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power management SC633 fixed 5.3v output charge pump regulator features input voltage range 2.9v to 5.5v v out tolerance 5.3v 3% continuous output current 275ma, v in =3v peak output current 400ma three charge pump modes x, .5x and 2x output ripple 40mv pp for i out 400ma short circuit, over-voltage, and over-temperature protection soft-start functionality shutdown current 0. a, typical ultra thin package 2 x 2 x 0.6 (mm) lead-free and halogen-free weee and rohs compliant applications mobile phones mp3 players usb on-the-go multi-led backlit lcds compact fash/cf+ products pmps digital video cameras digital still cameras pdas ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? description the SC633 is a high-current voltage regulator using semtechs proprietary low-noise charge pump technol - ogy. performance is optimized for use in single li-ion battery cell applications. the regulator provides the per - formance of a linear, low drop-out (ldo) voltage regulator when the input is greater than 5.3v. unlike an ldo, drop- out is avoided when the input is less than 5.3v. instead, a charge pump is activated to provide voltage boost and the head-room needed for voltage regulation. only two 2.2 f bucket capacitors are required to deliver the full output current. the charge pump provides a low emi solution compared to inductive boost regulators. the SC633s charge pump has three modes of operation: 2x, .5x, and x modes. the 2x and .5x modes deliver current to the load in each of two phases. the x mode turns of the charge pump, delivering current through an ldo. when active, the charge pump provides low-ripple operation at 200khz, which is typically less than 30mvpp at the output. the SC633 is capable of delivering 275ma continuous current, with peak current to 400ma. a 22 f output capacitor is used for decoupling the load and for smoothing mode transitions. hysteresis is provided to prevent chatter between charge pump modes. sc 633 v b a t v o u t = 5 . 3 v @ 2 7 5 m a o u t c 1 + in g n d e n c 1 - c 2 + c 2 - c in 2 2 f c o u t 2 2 f c 1 2 . 2 f c 2 2 . 2 f c h ip e n a b le typical application circuit rev 2.0 us patent: 7,808,220 http://www..net/ datasheet pdf - http://www..net/
SC633 2 pin confguration marking information ordering information device package SC633ultrt ()(2) mlpd-ut-8 2x2 SC633evb evaluation board notes: () available in tape and reel only. a reel contains 3,000 devices. (2) lead-free packaging only. device is weee and rohs compliant, and halogen-free. t o p v ie w t 1 2 4 5 6 3 7 8 c 2 + c 2 - o u t e n g n d c 1 + c 1 - in nnn yw mlpd-ut-8;f2x2,f8flead ja f=f68c/w nnn=partfnumber oywf=fpinf1fandfdatecode device options part num nnn features sc630a k0a mhz, 3.3v, smaller c in and c out sc632a k2a mhz, 5v, smaller c in and c out sc632 632 200 khz, 5.0v sc630 630 200 khz, 3.3v SC633 633 200 khz, 5.3v http://www..net/ datasheet pdf - http://www..net/
SC633 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 ( ) 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. (2) tested according to jedec standard jesd22-a 4-b. absolute maximum ratings in (v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 out (v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 c +, c2+ (v) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (v out + 0.3) pin voltage all other pins (v) . . . . . . . . . -0.3 to (v in + 0.3) out pin short circuit duration . . . . . . . . . . continuous esd protection level (2) (kv) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 recommended operating conditions ambient temperature range (c) . . . . . . . . -40 t a +85 in (v) ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 v in 5.5 thermal information thermal resistance, junction to ambient () (c/w) . . . . 68 maximum junction temperature (c) . . . . . . . . . . . . . . + 50 storage temperature range (c) . . . . . . . . . . . . -65 to + 50 peak ir reflow temperature ( 0s to 30s) (c) . . . . . . . +260 unless otherwise specifed: t a = +25c for typ, -40c to +85c for min and max; c = c 2 = 2.2f (esr < 0.03?); c in = c out = 22f; v in = 2.9v to 5.5v parameter symbol condition min typ max units output voltage v out v in = 4.2v, i out = ma 5.4 5.3 5.46 v output voltage ripple v pp i out 400ma 40 mv maximum output current i out peak load - thermally limited () , t j < 50c, 3.3v v in 5.0v 400 ma continuous load, 3. 0v v in 4.2v 275 ma shutdown current i sd shutdown (en = gnd), v in = 3.6v 0. 2 a total quiescent current i q en high, i out = ma, vin=4.2v .5 2.5 ma charge pump frequency f pump v in = 3.2v 40 200 260 khz start-up time t su (en transitions from low to high), 5. 4v v out 5.46v, no load 400 s line regulation fv line i out = ma, 2.85v v in 4.2v 2 mv load regulation fv load v in =4.2v, ma i out 400ma 37.5 mv en input high threshold v ih v in = 5.5v .6 v electrical characteristics http://www..net/ datasheet pdf - http://www..net/
