rt9013a 1 ds9013a-02 april 2011 www.richtek.com applications cdma/gsm cellular handsets portable information appliances laptop, palmtops, notebook computers hand-held instruments mini pci & pci-express cards pcmcia & new cards 120ma, low dropout, low noise ultra-fast without bypass capacitor cmos ldo regulator ordering information general description the rt9013a is a high-performance, 120ma ldo regulator, offering extremely high psrr and ultra-low dropout. the chip is ideal for portable rf and wireless applications with demanding performance and space requirements. the rt9013a provides quiescent current to be as low as 25ua to extend the battery life. the rt9013a also works with low-esr ceramic capacitors, reducing the amount of board space necessary for power applications, especially for hand-held wireless devices. the rt9013a consumes typical 0.7ua in shutdown mode and has fast turn-on time less than 40us. the other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. available in the sc-70-5 and sc-82 packages. features wide operating voltage ranges : 2.2v to 5.5v low dropout : 60mv at 120ma ultra-low-noise for rf application ultra-fast response in line/load transient current limiting protection thermal shutdown protection high power supply rejection ratio output only 1uf capacitor required for stability ttl-logic-controlled shutdown input rohs compliant and 100% lead (pb)-free 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. marking information for marking information, contact our sales representative directly or through a richtek distributor located in your area. pin configurations (top view) note : pin2 of sc-82 is wider than other pins. sc-82 vout gnd vin en 43 2 sc-70-5 vout gnd nc vin en 23 54 rt9013a package type u5 : sc-70-5 y : sc-82 lead plating system p : pb free g : green (halogen free and pb free) fixed output voltage 12 : 1.2v 13 : 1.3v : 34 : 3.4v 35 : 3.5v 1b : 1.25v 1h : 1.85v 2h : 2.85v -
rt9013a 2 ds9013a-02 april 2011 www.richtek.com typical application circuit functional pin description pin no. pin name pin function sc-70-5 sc-82 1 4 vin supply input 2 2 gn d common ground 3 1 en enable input logic, active high. when the en goes to a logic low, the device will be shutdown mode. 4 -- nc no internal connection 5 3 vout regulator output function block diagram + - por otp en vin vout gnd mos driver current limit v ref vin gnd vout rt9013a c out 1uf/x7r 1uf/x7r nc en c in v in v out chip enable r pull_down 100k
rt9013a 3 ds9013a-02 april 2011 www.richtek.com absolute maximum ratings (note 1) supply input v oltage ------------------------------------------------------------------------------------------------------ 6v en input voltage ----------------------------------------------------------------------------------------------------------- 6v power dissipation, p d @ t a = 25 c sc-70-5/sc-82 ------------------------------------------------------------------------------------------------------------- 0.3w package thermal resistance (note 2) sc-70-5/sc-82, ja ------------------------------------------------------------------------------------------------------- 333 c/w lead temperature (soldering, 10 sec.) ------------------------------------------------------------------------------- 260 c junction temperature ----------------------------------------------------------------------------------------------------- 150 c storage temperature range -------------------------------------------------------------------------------------------- ? 65 c to 150 c esd susceptibility (note 3) hbm -------------------------------------------------------------------------------------------------------------------------- 2k v mm ---------------------------------------------------------------------------------------------------------------------------- 2 00v recommended operating conditions (note 4) supply input v oltage ------------------------------------------------------------------------------------------------------ 2.2v to 5.5v junction temperature range -------------------------------------------------------------------------------------------- ? 40 c to 125 c ambient temperature range -------------------------------------------------------------------------------------------- ? 40 c to 85 c electrical characteristics parameter symbol test conditions min typ max unit input voltage range v in 2.2 -- 5.5 v output noise voltage v on v out = 1.5v, c out = 1uf, i out = 0ma -- 30 -- uv rms output voltage accuracy (fixed output voltage) v out i out = 10ma ? 2 0 +2 % quiescent current (note 5) i q v en = 5v, i out = 0ma -- 25 50 ua shutdown current i shdn v en = 0v -- 0.7 1.5 ua current limit i lim r load = 0 , 2.2v v in < 5.5v 130 200 300 ma i out = 120ma, 2.2v v out < 3v -- 70 140 dropout voltage (note 6) v drop i out = 120ma, 3v v out 5.5v -- 60 140 mv 1ma < i out < 120ma 2.2v v in < 2.7v -- -- 0.6 load regulation (note 7) (fixed output voltage) v load 1ma < i out < 120ma 2.7v v in 5.5v -- -- 1 % logic-low voltage v il 0 -- 0.6 en threshold logic-high voltage v ih 1.6 -- 5.5 v enable pin current i en -- 0.1 1 ua power supply rejection rate psrr f = 10khz, i out = 100ma -- ? 50 -- db line regulation v li ne v in = (v out +0.5) to 5.5v, i out = 1ma -- 0.01 0.2 %/v (v in = v out + 0.5v, v en = v in , c in = c out = 1uf (ceramic, x7r), t a = 25 c, unless otherwise specified) to be continued
rt9013a 4 ds9013a-02 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 thermal conductivity test board of jedec 51-3 thermal measurement standard. note 3. devices are esd sensitive. handling precaution is recommended. note 4. the device is not guaranteed to function outside its operating conditions. note 5. quiescent, or ground current, is the difference between input and output currents. it is defined by i q = i in - i out under no load condition (i out = 0ma). the total current drawn from the supply is the sum of the load current plus the ground pin current. note 6. the dropout voltage is defined as v in -v out , which is measured when v out is v out(normal) - 100mv. note 7. regulation is measured at constant junction temperature by using a 2ms current pulse. devices are tested for load regulation in the load range from 10ma to 120ma. parameter symbol test conditions min typ max unit thermal shutdown temperature t sd -- 170 -- thermal shutdown hysteresis t sd -- 30 -- c
