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1 micropower voltage reference isl21010 the isl21010 is a precision, low dropout micropower bandgap voltage reference in a space-saving sot-23 package. it operates from a single 2.2v to 5.5v supply (minimum voltage is dependent on voltage option) a nd provides a 0.2% accurate reference. the isl21010 provides up to 25ma output current sourcing with low 150mv dropout voltage. output voltage options include 1.024v, 1.2v, 1.5v, 2.048v, 2.5v, 3.0v, 3.3v and 4.096v. the low supply current and low dropout voltage combined with high accuracy make the isl21010 ideal for precision battery powered applications. applications ? battery management/monitoring ? low power standby voltages ?portable instrumentation ? consumer/medical electronics ? lower cost industrial and instrumentation ?power regulation circuits ? control loops and compensation networks ? led/diode supply features ? reference output voltages . . . . . . . . . . . 1.024v, 1.25v, 1.5v, 2.048v, 2.5v, 3.0v, 3.3v, 4.096v ? precision 0.2% initial accuracy ? input voltage range: - isl21010-10, -12, -15 (coming soon) . . . . . . 2.2v to 5.5v - isl21010-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2v to 5.5v - isl21010-25 (coming soon) . . . . . . . . . . . . . . 2.6v to 5.5v - isl21010-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1v to 5.5v - isl21010-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4v to 5.5v - isl21010-40 (coming soon) . . . . . . . . . . . . . . 4.2v to 5.5v ? output current source capability . . . . . . . . . . . . . . . . . 25ma ? operating temperature range. . . . . . . . . . .-40c to +125c ? output voltage noise (v out = 2.048v) . . . . . . . . . . . . . 58v p-p (0.1hz to 10hz) ? supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48a (typ) ? tempco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50ppm/c ? package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ld sot-23 ? pb-free (rohs compliant) figure 1. typical application diagram cb 1f cl +5.0v signal input 0 ? 5v +5.0v +5.0v isl28134 r1 c1 4.7nf adc +ain1 -ain1 gnd vdd vref vin vout gnd isl21010 50 ? 0.1f - 10f august 9, 2011 fn7896.0 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas inc. 2011. all rights reserved intersil (and design) is a trademark owned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners.
isl21010 2 fn7896.0 august 9, 2011 pin configuration isl21010 (3 ld sot-23) top view 1 2 3 v out gnd v in pin descriptions pin number pin name description 1v in input voltage connection 2v out voltage reference output 3gndground connection ordering information part number (notes 1, 2, 3, 4) part marking v out option (v) initial accuracy (%) temp. range (c) package tape & reel (pb-free) pkg. dwg. # isl21010cfh320z-tk bdsa 2.048 0.2 -40 to +125 3 ld sot-23 p3.064 ISL21010CFH330Z-TK bdva 3.0 0.2 -40 to +125 3 ld sot-23 p3.064 isl21010cfh333z-tk bdwa 3.3 0.2 -40 to +125 3 ld sot-23 p3.064 notes: 1. please refer to tb347 for details on reel specifications. 2. these intersil pb-free plastic packaged products employ spec ial pb-free material sets, molding compounds/die attach materials , and 100% matte tin plate plus anneal (e3 termination finish , which is rohs compliant and compatible wi th both snpb and pb-free soldering opera tions). intersil pb-free products are msl classified at pb-fr ee peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jed ec j std-020. 3. for moisture sensitivity level (msl), please see device information page for isl21010 . for more information on msl please see tech brief tb363 . 4. the part marking is located on the bottom of the part.
