rev. pr a | page 1 of 9 500ma low-dropout linear regulator in msop package preliminary technical data adp1715/adp1716 features 16 fixed output voltage options from 0.75v to 3.3v adjustable output voltage from 0.8v to 5v wide 2.5v to 5.5v input voltage range low dropout voltage: 250 mv @500ma 1% initial accuracy high psrr (60db @1khz) 1 m mm m a shutdown current adjustable soft-start option available output voltage tracking option available optimized for small ceramic capacitors thermal overload protection short circuit protection small thermally-enhanced msop package applications telecom equipment network equipment dsp/fpga/microprocessor supplies instrumentation equipment/data acquisition systems typical application circuit figure 1. adp1715/16 typical operation circuit general description the adp1715/16 is a 500ma low-dropout linear regula tor that uses an advanced, proprietary architecture to provide high power supply rejection ratio (psrr) and excellent l ine and load transient response with just a small 2.2 m f ceramic output capacitor. supply current in shutdown mode is reduc ed to less than 1 m a. three versions of this part are available: one with fixed output voltage and variable soft-start, one with fixed out put voltage and output voltage tracking, and one with adjustabl e output voltage and fixed soft start. the fixed output vol tage is internally set to one of sixteen values between 0.7 5v and 3.3v while the adjustable output voltage can be set between 0.8v and 5.0v by an external voltage divider from o ut to adj. the variable soft-start uses an external capa citor at ss to control the output voltage ramp while the intern al soft-start uses a 3pf capacitor to give a constant 24 m s ramp. tracking limits the output voltage to the at-or-below voltag e at the trk pin. the adp1715/16 is available in a thermally-enhanced msop package, making it a very compact solution for appl ications requiring up to 500ma of output current in a small, low- profile footprint. pin configuration rev . pra information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other right s of third parties that may result from its use. specifications subject to chan ge without notice. no license is granted by implication or otherwise under any pa tent or patent rights of analog devices. trademarks and registered trademark s are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 0206 2-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ? 200 6 analog devices, inc. all rights reserved.
preliminary technical data adp1715/adp1716 rev. pr a | page 2 of 9 adp1715/16 target specifications table 1. electrical characteristics v in = 5v, i out = 100ma, c load = 2.2 f, t a = 25c, bold values indicate spec applies over t j =-40c to 125c, unless otherwise noted. parameter conditions min typ max unit input voltage 2.5 5.5 v 100ua 80 90 a 100ma operating supply current 500ma shutdown supply current en = gnd 0.1 1.0 a i out = 10ma -1 +1 % 10ma < i out < 500ma -2 +2 % fixed output voltage accuracy 10ma < i out < 500ma, t a = -40c to 85c -3 +3 % adj regulation votlage i out = 10ma 792 800 808 mv 10ma < i out < 500ma 784 816 mv adj inupt bias current v adj =v out na line regulation v in = (v out + 0.5v) to 5.5v, i out = 1ma -0.15 0 +0.15 %/v load regulation 10ma < i out < 500ma 0.01 0.04 %/a i out = 100ma 125 250 mv dropout voltage (note 1) i out = 500ma 250 current limit threshold v out = 0.9 x v out(nom) 550 tbd 850 ma thermal shutdown temperature typical thermal hysteresis = 15 c 150 c ss source current adp1715 only, ss =gnd 0.8 1 1.2 m a ss pull up voltage adp1715, (not to be inlduced in final data sheet, design spec only) 1.0 1.5 v ss pull down resistance adp1715, en = gnd (not to be included on final data sheet, design spec only) 12 w trk to out accuracy adp1716-xx only, v trk = 0.5 x v out(nom) -50 0 50 mv en input high 2.5v v in 5.5v 1.8 v en input low 2.5v v in 5.5v 0.8 v en input leakage current en = in or gnd -0.1 0 +0.1 a psrr 1khz, iout = 500ma 60 db output noise tbd uvrms notes: 1. dropout voltage is defined as the input to outpu t voltage differential when the input voltage is se t to the nominal output voltage. applies for output voltages above 2.5v only.
preliminary technical data adp1715/adp1716 rev. pr a | page 3 of 9 absolute maximum ratings table 2 absolute maximum ratings (at 25c, unless otherwise noted) parameter rating in, out, en, trk, adj, ss to gnd 6 v out to in -0.3v to (v in + 0.3v) maximum output current tbd storage temperature range ?65c to +150c operating junction temperature range ?40c to +125 c maximum junction temperature 150c lead temperature range (soldering, 10sec) 300c table 3 thermal resistance package type q qq q ja 1 unit 8-lead thermally enhanced msop tbd c/w 1 q ja is specified for the worst-case conditions, i.e., q ja is specified for device soldered in circuit board for surface mount packages. esd caution esd (electrostatic discharge) sensitive device. ele ctrostatic charges as high as 4000 v readily accumulate on the human body and test equipment and can discharge without detection. although these products feature proprietary esd protection circuit ry, permanent damage may occur on devices subjected to high energy electrostatic discharges. therefore, proper esd precautions are recommended to avoid performance degradation or loss of functio nality.
