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power management SC563 dual output 300ma ldo linear regulator features input voltage range 2.3v to 5.5v two 300ma (maximum) outputs dropout at 300ma load 80mv (typ) quiescent supply current 50fa (x2) shutdown current 00na output noise 00fv rms /v over-temperature protection short-circuit protection under-voltage lockout internal output discharge 00 w mlpd-ut8, .6mm x .2mm x 0.6mm package applications consumer electronics wearable & portable electronics cell phones gps devices set top boxes/hdtvs communication electronics industrial electronics ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? description the SC563 is a dual output, low dropout linear voltage regulator designed for use in battery powered applica - tions and other applications with space constraints and low power requirements. the SC563 provides fxed output voltages up to 300ma of load current per channel. fixed output voltages for each output eliminates the need for external feedback resistors. the device has separate input, output and enable pins for each ldo channel. using the lowest possible input voltage for each output voltage reduces the power loss for each rail. this improves overall package thermal per - formance and efciency compared to single input voltage devices. the device has fast turn-on and turn-of voltage slew rate for fast system start up and reset response. low quiescent current extends battery life. the SC563 family of devices provide protection circuitry such as short-circuit protection, under-voltage lockout, and thermal protection to prevent device failures. stability is maintained by using f capacitors on the output pins. the mlpd-ut8 .6mmx .2mm package and small ceramic bypass capacitors minimize the required pcb area. 1 f o u t 1 o u t 2 v in 1 e n 1 o u t 2 e n 1 o u t 1 p a d v in 1 1 f c o u t 2 1 u f e n 2 e n 2 sc 1 f v in 2 v in 2 563 c o u t 1 c in 2 c in 1 g n d g n d typical application circuit rev 2.0
SC563 2 pin confguration marking information ordering information device package SC563lhultrc ()(2) mlpd-ut8 .6.2 SC563lhevb (3) evaluation board notes: () available in tape and reel only. a reel contains 3,000 devices. (2) lead-free package only. device is weee and rohs compliant. (3) see the voltage options table for manufacture part number t o p v ie w e n 1 8 v in 1 7 v in 2 6 2 o u t 1 1 g n d 3 o u t 2 4 e n 2 5 g n d p a d mlpd-ut8; 1.6x1.2, 8 lead ja = 90c/w voltage options and part numbering device ordering number output voltage options mark - ing code auto-dis - charge out out2 SC563lh SC563lhultrc 3.3v .8v lh yes note: for additional fixed output voltage options, contact semtech marketing.
SC563 3 exceeding the above specifcations may result in permanent damage to the device or device malfunction. operation outside of the parameters specifed in the electrical characteristics section is not recommended. notes: () tested according to jedec standard jesd22-a 4-b. (2) calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer fr4 pcb with thermal vias under the exposed pad per jesd5 standards. absolute maximum ratings vin , vin2 (v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 en , en2(v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 pin voltage all other pins (v) . . . . . -0.3 to (v vin + 0.3) esd () protection l evel (kv). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 recommended operating conditions ambient temperature range (c) . . . . . . . . . -40 < t a < +85 v vin (v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 to 5.5 en to gnd(v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to vin en2 to gnd(v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to vin2 thermal information thermal resistance, junction to ambient (2) (c/w) 90 maximum junction temperature (c) . . . . . . . . . . . . . . + 25 storage temperature range (c) . . . . . . . . . . . . -65 to + 50 peak ir reflow temperature ( 0s to 30s) (c) . . . . . . . +260 unless otherwise noted v vin = max[v outx + .0v or 2.3v], c in = c in2 = ff, c out = c out2 = ff, v en = v en2 = v vin , -40 c < t a =t j < 25c. typical values are at t a = 25c. all specifcations apply to both ldos unless otherwise noted. parameter symbol conditions min typ max units input supply voltage range v in 2.3 5.5 v output voltage accuracy () v outx i outx =ma, v in max(v outx + .0v or 2.3v) -3 +/- 2 3 % maximum output current i max each ldo 300 ma dropout voltage (2) v d i outx = 300ma, v inx = 3.0v to 3.6v 80 450 mv i outx = 300ma, v inx = 3.0v to 3.6v, -40c < t a < 85c 80 400 mv i outx = 300ma, v inx = 2.3v to 3.0v 300 540 mv i outx = 300ma, v inx = 2.3v to 3.0v -40c < t a < 85c 300 490 mv shutdown current i sd enx=0, 0. fa quiescent current i q i outx = 0ma, v enx = v inx (per ldo) 50 a load regulation v loadx i outx = ma to i max, -40 c < t a <=85c 5 40 mv line regulation v linex i outx = ma, -40 c < t a <=85c 0.02 0. %/v electrical characteristics
SC563 4 parameter symbol conditions min typ max units current limit i limx 350 550 750 ma noise e n r load = 50 w , 0hz < f < 00khz 00 fv rms /v power supply rejection ratio psrr i outx = 5ma, f = khz, 60 db under voltage lockout v uvlox v in rising .95 2. 2.25 v uvlo hysteresis v uvlo-hys 00 mv over temperature protection threshold (3) t ot temperature rising 50 c over temperature threshold hysteresis v ot-hys 0 c digital inputs logic input high threshold v ih v in = 5.5v .2 v logic input low threshold v il v in = 2.5v 0.4 v logic input high current i ih v in = 5.5v fa logic input low current i il v in = 5.5v fa electrical characteristics (continued) notes: ( ) x indicates ldo or ldo2. (2) dropout voltage is defned as v in - v outx , when v outx is 00mv below the value of v outx at v in max(v outx + .0v or 2.3v). (3) thermal shutdown does not latch ldos of. recovery begins if the temperature drops by the hysteresis level.
SC563 5 pin confgurations and descriptions SC563 pin name pin function gnd ground 2 out output for ldo --bypass with a uf capacitor 3 out2 output for ldo2 --bypass with a uf capacitor 4 gnd ground 5 en2 enable for ldo2, internal 5 m w pull low. 6 vin2 input supply for ldo2 --bypass with a uf capacitor 7 vin input supply for ldo -- bypass with a uf capacitor 8 en enable for ldo , internal 5 m w pull low. pad heat sink pad, connect to ground on pcb.
SC563 6 block diagram v r e f o t p s ch m itt 7 2 8 e n 1 g n d v in 1 o u t 1 sc 56 3 c u rre n t l im it + _ e n 2 g n d v in 2 o u t 2 3 4 1 6 5 u v l o b uf a m p v r e f o t p s ch m itt c u rre n t l im it + _ u v l o b uf a m p
SC563 7 load regulation (vin=3.6v, vout=3.3v) 3.20 3.23 3.25 3.28 3.30 3.33 3.35 3.38 3.40 0.00 0.05 0.10 0.15 0.20 0.25 0.30 output voltage (v) load current (a) ta=25c ta=-40c ta=85c 1.70 1.73 1.75 1.78 1.80 1.83 1.85 1.88 1.90 0.00 0.05 0.10 0.15 0.20 0.25 0.30 output voltage (v) load current (a) ta=25c t=-40c ta=85c load regulation (vin=4.2v, vout=1.8v) 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 1.88 1.90 0.0 0.1 0.1 0.2 0.2 0.3 0.3 output voltage (v) load current (a) ta=25c ta=-40c ta=85c load regulation (vin=5.0v, vout=3.3v) 3.20 3.23 3.25 3.28 3.30 3.33 3.35 3.38 3.40 0.00 0.05 0.10 0.15 0.20 0.25 0.30 output voltage (v) load current (a) ta=25c ta=-40c ta=85c typical characteristics line regulation (vout=3.3v, iout=150ma) 3.20 3.22 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40 3.5 4.0 4.5 5.0 5.5 output voltage (v) input voltage (v) ta=25c ta=-40c ta=85c line regulation (vout=3.3v, iout=300ma) load regulation (vin=3.6v, vout=1.8v) 3.20 3.22 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40 3.5 4.0 4.5 5.0 5.5 output voltage (v) input voltage (v) ta=25c ta=-40c ta=85c
