ts5215 series 1-1 2006/01 rev. c pin assignment sot-25 sot-89-5l sop-8 pin configuration pin description 3 3 1 enable ttl/coms compatible input. logic high is enable; logic low or open is shutdown 1 4 2 input unregulated input: +16v maximum supply 2 2 5,6,7,8 ground ground: ground pin and tab/heatsink are internally connected. 5 5 3 output regulator output by pass (fixed voltage) a 470uf capacitor (cbypass) connected from bypass to ground quiets this reference 4 1 4 feed back (adjustable) adjustment input: feedback input. connect to resistive voltage-divider network. (vout<8v) ts5215 300ma low noise ldo voltage regulator with enable low power consumption low drop out voltage 0.35v fixed and adjustable output enable shutdown general description the ts5215 series is an efficient linear vo ltage regulator with ultra low noise out put, very low dropout voltage (typically 17mv at light loads and 350mv at 300ma) , and very low power consumption ( 125ua at 100ua), prov iding high output current even when the application require s very low dropout voltage. the chip enable (ce) includes a cmos or ttl compatible input allows the output to be turned off to prolong battery life. when shutdown, power consumption drops nearly to zero. the ts5215 series is included a precision voltage reference, error correction ci rcuit, a current limited output driver, over temperature shutdown, revered battery protection and a reference by pass pin to improve its already excellent low-noise performance. the ts5215 series is available in fixed and adjustabl e output voltage version in sot-25, sot-89-5l and sop-8 package. features ultra low noise output. low dropout voltage low power consumption ?zero? off-mode current logic controlled electronic enable internal current limit and thermal shutdown protection applications cellular telephones palmtops, notebook computers battery powered equipment consumer and personal electronics smps post regulator and dc to dc modules high-efficiency linear power supplies ordering information note: where xx denotes voltage opti on, available are 50 = 5.0v 33 = 3.3v 30 = 3.0v 25 = 2.5v. leave blank for adjustable version. contact factory for additional voltage options. part no. operating temp. package TS5215CS xx sop-8 ts5215cy5 xx sot-89-5l ts5215cx5 xx -40 ~ +125 o c sot-25
ts5215 series 2-2 2006/01 rev. c absolute maximum rating (note 1) input supply voltage vin -20~ +20 v enable input voltage vce -20~ +20 v output current io 500 ma power dissipation (note 2) p d internal limited sot-23 220 sot-89-5l 110 thermal resistance sop-8 ? ja 55 o c/w operating junction temper ature range tj -40 ~ +125 o c storage temperature range t stg -65 ~ +150 o c lead soldering temperature (260 o c) 5 s recommend operating rating (note 3) input supply voltage vin +2.5 ~ +16 v enable input voltage vce 0 ~ vin v electrical characteristics vin=vo+1v, io=1ma, cout=1uf, vce 2v, tj = 25 o c, unless otherwise specified. parameter conditions min typ max unit output voltage vin=vo + 1v 0.98|vo| vout 1.02|vo| v output voltage temp. coefficient (note 4) -- 40 -- ppm/ o c line regulation vo+1v vin 16v -- 0.005 0.05 %/v load regulation (note 5) 1ma io 300ma -- 0.02 0.2 %/v io=100ua -- 17 50 io=150ma -- 200 300 dropout voltage (note 6) io=300ma -- 350 600 mv quiescent current vin 0.4v (shutdown) vin 0.18v (shutdown) -- -- 0.01 -- 1 5 ua io=100ua -- 80 125 io=150ma -- 600 1500 ground pin current (note 7) vce 2v io=300ma -- 1900 2500 ua output current limit vout=0v -- 550 600 ma power supply rejection ratio at f=100hz, io=100ua, -- 75 -- db thermal regulation (note 8) -- 0.05 -- %/w output noise io=50ma, co=2.2uf, 470pf from bypass to ground -- 260 -- nv hz enable function enable input logic-low voltage r egulation shutdown -- -- 0.4 v enable input logic-high voltage regulation enable 2.0 -- -- v v il 0.4v -- 0.01 -1 enable input current v ih 2.0 v -- 5 20 ua
