ts9008 300ma high psrr low noise cmos ldo 1/9 version: e14 sot - 25 sot - 23 general description the ts9008 is a low dropout, high psrr, low noise l inear regulator with very low quiescent. it can sup ply 300ma output current with low dropout about 250mv. the device includes pass element, error amplifier, band- gap, current-limit and thermal shutdown circuitry. the characteristics of low dropout voltage and less quiescent current make it good for some critical current appl ication, for example, some battery powered devices. the typical quiescent current is approximately 30a. in the shutdown mode, the maximum supply current is l ess than 1ua. built-in current-limit and thermal-shutdo wn functions prevent any fault condition from ic da mage features input voltage range 2.8v~5.5v 250mv dropout at 300ma load 300ma output current low quiescent current 30a (typ.) max. supply current <1a at shutdown mode fixed output voltage current limit and thermal shutdown protection high psrr 73db @ 1khz ordering information note: g denote for halogen free product where x denotes voltage option, available are d = 1.8v, s = 3.3v part no. package packing ts9008 x cx rfg sot-23 3kpcs / 7 reel ts9008 x cx5 rfg sot-25 3kpcs / 7 reel applications palmtops, pda and notebook computers dsc, handset camera modules pcmcia cards, pc cameras usb based portable devices (mps, pmp) gsm/gprs/3g rf transceiver modules block diagram current limit - + vin vout gnd error amp bandgap thermal shutdown enable bp en typical application circuit pin definition : 1. input 2. ground 3. enable 4. bypass 5. output ts9008 pin definition : 1. input 2. output 3. ground
ts9008 300ma high psrr low noise cmos ldo 2/9 version: e14 absolute maximum ratings parameter symbol limit unit vin pin voltage v in gnd - 0.3 to gnd + 6 v output voltage v out gnd - 0.3 to vin + 0.3 v enable voltage v en gnd - 0.3 to gnd + 6 v power dissipation p d 350 mw storage temperature range t stg -40 to +150 c operating temperature range t op -40 to +85 c junction temperature t j -40 to +125 c thermal resistance from junction to case r jc 230 c/w thermal resistance from junction to ambient r ja 280 c/w note: r ja is measured with the pcb copper area of approximat ely 1 in 2 (multi-layer). electrical characteristics (v in =v out +1v or v in =2.8v whichever is greater, c in =c out =1uf, t a =25c, unless otherwise noted) characteristics symbol conditions min typ max units input voltage v in (note1) 2.8 -- 5.5 v output voltage accuracy ? v out i out =1ma -2 -- +2 % quiescent current i q i out =0ma -- 30 60 a dropout voltage (note2) v drop i out =300ma 1.5v v out Q 2.0v -- 1000 -- mv 2.8v v out Q 3.3v -- 250 -- current limit i limit r load =1 ? 300 -- -- ma line regulation ? v line i out =1ma, v in =v out +1v to 5v -- 1 5 mv load regulation (note3) ? v load i out =0m~150ma -- 6 20 mv ripple rejection psrr c out =1uf, i out =1ma f=1khz -- 73 -- db f=10k -- 60 -- enable input threshold v enh 1.4 -- -- v v enl -- -- 0.4 enable pin current i eh v en =v in -- -- 0.1 a shutdown current i sd v in =3.6v, v en =0v -- -- 1 a temperature coefficient t c i out =1ma, v in =5v -- 50 -- ppm/c temperature shutdown t s -- 160 -- oc temperature shutdown hysterisis t sh -- 25 -- oc note: 1. minimum v in voltage is defined by output adds a dropout voltag e. 2. the dropout voltage is defined as v in -v out , which is measured when v out drop about 100mv. 3. regulation is measured at constant junction temp erature by using pulsed testing with a low on time.
