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general description the max6037 family of low-dropout, micropower volt- age references offer fixed and adjustable output volt- age options ranging from 1.184v to 5v. connect an external resistive-divider on the max6037_adj to adjust the output voltage from 1.184v to 5v. the other devices in the max6037 family feature fixed output volt- ages of 1.25v, 2.048v, 2.5v, 3.0v, 3.3v, and 4.096v. the max6037 offers shutdown functionality with an active-low shutdown (500na, max). these series-mode voltage references operate from a 2.5v to 5.5v supply and consume 275? (max) quies- cent current. the output is stable driving loads from 0.02? to 1? and can source and sink 5ma of load current. the max6037 offers a low temperature coeffi- cient of 25ppm/? and initial accuracy of ?.2% (max). the low dropout voltage (100mv, max at 1ma) and supply-independent, low supply current make the max6037 ideal for battery-powered applications. the max6037 is available in the miniature 5-pin sot23 package and is specified over the -40? to +125? automotive temperature range. applications medical equipment portable equipment wireless lan precision regulators features ? adjustable v out : 1.184v to 5v ? fixed outputs: 1.25v, 2.048v, 2.5v, 3.0v, 3.3v, and 4.096v ? shutdown current < 500na (max) ? 25ppm/? (max) temperature coefficient (a grade) ? ?.2% (max) initial accuracy (a grade) ? low 100mv (max) dropout voltage at 1ma load current ? 2.5v to 5.5v input voltage range ? 5ma sink and source current capability ? available in 5-pin sot23 package ? operates over the automotive temperature range: -40? to +125? max6037 low-power, fixed and adjustable reference with shutdown in sot23 ________________________________________________________________ maxim integrated products 1 ordering information/selector guide 19-3192; rev 1; 12/07 for pricing delivery, and ordering information please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information/selector guide continued at end of data sheet. typical operating circuit out *optional * in 2.5v to 5.5v input gnd shdn reference output 0.02 f to 1 f max6037 pin configuration appears at end of data sheet. part output voltage (v) initial accuracy % max tempco (ppm/?) pin-package pkg code top mark max6037aauk12+t 1.25 0.2 25 5 sot23-5 u5-2 aeiv max6037bauk12+t 1.25 0.3 50 5 sot23-5 u5-2 aeiw max6037cauk12+t 1.25 0.5 50 5 sot23-5 u5-2 aeix max6037aauk21+t 2.048 0.2 25 5 sot23-5 u5-2 aeiy max6037bauk21+t 2.048 0.3 50 5 sot23-5 u5-2 aeiz max6037cauk21+t 2.048 0.5 50 5 sot23-5 u5-2 aeja + denotes a lead-free package. t = tape and reel. note: all devices are specified over the -40? to +125? operating temperature range.