SC633 4 parameter symbol condition min typ max units en input low threshold v il v in = 2.7v 0.4 v en input high current i ih v in = 5.5v 2 a en input low current i il v in = 5.5v 2 a open-loop output resistance r out x mode 0.25 .5x mode, v in = 3.7v 2.85 2x mode, v in = 3.v 2.9 mode transition voltage (2) v trans x i out = 200ma 5.32 v v trans .5x i out = 200ma 3.86 v fault protection short-circuit current i sc v out = 0v, i out = i in 300 600 980 ma input current limit i limit v out > 2v, x mode 0.6 .2 2.0 a v out > 2v, .5x and 2x modes .2 2.0 2.8 a v out 2v, i out = i in 700 ma over temperature t otp rising threshold 65 c t hys hysteresis (3) 20 c electrical characteristics (continued) notes: () thermal limitation is dependent upon the thermal performance of the printed circuit board in support of the package standard of 68 c/w. (2) voltage at the in pin where a mode transition takes place in the charge pump with v in falling. (3) guaranteed by design not tested in production. http://www..net/ datasheet pdf - http://www..net/
SC633 5 typical characteristics loadfregulation linefregulation psrrfversusffrequencyff1.5xfmodef psrrfversusffrequencyff1.0xfmodef c in =c out =22f (0805) c =c 2 =2.2f (0603) psrrfversusffrequencyff2xfmodef c in =c out =22f (0805) c =c 2 =2.2f (0603) c in =c out =22f (0805) c =c 2 =2.2f (0603) vin=3.5v, vout=5.3v, 50ma, 2x mode vin=4.7v, vout=5.3v, 50ma, .5x mode vin=5.5v, vout=5.3v, 50ma, x mode v out = 5.3v, i out = 0ma i q (ma) quiescentfcurrent http://www..net/ datasheet pdf - http://www..net/
SC633 6 typical characteristics (continued) efciencyff10maf efciencyff50maf efciencyff200maf efciencyff100maf efciencyff400maf efciencyff300maf http://www..net/ datasheet pdf - http://www..net/
SC633 7 rippleff1xfmode time (4s/div) v out -pp (20mv/div) i out (200ma/div) v in = 5.5v, v out = 5.3v, i out = 400ma c in =c out =22f (0805) c =c 2 =2.2f (0603) rippleff1.5xfmode rippleff2xfmode v out -pp (50mv/div) i out (200ma/div) v out -pp (00mv/div) i out (200ma/div) time (4s/div) time (4s/div) c in =c out =22f (0805) c =c 2 =2.2f (0603) c in =c out =22f (0805) c =c 2 =2.2f (0603) v in = 4.2v, v out = 5.3v, i out = 400ma v in = 3.3v, v out = 5.3v, i out = 400ma startupf(nofload)f v in = 3.6v, i out = 0ma v en (v/div) C v out (2v/div) C startupf(400ma)f v in = 5v, i out = 400ma v en (v/div) C i out (200ma/div) v out (2v/div) C C typical characteristics (continued) time (100s/div) time (200s/div) modeftransitionfatfloadf=240ma c in =c out =22f (0805) c =c 2 =2.2f (0603) c in =c out =22f (0805) c =c 2 =2.2f (0603) v in = 3v to 5.5v, vout=5.3v, i out = 240ma i out (200ma/div) v in ( v/div, ch) C v out (200mv/div) C C c in =c out =22f (0805) c =c 2 =2.2f (0603) http://www..net/ datasheet pdf - http://www..net/
SC633 8 pin descriptions pin pin name pin function gnd ground connect to ground plane with multiple vias 2 c+ positive terminal of bucket capacitor 3 c- negative terminal of bucket capacitor 4 in input supply voltage 5 en chip enable active-high 6 out output 7 c2+ positive terminal of bucket capacitor 2 8 c2- negative terminal of bucket capacitor 2 t thermal pad this pad is for heat sinking and is not connected internally. it must be connected to a ground plane using multiple vias. http://www..net/ datasheet pdf - http://www..net/
SC633 9 block diagram charge pump 2 0 0 kh z l o g ic c o n tro l r e fe re n ce v o lta g e g e n e ra to r l d o c 1 + c 1 - c 2 - o u t in e n g n d c 2 + 5 7 4 2 3 8 6 1 http://www..net/ datasheet pdf - http://www..net/
SC633 0 general description the SC633 is a 5.3v output charge pump regulator designed to support up to peak current of 400ma (t a 55c, 3.3v v in 4.2v) and 275ma (t a 85c, 3. 