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rt9011 preliminary 1 ds9011-05 august 2007 www.richtek.com 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. 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. 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. rt9011 is short circuit thermal folded back protected. rt9011 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. rt9011 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. rt9011 is available in fixed output voltages in the tsot-23-6 a nd wdfn-8l 2x2 package. 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. pin configurations (top view) tsot-23-6 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 8-lead wdfn package 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 4 23 5 6 1 vout2 gnd en2 vin en1 vout1 wdfn-8l 2x2 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. rt9011- package type j6 : tsot-23-6 qw : wdfn-8l 2x2 (w-type) operating temperature range p : pb free with commercial standard g : green (halogen free with commer- cial standard) output voltage : vout1/vout2 cm : 1.20v/2.80v, fm : 1.50v/2.80v gk : 1.80v/2.60v, gs : 1.80v/3.30v jg : 2.50v/1.80v, jm : 2.50v/2.80v jp : 2.50v/3.00v, js : 2.50v/3.30v jn : 2.50v/2.85v, mg : 2.80v/1.80v mm : 2.80v/2.80v, nn : 2.85v/2.85v ms : 2.80v/ 3.30v, pg : 3.00v/1.80v mp : 2.80v/3.00v, pp : 3.00v/3.00v ss : 3.30v/3.30v, sq : 3.30v/3.10v bm : 1.30v/2.80v vin en1 vout1 vout2 nc en2 7 6 5 1 2 3 4 8 nc gnd g n d 9
rt9011 preliminary 2 ds9011-05 august 2007 www.richtek.com functional pin description pin no. rt9011 - pqw rt9011- pj6 pin name pin function 1 5 vin supply input. 2 4 en1 chip enable1 (active high). 3 3 en2 chip enable2 (active high). 5 2 gnd common ground. 7 1 vout2 channel 2 output voltage. 8 6 vout1 channel 1 output voltage. 4, 6 -- nc no internal connection. exposed pad (9) -- gnd the exposed pad must be soldered to a large pcb and connected to gnd for maximum power dissipation. typical application circuit code c b f w g d y h e j k voltage 1.2 1.3 1.5 1.6 1.8 1. 85 1.9 2 2.1 2.5 2.6 code t l m n v p q r s -- -- voltage 2.65 2.7 2.8 2.85 2.9 3 3.1 3.2 3.3 -- -- available voltage version en1 en2 vout2 vout1 rt9011 gnd vin 1uf v out1 1uf v out2 1uf v in chip enable c in c out1 c out2
rt9011 preliminary 3 ds9011-05 august 2007 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 preliminary 4 ds9011-05 august 2007 www.richtek.com electrical characteristics parameter symbol test conditions min typ max units input voltage v in v in = 2.5v to 5.5v 2.5 -- 5.5 v dropout voltage (note 5) v drop i out = 300ma -- 240 330 mv output voltage range v out 1.2 -- 3.6 v v out accuracy v 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 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 output voltage tc -- 100 -- ppm/ c thermal shutdown t sd -- 170 -- c thermal shutdown hysteresis t sd -- 40 -- c (v in = v out + 1v, v en = v in , c in = c out = 1 f, t a = 25 c, unless otherwise specified.) to be continued 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 v oltage ------------------------------------------------------------------------------------------------------ 6v z other i/o pin v oltages --------------------------------------------------------------------------------------------------- 6v z power dissipation, p d @ t a = 25 c tsot23-6 ------------------------------------------------------------------------------------------------------------------- 0 .455w wdfn-6 l 2x2 -------------------------------------------------------------------------------------------------------------- 0.606w z package thermal resistance (note 4) tsot23-6 , ja -------------------------------------------------------------------------------------------------------------- 220 c/w wdfn-6 l 2x2 , ja --------------------------------------------------------------------------------------------------------- 165 c/w z lead temperature (soldering, 10 se c.) ------------------------------------------------------------------------------- 260 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
rt9011 preliminary 5 ds9011-05 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 i load = 10ma psrr f =10khz -- 50 -- db f =100hz -- 65 -- db f =1khz -- 50 -- db psrr i load = 150ma psrr f =10khz -- 50 -- db
rt9011 preliminary 6 ds9011-05 august 2007 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) 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 rt9011-fm, v out1 v in = 4.3v 0.1v c in = c out1 = c out2 = 1uf/x7r 0.01 0.1 1 10k 100k 1000k (hz) 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 preliminary 7 ds9011-05 august 2007 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 = 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-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
rt9011 preliminary 8 ds9011-05 august 2007 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 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 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
rt9011 preliminary 9 ds9011-05 august 2007 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 turn 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 (vout < 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 125 c, 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 rt9014-fm, v in = 5v c in = c out1 = c out2 = 1uf/x7r
rt9011 preliminary 10 ds9011-05 august 2007 www.richtek.com figure 3. derating curves for rt9011 packages for recommended operating conditions specification of rt9011, 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 and wdfn-8l 2x 2 is 165 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 = 0.455 w for tsot-23-6 packages p d(max) = ( 125 c - 25 c ) / 165 = 0.606 w for wdfn-8l 2x2 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. power dissipation vs. ambient temperature 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 25 50 75 100 125 ambient temperature power dissipation (w) ( c) wdfn-8l 2x2 tsot-23-6
rt9011 preliminary 11 ds9011-05 august 2007 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 preliminary 12 ds9011-05 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 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

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