max6037 low-power, fixed and adjustable reference with shutdown in sot23 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics?ax6037_12 (v out = 1.25v) (v in = v shdn = +3v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (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, out, shdn , adj to gnd...................................-0.3v to +6v output short circuit to gnd or in............................. continuous continuous power dissipation (t a = +70?) 5-pin sot23 (derate 7.1mw/? above +70?)............571mw operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65 c to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units output max6037a_12 (0.2%) 1.2475 1.250 1.2525 max6037b_12 (0.3%) 1.2462 1.250 1.2538 output voltage v out t a = +25 c max6037c_12 (0.5%) 1.2438 1.250 1.2563 v max6037a_12 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_12 6 50 ppm/ c line regulation ? v out / ? v in 2.5v v in 5.5v 0.0006 0.0096 %/v sourcing: 0 i out 1ma 0.008 0.072 sourcing: 1ma i out 5ma 0.006 0.072 sinking: -1ma i out 0 0.025 0.12 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.014 0.12 %/ma short to gnd 16 out short-circuit current i sc short to in 32 ma thermal hysteresis (note 3) ? v out /cycle 485 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 6 ? p-p noise voltage e out f = 10hz to 1khz 15 ? rms initial power-up 360 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 3v, shdn pulled from low to high 75 ? output impedance when disabled z out v in = 3v, v shdn = 0v 125 k ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 2.5 5.5 v quiescent supply current i in 190 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na
max6037 low-power, fixed and adjustable reference with shutdown in sot23 _______________________________________________________________________________________ 3 electrical characteristics?ax6037_12 (v out = 1.25v) (continued) (v in = v shdn = +3v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units shutdown ( shdn ) logic-high input voltage v enh 2.5v v in 5.5v 2.0 v logic-low input voltage v enl 2.5v v in 5.5v 0.7 v logic-high input current i enh 2.5v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 2.5v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na electrical characteristics?ax6037_21 (v out = 2.048v) (v in = v shdn = +3v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_21 (0.2%) 2.0439 2.0480 2.0521 max6037b_21 (0.3%) 2.0418 2.0480 2.0542 output voltage v out t a = +25 c max6037c_21 (0.5%) 2.0378 2.0480 2.0582 v max6037a_21 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_21 6 50 ppm/ c line regulation ? v out / ? v in 2.5v v in 5.5v 0.0008 0.0107 %/v sourcing: 0 i out 1ma 0.006 0.044 sourcing: 1ma i out 5ma 0.004 0.044 sinking: -1ma i out 0 0.02 0.195 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.01 0.195 %/ma short to gnd 16 out short-circuit current i sc short to in 32 ma thermal hysteresis (note 3) ? v out /cycle 458 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 11 ? p-p noise voltage e out f = 10hz to 1khz 25 ? rms initial power-up 2.1 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 3v, shdn pulled from low to high 2 ms output impedance when disabled z out v in = 3v, v shdn = 0v 205 k ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 2.5 5.5 v quiescent supply current i in 190 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na