SC563 8 line regulation (vout=1.8v, iout=150ma) 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 1.88 1.90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 output voltage (v) input voltage (v) ta=25c ta=-40c ta=85c 0 50 100 150 200 250 300 350 400 3.2 3.3 3.4 3.5 3.6 vin - vout (v) input voltage (v) t=-40c t=85c t=25c dropout voltage (vout=3.3v, iout=150ma) 0 50 100 150 200 250 300 350 3.2 3.3 3.4 3.5 3.6 vin - vout (v) input voltage (v) t=-40c t=85c t=25c line regulation (vout=1.8v, iout=250ma) 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 1.88 1.90 2.5 3.0 3.5 4.0 4.5 5.0 5.5 output voltage (v) input voltage (v) ta=25c ta=-40c ta=85c typical characteristics dropout voltage (vout=3.3v, iout=300ma) 0 50 100 150 200 250 300 350 400 3.2 3.3 3.4 3.5 3.6 vin - vout (v) input voltage (v) t=-40c t=85c t=25c dropout vs load current (vout=3.3v) dropout voltage (vout=3.3v, iout=50ma) 0 50 100 150 200 250 0 50 100 150 200 250 300 vin - vout (mv) load current (ma) ta=25c ta=-40c ta=85c
SC563 9 typical characteristics 00us/div v in = 5v i out = 300ma ms/div v in = 5v i out = 300ma shutdown ( v out =3.3v) start up via v in ( v out =1.8v) 00us/div v in = 5v i out = 300ma ms/div v in = 5v i out = 300ma 2ms/div start up (enable) ( v out =1.8v) start up via v in ( v out =3.3v) start up (enable) ( v out =3.3v) shutdown ( v out =1.8v) v in 2v/div v out v/div i out 00ma/div v in 2v/div v out 2v/div i out 00ma/div en 2v/div v in 2v/div v out v/div i out 00ma/div v in 2v/div v out 2v/div i out 00ma/div en 2v/div v in = 5v i out = 300ma 2ms/div v in = 5v i out = 300ma v in 2v/div v out v/div i out 00ma/div v in 2v/div v out v/div i out 00ma/div
SC563 0 typical waveforms 200us/div v in = 3.6v i out = 0a to 300ma 200us/div v in = 3.6v i out = 0ma to 300ma ldo1=3.3v, 0 to 300ma load transient ldo1=3.3v, 0 to 300ma load transient 200us/div v in = 4.2v i out = 0a to 300ma 200us/div v in = 4.2v i out = 0a to 300ma 200us/div v in = 5v i out = 0a to 300ma ldo2=1.8v, 0 to 300ma load transient ldo1=3.3v, 0 to 300ma load transient ldo2=1.8v, 0 to 300ma load transient ldo2=1.8v, 0 to 300ma load transient v out 20mv/div i out 00ma/div v in = 5v i out = 0a to 300ma v out 20mv/div i out 00ma/div v out 20mv/div i out 00ma/div v out 20mv/div i out 00ma/div v out 20mv/div i out 00ma/div v out 20mv/div i out 00ma/div 200us/div
SC563 typical waveforms 1.0e-08 1.0e-07 1.0e-06 1.0e-05 1.0e-04 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 v/sqrt hz frequency (hz) v in = 5.4v, v out = 3.3v, load 50 ohms 0 20 40 60 80 100 120 100 1000 10000 100000 1000000 psrr (db) frequency (hz) 0 10 20 30 40 50 60 70 80 90 100 100 1000 10000 100000 1000000 psrr (db) frequency (hz) ldo2=1.8v, psrr, iout=30ma ldo2=1.8v, psrr, iout=100ma ldo1=3.3v noise spectral density 1.0e-08 1.0e-07 1.0e-06 1.0e-05 1.0e-04 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 v/sqrt hz frequency (hz) v in = 5.4v, v out = 3.3v, load 50 ohms ldo2=1.8v noise spectral density
SC563 2 general description the SC563 is a dual output linear regulator with low dropout voltage, low supply current, and low output noise. the device provides a simple, low cost solution with minimal pcb area. it has a miniature package size and needs four f 0402 size external capacitors for its input and output. the dual ldos are powered from separate input supply pins. each ldo provides up to 300ma output current. power on and of control and turn-on delay the SC563 device has separate enable pins (en and en2) that control the ldo outputs respectively. pulling enable pin high will enable the device when the vin is above the its uvlo level at about 2.4v. pulling this pin low causes the device to shutdown where it typically draws 00na from the input supply. when the enable pins are connected to the input voltage supply, the device turn-on and turn-of has two voltage thresholds to overcome. at the turn-on event, the enable pin voltage needs to be greater than the enable threshold and the vin voltage needs to be higher than the uvlo. the higher of the two voltages, which is the uvlo, determines the turn on time. at turn-off, the first condition of either enable threshold low or the vin uvlo will determine the turn-of event. after the enable goes high, the ic has a delay time before the output voltage ramps up. the delay is typically between 20 s to 5 0 s. the 5 0 s is related to the lower vin condition. with uf output capacitor ( capacitor part number: grm55r6a05ke5) at no load