ts9008 300ma high psrr low noise cmos ldo 3/9 version: e14 function description a minimum of 1uf capacitor must be connected from v out to ground to insure stability. typically a large s torage capacitor is connected from v in to ground to ensure that the input voltage does no t sag below the minimum dropout voltage during the load transient response. this pi n must always be dropout voltage higher than v out in order for the device to regulate properly application information like any low-dropout regulator, the ts9008 requires input and output decoupling capacitors. the device is specifically designed for portable applications req uiring minimum board space and smallest components. these capacitors must be correctly selected for good perf ormance. please note that linear regulators with a low dropout voltage have high internal loop gains which require care in guarding against oscillation caused by ins ufficient decoupling capacitance. capacitor selection normally, use a 1f capacitor on the input and a 1 f capacitor on the output of the ts9008. larger inp ut capacitor values and lower esr provide better supply-noise re jection and transient response. a large value outpu t capacitor may be necessary if large, fast transients are anti cipated and the device is located several inches fr om the power source. the capacitors is recommended to use 1uf x5 r or x7r dielectric ceramic capacitors with 30m ? to 50m ? esr range between device outputs to ground for tran sient stability. input-output (dropout) voltage a regulator's minimum input-to-output voltage diffe rential (dropout voltage) determines the lowest usa ble supply voltage. in battery-powered systems, this determine s the useful end-of-life battery voltage. because t he device uses a pmos, its dropout voltage is a function of d rain-to source on-resistance, rds(on), multiplied b y the load current: v dropout = v in -v out = r ds (on) x i out current limit and thermal shutdown protection in order to prevent overloading or thermal conditio n from damaging the device, ts9008 regulator has in ternal thermal and current limiting functions designed to protect the device. it will rapidly shut off pmos p ass element during overloading or over temperature condition. thermal considerations the ts9008 series can deliver a current of up to 30 0ma over the full operating junction temperature ra nge. however, the maximum output current must be dated a t higher ambient temperature to ensure the junction temperature does not exceed 125c. with all possibl e conditions, the junction temperature must be with in the range specified under operating conditions. power d issipation can be calculated based on the output cu rrent and the voltage drop across regulator. p d = (v in - v out ) i out the final operating junction temperature for any se t of conditions can be estimated by the following t hermal equation: p d (max) = (t j(max) - t a ) / r ja where t j(max) is the maximum junction temperature of the die (12 5c) and ta is the maximum ambient temperature. the junction to ambient thermal resist ance (r ja ) for sot-25 package at recommended minimum footprint is 250c/w.
ts9008 300ma high psrr low noise cmos ldo 4/9 version: e14 pcb layout an input capacitance 1f is required between the ts 9008 input pin and ground (the amount of the capaci tance may be increased without limit), this capacitor mus t be located a distance of not more than 1cm from t he input and return to a clean analog ground. input capacitor ca n filter out the input voltage spike caused by the surge current due to the inductive effect of the package pin and the printed circuit boards routing wire. otherwise , the actual voltage at the vin pin may exceed the absolute maxi mum rating. the output capacitor also must be locat ed a distance of not more than 1cm from output to a clea n analog ground. because it can filter out the outp ut spike caused by the surge current due to the inductive ef fect of the package pin and the printed circuit boa rds routing wire.
ts9008 300ma high psrr low noise cmos ldo 5/9 version: e14 electrical characteristics curve figure 1. output voltage vs. input voltage figure 2. threshold voltage vs. input voltage figure 3. quiescent current vs. input voltage figure 4. output current vs. output voltage figure 5. output voltage vs. temperature figure 6. load transient response
ts9008 300ma high psrr low noise cmos ldo 6/9 version: e14 electrical characteristics curve figure 7. power on figure 8. enable on
ts9008 300ma high psrr low noise cmos ldo 7/9 version: e14 sot-23 mechanical drawing unit: millimeters marking diagram ll = device code bd=1.8v bh=3.3v y = year code 4=2014, 5=2015, 6=2016.. w = week code 01~26 (a~z) 27~52 (a~z) x = interal code
ts9008 300ma high psrr low noise cmos ldo 8/9 version: e14 sot-25 mechanical drawing unit: millimeters marking diagram ll = device code ud=1.8v ui=3.3v y = year code 4=2014, 5=2015, 6=2016.. w = week code 01~26 (a~z) 27~52 (a~z) x = interal code
ts9008 300ma high psrr low noise cmos ldo 9/9 version: e14 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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