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power management SC630A 1mhz fixed 3.3v output charge pump regulator features input voltage range 2.95v to 5.5v v out tolerance 3.3v 3% continuous output current 300ma max three charge pump modes x, .5x and 2x output ripple voltage 33mv pp , typical 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 tablets usb on-the-go multi-led backlit lcds compact fash/cf+ products digital video cameras dvi/hdmi ports wi-fi base stations modems set-top boxes ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? description the SC630A is a high-current voltage regulator using semtechs proprietary low-noise charge pump technol - ogy. the charge pump provides a low emi solution compared to inductive boost regulators. performance is optimized for use in single li-ion battery cell applications. the regulator provides the performance of a linear, low drop-out (ldo) voltage regulator when the battery is greater than 3.3v. unlike an ldo, drop-out is avoided when the battery is less than 3.3v. instead, a charge pump is activated to provide voltage boost and the head-room needed for regulation. the SC630As 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. hysteresis is provided to prevent chatter between charge pump modes. when active, the charge pump pro - vides low-ripple operation at mhz. typically the output ripple is % of the output voltage 33mvpp at 25ma. a small 2.2f capacitor is recommended for all four capaci - tors. the full rated output current is provided when 2.2f is used for both bucket capacitors. at the output, a 2.2f capacitor decouples the load and provides smoothing for mode transitions, while another 2.2f is used to decouple the input. sc 630 a v bat v out = 3 . 3 v @ 300 ma out c 1 + in gnd en c 1 - c 2 + c 2 - c in 2 . 2 f c out 2 . 2 f c 1 2 . 2 f c 2 2 . 2 f chip enable typical application circuit rev. . us patent: 7,808,220 ? 20 semtech corporation
SC630A 2 pin confguration marking information ordering information device package SC630Aultrt ()(2) mlpd-ut-8 2x2 SC630Aevb 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 and halogen free. top view t 1 2 4 5 6 3 7 8 c 2 + c 2 - out en gnd c 1 + c 1 - in k 0 a yw mlpd-ut-8;f2x2,f8flead ja f=f68c/w ywf=fdatecode
SC630A 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 in, 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 short circuit duration . . . . . . . . . . . . . . . . . continuous esd protection level () (kv) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 recommended operating conditions ambient temperature range (c) . . . . . . . . -40 < t a < +85 in (v) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.95 < v in < 5.5 thermal information thermal resistance, junction to ambient (2) (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 = 2.95v to 5.5v parameter symbol condition min typ max units output voltage v out v in = 4.2v, i out = ma 3.2 3.3 3.4 v output voltage ripple v pp i out = 25ma 33 mv continuous load, 2.95v v in 5.5v, x or .5x mode 300 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 2.5 3.5 ma charge pump frequency f pump v in = 3.2v mhz start-up time t su (en transitions from low to high), 3.2v v out 3.4v, no load 400 s line regulation v line i out = ma, 2.95v v in 4.2v 2 mv load regulation v load v in fixed, ma f i out f 300ma 25 mv en input high threshold v ih v in = 5.5v .6 v 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 electrical characteristics
SC630A 4 parameter symbol condition min typ max units en input low current i il v in = 5.5v 2 a open-loop output resistance r out x mode 0.3 ? .5x mode, v in = 3.08v 4.5 ? 2x mode, v in = 2.95v 2.6 ? mode transition voltage (2) v trans x i out = 300ma 3.35 v v trans .5x i out = 300ma 3.08 v fault protection short-circuit current i sc v out = 0v, i out = i in 300 600 980 ma input current limit i limit x mode 0.6 .2 2.0 a .5x and 2x modes .2 2.0 2.8 a v out f 2v, i out = i in 700 ma over temperature (3) t otp rising threshold 65 c t hys hysteresis 20 c 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 is where a mode transition takes place in the charge pump with v in falling. (3) guaranteed by design not tested in production electrical characteristics (continued)