5v v in 5.5v) of continuous current for powering 5.0v devices in portable handheld equipment including compact flash and cf+ products. the SC633 has three operating modes x, .5x, and 2x. the x mode is a linear series regulation mode with a low open-loop output resistance of only 250m w . the x mode functions as a low-noise series linear regulator. the .5x and 2x modes are a low noise, constant frequency, con - stant duty cycle switch mode, using two bucket capacitors. one bucket supports the full output current while the other bucket charges from the input. the two buckets exchange roles in the next phase, supplying continuous output current in both phases and reducing the need for a large output decoupling capacitor. the constant fre - quency, constant duty cycle operation also produces predictable constant frequency harmonics. thermal resistance the SC633 package is thermally efcient when the circuit board layout connects the thermal pad through multiple vias to the ground plane. the thermal resistance rating is dependent upon the connection between the thermal pad and the ground plane. a layout that is done correctly should keep the junction temperature below the over- temperature limit while operating the SC633 within the specifed electrical conditions. a poor layout may allow the junction temperature to reach the over temperature limit, so it is important to maintain adequate ground plane around the device to maximize heat transfer to the pcb. temperature derating the maximum power dissipation of the package can be calculated by the diference between the junction tem - perature of 50 degree and the ambient temperature divided by the thermal impedance 68 c/w. the higher the ambient temperature, the lower the maximum allow - able power dissipation. at a given v in condition, the allowable power dissipation will correlates to the specifc output current related to the operation efciency. the following derating curve is obtained based on efciency at input voltage of 5v and 3.3v. for any input conditions, due to the mode hysteresis, SC633 operation mode might be determined from its previous operation voltage, it could be in x, .5x, or 2x mode. the low efficiency should always be used for worst case consideration. in this case, at v in =3.3v, SC633 operates in 2x mode. at v in =5v, SC633 operates either in 2x or .5x mode. in the derating curve below, the dc operating points beneath each curve are in the safe operating temperature range of the mlp package. maximum continuous output mode transition as input voltage varies, the SC633 will experience mode transitions. the transition threshold changes with input voltage and load conditions. the mode change hysteresis at several load current conditions are shown in the oper - ating curves on page 6. mode transition will bring output voltage dip or overshoots. the output voltage deviation in mode transition can be improved by using larger output capacitors if the output voltage going beyond the regulation range. mode transition hysteresis hysteresis is provided to prevent chatter between charge pump modes for input steps of up to 20mv. decouple the input to prevent steps greater than 20mv, for applications information http://www..net/ datasheet pdf - http://www..net/
SC633 optimum transient performance, when the input voltage reaches the mode transition thresholds. protection circuitry the SC633 also provides protection circuitry that prevents the device from operating in an unspecifed state. these functions include: over-current protection (ocp) short-circuit current protection (sccp) over-temperature protection (otp) over-current protection over-current protection is provided to limit the output current. when v out is greater than 2v, ocp limits the output to a typical. the threshold at 2v allows the device to recover from excessive voltage droop during an over current. short-circuit current protection short-circuit current protection is provided to limit the current that can be sourced when the output is shorted to ground. when a short circuit forces v out to drop below 2v, the sccp detects the condition and limits the output current to 600ma (typical). over-temperature protection the over-temperature circuit helps prevent the device from overheating and experiencing a catastrophic failure. when the junction temperature exceeds 65c, the device is disabled. it remains disabled until the junction tempera - ture drops below this threshold. hysteresis is included ? ? ? applications information (continued) that prevents the device from re-enabling until the junc - tion temperature is reduced by 20c. capacitor selection the SC633 is designed to use low-esr ceramic capacitors for the input and output bypass capacitors as well as the charge pump bucket capacitors. ideal performance is achieved when the bucket capacitors are exactly equal. the value of input and output decoupling capacitors will vary with system requirements. for best ripple perfor - mance c in and c out are normally 22f and the bucket capacitors c and c 2 are 2.2f. for low profle designs, two 0f capacitors may be used in place of each 22f. when selecting capacitors for an application, frst consider the dc voltage characteristic of the capacitor. the value of