conditions, the output voltage ramp time is typically at 5 s. the device has an internal discharge mosfet to discharge the output voltage at disable, the typical discharge time is at 2ms. the enable and disable waveforms are illustrated in figure and the oscilloscope waveform is shown in the typical characteristics. the output noise ldos noise generally is characterized through noise spectral density (nsd) and total rms value in the frequency band between 0hz to 00k hz. the noise spectral density can be measured using a network analyzer with active probes. the rms noise value is obtained from the noise spectral density curve by taking the square root of the area within the frequency range from 0hz to 00khz. the normalized output noise for SC563 is at a typical value of 00 vrms/v. the generalized output voltage noise can be approximated by: v rms =v out *00 v. protection features the SC563 provides protection features to ensure that no damage is incurred in the event of a fault condition. these functions include: under-voltage lockout over-temperature protection short-circuit protection with peak and fold- back current limit ? ? ? applications information s 140 - 510 15 s e nable v out 2 m s figure 1 ? timing diagram
SC563 3 applications information (continued) under-voltage lockout the under-voltage lockout (uvlo) circuit protects the device from operating in an unknown state if the input voltage supply is too low. when either v in drops below the uvlo threshold, as defined in the electrical characteristics section, the corresponding ldo is disabled. the ldo is re-enabled when v in is increased above the hysteresis level. when powering up with v in below the uvlo threshold, the ldo remains disabled. over-temperature protection over-temperature protection are separately available on both ldos. an internal over-temperature (ot) protection circuit monitors the internal junction temperature. when the temperature exceeds the ot threshold as defned in the electrical characteristics section, the ot protection dis - ables the corresponding ldo output. when the tempera - ture drops below its hysteresis value, the ldo output will resume. short-circuit protection each output has short-circuit protection with peak current limit and fold back current limit. if the output current exceeds the peak current limit, the output voltage will drop and the output current will be limited to its fold back current limit value. see the waveforms in the typical operation section. if the short circuit is removed or the load current reduces to below the fold back current limit, the ldo output will rise back into regulation. component selection SC563 is designed for pcb savings with small area. the recommended input and output capacitor is ff with 0402 package with part number grm 55r6a05ke5. although there is no maximum value of output capacitor specifed, very large values may increase the rise time of the output voltages without affecting stability. it is recommended that the value of output capacitance be restricted to a maximum of 0ff. ceramic capacitors of type x5r or x7r should be used because of their low esr and stable temperature coefcients. tantalum capacitors and y5v capacitors are not recommended. thermal considerations although each of the two ldos in the SC563 can provide 300ma of output current, the maximum power dissipation in the device is restricted by the miniature package size. the graphs in figures 2 can be used as a guideline to determine whether the input voltage, output voltages, output currents, and ambient temperature of the system result in power dissipation within the operating limits are met or if further thermal relief is required. 0 0.5 1 1.5 2 2.5 -50 -35 -20 -5 10 25 40 55 70 85 100 maximum power dissipation (w) ambient temperature (c) tj=150c tj=125c tj=105c the following procedure can be followed to determine if the thermal design of the system is adequate. the junc - tion temperature of the SC563 can be determined in known operating conditions using the following equation: t j = t a +(p d x ja ) where t j = junction temperature (c) t a = ambient temperature (c) p d = power dissipation (w) ja = thermal resistance junction to ambient (c/w)
