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1/14 october 2003 n v out1 = +3.3v fixed n v out2 = 1.25 to 3.0v adjustable n guaranteed output1 current: 1a n guaranteed output2 current: 1a n 2% output tolerance (at 25c) n typical dropout 1.1v (i out1 =i out2 =1a) n internal power and thermal limit n stable with low esr output capacitor n operating temperature range: 0c to 125c n available in ppak and spak-5l (powerflex ? ) package description specifically designed for data storage applications, this device integrates two voltage regulators, each one able to supply 1a. it is assembled in ppak and in a new surface mounting package named spak (powerflex ? )at 5 pins. the first regulator block supply 3.3v to power the read channel and memory chips requiring this voltage. the second one is an adjustable output voltage from 1.25v to 3.0v that could power several kind of different micro-controllers. both outputs are current limited and overtemperature protected. the very good thermal performances of the package spak with only 2c/w of thermal resistance junction to case is important to underline. ST2L01 dual voltage regulator over current protection over current protection thermal protection err-amp power output vref2 power output vref1 ra rb err-amp vout2 adj gnd vout1 over current protection over current protection thermal protection err-amp power output vref2 power output vref1 ra rb err-amp vout2 adj gnd vout1 schematic diagram spak-5l (powerflex ? ) ppak
ST2L01 2/14 absolute maximum ratings general operating condition thermal data connection diagram (top view) pin description ordering information (*) available in tape & reel with the suffix "r" symbol parameter value unit v in input voltage 10 v v esd esd tolerance (human body model) 4kv t stg storage temperature range -55 to +125 c t j operating junction temperature range 0 to +125 c symbol parameter value unit v in input voltage 4.75 to 5.25 v d v in input voltage ripple 0.15 v t r input voltage rise time (10% to 90%) 3 1 m s t f input voltage fall time (90% to 10%) 3 1 m s symbol parameter spak-5l ppak unit r thj-case thermal resistance junction-case 2 8 c/w ppak spak-5l pin n symbol name and function 1v i input pin: bypass with a 1 m f capacitor to gnd 2 adj adj pin: resistor divider connection 3 gnd ground pin 4v o2 output pin: adjustable output voltage; bypass with a 1 m f capacitor to gnd 5v o1 output pin: fixed (3.3v) output voltage; bypass with a 1 m f capacitor to gnd type spak (power flex ? ) 5 leads (*) ppak (*) ST2L01 ST2L01k5 ST2L01pt
ST2L01 3/14 typical application circuit note: c o1 value could be lowered down to 470nf ceramic capacitor (x7r); c i ,c o1 and c o2 capacitors must be located not more than 0.5" from the outputs pins of the device. for more details about capacitors read the "application hints" electrical characteristics of output 1 (v i =5v, i o1 =10ma t j = 0 to 125c unless otherwise specified. typical values are referred at t j = 25c, c i =1 m f (tantalum), c o1 =c o1 =1 m f(x7r) note 1: low duty cycle pulse testing with kelvin connections are required in order to maintain accurate data note 2: dropout voltage is defined as the minimum differential voltage between v i and v o required to maintain regulation at v o .itismeas- ured when the output voltage drops 1% below its nominal value. note 3: transient response is defined with a step change in load from 10ma to 500ma as the time from the load step until the output voltage reaches its minimum value. note 4: minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation. note 5: guaranteed by design, not tested in production. symbol parameter test conditions min. typ. max. unit i i input current i o1 =i o2 =0 t j = 0 to 125c 15 28 ma v o1 output voltage 1 t j = 25c 3.23 3.3 3.37 v i o1 = 5ma to 1a v i = 4.75 to 5.25v t j = 0 to 125c 3.2 3.3 3.4 d v o1 line regulation 1 v i = 4.75 to 5.25v 0.1 6 mv d v out1 load regulation 1 i o = 0.01 to 1a (note 1) 3 12 mv v d1 dropout voltage 1 i o =1a t j = 0 to 125c (note 2) 1.1 1.3 v t tr transient response i o =10to500mat rise =t fall =1 m s (note 3, 5) <1 m s i sc1 current limit 1 r l =0 t j = 0 to 125c 1 a i o1 minimum load current 1 t j = 0 to 125c (note 4) 0 ma svr1 supply voltage rejection v i =5 0.25v i o1 =100ma t j = 0 to 125c (note 5) f i = 100hz 60 68 db f i = 1khz 60 70 f i = 10khz 50 65 f i = 100khz 30 38 thermal regulation i o = 1a, t pulse = 30ms (note 5) 0.1 %/w en1 output noise b= 10hz to 10khz (note 5) 40 m vrms d v o1 temperature stability t j = 0 to 125c (note 5) 0.5 %v o d v o1 long term stability t j = 125c, 1000hrs (note 5) 0.3 %v o r 1 v o =v ref (1 + ?? )+i adj r 1 r 2
