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power management SC632A 1mhz fixed 5.0v output charge pump regulator features input voltage range 2.95v to 5.5v v out tolerance 5.0v 3% continuous output current 275ma peak output current 400ma three charge pump modes x, .5x and 2x output ripple voltage 50mv 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 SC632A 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 input is greater than 5.0v. unlike an ldo, drop-out is avoided when the input is less than 5.0v. instead, a charge pump is activated to provide voltage boost and the head-room needed for voltage regulation. the SC632As charge pump has three modes of operation: 2x, .5x, and x modes. 2x and .5x are voltage boost modes that deliver current to the load in each of two phases. the x mode turns of the charge pump, deliver - ing current through an ldo. hysteresis is provided to prevent chatter between charge pump modes. when active, the charge pump provides low-ripple operation at mhz. typically the output ripple is 50mvpp at the maximum continuous current rating of 275ma. 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 632 a v bat v out = 5 . 0 v @ 275 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 revision .0 us patent: 7,808,220 ? 20 semtech corporation http://www..net/ datasheet pdf - http://www..net/
SC632A 2 pin confguration marking information ordering information device package SC632Aultrt ()(2) mlpd-ut-8 2x2 SC632Aevb 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. top view t 1 2 4 5 6 3 7 8 c 2 + c 2 - out en gnd c 1 + c 1 - in k 2 a yw mlpd-ut-8;f2x2,f8flead ja f=f68c/w ywf=fdatecode http://www..net/ datasheet pdf - http://www..net/
SC632A 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 () (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 in = c out = c = c 2 = 2.2f (esr < 0.03?); 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 4.85 5.0 5.5 v output voltage ripple v pp i out = 275ma 50 mv maximum output current i out peak load - thermally limited () , t j < 50c, 3.4v v in 5.5v 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 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), 4.85v v out 5. 5v, no load 400 s line regulation fv line i out = ma, 2.95v v in 4.2v 2 mv load regulation fv load v in =4.2v, ma i out 400ma 37.5 mv electrical characteristics http://www..net/ datasheet pdf - http://www..net/
SC632A 4 parameter symbol condition min typ max units en input high threshold v ih v in = 5.5v .6 v en input low threshold v il v in = 2.95v 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 3.5 2x mode, v in = 3.v 4.5 mode transition voltage (2) v trans x i out = 200ma 5.05 v v trans .5x i out = 200ma 3.8 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 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. electrical characteristics (continued) http://www..net/ datasheet pdf - http://www..net/
SC632A 5 typical characteristics loadfregulation 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 ) output current ( ma ) 0 80 160 240 320 400 t a = 25 c t a = - 40 c t a = 85 c 25 - 15 - 10 - 5 0 5 10 15 20 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 ) 2 . 7 3 . 1 3 . 5 3 . 9 4 . 3 4 . 7 5 . 1 5 . 5 input voltage ( v ) 3 . 6 v , 0 mv 85 c 25 c - 40 c linefregulation outputfripple 0 20 40 60 80 100 120 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 input voltage ( v ) r i p p l e ( m v p - p ) 400 ma 1 . 5 x and 2 x mode 1 x mode 300 ma 200 ma 100 ma 50 ma 10 ma psrrfversusffrequencyff1xfmodef - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 g a i n ( d b ) 10 100 1000 10000 frequency ( hz ) psrrfversusffrequencyff2xfmodef - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 g a i n ( d b ) 10 100 1000 10000 frequency ( hz ) v out = 5.0v, v in = 4.2v v out = 5.0v, i out = ma v in = 5.25v, v out = 5v, i out = 50ma; c in = c out = c = c 2 = 2.2uf (0603) v out = 5.0v, v in = 4.2v - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 g a i n ( d b ) 10 100 1000 10000 frequency ( hz ) psrrfversusffrequencyff1.5xfmodef v out = 5v; c in = c out = c = c 2 = 2.2uf (0603) v in = 4.2v, v out = 5v, i out = 50ma; c in = c out = c = c 2 = 2.2uf (0603) v in = 2.9v, v out = 5v, i out = 50ma; c in = c out = c = c 2 = 2.2uf (0603) http://www..net/ datasheet pdf - http://www..net/
