calculated maximum power dissipation vs. temperature
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 10 ______________________________________________________________________________________ example 2: max5086aatn t a = +125 c v in = +14v v out = +3.3v calculate package dissipation at the given temperature as follows: and establish the maximum current: example 3: mAX5086BATN t a = +50 c v in = +14v v out = +5v calculate package dissipation at the given temperature as follows: p d = 3.809w and find the maximum output current: in example 3, the maximum output current is calculated as 423ma, however, the maximum output current can- not exceed 250ma. use figures 4a and 4b to quickly determine maximum allowable output current for selected ambient temper- atures. output capacitor selection and regulator stability for stable operation over the full temperature range and with load currents up to 250ma, use a 15f (min) output capacitor with an esr < 0.25 ? . to reduce noise and improve load-transient response, stability, and power-supply rejection, use larger output capacitor val- ues such as 22f. some ceramic capacitor dielectrics exhibit large capacitance and esr variation with temperature. for capacitor dielectrics such as y5v, use 22f or more to ensure stability at temperatures below -10 c. with x7r or x5r dielectrics, 15f should be sufficient at all operating temperatures. to improve power supply rejection and transient response, use a minimum 10f capacitor from in to gnd. i (3.809w) (14v) (5v) ma i 250ma out(max) out(max) . = ? =? = 423 2 i (1.191w) (14v) (3.3v) ma out(max) . = ? = 111 3 p 3.809w 0.0476 w c (125 c 70 c) 1 w d . =? ? = 191 maximum output current vs. input voltage max5086 fig04a v in (v) i out(max) (a) 60 55 50 45 40 35 30 25 20 15 10 5 0.05 0.10 0.15 0.20 0.25 0.30 0 065 v out = 5v (56-pin tqfn) t a = +70 c t a = +85 c t a = +125 c figure 4a. maximum output current vs. input voltage (56-pin tqfn) maximum output current vs. input voltage max5086 fig04b v in (v) i out(max) (a) 60 55 50 45 40 35 30 25 20 15 10 5 0.05 0.10 0.15 0.20 0.25 0.30 0 065 v out = 5v (16-pin tqfn) t a = +70 c t a = +85 c t a = +125 c figure 4b. maximum output current vs. input voltage (16-pin tqfn)
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay ______________________________________________________________________________________ 11 chip information transistor count: 1386 process: bicmos ordering information (continued) note: all devices specified over the -40 c to +125 c operating temperature range. + denotes lead-free package. * ep = exposed paddle. part pin-package output voltage (v) pkg code max5086bate+ 16 tqfn-ep* 5.0 t1655-2 max5086bate 16 tqfn-ep* 5.0 t1655-2 mAX5086BATN+ 56 tqfn-ep* 5.0 t5688-3 mAX5086BATN 56 tqfn-ep* 5.0 t5688-3
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 12 ______________________________________________________________________________________ qfn thin.eps 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 .)
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay ______________________________________________________________________________________ 13 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 .)
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 14 ______________________________________________________________________________________ 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 .) package outline 21-0135 2 1 e 56l thin qfn, 8x8x0.8mm
max5086 65v, 250ma, low-quiescent-current linear regulator with adjustable reset delay 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 ____________________ 15 ? 2006 maxim integrated products 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 .) package outline 21-0135 2 2 e 56l thin qfn, 8x8x0.8mm revision history pages changed at rev 1: 2, 15

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