isl21010 3 fn7896.0 august 9, 2011 table of contents pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 thermal information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 electrical specifications (isl21010-20, v out = 2.048v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 electrical specifications (isl21010-30, v out = 3.0v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 electrical specifications (isl21010-33, v out = 3.3v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 typical performance char acteristics curves (v out = 2.048v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 typical performance char acteristics curves (v out = 3.0v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 typical performance char acteristics curves (v out = 3.3v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 micropower operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 board mounting considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 board assembly considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 noise performance and reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 package outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
isl21010 4 fn7896.0 august 9, 2011 absolute maximum rating s thermal information max voltage v in to gnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to +6.5v v out (pin) to gnd (10s) . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to v in +0.5v input voltage slew rate (max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1v/s temperature range (industrial) . . . . . . . . . . . . . . . . . . . . .-40c to +125c esd rating human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5500v machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300v charged device model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kv thermal resistance (typical) . . . . . . . . . . . . . . . . . ja (c/w) ..... jc (c/w) 3 ld sot-23 package (notes 5, 6). . . . . . . . . . . . . . . . . 275 ................. 110 continuous power dissipation (t a = +125c) . . . . . . . . . . . . . . . . . . 99mw storage temperature range. . . . . . . . . . . . . . . . . . . . . . . .-65c to +150c pb-free reflow profile (note 7). . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/ pbfree/pb-freereflow.asp recommended operating conditions temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40c to +125c supply voltage v out = 2.048v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2v to 5.5v v out = 3.0v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1v to 5.5v v out = 3.3v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4v to 5.5v caution: do not operate at or near the maximum ratings listed for extended periods of time. exposure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. notes: 5. ja is measured with the component mounted on a high effective th ermal conductivity test board in free air. see tech brief tb379 for details. 6. for jc , the ?case temp? location is taken at the package top center. 7. post-reflow drift for the isl21010 devices may shift up to 4.0m v based on simulated reflow at 260c peak temperature, three p asses. the system design engineer must take this into account when considering the reference voltage after assembly. electrical specifications (isl21010-20, v out = 2.048v) v in = 3.0v, t a = +25c, i out = 0a, unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. parameter description conditions min (note 8) typ max (note 8) unit v out output voltage 2.048 v v oa v out accuracy @ t a = +25c (note 7) -0.2 +0.2 % tc v out output voltage temperature coefficient (note 9) 15 50 ppm/c v in input voltage range 2.2 5.5 v i in supply current t a = +25c 46 80 a t a = -40c to +125c 100 a v out / v in line regulation 2.2 v < v in < 5.5v 37 130 v/v v out / i out load regulation sourcing: 0ma i out 25ma 18 110 v/ma sinking: -1ma i out 0ma 10 v/ma i sc short circuit current t a = +25c, v out tied to gnd 118 ma t r turn-on settling time v out = 0.1%, c out = 1 f 300 s ripple rejection f = 120hz 66 db e n output voltage noise 0.1hz f 10hz 58 v p-p v n broadband voltage noise 10hz f 1khz 26 v rms v out / t a thermal hysteresis (note 11) t a = +165c 50 ppm v out / t long term stability 1000 hours, t a = +25c 50 ppm electrical specifications (isl21010-30, v out = 3.0v) v in = 5.0v, t a = +25c, i out = 0a, unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. parameter description conditions min (note 8) typ max (note 8) unit v out output voltage 3.0 v v oa v out accuracy @ t a = +25c (note 7) -0.2 +0.2 % tc v out output voltage temperature coefficient (note 9) 15 50 ppm/c v in input voltage range 3.1 5.5 v