rt9013a 5 ds9013a-02 april 2011 www.richtek.com typical operating characteristics output voltage vs. temperature 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 1.60 -50 -25 0 25 50 75 100 125 temperature output voltage (v) v in = 2.5v ( c) (c in = c out = 1u/x7r, unless otherwise specified) quiescent current vs. temperature 10 12 14 16 18 20 22 24 26 28 30 -50 -25 0 25 50 75 100 125 temperature quiescent current (ua) v in = 2.5v ( c) dropout voltage vs. load current 0 10 20 30 40 50 60 70 80 90 100 0 20 40 60 80 100 120 load current (ma) dropout voltage (mv) v out = 2.5v 125 c 25 c ? 40 c v in = 2.6v to 3.6v, i load = 10ma line transient response input voltage deviation (v) time (100us/div) output voltage deviation (mv) 3.6 2.6 20 0 -20 v out = 1.5v v in = 2.5v, i load = 75ma start up time (5us/div) en pin voltage (v) output voltage (v) 4 2 0 1.0 0.5 0 v out = 1.5v v in = 2.5v, i load = 50ma en pin shutdown response en pin voltage (v) time (100us/div) output voltage (v) 4 2 0 2 1 0 v out = 1.5v
rt9013a 6 ds9013a-02 april 2011 www.richtek.com line transient response input voltage deviation (v) time (100us/div) output voltage deviation (mv) 3.6 2.6 20 0 -20 v in = 2.6v to 3.6v, i load = 100ma v out = 1.5v v in = 3.0v (by battery), no load noise time (10ms/div) noise ( v/d iv) 300 200 100 0 -100 -200 -300 v out = 1.5v v in = 3.0v (by battery), i load = 10ma noise time (10ms/div) noise ( v/d iv) 300 200 100 0 -100 -200 -300 v out = 1.5v v in = 2.5v, i load = 10ma to 100ma load transient response load current (ma) time (100us/div) output voltage deviation (mv) 100 50 0 50 0 -50 v out = 1.5v psrr -70 -60 -50 -40 -30 -20 -10 0 10 20 10 100 1000 10000 100000 1000000 frequency (hz) psrr(db) i load = 100ma i load = 10ma v in = 2.5v to 2.6v
rt9013a 7 ds9013a-02 april 2011 www.richtek.com applications information like any low-dropout regulator, the external capacitors used with the rt9013a must be carefully selected for regulator stability and performance. using a capacitor whose value is > 1uf / x7r on the rt9013a 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 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 rt9013a 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 1uf with esr is > 20m on the rt9013a output ensures stability. the rt9013a 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 rt9013a and returned to a clean analog ground. ? ? ? ? ? ? = supply error gain log 20 psrr enable the rt9013a goes into sleep mode when the en pin is in a logic low condition. during this condition, the rt9013a has an en pin to turn on or turn off regulator, when the en pin is logic hight, the regulator will be turned on. the supply current to 0.7ua typical. the en pin may be directly tied to v in to keep the part on. the enable input is cmos logic and cannot be left floating. psrr the power supply rejection ratio (psrr) is defined as the gain from the input to output divided by the gain from the supply to the output. the psrr is found to be figure 1 region of stable c out esr vs. load current 0.001 0.01 0.1 1 10 100 0 100 200 300 400 500 load current (ma) note that when heavy load measuring, supply will cause temperature. and temperature will cause output voltage. so the heavy load psrr measuring is include temperature effect. current limit the rt9013a contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 0.2a (typ.). the output can be shorted to ground indefinitely without damaging the part. thermal considerations thermal protection limits power dissipation in rt9013a. 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 30 c. 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 region of stable c out esr ( ) v in = 5v c in = c out = 1uf/x7r stable range unstable range unstable range
rt9013a 8 ds9013a-02 april 2011 www.richtek.com figure 2. derating curves for rt9013a packages 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. for recommended operating conditions specification of rt9013a, 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 for sc-70-5/sc-82 package is 333 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) / 333 c/w = 0.3w for sc-70-5/ sc-82 packages the maximum power dissipation depends on operating ambient temperature for fixed t j(max) and thermal resistance ja . for rt9013a packages, the figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 12.5 25 37.5 50 62.5 75 87.5 100 113 125 ambient temperature power dissipation (w) ( c) single layer pcb sc-70-5/sc-82
rt9013a 9 ds9013a-02 april 2011 www.richtek.com a a1 e b b d c h l sc - 70 - 5 surface mount package dimensions in millimeters dimensions in inches symbol min max min max a 0.800 1.100 0.031 0.044 a1 0.000 0.100 0.000 0.004 b 1.150 1.350 0.045 0.054 b 0.150 0.400 0.006 0.016 c 1.800 2.450 0.071 0.096 d 1.800 2.250 0.071 0.089 e 0.650 0.026 h 0.080 0.260 0.003 0.010 l 0.210 0.460 0.008 0.018 outline dimension
rt9013a 10 ds9013a-02 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 infringemen t of the applications should be guaranteed by users when integrating richtek products into any application. no legal responsibility for any said applications is assumed b y 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 0.800 1.100 0.031 0.043 a1 0.000 0.100 0.000 0.004 b 1.150 1.350 0.045 0.053 b 0.150 0.400 0.006 0.016 b1 0.350 0.500 0.014 0.020 c 1.800 2.450 0.071 0.096 d 1.800 2.200 0.071 0.087 e 1.300 0.051 h 0.080 0.260 0.003 0.010 l 0.200 0.460 0.008 0.018 sc - 82 surface mount package e d a c b a1 l b b1 h e
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