ts2950/a 150ma ultra low dropout voltage regulator 1/10 version: d11 to - 92 to - 252 (dpak) general description the ts2950/a are low power voltage regulators. thes e devices are excellent choice for use in battery-p owered applications such as cordless telephone, radio cont rol systems, and portable computers. the ts2950/a is features very low quiescent current (75ua typ.) and very low drop output voltage (typ. 40uv at light load and 380 mv at 100 ma). this includes a t ight initial tolerance of 1% (a version), extremely good load and line regulation 0.05% typ. and very low output temperature coefficient, making the ts2950/a useful as a low- power voltage reference. features extremely low quiescent current low dropout voltage extremely tight load and line regulation very low temperature coefficient need only 1uf for stability use as regulator or reference stable with low-esr output capacitors current and thermal limiting ordering information part no. package packing ts2950ct xx b0 to-92 1kpcs / bulk ts2950ct xx a3 to-92 2kpcs / ammo ts2950act xx b0 to-92 1kpcs / bulk ts2950act xx a3 to-92 2kpcs / ammo ts2950cp xx ro to-252 2.5kpcs / 13 reel ts2950acp xx ro to-252 2.5kpcs / 13 reel note: where xx denotes voltage option, available are 50 = 5.0v 33 = 3.3v 30 = 3.0v contact factory for additional output voltage optio n. application battery powered systems smps post-regulator voltage reference portable consumer equipment radio control system absolute maximum rating parameter symbol limit unit to-92 to-252 input supply voltage v in - 0.3 ~ +30 v power dissipation pd internally limited w operating junction temperature range t j - 40 ~ +125 o c storage temperature range t stg -65 ~ +150 o c lead temperature (soldering 5 second) t stg 260 o c thermal resistance junction to ambient r ? ja 160 100 o c/w thermal resistance junction to case r ? jc 80 2.87 o c/w pin definition : 1. output 2. ground 3. input pin definition : 1. input 2. ground 3. output
ts2950/a 150ma ultra low dropout voltage regulator 2/10 version: d11 electrical characteristics (v in =v out +1v, ta=25 o c, unless otherwise specified.) parameter test conditions (note 2) min typ max unit output voltage tj=25 o c ts2950 |0.985| 5.0 3.3 3.0 |1.015| v ts2950a |0.990| |1.010| full operating temp ts2950 |0.980| |1.020| ts2950a |0.988| |1.012| 100ua i l 100ma tj tj(max) ts2950 |0.975| |1.025| ts2950a |0.985| |1.015| output voltage temperature coefficient (note 1) ts2950 -- 50 150 ppm/ o c ts2950a -- 20 100 line regulation (note 3) 6v v in 30v (note 4) -- 0.04 0.2 % load regulation (note 3) 100ua i l 100ma -- 0.1 0.3 % dropout voltage (note 5) i l =100ua i l =100ma -- 50 380 80 450 mv mv ground current i l =100ua i l =100ma -- 75 8 120 12 ua ma dropout ground current v in = 4.5v, i l = 100ua -- 110 170 ua current limit v out = 0 -- 160 250 ma thermal regulation -- 0.05 0.2 %w output noise, 10hz to 100khz c l = 1uf c l = 200uf c l = 3.3uf -- -- -- 430 160 100 -- -- -- uv/ rms note 1: output voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. note 2: unless otherwise specified all limits guaranteed f or t j = 25 o c, vin= 6v, i l = 100ua and c l = 100uf. note 3: regulation is measured at constant junction temper ature, using pulse testing with a low duty cycle. changes in output voltage due to heating effects ar e covered under the specification for thermal regul ation. note 4: line regulation is guaranteed by design to 0.2%. note 5: dropout voltage is defined as the input to output d ifferential at which the output voltage drops 100mv below its nominal value measured at 1v differential at very low value of programmed output voltage, th e minimum input supply voltage of 2v (2.3v over temperature) must be taken in to account.