max6037 low-power, fixed and adjustable reference with shutdown in sot23 4 _______________________________________________________________________________________ electrical characteristics?ax6037_21 (v out = 2.048v) (continued) (v in = v shdn = +3v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units shutdown ( shdn ) logic-high input voltage v enh 2.5v v in 5.5v 2.0 v logic-low input voltage v enl 2.5v v in 5.5v 0.7 v logic-high input current i enh 2.5v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 2.5v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na electrical characteristics?ax6037_25 (v out = 2.500v) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_25 (0.2%) 2.4950 2.500 2.5050 max6037b_25 (0.3%) 2.4925 2.500 2.5075 output voltage v out t a = +25 c max6037c_25 (0.5%) 2.4875 2.500 2.5125 v max6037a_25 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_25 6 50 ppm/ c line regulation ? v out / ? v in (v out + 0.2v) v in 5.5v 0.0004 0.012 %/v sourcing: 0 i out 1ma 0.005 0.036 sourcing: 1ma i out 5ma 0.003 0.036 sinking: -1ma i out 0 0.02 0.2 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.01 0.2 %/ma short to gnd 33 out short-circuit current i sc short to in 32 ma i source = 1ma 40 100 dropout voltage (note 5) v in - v out i source = 5ma 190 410 mv thermal hysteresis (note 3) ? v out /cycle 514 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 14 ? p-p noise voltage e out f = 10hz to 1khz 30 ? rms initial power-up 2.2 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 5v, shdn pulled from low to high 2 ms output impedance when disabled z out v in = 5v, v shdn = 0v 250 k ? capacitive-load stability range (note 4) c out 0.02 1f
max6037 low-power, fixed and adjustable reference with shutdown in sot23 _______________________________________________________________________________________ 5 electrical characteristics?ax6037_30 (v out = 3.000v) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_30 (0.2%) 2.9940 3.000 3.0060 max6037b_30 (0.3%) 2.9910 3.000 3.0090 output voltage v out t a = +25 c max6037c_30 (0.5%) 2.9850 3.000 3.0150 v max6037a_30 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_30 6 50 ppm/ c line regulation ? v out / ? v in (v out + 0.2v) v in 5.5v 0.0004 0.0133 %/v sourcing: 0 i out 1ma 0.005 0.035 sourcing: 1ma i out 5ma 0.008 0.03 sinking: -1ma i out 0 0.02 0.2 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.01 0.2 %/ma short to gnd 33 out short-circuit current i sc short to in 32 ma i source = 1ma 40 100 dropout voltage (note 5) v in - v out i source = 5ma 190 410 mv thermal hysteresis (note 3) ? v out /cycle 501 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 17 ? p-p noise voltage e out f = 10hz to 1khz 40 ? rms initial power-up 2.4 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 5v, shdn pulled from low to high 2.1 ms electrical characteristics?ax6037_25 (v out = 2.500v) (continued) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units input supply voltage range v in guaranteed by line regulation test 2.7 5.5 v quiescent supply current i in 210 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na shutdown ( shdn ) logic-high input voltage v enh 2.7v v in 5.5v 2.0 v logic-low input voltage v enl 2.7v v in 5.5v 0.75 v logic-high input current i enh 2.7v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 2.7v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na
max6037 low-power, fixed and adjustable reference with shutdown in sot23 6 _______________________________________________________________________________________ electrical characteristics?ax6037_30 (v out = 3.000v) (continued) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output impedance when disabled z out v in = 5v, v shdn = 0v 300 k ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 3.2 5.5 v quiescent supply current i in 210 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na shutdown ( shdn ) logic-high input voltage v enh 3.2v v in 5.5v 2.0 v logic-low input voltage v enl 3.2v v in 5.5v 0.8 v logic-high input current i enh 3.2v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 3.2v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na electrical characteristics?ax6037_33 (v out = 3.300v) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_33 (0.2%) 3.2934 3.300 3.3066 max6037b_33 (0.3%) 3.2901 3.300 3.3099 output voltage v out t a = +25 c max6037c_33 (0.5%) 3.2855 3.300 3.3165 v max6037a_33 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_33 6 50 ppm/ c line regulation ? v out / ? v in (v out + 0.2v) v in 5.5v 0.0003 0.0133 %/v sourcing: 0 i out 1ma 0.005 0.027 sourcing: 1ma i out 5ma 0.002 0.027 sinking: -1ma i out 0 0.02 0.212 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.01 0.212 %/ma short to gnd 33 out short-circuit current i sc short to in 32 ma i source = 1ma 40 100 dropout voltage (note 5) v in - v out i source = 5ma 190 410 mv thermal hysteresis (note 3) ? v out /cycle 514 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm
max6037 low-power, fixed and adjustable reference with shutdown in sot23 _______________________________________________________________________________________ 7 electrical characteristics?ax6037_41 (v out = 4.096v) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_41 (0.2%) 4.0878 4.096 4.1042 max6037b_41 (0.3%) 4.0837 4.096 4.1083 output voltage v out t a = +25 c max6037c_41 (0.5%) 4.0755 4.096 4.1165 v max6037a_41 6 25 output-voltage temperature coefficient (note 2, 4) tcv out max6037b/c_41 6 50 ppm/ c line regulation ? v out / ? v in (v out + 0.2v) v in 5.5v 0.0003 0.0105 %/v sourcing: 0 i out 1ma 0.004 0.35 sourcing: 1ma i out 5ma 0.002 0.027 sinking: -1ma i out 0 0.02 0.212 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.01 0.212 %/ma electrical characteristics?ax6037_33 (v out = 3.300v) (continued) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units dynamic f = 0.1hz to 10hz 19 ? p-p noise voltage e out f = 10hz to 1khz 45 ? rms initial power-up 2.6 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 5v, shdn pulled from low to high 2.4 ms output impedance when disabled z out v in = 5v, v shdn = 0v 330 k ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 3.5 5.5 v quiescent supply current i in 210 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na shutdown ( shdn ) logic-high input voltage v enh 3.5v v in 5.5v 2.0 v logic-low input voltage v enl 3.5v v in 5.5v 0.8 v logic-high input current i enh 3.5v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 3.5v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na
max6037 low-power, fixed and adjustable reference with shutdown in sot23 8 _______________________________________________________________________________________ electrical characteristics?ax6037_41 (v out = 4.096v) (continued) (v in = v shdn = +5v, i out = 0, c out = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units short to gnd 33 out short-circuit current i sc short to in 32 ma i source = 1ma 40 100 dropout voltage (note 5) v in - v out i source = 5ma 190 410 mv thermal hysteresis (note 3) ? v out /cycle 524 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 24 ? p-p noise voltage e out f = 10hz to 1khz 50 ? rms initial power-up 3.2 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 5v, shdn pulled from low to high 3.2 ms output impedance when disabled z out v in = 5v, v shdn = 0 410 k ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 4.3 5.5 v quiescent supply current i in 210 275 ? shutdown supply current i shdn v shdn = 0v 0.05 500 na shutdown ( shdn ) logic-high input voltage v enh 4.3v v in 5.5v 2.0 v logic-low input voltage v enl 4.3v v in 5.5v 0.8 v logic-high input current i enh 4.3v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 4.3v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na