ts5215 series 3-3 2006/01 rev. c electrical characteristics (continued) note 1: exceeding the absolute ma ximum rating may damage the device. note 2: the maximum allowable power dissipation at any ta is pd(max) = [ tj(max) - ta] + ? ja. exceeding the maximum allowable power dissipation will result in exce ssive die temperature, and the regulator will go into thermal shutdown. note 3: the device is not guaranteed to function outside it s operating rating. note 4: output voltage tem perature coefficient is defi ned as the worst case voltage change divided by the total temperature range. note 5: regulation is measur ed at constant junction temper ature using low duty cycle pulse testing. parts are tested for load regulation in the load range from 1ma to 300ma. changes in output vo ltage due to heating effects are covered by the thermal regulation spec ification. note 6: dropout voltage is defined as t he input to output differential at whic h the output voltage dr ops 2% below its nominal value measured at 1v differential. note 7: ground pin current is the regul ator quiescent current plus pass trans istor base current. the total current drawn from the supply is the sum of t he load current plus the ground pin current. note 8: thermal regulation is defined as the change in output volt age at a time ?t? after a change in power dissipation is applied, excluding load or line regul ation effects. specific ations are for a 300ma load pulse at vin=16v for t=10ms. block diagrams vout(max) < 8v
ts5215 series 4-4 2006/01 rev. c application information enable input ts5215 series feature an active-high (>2v) enable (en) input that allows on/off control of the regulator. current drain reduces to ?zero? when the device is shutdown, with only micro- amperes of leakage current. the en is compatible with cmos logic interfacing. en may be directly tied to vin and pulled up to the maximum supply voltage. input capacitor requirement an input capacitor of 1uf or greater is recommended when the device is more t han 10? away from the bulk ac supply capacitance or when the supply is a battery. reference bypass capacitor bypass is connected to the in ternal voltage reference. a 470uf capacitor (cbypass) connected from bypass to ground quiets this reference, providing a significant reduction in output noise. cbypass reduces the regulator phase margin; w hen using cbypass, output capacitors of 2.2uf or great er are generally required to maintain stability. the star up speed of the ts5215 is inversely proportional to the size of the reference bypass capacitor. applications r equiring a slow ramp up of output voltage should consi der larger values of cbypass. likewise, if rapid turn on is necessary, consider omitting cbypass. if output noise is not a major concern, omitted cbypass and leave bypass open. output capacitor requirement the ts5215 series requires an output capacitor to maintain stability and improv e transient response is necessary. the value of this capacitor is dependent upon whether a reference by pass capacitor is used. 1uf minimum is recommended when cbypass is not used. 2.2uf minimum is recommended when cbypass is 470uf. larger values im prove the regulator?s transient response. the out put capacitor value may be increased without limit. the output capacitor shoul d have an esr (effective series resistance) less than 5 ? and a resonant frequency above 1mhz. ultra low esr capacitors can cause a low amplitude osc illation on the output and/or under damped transient response. most of tantalum or alumi num electrolytic capacitors are adequate; film types will work. since many aluminum electrolytic have el ectrolytes that freeze at about ?30 o c, solid tantalums are recommended for operation below ?25 o c. at lower values of output current, less output capacitanc e is required for output stability. the capacitor c an be reduced to 0.47uf for current below 10ma or 0.33uf for currents below 1ma. no load stability the ts5215 series will remain stable and in regulation with no load, unlike many other voltage regulators. this is especially important in cmos ram keep alive applications. adjustable regulator design the adjustable regulator vers ions can be adjusted to a specific output voltage by us ing two external resistors to programming the output voltage anywhere between 1.25 and the 8v maximum operating rating of the family. two resistors are used. re sistors can be quite large up to 470k ? , because of the very high input impedance and low bias cu rrent of the sense comparator, the resistor values are calculated by: vout = 1.23v * (r2 / r1 + 1) a capacitor from adj to ground provides greatly improved noise performance. dual supply operation when used in dual supply syst ems where the regulator load is returned to a negat ive supply, the output voltage must be diode clamped to ground.
