rt9010 1 ds9010-03 august 2007 www.richtek.com pin configurations ordering information marking information for marking information, contact our sales representative directly or through a richtek distributor located in your area, otherwise visit our website for detail. 300ma ldo regulator with por (top view) general description rt9010 is a low noise, and low dropout with the sourcing ability up to 300ma and power-on reset function. the range of output voltage is from 1.2v to 3.6v by operating from 2.5v to 5.5v input. rt9010 offers 2% accuracy, extremely low dropout voltage (240mv @ 300ma), and extremely low ground current. the shutdown current is near zero current which is suitable for battery-power devices. other features include current limiting, over temperature, output short circuit protection. rt9010 is short circuit thermal folded back protected. rt9010 lowers its otp trip point from 165 c to 110 c when output short circuit occurs (v out < 0.4v) providing maximum safety to end users. rt9010 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. rt9010 is available in fixed output voltages in the tsot-23-6 package. features z z z z z wide operating voltage ranges : 2.5v to 5.5v z z z z z low-noise for rf application z z z z z no noise bypass capacitor required z z z z z fast response in line/load transient z z z z z ttl-logic-controlled shutdown input z z z z z low temperature coefficient z z z z z 300ma ldo outputs z z z z z high accuracy 2% z z z z z short circuit protection z z z z z thermal shutdown protection z z z z z current limit protection z z z z z short circuit thermal folded back protection z z z z z tiny tsot-23-6 package z z z z z rohs compliant and 100% lead (pb)-free applications z cdma/gsm cellular handsets z battery-powered equipment z laptop, palmtops, notebook computers z hand-held instruments z pcmcia cards z portable information appliances note : richtek pb-free and green products are : ` rohs compliant and compatible with the current require- ments of ipc/jedec j-std-020. ` suitable for use in snpb or pb-free soldering processes. ` 100% matte tin (sn) plating. tsot-23-6 vin en set vout gnd 4 23 5 6 1 por note : there is no pin1 indicator on top mark for tsot-23-6 type, and pin 1 will be lower left pin when reading top mark from left to right. rt9010- package type j6 : tsot-23-6 operating temperature range p : pb free with commercial standard g : green (halogen free with commer- cial standard) output voltage 12 : 1.20v 13 : 1.30v : : 35 : 3.50v 36 : 3.60v 1h : 1.85v 2f : 2.65v 2h : 2.85v
rt9010 2 ds9010-03 august 2007 www.richtek.com functional pin description function block diagram pin no. pin name pin function 1 vout output voltage. 2 gnd common ground. 3 por power-on reset output : open-drain output. active low indicates an output under voltage condition on regulator. 4 set delay set input. connect external capacitor to gnd to set the internal delay. 5 en chip enable (active high). 6 vin supply input voltage. typical application circuit en vout rt9010 gnd vin 1uf v out 1uf v in por chip enable 100k set c delay 42 3 5 6 1 por en current limit and thermal protection mos driver + - vout shutdown and logic control vin error amplifier v ref gnd por & delay set 0.2ua
rt9010 3 ds9010-03 august 2007 www.richtek.com electrical characteristics recommended operating conditions (note 3) z supply input v oltage ------------------------------------------------------------------------------------------------------ 2.5v to 5.5v z enable input v oltage ------------------------------------------------------------------------------------------------------ 0v to 5.5v z junction temperature range -------------------------------------------------------------------------------------------- ? 40 c to 125 c z ambient temperature range -------------------------------------------------------------------------------------------- ? 40 c to 85 c absolute maximum rating s (note 1) z supply input voltage ------------------------------------------------------------------------------------------------------ ? 0.3v to 6v z other i/o pin v oltages --------------------------------------------------------------------------------------------------- ? 0.3v to 6v z power dissipation, p d @ t a = 25 c tsot-23-6 ------------------------------------------------------------------------------------------------------------------- 0.455w z package thermal resistance (note 4) tsot-23-6 , ja ------------------------------------------------------------------------------------------------------------- 220 c/w z lead temperature (soldering, 10 se c.) ------------------------------------------------------------------------------- 260 c z junction temperature ----------------------------------------------------------------------------------------------------- 150 c z storage temperature range -------------------------------------------------------------------------------------------- ? 