max6037 low-power, fixed and adjustable reference with shutdown in sot23 _______________________________________________________________________________________ 9 electrical characteristics?ax6037_adj (v out = 1.184v to 5v) (v in = v shdn = +5v, i out = 0, t a = t min to t max , adj shorted to out unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6037a_adj (0.2%) 1.1816 1.1840 1.1864 max6037b_adj (0.3%) 1.1805 1.1840 1.1875 initial output voltage (note 6) v out t a = +25 c max6037c_adj (0.5%) 1.1781 1.1840 1.1899 v output voltage range v out 1.184 v in - 0.15 v max6037a_adj 6 25 output-voltage temperature coefficient (notes 2, 4, 7) tcv out max6037b/c_adj 6 50 ppm/ c line regulation (note 8) ? v out / ? v in 2.5v v in 5.5v 0.0008 0.013 %/v sourcing: 0 i out 1ma 0.012 0.078 sourcing: 1ma i out 5ma 0.014 0.1 sinking: -1ma i out 0 0.005 0.12 load regulation ? v out / ? i out sinking: -5ma i out -1ma 0.005 0.12 %/ma short to gnd 33 out short-circuit current i sc short to in 32 ma i source = 1ma, v out = 5v 40 100 dropout voltage (notes 5, 9) v in - v out i source = 5ma, v out = 5v 190 410 mv thermal hysteresis (note 3) ? v out /cycle 421 ppm long-term stability ? v out /time 1000h at t a = +25 c 133 ppm dynamic f = 0.1hz to 10hz 6 ? p-p noise voltage (note 10) e out f = 10hz to 1khz 15 ? rms initial power-up 360 turn-on settling time t r to v out = 0.1% of final value, c out = 0.02? v in = 5v, shdn pulled from low to high 75 ? output impedance when disabled (note 11) z out v in = 5v, v shdn = 0v >10 m ? capacitive-load stability range (note 4) c out 0.02 1f input supply voltage range v in guaranteed by line regulation test 2.5 5.5 v quiescent supply current i in 200 250 ? shutdown supply current i shdn v shdn = 0v 0.15 500 na adj input bias current (note 4) i adj -50 0.5 +50 na
max6037_25 output voltage vs. temperature (v out = 2.500v) max6037 toc01 temperature ( c) output voltage (v) 100 75 -25 0 25 50 2.4925 2.4950 2.4975 2.5000 2.5025 2.5050 2.5075 2.5100 2.4900 -50 125 max6037_12 supply current vs. input voltage (v out = 1.25v) max6037 toc02 input voltage (v) supply current ( a) 5.0 4.5 4.0 3.5 3.0 180 190 200 210 220 230 170 2.5 5.5 t a = +125 c t a = +25 c t a = -40 c max6037_12 supply current vs. temperature (v out = 1.25v) max6037 toc03 temperature ( c) supply current ( a) 100 75 50 25 0 -25 175 200 225 250 150 -50 125 v in = +2.5v v in = +5.5v typical operating characteristics (v in = +3v for the max6037_12 and max6037_21; v in = +5v for the max6037_25, max6037_30, max6037_33, and max6037_41; i out = 0, c out = 0.1?, c in = 0.1?, t a = +25?, unless otherwise specified.) max6037 low-power, fixed and adjustable reference with shutdown in sot23 10 ______________________________________________________________________________________ note 1: all devices are 100% tested at t a = +25 c and are guaranteed by design for t a = t min to t max , as specified. note 2: temperature coefficient is measured by the ?ox?method, i.e., the maximum ? v out / v out is divided by the maximum ? t. note 3: thermal hysteresis is defined as the change in +25? output voltage before and after cycling the device from t max to t min . note 4: not production tested. guaranteed by design. note 5: dropout voltage is defined as the minimum differential voltage (v in - v out ) at which v out decreases by 1% from its origi- nal value at v in = +5.0v. note 6: v out initial accuracy for the max6037_adj is tested with adj shorted to out. actual accuracy will be affected by match- ing and the temperature coefficient of the external resistors used. use 1% resistors with low temperature coefficient for best overall accuracy. note 7: the temperature coefficient for the max6037_adj is specified for the case where adj is connected to out. for the case where an external resistive network is used to set the output voltage, actual change in reference output over temperature will be affected by the temperature coefficient and matching of the external resistors used. note 8: the minimum v in is the greater of +2.5v and (v out + 0.2v). note 9: v out set to +5v with an external resistive-divider. note 10: noise for the max6037_adj is specified for a +1.25v output. noise is proportional to v out and is greater for higher output voltages. in addition, external resistors used to set the output voltage can contribute to noise. parameter symbol conditions min typ max units shutdown ( shdn ) logic-high input voltage v enh 2.5v v in 5.5v 2.0 v logic-low input voltage v enl 2.5v v in 5.5v 0.7 v logic-high input current i enh 2.5v v in 5.5v, v shdn = v in -1000 0.15 +1000 na logic-low input current i enl 2.5v v in 5.5v, v shdn = 0v -1000 0.05 +1000 na electrical characteristics?ax6037_adj (v out = 1.184v to 5v) (continued) (v in = v shdn = +5v, i out = 0, t a = t min to t max , adj shorted to out unless otherwise noted. typical values are at t a = +25?.) (note 1)