isl21010 5 fn7896.0 august 9, 2011 i in supply current t a = +25c 48 80 a t a = -40c to +125c 100 a v out / v in line regulation 3.1 v < v in < 5.5v 73 230 v/v v out / i out load regulation sourcing: 0ma i out 25ma 48 110 v/ma sinking: -1ma i out 0ma 10 v/ma v indo dropout voltage (note 10) i out = 10ma 60 150 mv i sc short circuit current t a = +25c, v out tied to gnd 126 ma t r turn-on settling time v out = 0.1%, c out =1 f 300 s ripple rejection f = 120hz 62 db e n output voltage noise 0.1hz f 10hz 86 v p-p v n broadband voltage noise 10hz f 1khz 36 v rms v out / t a thermal hysteresis (note 11) t a = +165c 50 ppm v out / t long term stability 1000 hours, t a = +25c 50 ppm electrical specifications (isl21010-30, v out = 3.0v) v in = 5.0v, t a = +25c, i out = 0a, unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. (continued) parameter description conditions min (note 8) typ max (note 8) unit electrical specifications (isl21010-33, v out = 3.3v) v in = 5.0v, t a = +25c, i out = 0a, unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. parameter description conditions min (note 8) typ max (note 8) unit v out output voltage 3.3 v v oa v out accuracy @ t a = +25c (note 7) -0.2 +0.2 % tc v out output voltage temperature coefficient (note 9) 15 50 ppm/c v in input voltage range 3.4 5.5 v i in supply current t a = +25c 48 80 a t a = -40c to +125c 100 a v out / v in line regulation 3.4 v < v in < 5.5v 80 320 v/v v out / i out load regulation sourcing: 0ma i out 25ma 45 110 v/ma sinking: -1ma i out 0ma 10 v/ma v indo dropout voltage (note 10) i out = 10ma 60 150 mv i sc short circuit current t a = +25c, v out tied to gnd 126 ma t r turn-on settling time v out = 0.1%, c out = 1 f 300 s ripple rejection f = 120hz 61 db e n output voltage noise 0.1hz f 10hz 95 v p-p v n broadband voltage noise 10hz f 1khz 40 v rms v out / t a thermal hysteresis (note 11) t a = +165c 50 ppm v out / t long term stability 1000 hours, t a = +25c 50 ppm notes: 8. compliance to datasheet limits is assu red by one or more methods: production test, characterization and/or design. 9. over the specified temperature range. temperature coefficien t is measured by the box method whereby the change in v out is divided by the temperature range; in this case, -40c to +125c = +165c. 10. dropout voltage is the minimum v in - v out differential voltage measured at the point where v out drops 1mv from v in = 5.0v at t a = +25c. 11. thermal hysteresis is the change of v out measured @ t a = +25c after temperature cycling over a specified range, t a . v out is read initially at t a = +25c for the device under test. the device is temperature cycled and a second v out measurement is taken at +25c. the difference between the initial v out reading and the second v out reading is then expressed in ppm. for t a = +165c, the device under test is cycled from +25c to -40c to +125c to +25c.
isl21010 6 fn7896.0 august 9, 2011 typical performance characteristics curves (v out = 2.048v) v in = 3.0v, i out = 0ma, t a = +25c unless otherwise specified. figure 2. i in vs v in , three units figure 3. i in vs v in , over-temperature figure 4. line regulation, three units fig ure 5. line regulation over-temperature figure 6. line transient response with 0.1f load figure 7. line transient response with 10f load 35 37 39 41 43 45 47 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v in (v) i dd (a) 5.5 6.0 49 unit 2 unit 1 unit 3 20 25 30 35 40 45 50 55 60 65 70 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) +25c -40c +125c i dd (a) -100 -50 0 50 100 150 200 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) unit 2 unit 1 unit 3 v out (v) -100 -50 0 50 100 150 200 250 300 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) +25c -40c +125c -150 -100 -50 0 50 100 150 250 500 750 1000 1250 time (s) amplitude (mv) 500mv step v in = 4.5v v in = 4.5v -20 0 20 40 250 500 750 1000 1250 time (s) v in = 4.5v amplitude (mv) 500mv step v in = 4.5v