capacitance at the dc operating voltage may be con - siderably lower than the rated value. the following table lists recommended capacitor values which have been chosen to minimize the impact of this limitation. table recommended capacitors capacitor value f case size notes c in , c out 22 0805 typical output v pp 20mv in all charge pump modes typical input ripple 00mv in all charge pump modes c bucket 2.2 0603 required for the full rated output current c bucket 2.2 0402 useful for load current up to 300ma note: use only x5r type capacitors, with a 6.3v rating or higher the highest capacitance values in the smallest package sizes will tend to have poor dc voltage characteristics. the highest value 0402 size capacitor retains as little as 35% of its rated value at 5vdc. the same value chosen in the next larger package size, 0603, will retain about 60% of its rated value at 5vdc. http://www..net/ datasheet pdf - http://www..net/
SC633 2 applications information (continued) pcb layout considerations poor layout can degrade the performance of the regula - tor and can be a contributory factor in emi problems, ground bounce, thermal issues, and resistive voltage losses. poor regulation and instability can result. the following design rules are recommended: place the bucket capacitors as close to the device as possible and on the same side of the board. use short wide copper areas between the capacitor pins and the device pins. . place the input and output decoupling capacitors as close as possible to the device and connect these capacitors ground pads together to the ground plane using multiple vias through a short wide copper area. connect pin directly to the copper area under the thermal pad. the thermal pad at the center of the device is not electrically connected. connect this pad to the ground plane using multiple vias. use a ground plane to further reduce noise interference on sensitive circuit nodes. 2. 3. 4. 5. c o u t e n in c in sc 633 out c 2 + c 2 - c 1 + c 1 - gnd c 2 gnd en c 1 http://www..net/ datasheet pdf - http://www..net/
SC633 3 outline drawing mlpd-ut-8 2x2 2 . 00 . 079 p in 1 in d ic a t o r ( la s e r m a r k ) a 1 s e a t in g p la n e c b a aaa c 1 n e 2 . 10 2 . 10 1 . 90 1 . 90 . 083 . 083 . 075 . 075 2 a 2 d e / 2 e bxn bbb c a b 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 ll a s t h e t e r m in a ls . 2 . d 1 . 061 . 067 . 071 1 . 55 1 . 70 1 . 80 e 1 . 026 . 031 . 035 0 . 65 0 . 80 0 . 90 d / 2 e / 2 e lxn d 1 e 1 in c h e s . 020 b s c b . 007 bbb aaa n l e d . 012 d im a 1 a 2 a m in . 000 . 020 0 . 30 0 . 18 . 012 0 . 25 . 010 0 . 40 0 . 30 . 004 . 003 8 . 014 . 079 . 016 0 . 08 0 . 10 8 0 . 35 2 . 00 0 . 50 b s c m illim 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 (. 006 ) - - m a x . 002 . 024 n o m 0 . 50 - ( 0 . 1524 ) - c o n t r o llin g d im e n s io n s a r e in m illim e t e r s ( a n g le s in d e g r e e s ). n o t e s : 1 . a http://www..net/ datasheet pdf - http://www..net/
SC633 4 land pattern mlpd-ut-8 2x2 in c h e s d im e n s io n s p z x y c g d im m illim e t e r s f a ilu 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 . s h a ll 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 la n e . t h e r m a l v ia s in t h e la n d p a t t e r n o f t h e e x p o s e d p a d 3 . h . 067 1 . 70 k . 031 0 . 80 r . 006 0 . 15 y r g z p x ( c ) 1 . c o n t r o llin g d im e n s io n s a r e in m illim e t e r s ( a n g le s in d e g r e e s ). h k . 030 . 106 (. 077 ) . 047 0 . 75 2 . 70 ( 1 . 95 ) 1 . 20 0 . 30 0 . 50 . 020 . 012 t h is la 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 ly . c o n s u lt 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 c o m p a n y ' s m a n u f a c t u r in g g u id e lin e s a r e m e t . n o t e s : 2 . http://www..net/ datasheet pdf - http://www..net/
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 SC633 5 ? semtech 20 3 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 conse - quence 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 elec - trical 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 applications is understood to be undertaken solely at the customers own risk. should a customer purchase or use semtech products for any such unauthorized application, the customer shall indemnify and hold semtech and its ofcers, employees, subsidiaries, afliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. notice: all referenced brands, product names, service names and trademarks are the property of their respective owners. http://www..net/ datasheet pdf - http://www..net/

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