max6037 low-power, fixed and adjustable reference with shutdown in sot23 ______________________________________________________________________________________ 11 max6037_25 dropout voltage vs. source current (v out = 2.500v) mac6037 toc04 source current (ma) dropout voltage (mv) 8 6 4 2 100 200 300 400 500 600 0 010 t a = +125 c t a = +25 c t a = -40 c max6037_12 load regulation (v out = 1.25v) max6037 toc05 output current (ma) output voltage change (mv) 5 0 -5 -1 0 1 2 3 4 -2 -10 10 t a = +125 c t a = +125 c t a = +25 c t a = -40 c t a = -40 c sinking current sourcing current max6037_41 load regulation (v out = 4.096v) max6037 toc06 output voltage change (mv) -2 -1 0 1 2 3 4 5 6 -3 output current (ma) 5 0 -5 -10 10 t a = +125 c t a = +125 c t a = +25 c t a = -40 c t a = -40 c sinking current sourcing current max6037_12 line regulation vs. temperature (v out = 1.25v) max6037 toc07 input voltage (v) output voltage change ( v) 5.0 4.5 4.0 3.5 3.0 -60 -40 -20 0 -80 2.5 5.5 t a = +125 c t a = +25 c t a = -40 c max6037_25 power-supply rejection ratio vs. frequency (v out = 2.500v) max6037 tpc08 frequency (khz) psrr (db) 100 10 1 0.1 0.01 -100 -80 -60 -40 -20 0 -120 0.001 1000 max6037_41 shutdown current vs. temperature (v out = 4.096v) max6037 toc09 temperature (c) shutdown current (na) 100 75 50 25 0 -25 0 0.5 1.0 1.5 2.0 2.5 3.0 -0.5 -50 125 max6037_12 line transient (v out = 1.25v) max6037 toc10 400 s/div v out ac-coupled 10mv/div +3v v in +3.3v c out = 0.1 f c in = 0 max6037_41 line transient (v out = 4.096v) max6037 toc11 400 s/div v out ac-coupled 10mv/div 5v v in 5.5v c out = 0.1 f c in = 0 max6037_12 load transient (v out = 1.25v) max6037 toc12 1ms/div v out ac-coupled 2mv/div -10 a i out +10 a c out = 1 f typical operating characteristics (continued) (v in = +3v for the max6037_12 and max6037_21; v in = +5v for the max6037_25, max6037_30, max6037_33, and max6037_41; i out = 0, c out = 0.1?, c in = 0.1?, t a = +25?, unless otherwise specified.)
max6037 low-power, fixed and adjustable reference with shutdown in sot23 12 ______________________________________________________________________________________ max6037_12 load transient (v out = 1.25v) max6037 toc13 400 s/div v out ac-coupled 2mv/div -10 a i out +10 a c out = 0.02 f max6037_12 load transient (v out = 1.25v) max6037 toc14 1ms/div v out ac-coupled 200mv/div -5ma i out +5ma c out = 1 f max6037_12 load transient (v out = 1.25v) max6037 toc15 1ms/div v out ac-coupled 200mv/div -5ma i out +5ma c out = 0.02 f max6037_41 load transient (v out = 4.096v) max6037 toc16 1ms/div v out ac-coupled 2mv/div -10 a i out +10 a c out = 1 f max6037_41 load transient (v out = 4.096v) max6037 toc17 1ms/div v out ac-coupled 5mv/div -10 a i out +10 a c out = 0.02 f max6037_41 load transient (v out = 4.096v) max6037 toc18 1ms/div v out ac-coupled 200mv/div -5ma i out +5ma c out = 1 f max6037_41 load transient (v out = 4.096v) max6037 toc19 1ms/div v out ac-coupled 200mv/div -5ma i out +5ma c out = 0.02 f max6037_12 turn-on transient (v out = 1.25v) max6037 toc20 40 s/div v out 500mv/div gnd gnd v in +3v +1.25v c out = 0.02 f max6037_41 turn-on transient (v out = 4.096v) max6037 toc21 400 s/div v out 2v/div gnd gnd v in +5v 4.096v c out = 0.02 f typical operating characteristics (continued) (v in = +3v for the max6037_12 and max6037_21; v in = +5v for the max6037_25, max6037_30, max6037_33, and max6037_41; i out = 0, c out = 0.1?, c in = 0.1?, t a = +25?, unless otherwise specified.)