isl21010 7 fn7896.0 august 9, 2011 figure 8. load regulation over-temperature figu re 9. load transient response, at 25ma load figure 10. load transient response at 1ma load figure 11. turn-on time figure 12. z out vs frequency figure 13. ripple rejection at different capacitive loads typical performance characteristics curves (v out = 2.048v) v in = 3.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) -3 -2 -1 0 1 2 3 4 5 -30 -25 -20 -15 -10 -5 0 5 sourcing i load (ma) sinking v out (mv) +25c -40c +125c -40 -30 -20 -10 0 10 20 30 40 200 400 600 800 1000 1200 1400 time (s) 25ma 25ma amplitude (mv) 0ma -5 0 5 200 400 600 800 1000 1200 1400 time (s) 1ma 0ma amplitude (mv) 1ma @1f 1ma -1 0 1 2 3 4 5 6 0 50 100 150 200 250 300 time (s) v in 0.1f 1f v out (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 10 100 1k 10k 100k 1m 10m frequency (hz) z out ( ? ) 4.0 c l = 0.1f c l = 1f c l = 10f -100 -80 -60 -40 -20 10 100 1k 10k 100k 1m frequency (hz) c l = 1f c l = 10f c l = 0.1f 0 psrr (db)
isl21010 8 fn7896.0 august 9, 2011 figure 14. dropout (10ma sourced load) figure 15. dropout zoomed (10ma sourced load) figure 16. v out vs temperature figure 17. short circuit to gnd figure 18. v out vs noise, 0.1hz to 10hz typical performance characteristics curves (v out = 2.048v) v in = 3.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) 1.800 1.823 1.846 1.869 1.892 1.915 1.938 1.961 1.984 2.007 2.030 2.053 2.076 2.099 1.900 1.957 2.014 2.071 2.128 2.185 2.242 2.299 v in (v) v out (v) 2.0470 2.0475 2.0480 2.0485 2.0490 2.121 2.131 2.141 2.151 2.161 1mv v dropout ~ 86mv v in (v) v out (v) 2.0425 2.0435 2.0445 2.0455 2.0465 2.0475 2.0485 2.0495 2.0505 2.0515 2.0525 -55 -35 -15 5 25 45 65 85 105 125 145 temperature (c) typical temperature coefficient curve for 10 units v out (v) -180 -160 -140 -120 -100 -80 -60 -40 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 v in (v) +125c -55c +25c current (ma) -60 -40 -20 0 20 40 60 80 100 120 140 02 46 810 time (s) v out (v)
isl21010 9 fn7896.0 august 9, 2011 typical performance characteristics curves (v out = 3.0v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. figure 19. i in vs v in , three units figure 20. i in vs v in , over-temperature figure 21. line regulation, three units figure 22. line regulation over-temperature figure 23. line transient with 0.1f load figure 24. line transient response with 10f load 40 42 44 46 48 50 3.1 3.5 3.9 4.3 4.7 5.1 5.5 v in (v) unit 1 unit 2 unit 3 i dd (a) v in (v) i dd (a) 0 10 20 30 40 50 60 70 80 3.1 3.5 3.9 4.3 4.7 5.1 5.5 +25c -40c +125c -400 -200 0 200 400 600 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) unit 2 unit 1 unit 3 -400 -200 0 200 400 600 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) +25c -40c +125c -200 -100 0 100 200 250 500 750 1000 1250 time (s) amplitude (mv) 500mv step v in = 4.5v v in = 4.5v -40 -20 0 20 40 250 500 750 1000 1250 amplitude (mv) time (s) 500mv step v in = 4.5v v in = 4.5v
isl21010 10 fn7896.0 august 9, 2011 figure 25. load regulation over-temperature figure 26. load regulation over-temperature figure 27. load transient response figure 28. turn-on time figure 29. z out vs frequency figure 30. ripple rejection at different capacitive loads typical performance characteristics curves (v out = 3.0v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) -1.5 -0.5 0.5 1.5 2.5 3.5 -30 -25 -20 -15 -10 -5 0 5 sourcing i load (ma) sinking v out (mv) -40c +125c +25c time (s) amplitude (mv) -30 -20 -10 0 10 20 30 200 400 600 800 1000 1200 1400 0ma 25ma 25ma -5 0 5 200 400 600 800 1000 1200 1400 1ma 0ma 1ma @ 1f time (s) amplitude (mv) 1f -1 0 1 2 3 4 5 6 0 50 100 150 200 250 300 time (s) v out (v) v in 0.1f 0 1 2 3 4 5 6 7 10 100 1k 10k 100k 1m 10m frequency (hz) c l = 0.1f c l = 1f c l = 10f z out ( ? ) -100 -80 -60 -40 -20 0 10 100 1k 10k 100k 1m frequency (hz) c l = 10f c l = 0.1f c l = 1f psrr (db)