ts2950/a 150ma ultra low dropout voltage regulator 3/10 version: d11 application hints external capacitors for the stability of the ts2950/a is requires a 1.0 uf(0.22uf is recommended for 3.0v & 3.3v) or greate r capacitor between output and ground. oscillation could occur without this capacitor. the tantalum or aluminum el ectrolytic works fine; could use the film type work but are no t cost efficient. for the operation of below -25 o c solid tantalum is recommended since the many aluminum type have elect rolytes the freeze at about -30 o c. the esr of about 5 or less and resonant frequency above 500khz are most i mportant parameter in the value of capacitor. the capacitors value can be increased without any limit . at lower values of output current, less output ca pacitance is required for stability. for the currents below 10ma the value of capacitor can be reduce to 0.33uf and 0.1uf for 1ma. the ts2950/a is not like other low dropout regulato rs will remain stable and regulation with no load i n addition to the internal voltage divider. this feature very imp ortant in application, it is like cmos ram keep-ali ve. if at the input of ts2950/a connected to battery or between ac filter capacitor and input is 10 inches wire then 1uf tantalum or aluminum electrolytic capacitor should be connected between input and ground. this could c ause more problems when using higher value of external to set the output voltage. to fix this problem increasing output capacitance to 3.3uf. reducing output noise it could be an advantage to reduce the ac noise pre sent at the output. one method is to reduce the reg ulator bandwidth by increasing the value of the output cap acitor. this is the only method that noise could re duce on the ts2950/a, but is relatively inefficient, as increas ing capacitor from 1uf to 220uf only decreases the noise from 430uv to 160uvrms for a 100khz bandwidth at 5v outp ut. the output capacitor must be increased to 3.3uf to maintain stability. these change the output noise f rom 430uv/rms for a 100 khz bandwidth 5v, 3.3v & 3v out put. block diagram and typical applications circuit
ts2950/a 150ma ultra low dropout voltage regulator 4/10 version: d11 electrical characteristics curve (ta = 25 o c, unless otherwise noted) figure 1. line regulation vs. input voltage figure 2. load regulation vs. output current figure 3. ground pin current vs. output current figure 4. ground pin current vs. input voltage figure 5. dropout voltage vs. output current figure 6. load transient response
ts2950/a 150ma ultra low dropout voltage regulator 5/10 version: d11 to-252 mechanical drawing marking diagram xx = voltage code ( 50 = 5.0v, 33 = 3.3v, 30 = 3.0v) y = year code m = month code ( a =jan, b =feb, c =mar, d =apl, e =may, f =jun, g =jul, h =aug, i =sep, j =oct, k =nov, l =dec) l = lot code
ts2950/a 150ma ultra low dropout voltage regulator 6/10 version: d11 to-92 mechanical drawing marking diagram xx = voltage code ( 50 = 5.0v, 33 = 3.3v, 30 = 3.0v) y = year code m = month code ( a =jan, b =feb, c =mar, d =apl, e =may, f =jun, g =jul, h =aug, i =sep, j =oct, k =nov, l =dec) l = lot code to-92 dimension dim millimeters inches min max min max a 4.30 4.70 0.169 0.185 b 4.30 4.70 0.169 0.185 c 12.70 15.49 0.500 0.609 d 0.39 0.49 0.015 0.019 e 1.18 1.28 0.046 0.050 f 3.30 3.70 0.130 0.146 g 1.27 1.31 0.050 0.051 h 0.33 0.43 0.013 0.017
ts2950/a 150ma ultra low dropout voltage regulator 7/10 version: d11 notice specifications of the products displayed herein are subject to change without notice. tsc or anyone on its behalf, assumes no responsibility or liability for any erro rs or inaccuracies. information contained herein is intended to provide a product description only. no license, express or implied, to any intellectual property rights is granted by this document. except as provided in tscs terms and co nditions of sale for such products, tsc assumes no liability wh atsoever, and disclaims any express or implied warr anty, relating to sale and/or use of tsc products includi ng liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, cop yright, or other intellectual property right. the products shown herein are not designed for use in medical, life-saving, or life-sustaining applica tions. customers using or selling these products for use i n such applications do so at their own risk and agr ee to fully indemnify tsc for any damages resulting from such i mproper use or sale.
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