SC563 4 example a SC563lh is used to provide outputs of 3.3v, 50ma from ldo and .8v, 250ma from ldo2. the input voltage is 4.2v for ldo and 2.5v for ldo2, and the ambient temperature of the system is 60c. p d = 0.5x(4.2 C 3.3) + 0.25x(2.5 C .8) = 0.3w and t j = 60 + (0.3 x 90) = 87.9c this calculation shows the junction temperature is 87.9c and it is below the maximum junction temperature of 25c for this power dissipation. this example also dem - onstrates that with separate input voltages for ldo and ldo2, the total power dissipation can be reduced with the lower ldo output voltage fed by a lower input voltage. applications information (continued) layout considerations the diagram in figure 3 below illustrates proper layout of a circuit. the layout considerations are listed below: attach the thermal pad of the device to a copper pad with vias connected to the gnd plane. this enables better heat transfer from the device to the pcb. place the input and output capacitors close to the device for optimal transient response and device behavior. extra copper trace length between the device input and output to the capacitor soldering pad introduces parasitic inductance. connect all ground connections of the input and output capacitor directly to the ground plane whenever possible to minimize ground potential diferences on the pcb. shown in the evaluation board layout below, the SC563 thermal pad, ground pins, and the input and output capacitors are all connected to the ground plane through vias . ? ? ? figure 3 SC563 layout example
SC563 5 b b bb a aa n d 1 l e d d im a 1 a 2 a 0 .25 0 .15 0 .20 0 .35 1 .25 0 .25 1 .00 0 .08 0 .10 8 0 .30 1 .60 1 .15 0 .4 0 b s c m il lim e t e r s m a x 0 .05 0 .60 d im e n s io n s m in 0 .00 n o m 0 .50 - (0.15 2) - c o n t r o l lin g d im e n s io n s a r e in m il lim e t e r s (a n g l e s in d e g r e e s ). c o p la n a r it y a p p lie s t o t h e e x p o s e d p a d a s w e l l a s t h e t e r m in a ls . n o t e s : 2. 1. e 1 0 .10 0 .20 0 .30 1 .20 e 1 2 n 1 .70 1 .50 1 .10 1 .30 a b p in 1 in d ic a t o r (la s e r m a r k ) a aa c a 1 b bb c a b c s e a t in g p la n e d e e /2 e b xn d /2 d 1 l xn e /2 e 1 a a 2 outline drawing mlpd-ut8 1.6x1.2 land pattern mlpd-ut8 1.6x1.2 t h is l a n d p a t t e r n is f o r r e f e r e n c e p u r p o s e s o n l y . c o n s u l t y o u r m a n u f a c t u r in g g r o u p t o e n s u r e y o u r n o t e s : 2 . d im x y p g h m il l im e t e r s 0 .2 0 0 .2 0 0 .6 0 0 .4 0 0 .5 5 d im e n s io n s c o m p a n y 's m a n u f a c t u r in g g u id e l in e s a r e m e t . 1 .7 5 z c (1 .1 5 ) 1 . c o n t r o l lin g d im e n s io n s a r e in m il lim e t e r s (a n g l e s in d e g r e e s ). t h e r m a l v ia s in t h e l a n d p a t t e r n o f t h e e x p o s e d p a d s h a l l b e c o n n e c t e d t o a s y s t e m g r o u n d p l a n e . f a il u r e t o d o s o m a y c o m p r o m is e t h e t h e r m a l a n d /o r f u n c t io n a l p e r f o r m a n c e o f t h e d e v ic e . 3 . k 1 .2 5 y z x k h g p /2 p (c )
SC563 6 ? semtech 20 5 all rights reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specifed maximum ratings or operation outside the specifed range. semtech products are not designed, intended, authorized or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. inclusion of semtech products in such ap - plications is understood to be underta k en solely at the customers own ris k . should a customer purchase or use semtech products for any such unauthorized application, the customer shall indemnify and hold semtech and its ofcers, em - ployees, subsidiaries, afliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. semtech corporation power management products division 200 flynn road, camarillo, ca 930 2 phone: (805) 498-2 fax: (805) 498-3804 www.semtech.com contact information

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