max6037 low-power, fixed and adjustable reference with shutdown in sot23 ______________________________________________________________________________________ 13 max6037_12 shutdown transient (v out = 1.25v) max6037 toc22 2ms/div v out 500mv/div gnd gnd v shdn +3v 1.25v c out = 0.02 f max6037_12 exiting shutdown transient (v out = 1.25v) max6037 toc23 10 s/div v out 500mv/div gnd gnd v shdn +3v 1.25v c out = 0.02 f max6037_41 shutdown transient (v out = 4.096v) max6037 toc24 10ms/div v out 2v/div gnd gnd v shdn +5v +4.096v c out = 0.02 f max6037_41 exiting shutdown transient (v out = 4.096v) max6037 toc25 400 s/div v out 2v/div gnd gnd v shdn +5v +4.096v c out = 0.02 f typical operating characteristics (continued) (v in = +3v for the max6037_12 and max6037_21; v in = +5v for the max6037_25, max6037_30, max6037_33, and max6037_41; i out = 0, c out = 0.1?, c in = 0.1?, t a = +25?, unless otherwise specified.) max6037_25 long-term stability vs. time (v out = 2.500v) max6037 toc26 time (hours) v out (v) 800 600 200 400 2.4985 2.4990 2.4995 2.5000 2.5005 2.5010 2.5015 2.5020 2.4980 0 1000 two typical parts
max6037 low-power, fixed and adjustable reference with shutdown in sot23 14 ______________________________________________________________________________________ pin description pin name function i.c. internally connected. (all fixed output voltage options.) do not connect anything to this pin. 1 adj output voltage adjustment connection. connect a resistor-divider between out, adj and gnd to set the output voltage. (max6037_adj only). 2 gnd ground 3 shdn active-low shutdown input. pull shdn low to disable the device. connect shdn to in for normal operation. 4in supply voltage input. bypass with a 0.1? to 1? capacitor to gnd. 5 out reference-voltage output. connect an output capacitor to gnd in the 0.02? to 1? range. typical operating characteristics (continued) (v in = +3v for the max6037_12 and max6037_21; v in = +5v for the max6037_25, max6037_30, max6037_33, and max6037_41; i out = 0, c out = 0.1?, c in = 0.1?, t a = +25?, unless otherwise specified.) note 12: many of the max6037 family typical operating characteristics are extremely similar. the extremes of these characteristics are found in the max6037_12 (1.25v output) and the max6037_41 (4.096v output). the typical operating characteristics of the remainder of the max6037 family typically lie between those two extremes and can be estimated based on their output voltages. max6037_41 output noise (0.1hz to 10hz) max6037 toc27 1s/div v out 10 v/div v out = 4.096v max6037_12 output noise (0.1hz to 10hz) max6037 toc28 1s/div v out 2 v/div v out = 1.25v gnd in shdn ( ) max6037_aukadj. 1 5 out i.c. (adj) max6037 sot23 + top view 2 34 pin configuration
detailed description the max6037 is a family of low-dropout, micropower voltage references. these devices all feature a shut- down mode by forcing shdn low, dropping the quies- cent current to less than 500na. the max6037 can sink and source up to 5ma with less than 410mv of dropout voltage, making them attractive for use in low-voltage applications. the max6037 is available in six fixed out- put voltages of 1.25v, 2.048v, 2.5v, 3.0v, 3.3v and 4.096v, and an adjustable output version for voltages between the range of 1.184v and 5v. shutdown the max6037 features an active-low shutdown mode. pulling shdn low disables the output and forces the quiescent current to less than 500na (typically 50pa). connect shdn to in for normal operation. max6037_adj adjustable output voltage set the output voltage on the max6037_adj by placing a resistor-divider network between out, adj, and gnd (see figure 1). use the following formula to calculate the output voltage: where v adj = 1.184v. set r2 = 1m ? or less. currents through resistor r1 and r2 add to the quiescent supply current. supply current the quiescent supply current of the series-mode max6037 family is typically 190? to 210?. when the supply voltage is below the minimum-specified input voltage during turn-on, the device can draw up to 250? beyond the nominal supply current. the input voltage source must be capable of providing this cur- rent to ensure reliable turn-on. thermal hysteresis output voltage hysteresis is the change of output volt- age at t a = +25? before and after the device is cycled over its entire operating temperature range. the typical thermal hysteresis value is 500ppm. v r r v out adj =+ ? ? ? ? ? ? 