isl21010 11 fn7896.0 august 9, 2011 figure 31. dropout (1ma sourced load) figure 32. dropout zoomed (10ma sourced load) figure 33. v out vs temperature figure 34. short circuit to gnd figure 35. v out vs noise, 0.1hz to 10hz typical performance characteristics curves (v out = 3.0v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) 2.9500 2.9555 2.9610 2.9665 2.9720 2.9775 2.9830 2.9885 2.9940 2.9995 3.0050 3.00 3.05 3.10 3.15 3.2 0 v in (v) v out (v) 2.9985 2.9990 2.9995 3.0000 3.0005 3.057 3.059 3.061 3.063 3.065 3.067 3.069 1mv v dropout ~ 59mv v in (v) v out (v) 2.994 2.995 2.996 2.997 2.998 2.999 3.000 3.001 3.002 -55 -35 -15 5 25 45 65 85 105 125 14 5 temperature (c) typical temperature coeffi cient curve for 10 units v out (v) -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) +125c -55c current (ma) +25c -60 -40 -20 0 20 40 60 80 100 120 140 0246810 time (s) v out (v)
isl21010 12 fn7896.0 august 9, 2011 typical performance characteristics curves (v out = 3.3v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. figure 36. i in vs v in , three units figure 37. i in vs v in , over-temperature figure 38. line regulation, three units fig ure 39. line regulation over-temperature figure 40. line transient with 0.1f load figure 41. line transient response with 10f load 20 30 40 50 60 70 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) unit 1 unit 2 unit 3 i dd (a) 20 30 40 50 60 70 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) i dd (a) +25c -40c +125c -200 -100 0 100 200 300 400 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) unit 2 unit 1 unit 3 -400 -200 0 200 400 600 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) +25c -40c +125c -200 -100 0 100 200 250 500 750 1000 1250 time (s) amplitude (mv) 500mv step v in = 4.5v v in = 4.5v -200 -100 0 100 250 500 750 1000 1250 time (s) amplitude (mv) 500mv step v in = 4.5v v in = 4.5v
isl21010 13 fn7896.0 august 9, 2011 figure 42. load regulation over-temperature figure 43. load regulation over-temperature figure 44. load transient response figure 45. turn-on time figure 46. z out vs frequency figure 47. ripple rejection at different capacitive loads typical performance characteristics curves (v out = 3.3v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -30 -25 -20 -15 -10 -5 0 5 v out (mv) +25c -40c +125c sourcing i load (ma) sinking -30 -20 -10 0 10 20 200 400 600 800 1000 1200 1400 time (s) 0ma 25ma amplitude (mv) 25ma @ 0.1f 25ma -10.0 -5.0 0.0 5.0 200 400 600 800 1000 1200 1400 time (s) 1ma 0ma amplitude (mv) -1 0 1 2 3 4 5 6 0 50 100 150 200 250 300 time (s) 0.1f v out (v) v in 1f z out ( ? ) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 10 100 1k 10k 100k 1m 10m frequency (hz) c l = 0.1f c l = 1f c l = 10f psrr (db) -100 -80 -60 -40 -20 0 10 100 1k 10k 100k 1m frequency (hz) c l = 10f c l = 0.1f c l = 1f
isl21010 14 fn7896.0 august 9, 2011 figure 48. dropout (1ma sourced load) figure 49. dropout zoomed (10ma sourced load) figure 50. v out vs temperature figure 51. short circuit to gnd figure 52. v out vs noise, 0.1hz to 10hz typical performance characteristics curves (v out = 3.3v) v in = 5.0v, i out = 0ma, t a = +25c unless otherwise specified. (continued) v out (v) 3.250 3.255 3.260 3.265 3.270 3.275 3.280 3.285 3.290 3.295 3.300 3.305 3.310 3.30 3.32 3.34 3.36 3.38 3.40 3.42 3.44 3.46 3.48 3.50 v in (v) 3.2980 3.2985 3.2990 3.2995 3.3000 3.350 3.355 3.360 3.365 3.370 1mv v dropout ~58mv v in (v) v out (v) v out (v) 3.290125 3.293125 3.296125 3.299125 3.302125 3.305125 -55 -35 -15 5 25 45 65 85 105 125 145 temperature (c) current (ma) -170 -150 -130 -110 -90 -70 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) +25c -55c +125c v out (v) -60 -40 -20 0 20 40 60 80 100 120 140 0246810 time (s)
