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RT9011 1 ds9011-08 april 2011 www.richtek.com ordering information general description the RT9011 is a dual channel, low noise, and low dropout regulator sourcing up to 300ma at each channel. the range of output voltage is from 1.2v to 3.6v by operating from 2.5v to 5.5v input. the RT9011 offers 2% accuracy, extremely low dropout voltage (240mv @ 300ma), and extremely low ground current, only 27 a per ldo. 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. the RT9011 is short circuit thermal folded back protected. the ic lowers its otp trip point from 165 c to 110 c when output short circuit occurs (vout < 0.4v) providing maximum safety to end users. the RT9011 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. the RT9011 is available in fixed output voltages in the tsot-23-6, wdfn-8l 2x2, wdfn-10l 3x3, wdfn-8l 3x3 and wdfn-6l 1.6x1.6 packages. portable power management 300ma dual ldo regulator features z wide operating voltage ranges : 2.5v to 5.5v z low-noise for rf application z no noise bypass capacitor required z fast response in line/load transient z ttl-logic-controlled shutdown input z low temperature coefficient z z z z z dual ldo outputs (300ma/300ma) z z z z z ultra-low quiescent current 27 a/ldo z z z z z high output 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 and 6-lead/8-lead/10-lead wdfn packages z z z z z rohs compliant and 100% lead (pb)-free applications z z z z z cdma/gsm cellular handsets z z z z z battery-powered equipment z z z z z laptop, palmtops, notebook computers z z z z z hand-held instruments z z z z z pcmcia cards z z z z z portable information appliances marking information for marking information, contact our sales representative directly or through a richtek distributor located in your area. code voltage code voltage code voltage a 3.5 b 1.3 c 1.2 d 1.85 e 2.1 f 1.5 g 1.8 h 2 j 2.5 k 2.6 l 2.7 m 2.8 n 2.85 p 3 q 3.1 r 3.2 s 3.3 t 2.65 v 2.9 w 1.6 x 3.15 y 1.9 available voltage version note : richtek 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. RT9011- package type j6 : tsot-23-6 qw : wdfn-8l 2x2 (w-type) qwa : wdfn-10l 3x3 (w-type) qwb : wdfn-8l 3x3 (w-type) qwc : wdfn-6l 1.6x1.6 (w-type) lead plating system p : pb free g : green (halogen free and pb free) output voltage : vout1/vout2 vout2 > vout1 is recommended
RT9011 2 ds9011-08 april 2011 www.richtek.com functional pin description pin no. pin name pin function tsot-23-6 wdfn-8l 2x2 wdfn-10 l 3x3 wdfn-8l 3x3 wdfn-6l 1.6x1.6 5 1 1 1 1 vin supply input. 4 2 2 2 2 en1 chip enable1 (active high). 3 3 3 3 3 en2 chip enable2 (active high). 2 5, exposed pa d (9) 6, exposed pa d (11) 6, exposed pad (9) 4, expo sed pad (7) gnd common ground. the exposed pad must be soldered to a large pcb and connected to gnd for maximum power dissipation. 1 7 9 5 5 vout2 channel 2 output voltage. 6 8 10 8 6 vout1 channel 1 output voltage. -- 4, 6 4, 5, 7, 8 4, 7 -- nc no internal connection. typical application circuit en1 en2 vout2 vout1 RT9011 gnd vin 1uf v out1 1uf v out2 1uf v in chip enable c in c out1 c out2 pin configurations (top view) wdfn-8l 3x3 vin nc en1 vout1 nc gnd vout2 en2 7 6 5 1 2 3 4 8 gnd 9 wdfn-6l 1.6x1.6 vin en2 vout1 gnd vout2 en1 1 2 3 5 4 6 gnd 7 wdfn-10l 3x3 vin en1 nc nc vout1 vout2 nc gnd nc en2 9 8 7 9 1 2 3 4 5 10 11 gnd wdfn-8l 2x2 vin nc en1 vout1 vout2 nc gnd en2 7 6 5 1 2 3 4 8 gnd 9 tsot-23-6 4 23 5 6 vin en1 vout1 gnd en2 vout2
RT9011 3 ds9011-08 april 2011 www.richtek.com function block diagram en1 current-limit and thermal protection mos driver + - vout1 shutdown and logic control vin error amplifier v ref gnd en2 current-limit and thermal protection mos driver + - vout2 shutdown and logic control error amplifier v ref gnd 0.2ua 0.2ua