SC632A 6 typical characteristics (continued) efciencyff10maf efciencyff50maf efciencyff200maf efciencyff100maf efciencyff400maf efciencyff300maf input voltage ( v ) e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 x mode 1 . 5 x mode 1 x mode 2 x mode 2 x mode 1 . 5 x mode mode transition hysteresis mode transition hysteresis 1 x mode 1 x mode e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 2 x mode 2 x mode 1 . 5 x mode 1 . 5 x mode mode transition hysteresis mode transition hysteresis 1 x mode 1 x mode e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 . 5 x mode 1 . 5 x mode 2 x mode 2 x mode mode transition hysteresis mode transition hysteresis 1 x mode 1 x mode e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 2 x mode 2 x mode mode transition hysteresis mode transition hysteresis 1 . 5 x mode 1 . 5 x mode 1 x mode 1 x mode e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 . 5 x mode 1 . 5 x mode 2 x mode 2 x mode mode transition hysteresis mode transition hysteresis 1 x mode 1 x mode e f f i c i e n c y ( % ) 30 40 50 60 70 80 90 100 input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 2 x mode 2 x mode 1 . 5 x mode 1 . 5 x mode mode transition hysteresis mode transition hysteresis v out = 5.0v, i out = 0ma, t a = 25c v out = 5.0v, i out = 50ma, t a = 25c v out = 5.0v, i out = 00ma, t a = 25c v out = 5.0v, i out = 200ma, t a = 25c v out = 5.0v, i out = 300ma, t a = 25c v out = 5.0v, i out = 400ma, t a = 25c http://www..net/ datasheet pdf - http://www..net/
SC632A 7 rippleff1xfmode time (400ns/div) v in = 5.2v, v out = 5.0v, i out = 275ma; c in = c out = c = c 2 = 2.2uf (0603) rippleff1.5xfmode rippleff2xfmode time (400ns/div) time (400ns/div) 0ma 275ma v in = 4.2v, v out = 5.0v, i out = 275ma; c in = c out = c = c 2 = 2.2uf (0603) v in = 3.2v, v out = 5.0v, i out = 275ma; c in = c out = c = c 2 = 2.2uf (0603) startupf(nofload)f v in = 3.6v, i out = 0ma; c in = c out = c = c 2 = 2.2uf (0603) v en (2v/div) C 0v v out (2v/div) C 0v 0v i out (200ma/div) startupf(400ma)f v in = 3.6v, i out = 400ma; c in = c out = c = c 2 = 2.2uf (0603) v en (2v/div) C 0v v out (2v/div) C 0v 0v i out (200ma/div) C typical characteristics (continued) time (200s/div) time (200s/div) quiescentfcurrent v out = 5v, i out = ma 1 x mode 2 x mode input voltage ( v ) 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 1 . 5 2 2 . 5 3 3 . 5 4 i q ( m a ) 1 x mode 1 . 5 x mode 1 . 5 x mode 2 x mode 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 in -pp (00mv/div) v out -pp ( 00mv/div) i out (200ma/div) 0ma 275ma 0ma 275ma http://www..net/ datasheet pdf - http://www..net/
SC632A 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/
SC632A 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 http://www..net/ datasheet pdf - http://www..net/
SC632A 0 general description the SC632A is a 5.0v output charge pump regulator designed to support up to 300ma (t a 80c, 3. 5v v in 4.2v) and 275ma (t a 85c, 3. 5v v in 5.5v) of continu - ous current for powering 5.0v devices in portable handheld equipment including compact flash and cf+ products. the SC632A 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, 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 con - tinuous 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 for input steps of up to 20mv. decouple the input to prevent steps greater than 20mv, for optimum transient performance, when the input voltage reaches the mode transition thresholds. thermal resistance the SC632A 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 SC632A 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 v in supply range and ambient temperature range of the application should be compared with the following derating curve to determine the maximum safe continu - ous load current. the dc operating points beneath each curve are in the safe operating temperature range of the mlp package. 150 200 250 300 350 400 450 35 45 55 65 75 85 95 105 ambient temp ( c ) i o u t ( m a ) derating for v in < 4 . 2 v derating for v in < 5 . 5 v maximum continuous output protection circuitry the SC632A 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. ? ? ? applications information http://www..net/ datasheet pdf - http://www..net/
SC632A 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 that prevents the device from re-enabling until the junc - tion temperature is reduced by 20c. capacitor selection the SC632A 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 dieletric 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 capaci - tors will increase output resistance by 2.5? compared to 0.47f and larger values. so, at 00ma output the .5x to 2x mode transition will be 200mv higher. 0. c , c 2 note: use only x5r type capacitors, with a 6.3v rating or higher http://www..net/ datasheet pdf - http://www..net/
SC632A 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 632 a out c 2 + c 2 - c 1 + c 1 - gnd c 2 gnd en c 1 http://www..net/ datasheet pdf - http://www..net/
SC632A 3 outline drawing mlpd-ut-8 2x2 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 http://www..net/ datasheet pdf - http://www..net/
SC632A 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 . 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 SC632A 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. http://www..net/ datasheet pdf - http://www..net/

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