65 c to 150 c z esd susceptibility (note 2) hbm (human body mode) ---------------------------------------------------------------------------------------------- 2kv mm (ma chine mode) ------------------------------------------------------------------------------------------------------ 200v (v in = v out + 1v, v en = v in , c in = c out = 1 f, t a = 25 c, unless otherwise specified.) parameter symbol test conditions min typ max units input voltage v in v in = 2.5v to 5.5v 2.5 -- 5.5 v i out = 150ma, v out > 2.8v -- 120 -- mv dropout voltage (note 5) v drop i out = 300ma, v out > 2.8v -- 240 -- mv output voltage range v out 1.2 -- 3.6 v output voltage accuracy v out i out = 1ma ? 2 -- +2 % line regulation v line v in = (v out + 0.3v) to 5.5v or v in > 2.5v, whichever is larger -- -- 0.2 %/v load regulation v load 1ma < i out < 300ma -- -- 0.6 % current limit i lim r load = 1 330 450 700 ma quiescent current i q v en > 1.5v -- 58 80 a shutdown current i q_sd v en < 0.4v -- -- 1 a logic-high v ih v in = 2.5v to 5.5v, power on 1.5 -- -- en threshold voltage logic-low v il v in = 2.5v to 5.5v, shutdown -- -- 0.4 v output voltage tc -- 100 -- ppm/ c thermal shutdown t sd -- 170 -- c thermal shutdown hysteresis t sd -- 40 -- c to be continued
rt9010 4 ds9010-03 august 2007 www.richtek.com note 1. stresses listed as the above "absolute maximum ratings" may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. note 2. devices are esd sensitive. handling precaution recommended. note 3. the device is not guaranteed to function outside its operating conditions. note 4. ja is measured in the natural convection at t a = 25 c on a low effective thermal conductivity test board of jedec 51-3 thermal measurement standard. note 5. the dropout voltage is defined as v in -v out , which is measured when v out is v out(normal) ? 100mv. parameter symbol test conditions min typ max units f =100hz -- ? 65 -- db f =1khz -- ? 60 -- db psrr loading=10ma psrr f =10khz -- ? 50 -- db f =100hz -- ? 65 -- db f =1khz -- ? 50 -- db psrr loading=150ma psrr f =10khz -- ? 50 -- db v thl low threshold, % of nominal v out (flag on) 90 -- -- % reset threshold v thh high threshold, % of nominal v out (flag off) -- -- 96 % por output logic low voltage v por_l i l = 250 a -- 0.02 0.1 v por leakage current i por flag off ? 1 0.01 1 a set pin current source v set = 0 0.60 1.25 1.70 a set pin threshold por = high -- 1.4 -- v
rt9010 5 ds9010-03 august 2007 www.richtek.com typical operating characteristics output voltage vs. temperature 1.7 1.75 1.8 1.85 1.9 -50 -25 0 25 50 75 100 125 temperature output voltage (v) rt9010-18 ( c) output voltage vs. temperature 3.2 3.25 3.3 3.35 3.4 -50 -25 0 25 50 75 100 125 temperature output voltage (v) rt9010-33 ( c) dropout voltage vs. load current 0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 load current (ma) dropout voltage (mv) rt9010-33 t j = 25 c t j = -40 c t j = 125 c quiescent current vs. temperature 50 55 60 65 70 -50 -25 0 25 50 75 100 125 temperature quiescent current (ua) rt9010-33 v in = v en = 4.3v c in = c out 1uf/x7r ( c) por delay 0.01 0.1 1 10 100 1000 10000 0.0001 0.0010 0.0100 0.1000 1.0000 por setting capacitance (uf) por delay time (ms) rt9010-28 0.0001 0.001 0.01 0.1 1 psrr -80 -60 -40 -20 0 20 10 100 1000 10000 100000 1000000 frequency (hz) psrr (db) i load = 100ma i load = 10ma i load = 50ma rt9010-15 v in = 4.3v 0.1v c in = c out 1uf/x7r 0.01 0.1 1 10k 100k 1000k (hz)
rt9010 6 ds9010-03 august 2007 www.richtek.com load transient response time (250 s/div) i out (50ma/div) v out (20mv/div) rt9010-33, i load = 10ma to 50ma v in = v en = 4.3v c in = c out = 1uf/x7r load transient response time (250 s/div) i out (100ma/div) v out (20mv/div) rt9010-33, i load = 10ma to 100ma v in = v en = 4.3v c in = c out = 1uf/x7r rt9010-28, both i load = 100ma v in = 3.8v to 4.8v line transient response time (100 s/div) v out (10mv/div) 4.8 3.8 v in (v) rt9010-28, both i load = 50ma v in = 3.8v to 4.8v line transient response time (100 s/div) 4.8 3.8 v out (10mv/div) v in (v) rt9010-28, both i load = 1ma v in = 3.8v to 4.8v line transient response v in (v) time (100 s/div) 4.8 3.8 v out (10mv/div) rt9010-28, both i load = 10ma v in = 3.8v to 4.8v line transient response v in (v) time (100 s/div) 4.8 3.8 v out (10mv/div)
rt9010 7 ds9010-03 august 2007 www.richtek.com start up time (5 s/div) rt9010-28, v in = 5v i out = 50ma (5v/div) (1v/div) v en v out power-on time (10 s/div) rt9010-28 i load = 10ma v en (5v/div) v out (2v/div) por (5v/div) noise time (10ms/div) rt9010-33, no load v in = v en = 4.5v(by battery) c in = c out = 1uf/x7r noise ( v/div) 150 100 50 0 -50 -100 -150 en pin shutdown response time (50 s/div) rt9010-28, v in = 5v i out = 50ma (5v/div) (1v/div) v en v out time (10ms/div) rt9010-33, i load = 50ma v in = v en = 4.5v(by battery) c in = c out = 1uf/x7r noise ( v/div) 300 200 100 0 -100 -200 -300 noise