RT9011 4 ds9011-08 april 2011 www.richtek.com electrical characteristics parameter symbol test conditions min typ max unit input voltage v in = 2.5v to 5.5v 2.5 -- 5.5 v dropout voltage (note 5) v drop i ou t = 300ma -- 240 330 mv output voltage range v out 1.2 -- 3.6 v v out accuracy v i ou t = 1ma to 300ma ? 3 -- +3 % 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 ou t < 300ma -- -- 0.6 % current limit 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 v ih v in = 2.5v to 5.5v, power on 1.5 -- -- en threshold v il v in = 2.5v to 5.5v, shutdown -- -- 0.4 v (v in = v out + 1v, v en = v in , c in = c out = 1 f, t a = ? 40 c to 85 c, unless otherwise specified.) to be continued recommended operating conditions (note 4) 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 ratings (note 1) z supply input voltage ------------------------------------------------------------------------------------------------------ ? 0.3v to 7v z other i/o pin v oltages --------------------------------------------------------------------------------------------------- ? 0.3v to 7v z power dissipation, p d @ t a = 25 c tsot-23-6 ------------------------------------------------------------------------------------------------------------------- 0.455w wdfn-8l 2x2 -------------------------------------------------------------------------------------------------------------- 0.606w wdfn-10l 3x3 ------------------------------------------------------------------------------------------------------------- 0.926w wdfn-8l 3x3 -------------------------------------------------------------------------------------------------------------- 0.926w wdfn-6l 1.6x1.6 --------------------------------------------------------------------------------------------------------- 0.571w z package thermal resistance (note 2) tsot-23-6, ja ------------------------------------------------------------------------------------------------------------- 220 c/w wdfn-8l 2x2, ja --------------------------------------------------------------------------------------------------------- 165 c/w wdfn-10l 3x3, ja ------------------------------------------------------------------------------------------------------- 108 c/w wdfn-8l 3x3, ja --------------------------------------------------------------------------------------------------------- 108 c/w wdfn-6l 1.6x1.6, ja ---------------------------------------------------------------------------------------------------- 175 c/w z junction temperature ----------------------------------------------------------------------------------------------------- 150 c z lead temperature (soldering, 10 se c.) ------------------------------------------------------------------------------- 260 c z storage temperature range -------------------------------------------------------------------------------------------- ? 65 c to 150 c z esd susceptibility (note 3) hbm (human body mode) ---------------------------------------------------------------------------------------------- 2kv mm (ma chine mode) ------------------------------------------------------------------------------------------------------ 200v
RT9011 5 ds9011-08 april 2011 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. ja is measured in the natural convection at t a = 25 c on a low effective single layer thermal conductivity test board of jedec 51-3 thermal measurement standard. note 3. devices are esd sensitive. handling precaution recommended. note 4. the device is not guaranteed to function outside its operating conditions. note 5. the dropout voltage is defined as v in -v out , which is measured when v out is v out(normal) ? 100mv. note 6. it is guaranteed by design. parameter symbol test conditions min typ max unit output voltage tc -- 100 -- ppm/ c v ou t discharge resistance in shutdown (note 6) v in = 5v, en1 = en2 = gnd -- 3 -- k en pull low current i en -- 0.2 -- a thermal shutdown t sd -- 170 -- c thermal shutdown hysteresis t sd -- 40 -- c f = 100hz -- 70 -- f = 1khz -- 70 -- f = 10khz -- 70 -- f = 100khz -- 54 -- f = 200khz -- 45 -- psrr v in = v out + 1v, c out = 2.2 f i load = 50ma psrr f = 300khz -- 38 -- db output voltage noise c ou t1 = c out2 = 10uf, 10hz to 100khz, i out1 = i out2 = 1ma -- 100 -- uvrms