SC630A 5 typical characteristics loadfregulation output current ( ma ) v out = 3 . 3 v , v in = 3 . 6 v - 25 - 20 - 15 - 10 - 5 0 o u t p u t v o l t a g e v a r i a t i o n ? v l o a d ( m v ) t a = 85 c t a = - 40 c 0 50 100 150 200 250 300 350 t a = 25 c v out = 3 . 3 v , i out = 1 ma o u t p u t v o l t a g e v a r i a t i o n ? v l i n e ( m v ) input voltage ( v ) - 20 - 15 - 10 - 5 0 5 10 15 20 2 . 7 3 . 1 3 . 5 3 . 9 4 . 3 4 . 7 5 . 1 5 . 5 85 c 25 c - 40 c v out = 3 . 3 v 50 60 70 80 90 100 e f f i c i e n c y ( % ) load current ( ma ) 0 50 100 150 200 250 300 350 v in = 3 . 4 v v in = 3 . 6 v v in = 3 . 8 v v in = 4 . 0 v efciencyfversusfloadfcurrent linefregulation psrrff1.5xfmodef v in = 3 . 2 v , v out = 3 . 3 v , i out = 50 ma - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 g a i n ( d b ) 10 100 1000 10000 frequency ( hz ) psrrff1xfmodef r i p p l e ( m v p - p ) 50 ma 10 ma 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 input voltage ( v ) 0 20 40 60 80 100 v out = 3 . 3 v , c in = c out = c 1 = c 2 = 2 . 2 f ( 0603 ) 1 x mode 1 . 5 x and 2 x mode 100 ma 200 ma 300 ma c in = c out = c = c 2 = 2.2f (0603) psrrff1xfmodef v in = 4 . 2 v , v out = 3 . 3 v , i out = 50 ma 10 100 1000 10000 frequency ( hz ) - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 g a i n ( d b ) outputfripple c in = c out = c = c 2 = 2.2f (0603)
SC630A 6 typical characteristics (continued) efciencyff10maf efciencyff50maf efciencyff200maf efciencyff100maf efciencyff300maf v out = 3 . 3 v , i out = 10 ma input voltage ( v ) 50 60 70 80 90 100 e f f i c i e n c y ( % ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 x mode 1 . 5 x mode mode transition hysteresis input voltage ( v ) v out = 3 . 3 v , i out = 50 ma 50 60 70 80 90 100 e f f i c i e n c y ( % ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 x mode 1 . 5 x mode mode transition hysteresis v out = 2 . 95 v , i out = 100 ma input voltage ( v ) 50 60 70 80 90 100 e f f i c i e n c y ( % ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 x mode 1 . 5 x mode mode transition hysteresis input voltage ( v ) v out = 3 . 3 v , i out = 200 ma 2 x mode 50 60 70 80 90 100 e f f i c i e n c y ( % ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 . 5 x mode 1 x mode mode transition hysteresis input voltage ( v ) v out = 3 . 3 v , i out = 300 ma e f f i c i e n c y ( % ) 40 50 60 70 80 90 100 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 2 x mode 1 . 5 x mode 1 x mode mode transition hysteresis
SC630A 7 rippleff1xfmode time (1s/div) v in = 3.6v, v out = 3.3v, i out = 25ma c in =c out =c =c 2 =2.2f (0603) rippleff1.5xfmode rippleff2xfmode time (1s/div) time (1s/div) v in = 3.2v, v out = 3.3v, i out = 25ma v in = 2.85v, v out = 3.3v, i out = 25ma 0ma 25ma startupf(nofload)f v in = 3.6v, i out = 0ma startupf(215ma)f v in = 3.6v, i out = 25ma typical characteristics (continued) time (200s/div) time (200s/div) quiescentfcurrent v out = 3 . 3 v , i out = 1 ma 25 c 85 c - 45 c v in ( v ) i q ( m a ) 0 0 . 5 1 1 . 5 2 2 . 5 2 . 8 3 . 2 3 . 6 4 4 . 4 4 . 8 5 . 2 5 . 6 v in -pp (00mv/div) v out -pp (00mv/div) i out (200ma/div) c in =c out =c =c 2 =2.2f (0603) c in =c out =c =c 2 =2.2f (0603) c in =c out =c =c 2 =2.2f (0603) c in =c out =c =c 2 =2.2f (0603) v in -pp (00mv/div) v out -pp (00mv/div) i out (200ma/div) v in -pp (00mv/div) v out -pp (00mv/div) i out (200ma/div) v en (2v/div) C 0v v out (2v/div) C C 0v i out (200ma/div) C 0v v en (2v/div) C 0v v out (2v/div) C C 0v i out (200ma/div) C 0v 0ma 25ma 0ma 25ma
SC630A 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.