preliminary technical data adp1715/adp1716 rev. pr a | page 4 of 9 pin description table 4. pin numbers are preliminary and subject to change) adp1715 pin number -xxx -adj adp1716 description 2 in in in power source input. in is the source in put to the ldo. connect the input voltage to in. bypass in to gnd with a 2.2 m f or greater capacitor. 3 out out out regulated votlage output. out is the output voltage of the ldo. bypass out to gnd with a 2.2 m f or greater capacitor 1 en en en enable input. the adp1715/16 is turned on/off by the state of en. drive en high to turn on the ldo, drive it low to turn it off. for automatic startup, connecte en to in. ss soft-start control input. connect a capacitor from ss to gnd to set the soft- start period. a 10nf capacitor sets the soft-start period to 8ms. if not used, the part will have a fixed startup ramp of 24 s. adj adjustable output voltage control input. a r esistive voltage divider from out to adj sets the output voltage for adjustable o utput voltage versions. these parts will have a fixed startup ramp of 24 m s. 4 trk tracking input. a voltage applied to trk lim its the output voltage. to force the output votlage to track an external signal, dri ve trk with that signal. if not used, connect trk to in. 5, 6, 7, 8 gnd gnd gnd ground. pin configurations:
preliminary technical data adp1715/adp1716 rev. pr a | page 5 of 9 typical performance characteristics temperature ? o c 85 125 25 0 ?40 v out ? v 10.010 10.005 10.000 9.995 9.990 9.985 figure 1. output voltage vs. load current temperature ? o c 85 125 25 0 ?40 v out ? v 5.008 5.004 5.000 4.996 4.992 figure 2.ground current vs. input voltage temperature ? o c ?40 v out ? v 2.502 2.501 ?25 ?10 5 20 35 50 65 80 95 110 125 2.500 2.499 2.498 figure 3. output voltage vs. temperature 12 28 16 20 24 32 36 40 supply current ? ma 0.8 0.7 0.6 0.5 0.4 input voltage ? v +125 o c +25 o c ?40 o c figure 4.ground current vs. load current
preliminary technical data adp1715/adp1716 rev. pr a | page 6 of 9 12 28 16 20 24 32 36 40 8 input current C ma +125 o c 0.8 0.7 0.6 0.5 0.4 input voltage C v +25 o c C40 o c figure 5. ground current vs., temperature input voltage C v 5 supply current C ma 10 15 20 25 30 35 40 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 +125 o c C40 o c +25 o c figure 6. psrr vs. frequency 40 25 20 0 85 125 30 10 i l = 0 to 10ma load regulation C ppm/ma temperature C o c v in = 40v v in = 14v 50 0 C40 C40 C30 C20 C10 figure 7. dropout voltage vs. load current 40 20 0 50 85 125 30 10 i l = 0 to 5ma load regulation C ppm/ma temperature C o c v in = 40v v in = 8v 25 0 C40 C20 C10 figure 8.load transient response
preliminary technical data adp1715/adp1716 rev. pr a | page 7 of 9 theory of operation introduction the adp1715/16 is a low-dropout linear regulator th at uses an advanced, proprietary architecture to provide hi gh power supply rejection ratio (psrr) and excellent line an d load transient response with just a small 2.2 m f ceramic output capacitor. supply current in shutdown mode is reduc ed to 1 m a. three versions are available: one with fixed output voltage and soft-start, one with fixed output voltage and o utput voltage tracking, and one with adjustable output vo ltage. the fixed output voltage is internally set to one of si xteen values between 0.75v and 3.3v. the adjustable output volt age is set between 0.8v and 5.0v by an external voltage divide r from out to adj. the soft-start uses an external capaci tor at ss to control the output voltage ramp. in the case of the adjustable version, adp1715-adj, the soft-start is controlled by an internal 3pf capacitor, limiting the output v oltage ramp- up period to approximately 24 m s. tracking limits the output voltage to the at-or-below the voltage at trk. the adp1715/16 is available in a thermally-enhanced msop package, making it a very compact solution for appl ications requiring up to 500ma in a small, low-profile footp rint. soft-start function (adp1715) for applications that require a controlled startup, the adp1715 provides a programmable soft-start function. progra mmable soft-start is useful for reducing inrush current up on startup and for providing voltage sequencing. to implement soft -start, connect a capacitor from ss to gnd. upon startup, a 1a current source charges the capacitor. the adp1715 s tartup output voltage is limited by the voltage at ss, pro viding a smooth ramp up to the nominal output voltage. the s oft-start time is calculated by t ss = v ref x (c ss /i ss ), where t ss is the soft-start period, v ref is the 0.8v reference voltage, c ss is the soft-start capacitance from ss to gnd, and i ss is the current sourced from ss (1a). note that when the adp1715 i s disabled, the soft-start capacitor is discharged to gnd through an internal 100 w resistor. in the case of the adjustable output version, there is no pin for soft-start, so the function is switched to an inter nal 3pf capacitor. this sets the soft-start ramp-up period to approximately 24 m s. using the suggested 2.2 m f output capacitor, the resulting input inrush current is ap proximately 460ma, which is less than the maximum 500ma load cu rrent. voltage