RT9011 6 ds9011-08 april 2011 www.richtek.com typical operating characteristics quiescent current vs. temperature 50 55 60 65 70 -50 -25 0 25 50 75 100 125 temperature quiescent current (ua) RT9011-gs v in = v en = 4.3v c in = c out1 = c out2 = 1uf/x7r ( 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) RT9011-gs, v out2 t j = 25 c t j = -40 c t j = 125 c power-on time (10 s/div) RT9011-fm both i load = 10ma v en (5v/div) v out2 (2v/div) v out1 (1v/div) por (5v/div) 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) RT9011-gs, v out1 ( 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) RT9011-gs, v out2 ( c) RT9011-gs, both i load = 1ma v in = 3.8v to 4.8v line transient response v in (v) time (100 s/div) v out1 (10mv/div) 4.8 3.8 v out2 (10mv/div)
RT9011 7 ds9011-08 april 2011 www.richtek.com load transient response time (250 s/div) i out (100ma/div) v out2 (20mv/div) v out1 (20mv/div) RT9011-gs, i load = 10ma to 100ma v in = v en = 4.3v c in = c out1 = c out2 = 1uf/x7r RT9011-gs, both i load = 100ma v in = 3.8v to 4.8v line transient response v in (v) time (100 s/div) v out1 (10mv/div) 4.8 3.8 v out2 (10mv/div) RT9011-gs, both i load = 10ma v in = 3.8v to 4.8v line transient response v in (v) v out1 (10mv/div) 4.8 3.8 v out2 (10mv/div) time (100 s/div) RT9011-gs, both i load = 50ma v in = 3.8v to 4.8v line transient response v in (v) time (100 s/div) v out1 (10mv/div) 4.8 3.8 v out2 (10mv/div) load transient response time (250 s/div) i out (50ma/div) v out2 (20mv/div) v out1 (20mv/div) RT9011-gs, i load = 10ma to 50ma v in = v en = 4.3v c in = c out1 = c out2 = 1uf/x7r start up time (5 s/div) RT9011-fm, v in = 5v i out1 = i out2 = 50ma (5v/div) (1v/div) v en v out1 v out2
RT9011 8 ds9011-08 april 2011 www.richtek.com en pin shutdown response time (50 s/div) RT9011-fm, v in = 5v i out1 = i out2 = 50ma (5v/div) (1v/div) v en v out1 v out2 noise time (10ms/div) RT9011-gs, i load = 50ma v in = v en = 4.5v(by battery) c in = c out1 = c out2 = 1uf/x7r noise ( v/div) 300 200 100 0 -100 -200 -300 noise time (10ms/div) RT9011-gs, no load v in = v en = 4.5v(by battery) c in = c out1 = c out2 = 1uf/x7r noise ( v/div) 150 100 50 0 -50 -100 -150 en2 pin response (1v/div) v en1 v out1 v out2 v en2 v en1 (2v/div) v en2 (2v/div) v en1 (2v/div) (1v/div) v en1 v out1 v out2 en1 pin response v en2 v en2 (2v/div) time (10ms/div) time (10ms/div) psrr -80 -60 -40 -20 0 20 10 100 1000 10000 100000 100000 0 frequency(hz) psrr(db) i out = 50ma psrr 1m 100k 10k 1k
RT9011 9 ds9011-08 april 2011 www.richtek.com applications information like any low-dropout regulator, the external capacitors used with the RT9011 must be carefully selected for regulator stability and performance. using a capacitor whose value is > 1 f on the RT9011 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 RT9011 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 RT9011 output ensures stability. the RT9011 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 RT9011 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) thermal considerations thermal protection limits power dissipation in RT9011. 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 turns on again after the junction temperature cools by 40 c. RT9011 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. 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, t a is the ambient temperature and the ja is the junction to ambient thermal resistance. 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 range stable range simulation verify RT9011-fm, v in = 5v c in = c out1 = c out2 = 1uf/x7r