rt9010 8 ds9010-03 august 2007 www.richtek.com applications information like any low-dropout regulator, the external capacitors used with the rt9010 must be carefully selected for regulator stability and performance. using a capacitor whose value is > 1 f on the rt9010 input and the amount of capacitance can be increased without limit. the input capacitor must be located a distance of not more than 0.5 inch from the input pin of the ic and returned to a clean analog ground. any good quality ceramic or tantalum can be used for this capacitor. the capacitor with larger value and lower esr (equivalent series resistance) provides better psrr and line-transient response. the output capacitor must meet both requirements for minimum amount of capacitance and esr in all ldos application. the rt9010 is designed specifically to work with low esr ceramic output capacitor in space-saving and performance consideration. using a ceramic capacitor whose value is at least 1 f with esr is > 20m on the rt9010 output ensures stability. the rt9010 still works well with output capacitor of other types due to the wide stable esr range. figure 1. shows the curves of allowable esr range as a function of load current for various output capacitor values. output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and psrr. the output capacitor should be located not more than 0.5 inch from the vout pin of the rt9010 and returned to a clean analog ground. figure 1. stable cout esr range v out short to gnd 0.4v v out i out tsd otp trip point 170 c 110 c 110 c 80 c ic temperature figure 2. short circuit thermal folded back protection when output short circuit occurs (patent) for continuous operation, do not exceed absolute maximum operation junction temperature 125 c. the power dissipation definition in device is : p d = (v in ? v out ) x i out + v in x i q the maximum power dissipation depends on the thermal resistance of ic package, pcb layout, the rate of surroundings airflow and temperature difference between junction to ambient. the maximum power dissipation can be calculated by following formula : p d(max) = ( t j(max) ? t a ) / ja where t j(max) is the maximum operation junction temperature 125 c, t a is the ambient temperature and the ja is the junction to ambient thermal resistance. thermal considerations thermal protection limits power dissipation in rt9010. when the operation junction temperature exceeds 170 c, the otp circuit starts the thermal shutdown function and turns the pass element off. the pass element turn on again after the junction temperature cools by 40 c. rt9010 lowers its otp trip level from 170 c to 110 c when output short circuit occurs (v out < 0.4v) as shown in figure 2. it limits ic case temperature under 100 c and provides maximum safety to customer while output short circuit occurring. region of stable c out esr vs. load current 0.001 0.01 0.1 1 10 100 0 50 100 150 200 250 300 load current (ma) region of stable c out esr ( ? ) region of stable c out esr ( ) unstable region stable region simulation verify unstable region rt9010-28, v in = 5v c in = 1uf/x7r
rt9010 9 ds9010-03 august 2007 www.richtek.com figure 3. derating curves for rt9010 packages 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0 25 50 75 100 125 ambient temperature power dissipation (w) ( c) tsot-23-6 for recommended operating conditions specification of rt9010, where t j(max) is the maximum junction temperature of the die (125 c) and t a is the operated ambient temperature. the junction to ambient thermal resistance ( ja is layout dependent) for tsot-23-6 package is 220 c/w on the standard jedec 51-3 single-layer thermal test board. the maximum power dissipation at t a = 25 c can be calculated by following formula : p d(max) = ( 125 c - 25 c) / (220 c/w) = 0.455 w for tsot-23-6 packages the maximum power dissipation depends on operating ambient temperature for fixed t j(max) and thermal resistance ja . for rt9010 packages, the figure 3 of de- rating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed.
rt9010 10 ds9010-03 august 2007 www.richtek.com richtek technology corporation headquarter 5f, no. 20, taiyuen street, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5526789 fax: (8863)5526611 richtek technology corporation taipei office (marketing) 8f, no. 137, lane 235, paochiao road, hsintien city taipei county, taiwan, r.o.c. tel: (8862)89191466 fax: (8862)89191465 email: marketing@richtek.com outline dimension tsot-23-6 surface mount package dimensions in millimeters dimensions in inches symbol min max min max a 0.700 1.000 0.028 0.039 a1 0.000 0.100 0.000 0.004 b 1.397 1.803 0.055 0.071 b 0.300 0.559 0.012 0.022 c 2.591 3.000 0.102 0.118 d 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 h 0.080 0.254 0.003 0.010 l 0.300 0.610 0.012 0.024 a a1 e b b d c h l
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