tracking function (adp1716) for applications that require voltage tracking, the adp1716 provides a trk pin. the adp1716?s output voltage is not allowed to exceed the voltage on the trk pin, allow ing control of the output voltage of the adp1716 by another vol tage rail in the system. the adp1716?s tracking function is alwa ys enabled, hence if the voltage applied to trk pin dr ops below the output voltage at any time, the adp1716?s outpu t tracks it down. this ensures that the adp1716 provides proper voltage tracking under startup and shutdown as well as unde r fault conditions. the adp1716 is only available in the fixed output v oltage version. a voltage divider is present from trk to the error amplifier input whose divider ratio is equal to the divider from out to the error amplifier. this sets the output v oltage equal to the tracking voltage. both divider ratios are set by post- package trim depending on the desired output voltag e. output capacitor selection the adp1715/16 is optimized for operation with smal l ceramic capacitors. for output voltages, v out 3 2v, the adp1715/16 operates with just 2.2 m f of output capacitance. for output voltages below 1.8v, additional output capacitance may be required. ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior over temp erature and applied voltage. when choosing your capacitor be su re to choose a dielectric adequate to ensure the minimum capacitance over the necessary temperature range. thermal protection and current limit the adp1715/16 contains internal current limiting t o protect itself and it?s loads during overload and short-cir cuit conditions. in addition to current limiting, this d evice contains automatic thermal overload protection circuitry to provide additional protection under continuous short-circui t conditions. adjustable output voltage the adp1715-adj?s output voltage is adjustable over a 0.8v to 5.0v range. the output voltage is set by connect ing a resistive voltage divider from out to adj. the out put voltage is calculated using the equation vout=0.8v(1+r top /r bottom ) where r top is the resistor from out to adj and r bottom is the resistor from adj to gnd. the maximum bias current into adj is 100na, so for less than 0.1% error due to th e bias current, use values less than 12k w for r bottom . shutdown the adp1715/16 includes a low power shutdown state entered by driving en to gnd. in shutdown, power consumptio n is 1 m a. when the adp1715-xx is disabled, the soft-start capacitor c ss is discharged to gnd with a 100 w resistance. package and power dissipation the adp1715/16 use a thermally-enhanced msop packag e, which achieves a respectable tbd c/w for such a small footprint.
preliminary technical data adp1715/adp1716 rev. pr a | page 8 of 9 outline dimensions
preliminary technical data adp1715/adp1716 rev. pr a | page 9 of 9 ordering guid e table 5 output voltage temperature range adp1715/16 v o (v) variable soft- start option tracking option package description package option top mark 1 no. of parts per reel (c) adp1715-075 0.75v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-080 0.80v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-085 0.85v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-090 0.90v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-095 0.95v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-100 1.00v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-105 1.05v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-110 1.10v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-115 1.15v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-120 1.20v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-130 1.30v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-150 1.50v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-180 1.80v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-250 2.50v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-300 3.00v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-330 3.30v yes no 8-lead msop rn tbd tbd -40 c to +125 c adp1715-adj 0.8v to 5.0v no no 8-lead msop rn tbd tbd -40 c to +125 c adp1716-075 0.75v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-080 0.80v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-085 0.85v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-090 0.90v no yes 8-lead msop rn tbd tbd -40 c to +125 c ADP1716-095 0.95v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-100 1.00v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-105 1.05v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-110 1.10v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-115 1.15v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-120 1.20v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-130 1.30v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-150 1.50v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-180 1.80v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-250 2.50v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-300 3.00v no yes 8-lead msop rn tbd tbd -40 c to +125 c adp1716-330 3.30v no yes 8-lead msop rn tbd tbd -40 c to +125 c
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