isl21010 15 fn7896.0 august 9, 2011 applications information micropower operation the isl21010 consumes very low supply current due to the proprietary bandgap technology. low noise performance is achieved using optimized biasing techniques. supply current is typically 48a and noise in the 0.1hz to 10hz bandwidth is 58v p-p to 100v p-p (v out = 2.048v, 3.0v, and 3.3v) benefitting precision, low noise portable ap plications such as handheld meters and instruments. data converters in particular can utilize the isl21010 as an external voltage reference. low power dac and adc circuits will realize maximum resolution with lowest noise. the device maintains output voltage during conversion cycles with fast response, although it is helpful to add an output capacitor, typically 1f. board mounting considerations for applications requiring the hi ghest accuracy, board mounting location should be reviewed. the device uses a plastic soic package, which will subject the die to mild stresses when the printed circuit (pc) board is heated and cooled, slightly changing the shape. placing the device in areas subject to slight twisting can cause degradation of the accuracy of the reference voltage due to these die stresses. it is normally best to place the device near the edge of a board, or th e shortest side, as the axis of bending is most limited at that location. mounting the device in a cutout also minimizes flex. obviously mounting the device on flexprint or extremely thin pc material will likewise cause loss of reference accuracy. board assembly considerations bandgap references provide high accuracy and low temperature drift but some pc board assemb ly precautions are necessary. normal output voltage shifts of 100v to 4mv can be expected with pb-free reflow profiles or wave solder on multi-layer fr4 pc boards. precautions should be ta ken to avoid excessive heat or extended exposure to high reflow or wave solder temperatures, this may reduce device initial accuracy. noise performance and reduction the recommended capacitive load range for the isl21010 is from 0.1f to 10.0f to ensure stability and best transient performance. parallel 0.1f and 10f capacitors can be used to optimize performance as well. the noise specification stated in the electrical specification tables (s tarting on page 4) is for 0.1f capacitive load, and larger values will reduce the output noise level. typical application circuit figure 53. kelvin sensed load 0.1f vin 2.1v ? 5.5v vout sense load vin vout gnd isl21010 10f 0.1f - 10f
isl21010 16 intersil products are manufactured, assembled and tested utilizing iso9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnished by intersil is believed to be accurate and reliable. however, no responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn7896.0 august 9, 2011 for additional products, see www.intersil.com/product_tree products intersil corporation is a leader in the design and manufacture of high-performance analog semico nductors. the company's product s address some of the industry's fastest growing markets, such as , flat panel displays, cell phones, handheld products, and noteb ooks. intersil's product families address power management and analog signal processi ng functions. go to www.intersil.com/products for a complete list of intersil product families. for a complete listing of applications, rela ted documentation and related parts, please see the respective device information p age on intersil.com: isl21010 to report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff fits are available from our website at http://rel.intersil.com/reports/search.php revision history the revision history provided is for inform ational purposes only and is believed to be accurate, but not warranted. please go t o web to make sure you have the latest rev. date revision change 8/9/11 fn7896.0 initial release
isl21010 17 fn7896.0 august 9, 2011 package outline drawing p3.064 3 lead small outline transistor plastic package (sot23-3) rev 2, 9/09 reference jedec to-236. footlength is measured at reference to gauge plane. dimension does not include interlead flash or protrusions. dimensioning and tolerancing conform to amsey14.5m-1994. 3. 5. 4. 2. dimensions are in millimeters. 1. notes: detail "a" side view typical recommended land pattern top view c 0.10 c 0.20 m c l c 1.300.10 c l 0.950 2.370.27 2.920.12 4 4 10 typ (2 plcs) 0.013(min) 0.100(max) seating plane 1.000.12 0.910.03 seating plane gauge plane 0.25 0.310.10 detail "a" 0.4350.065 0 - 8 deg. (2.15) (1.25) (0.60) (0.95 typ.) 5 0 . 1 3 0 . 0 5 dimensions in ( ) for reference only. interlead flash or protrusions shall not exceed 0.25mm per side.

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