ts5215 series 5-5 2006/01 rev. c application information (continues) thermal characteristics ts5215 series is designed to provide 300ma of continuous current in a very small package. maximum power dissipation can be calculated based on the output current and the volt age drop across the part. to determine the maximum pow er dissipation of the package, use the junction-am bient thermal resistance of the device and the fo llowing basic equation: pd(max) = [ tj(max) ? ta ] / ja tj(max) is the maximum j unction temperature of the die(125 o c), and ta is the ambient operating temperature. ja is layout dependent, the actual power dissipation of the regulator circuit can be determined using the equation: pd = ( vin ? vout ) * iout + vin * ignd substituting pd(max) for pd and solving for the operating conditions that are critical to the application will give the maximum operating conditions for the regulator circuit. for ex ample, when operating the ts5215cx533 at room temperature with a minimum footprint layout, the maximum input voltage for a set output current can be determined as follows: pd(max) = (125 o c ? 25 o c) / 220 o c/w pd(max) = 455mw the junction to ambient thermal resistance for the minimum footprint is 220 o c/w, the maximum power dissipation must not be ex ceeded for proper operation. using the output vo ltage of 3.3v and an output current of 300ma, the maximu m input voltage can be determined. form the electrical characteristics table, the maximum ground current for 300ma output current is 2.5ma. 445mw = ( vin ? 3.3v ) * 300ma + vin * 2.5ma 445mw = vin * 300ma ? 3.3 * 300ma + vin * 2.5ma 445mw = vin * 300ma ? 990mw + vin * 2.5ma 1435mw = vin * 302.5ma vin(max) = 4.74v therefore, a 3.3v applic ation at 300ma of output current can accept a maxi mum input voltage of 4.74v in a sot-25 package. fixed output regulator application ultra low noise fixed voltage application includes a 470uf capacitor for low noise operation and shows en connected to in for an application where enable/shutdown is not r equired. cout= 2.2uf minimum. low noise fixed voltage application an example of a low noise configuration where cbypass is not required. cout= 1uf minimum reference voltage output application an example of reference vo ltage (1.23v) as the output voltage when adjustable pin connect to output.
ts5215 series 6-6 2006/01 rev. c sot-25 mechanical drawing sot-25 dimension millimeters inches dim min max min max a 2.70 3.00 0.106 0.118 b 0.25 0.50 0.010 0.020 c 1.90(typ) 0.075(typ) d 0.95(typ) 0.037(typ) e 1.50 1.70 0.059 0.067 f 1.05 1.35 0.041 0.053 h 2.60 3.00 0.102 0.118 l 0.60(typ) 0.024(typ) sot-89-5l mechanical drawing sot-89-5l dimension millimeters inches dim min max min max a 4.40 4.60 0.17 0.18 b 4.05 4.25 0.16 0.17 c 1.50 1.70 0.06 0.07 d 0.35 0.41 0.01 0.02 e 2.40 2.60 0.09 0.10 f 0.80 -- 0.03 -- g 3.00(typ) 0.12(typ) h 1.50(typ) 0.06(typ) i 0.40 0.52 0.01 0.02 j 1.40 1.60 0.05 0.06
ts5215 series 7-7 2006/01 rev. c sop-8 mechanical drawing c p b d k g 1 8 a 16 9 r m f sop-8 dimension millimeters inches dim min max min max a 4.80 5.00 0.189 0.196 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 (typ) 0.05 (typ) k 0.10 0.25 0.004 0.009 m 0 o 7 o 0 o 7 o p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019
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