1 1 2 max6037 low-power, fixed and adjustable reference with shutdown in sot23 ______________________________________________________________________________________ 15 out r2 adj * optional * in 2.5v to 5.5v input gnd shdn r1 reference output 0.02 f to 1 f max6037_adj figure 1. max6037_adj typical operating circuit temperature coefficient (ppm/ c) 110 100 16-bit 14-bit 12-bit 10-bit 8-bit 0.01 0.1 10 100 1000 1 10,000 18-bit 20-bit operating temperature range (t max - t min ) ( c) figure 2. temperature coefficient vs. operating temperature range for a 1 lsb maximum error
max6037 low-power, fixed and adjustable reference with shutdown in sot23 16 ______________________________________________________________________________________ chip information transistor count: 372 process: bicmos turn-on time these devices typically turn on and settle to within 0.1% of their final value in 360? to 3.2ms, depending on the device. the turn-on time can increase up to 10ms with the device operating at the minimum dropout voltage and the maximum capacitive load. applications information input bypassing for the best transient performance, decouple the input with a 0.1? to 1? ceramic capacitor as shown in the typical operating circuit . locate the capacitor as close to in as possible. no capacitor is necessary if transient performance is less important. output/load capacitance devices in the max6037 family require an output capaci- tance in the range of 0.02? to 1? for frequency stability. temperature coefficient vs. operating temperature range for a 1 lsb maximum error in a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit throughout the operating temperature range. figure 2 shows the maximum allowable reference volt- age temperature coefficient to keep the conversion error to less than 1 lsb, as a function of the operating temperature range (t max - t min ) with the converter resolution as a parameter. the graph assumes the ref- erence voltage temperature coefficient as the only parameter affecting accuracy. in reality, the absolute static accuracy of a data con- verter is dependent on the combination of many para- meters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltage reference changes. part output voltage (v) initial accuracy % max tempco (ppm/?) pin-package pkg code top mark max6037aauk25+t 2.5 0.2 25 5 sot23-5 u5-2 aejb max6037bauk25+t 2.5 0.3 50 5 sot23-5 u5-2 aejc max6037cauk25+t 2.5 0.5 50 5 sot23-5 u5-2 aejd max6037aauk30+t 3.0 0.2 25 5 sot23-5 u5-2 aeje max6037bauk30+t 3.0 0.3 50 5 sot23-5 u5-2 aejf max6037cauk30+t 3.0 0.5 50 5 sot23-5 u5-2 aejg max6037aauk33+t 3.3 0.2 25 5 sot23-5 u5-2 aejh max6037bauk33+t 3.3 0.3 50 5 sot23-5 u5-2 aeji max6037cauk33+t 3.3 0.5 50 5 sot23-5 u5-2 aejj max6037aauk41+t 4.096 0.2 25 5 sot23-5 u5-2 aejk max6037bauk41+t 4.096 0.3 50 5 sot23-5 u5-2 aejl max6037cauk41+t 4.096 0.5 50 5 sot23-5 u5-2 aejm max6037aaukadj+t** 1.184 to 5, adjustable 0.2 25 5 sot23-5 u5-2 aeis max6037baukadj+t** 1.184 to 5, adjustable 0.3 50 5 sot23-5 u5-2 aeit max6037caukadj+t** 1.184 to 5, adjustable 0.5 50 5 sot23-5 u5-2 aeiu ordering information/selector guide (continued) ** the accuracy of the max6037_adj is dependent on the accuracy of the external resistors. use 1% resistors with low temperature coefficient for best overall accuracy. + denotes a lead-free package. t = tape and reel. note: all devices are specified over the -40? to +125? operating temperature range.
max6037 low-power, fixed and adjustable reference with shutdown in sot23 ______________________________________________________________________________________ 17 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 .) sot-23 5l .eps
max6037 low-power, fixed and adjustable reference with shutdown in sot23 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. 18 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 2/04 initial release 1 12/07 updating selector table 1?, 9, 16

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