SC630A 9 block diagram charge pump 1 mhz logic control reference voltage generator ldo c 1 + c 1 - c 2 - out in en gnd c 2 + 5 7 4 2 3 8 6 1
SC630A 0 general description the SC630A is a 3.3v output charge pump regulator designed to support up to 300ma (t a 85c, 2.95v v in 5.5v) of continuous current. it is used for powering micro hdds (hard disk drives) and other 3.3v devices in porta - ble handheld equipment including compact flash and cf+ products. the SC630A has three operating modes x, .5x, and 2x. the x mode is a linear series regulation mode with a low output resistance of only 300m ? . the x mode func - tions as a low noise series linear regulator. the .5x and 2x modes are a low noise constant frequency, constant 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 frequency, constant duty cycle operation also produces predictable constant frequency harmonics. mode transition hysteresis hysteresis is provided to prevent chatter between charge pump modes. the hysteresis between charge pump modes is shown in the efficiency plots of the typical characteristics section. for optimum transient perfor - mance, the input should be decoupled to prevent steps greater than the hysteresis voltage. note that hysteresis is load dependent, and increases with the load current to prevent chatter between the charge pump modes. thermal resistance the SC630A package is thermally efficient when the circuit board layout connects the thermal pad through multiple vias to the ground plane. the thermal resistance 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 SC630A 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 load current and battery voltage range of the appli - cation should be compared with the efciency plots on page 6 to determine if 2x mode is required by the appli - cation. the data provided in the following derating curve for 2x mode is based on the peak power dissipation that could occur while in 2x mode. x and .5x modes do not require derating. 100 150 200 250 300 350 35 45 55 65 75 85 95 105 ambient temperature ( c ) i o u t ( m a ) derating for applications requiring 2 x mode maximum continuous output protection circuitry the SC630A also provides protection circuitry that pre - vents 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). ? ? ? applications information
SC630A 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 that prevents the device from re-enabling until the junc - tion temperature is reduced by 20c. capacitor selection the SC630A is designed to use low-esr ceramic capacitors for the input and output bypass capacitors as well as the charge pump bucket capacitors. the value of input, output and decoupling capacitors will vary with system require - ments for ripple and output current. performance as shown in the typical characteristic section is expected when using 2.2f capacitors in the 0603( 608 metric) case size with x5r dielectric for c in , c out , c and c 2 capacitors (refer to table ). consider the dc voltage characteristic of the capacitor when choosing capacitors for an application. the value of capacitance at the dc operating voltage may be consider - ably lower than the rated value. the following table lists recommended capacitor values which have been chosen to minimize the impact of this limitation. the highest capacitance values in the smallest package sizes 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. applications information (continued) table 1 recommended capacitors size code mil(mm) value f capacitor notes 0603(608) 2.2 c in , c out this capacitor is required for the full rated output current. typical output v pp < 00mv in all charge pump modes. c , c 2 0402(005) 2.2 c in , c out this capacitor combina - tion supports up to 200ma output current with typical output v pp < 00mv in all charge pump modes. c , c 2 0402(005) 0.47 c in , c out this capacitor combina - tion supports up to 00ma output current with typical output v pp < 00mv in all charge pump modes. c , c 2 0402(005) .0 c in , c out this combination of capaci - tors support up to 00ma output current with typical output v pp < 00mv in all charge pump modes. the 0. f bucket capacitors will increase output resis - tance by 2.5? compared to 0.47f and larger values. 0. c , c 2 note: use only x5r type capacitors, with a 6.3v rating or higher
SC630A 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 out en in c in sc 630 a out c 2 + c 2 - c 1 + c 1 - gnd c 2 gnd en c 1
SC630A 3 2 . 00 . 079 pin 1 indicator ( laser mark ) a 1 seating plane 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 coplanarity applies to the exposed pad as well as the terminals . 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 inches . 020 bsc b . 007 bbb aaa n l e d . 012 dim a 1 a 2 a min . 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 bsc millimeters max 0 . 05 0 . 60 dimensions min 0 . 00 nom (. 006 ) - - max . 002 . 024 nom 0 . 50 - ( 0 . 1524 ) - controlling dimensions are in millimeters ( angles in degrees ). notes : 1 . a outline drawing mlpd-ut-8 2x2
SC630A 4 land pattern mlpd-ut-8 2x2 inches dimensions p z x y c g dim millimeters failure to do so may compromise the thermal and / or functional performance of the device . shall be connected to a system ground plane . thermal vias in the land pattern of the exposed pad 3 . h . 067 1 . 70 k . 031 0 . 80 r . 006 0 . 15 y r g z p x ( c ) 1 . controlling dimensions are in millimeters ( angles in degrees ). h k . 030 . 106 (. 077 ) . 047 0 . 75 2 . 70 ( 1 . 95 ) 1 . 20 0 . 30 0 . 50 . 020 . 012 this land pattern is for reference purposes only . consult your manufacturing group to ensure your company ' s manufacturing guidelines are met . notes : 2 .
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 SC630A 5 ? semtech 20 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.

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