ST2L01 4/14 electrical characteristics of output 2 (v i =5v, i o2 =10ma t j = 0 to 125c unless otherwise specified. typical values are referred at t j =25c,c i =1 m f (tantalum), c o1 =c o1 =1 m f (x7r). refer to "typical application circuit "figure with r 1 =r 2 =120 w ". note 1: low duty cycle pulse testing with kelvin connections are required in order to maintain accurate data note 2: dropout voltage is defined as the minimum differential voltage between v i and v o required to maintain regulation at v o .itismeas- ured when the output voltage drops 1% below its nominal value. note 3: transient response is defined with a step change in load from 10ma to 500ma as the time from the load step until the output voltage reaches its minimum value. note 4: minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation. note 5: guaranteed by design, not tested in production. symbol parameter test conditions min. typ. max. unit v i operating input voltage i o2 =5ma to 1a t j = 0 to 125c 4.5 v v o2 output voltage 2 t j = 25c 2.45 2.5 2.55 v v ref reference voltage (measured between pins 4 and 2) t j = 25c 1.225 1.25 1.275 v i o1 = 5ma to 1a v i = 4.75 to 5.25v t j = 0 to 125c 1.2125 1.25 1.2875 d v o2 line regulation 2 v i = 4.75 to 5.25v 0.004 0.2 % d v o2 load regulation 2 i o = 0.01 to 1a (note 1) 0.08 0.4 % v d2 dropout voltage 2 i o =1a t j = 0 to 125c (note 2) 1.1 1.3 v t tr transient response i o =10to500mat rise =t fall =1 m s (note 3, 5) <1 m s i sc2 current limit 2 r l =0 t j = 0 to 125c 1 a i o2 minimum load current 2 t j = 0 to 125c (note 4) 1 ma i adj adjust pin current t j = 0 to 125c 35 120 m a d i adj adjust pin current i o1 = 5ma to 1a v i = 4.75 to 5.25v t j = 0 to 125c 05 m a svr2 supply voltage rejection v i =5 0.25v i o1 =100ma t j = 0 to 125c (note 5) f i = 100hz 70 77 db f i = 1khz 70 80 f i = 10khz 50 65 f i = 100khz 30 43 thermal regulation 2 i o = 1a, t pulse = 30ms (note 5) 0.1 %/w en2 output noise 1 b= 10hz to 10khz (note 5) 30 m vrms d v ref temperature stability t j = 0 to 125c (note 5) 0.5 %v o d v ref long term stability t j = 125c, 1000hrs (note 5) 0.3 %v o
ST2L01 5/14 application hints external capacitors like any low-dropout regulator, the ST2L01 requires external capacitors for stability. we suggest to solder both capacitors as close as possible to the relative pins (1, 2 and 5). input capacitors an input capacitor, whose value is at least 1 m f, is required; the amount of the input capacitance can be increased without limit if a good quality tantalum or aluminum capacitor is used. sms x7r or y5v ceramic multilayer capacitors could not ensure stability in any condition because of their variable characteristics with frequency and temperature; the use of this capacitor is strictly related to the use of the output capacitors. for more details read the "output capacitor section". the input capacitor must be located at a distance of not more than 0.5" from the input pin of the device and returned to a clean analog ground. output capacitor the ST2L01 is designed specifically to work with ceramic and tantalum capacitors. special care must be taken when a ceramic multilayer capacitor is used. special care must be taken when a ceramic multilayer capacitor is used. due to their characteristics they can sometimes have an esr value lower than the minimum required by the ST2L01 and their relatively large capacitance can change a lot with the ambient temperature. the test results of the ST2L01 stability using multilayer ceramic capacitors show that a minimum value of 1 m f is needed for the adjustable regulator (set to 2.5v). this value can be increased up to 10 m f when a tantalum capacitor is used on the input. a higher value c o can have an esr lower than the accepted minimum. when a ceramic capacitor is used on the input the output capacitance must be in the range from 1 m f to 2.2 m fifc i =1 m f, and from 1 m fto4.7 m fif c i =2.2 m f. the 3.3v regulator stable with a 470nf capacitor. this value can be increased up to 10 m fifa tantalum capacitor is used on the input. a higher value c o canhaveanesrlowerthanthe accepted minimum. when a ceramic capacitor is used in the input the output capacitance must be in the range from 1 m f to 2.2 m fifc i =1 m f, and from 1 m fto4.7 m fif c i =2.2 m f. surface-mountable solid tantalum capacitors offer a good combination of small physical size for the capacitance value and esr in the range needed by the ST2L01. the test results show good stability for both outputs with values of at least 1 m f. the value can be increased without limit for even better performance such a transient response and noise. important ; the output capacitor must maintain its esr in the stable region over the full operating temperature to assure stability. also, capacitor tolerance and variation with temperature must be considered to assure that the minimum amount of capacitance is provided at all times. for this reason, when a ceramic multilayer capacitor is used, the better choice for temperature coefficient is the x7r type, which holds the capacitance within 15%. the output capacitor should be located not more than 0.5" from the output pins of the device and returned to a clean analog ground. adjustable regulator the ST2L01 has a 1.25v reference voltage between the output and the adjustable pins (respectively pin 4 and 2). when a resistor r2 is placed between these two terminals a constant current flows through r2 and down to r1 to set the overall (v o2 to gnd) output voltage. minimum load current is 1ma. i adj is very small (typically 35 m a) and constant; in the v o calculation it can be ignored.