RT9011 10 ds9011-08 april 2011 www.richtek.com for recommended operating conditions specification of RT9011, the maximum junction temperature is 125 c. the junction to ambient thermal resistance ( ja is layout dependent ) for tsot-23-6 is 220 c/w, wdfn-8l 2x2 is 165 c/w, wdfn-10l 3x3 is 108 c/w, wdfn-8l 3x3 is 108 c/w and wdfn-8l 1.6x1.6 is 175 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) = 0.455w for tsot-23-6 packages p d(max) = ( 125 c ? 25 c ) / (165 c/w) = 0.606w for wdfn-8l 2x2 packages p d(max) = ( 125 c ? 25 c ) / (108 c/w) = 0.926w for wdfn-10l 3x3 packages p d(max) = ( 125 c ? 25 c ) / (108 c/w) = 0.926w for wdfn-8l 3x3 packages p d(max) = ( 125 c ? 25 c ) / (175 c/w) = 0.571w for wdfn-6l 1.6x1.6 packages the maximum power dissipation depends on operating ambient temperature for fixed t j(max) and thermal resistance ja . for RT9011 packages, the figure 3 of de- rating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. figure 3. derating curves for RT9011 packages 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 25 50 75 100 125 ambient temperature (c) power dissipation (w) wdfn-8l 2x2 tsot-23-6 wdfn-8l 3x3 wdfn-10l 3x3 single layer pcb wdfn-6l 1.6x1.6
RT9011 11 ds9011-08 april 2011 www.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
RT9011 12 ds9011-08 april 2011 www.richtek.com w-type 8l dfn 2x2 package dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 1.950 2.050 0.077 0.081 d2 1.000 1.250 0.039 0.049 e 1.950 2.050 0.077 0.081 e2 0.400 0.650 0.016 0.026 e 0.500 0.020 l 0.300 0.400 0.012 0.016 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options d 1 e a3 a a1 d2 e2 l b e see detail a
RT9011 13 ds9011-08 april 2011 www.richtek.com dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.180 0.300 0.007 0.012 d 2.950 3.050 0.116 0.120 d2 2.300 2.650 0.091 0.104 e 2.950 3.050 0.116 0.120 e2 1.500 1.750 0.059 0.069 e 0.500 0.020 l 0.350 0.450 0.014 0.018 w-type 10l dfn 3x3 package 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options d 1 e a3 a a1 d2 e2 l b e see detail a
RT9011 14 ds9011-08 april 2011 www.richtek.com dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 2.950 3.050 0.116 0.120 d2 2.100 2.350 0.083 0.093 e 2.950 3.050 0.116 0.120 e2 1.350 1.600 0.053 0.063 e 0.650 0.026 l 0.425 0.525 0.017 0.021 w-type 8l dfn 3x3 package 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options d 1 e a3 a a1 d2 e2 l b e see detail a
RT9011 15 ds9011-08 april 2011 www.richtek.com information that is provided by richtek technology corporation is believed to be accurate and reliable. richtek reserves the ri ght to make any change in circuit design, specification or other related things if necessary without notice at any time. no third party intellectual property inf ringement of the applications should be guaranteed by users when integrating richtek products into any application. no legal responsibility for any said applications i s assumed by richtek. 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) 5f, no. 95, minchiuan road, hsintien city taipei county, taiwan, r.o.c. tel: (8862)86672399 fax: (8862)86672377 email: marketing@richtek.com dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 1.550 1.650 0.061 0.065 d2 0.950 1.050 0.037 0.041 e 1.550 1.650 0.061 0.065 e2 0.550 0.650 0.022 0.026 e 0.500 0.020 l 0.190 0.290 0.007 0.011 w-type 6l dfn 1.6x1.6 package d 1 e a3 a a1 e b l d2 e2 see detail a 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options

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