ST2L01 6/14 typical characteristics (c i =1 m f, c o =1 m f(x7r)) figure 1 : input current vs temperature figure 2 : input current vs input voltage figure 3 : output voltage vs temperature figure 4 : load regulation vs temperature figure 5 : output voltage vs input voltage figure 6 : dropout voltage vs temperature
ST2L01 7/14 figure 7 : line regulation vs temperature figure 8 : supply voltage rejection vs frequency figure 9 : supply voltage rejection vs temperature figure 10 : dropout voltage vs output current figure 11 : reference voltage vs temperature figure 12 : output voltage vs input voltage
ST2L01 8/14 figure 13 : line regulation vs temperature figure 14 : load regulation vs temperature figure 15 : supply voltage rejection vs temperature figure 16 : dropout voltage vs temperature figure 17 : dropout voltage vs output current figure 18 : supply voltage rejection vs frequency
ST2L01 9/14 figure 19 : adjustable pin vs temperature figure 20 : minimum load current vs temperature figure 21 : load transient figure 22 : load transient figure 23 : load transient figure 24 : load transient v i =5 v , i o1 =5 00 to 10 m a , c o = 1 m f(x 7 r) , t j = 2 5 c v i =5 v , v o =a dj uste d to 2 .5 v , i o =5 00 to 10 m a , c o = 1 m f(x 7 r) t j =25c v i =5 v , v o =a dj uste d to 2 .5 v , i o2 = 10 to 5 00 m a , c o = 1 m f(x 7 r) v i =5 v , i o1 = 10 to 5 00 m a , c o = 1 m f(x 7 r)
ST2L01 10/14 dim. mm. inch min. typ max. min. typ. max. a 1.78 2.03 0.070 0.080 a2 0.03 0.13 0.001 0.005 c 0.25 0.010 c1 0.25 0.010 d 1.02 1.27 0.040 0.050 d1 7.87 8.13 0.310 0.320 f 0.63 0.79 0.025 0.031 g 1.69 0.067 g1 6.8 0.268 h1 5.59 0.220 h2 9.27 9.52 0.365 0.375 h3 8.89 9.14 0.350 0.360 l 10.41 10.67 0.410 0.420 l1 7.49 0.295 l2 8.89 9.14 0.350 0.360 m 0.79 1.04 0.031 0.041 n 0.25 0.010 v3? 6?3? 6? spak-5l mechanical data po13f1/b
ST2L01 11/14 dim. mm. inch min. typ max. min. typ. max. a 2.2 2.4 0.086 0.094 a1 0.9 1.1 0.035 0.043 a2 0.03 0.23 0.001 0.009 b 0.4 0.6 0.015 0.023 b2 5.2 5.4 0.204 0.212 c 0.45 0.6 0.017 0.023 c2 0.48 0.6 0.019 0.023 d 6 6.2 0.236 0.244 e 6.4 6.6 0.252 0.260 g 4.9 5.25 0.193 0.206 g1 2.38 2.7 0.093 0.106 h 9.35 10.1 0.368 0.397 l2 0.8 0.031 l4 0.6 1 0.023 0.039 ppak mechanical data 0078180-b
ST2L01 12/14 dim. mm. inch min. typ max. min. typ. max. a 180 7.086 c 12.8 13.0 13.2 0.504 0.512 0.519 d 20.2 0.795 n 60 2.362 t 14.4 0.567 ao 9.70 9.80 9.90 0.382 0.386 0.390 bo 10.85 10.95 11.05 0.423 0.427 0.431 ko 2.30 2.40 2.50 0.090 0.094 0.098 po 3.9 4.0 4.1 0.153 0.157 0.161 p 11.9 12.0 12.1 0.468 0.472 0.476 tape & reel spak-xl mechanical data
ST2L01 13/14 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.0 13.2 0.504 0.512 0.519 d 20.2 0.795 n 60 2.362 t 14.4 0.567 ao 6.80 6.90 7.00 0.268 0.272 0.2.76 bo 10.40 10.50 10.60 0.409 0.413 0.417 ko 2.55 2.65 2.75 0.100 0.104 0.105 po 3.9 4.0 4.1 0.153 0.157 0.161 p 7.9 8.0 8.1 0.311 0.315 0.319 tape & reel dpak-ppak mechanical data
ST2L01 14/14 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com

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