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vishay siliconix sip12502 document number: 73578 s09-1456-rev. b, 03-aug-09 www.vishay.com 1 500 ma - fixed output boost converter for single or dual cell description sip12502 is a boost converter ic with fixed output voltage for single or double cell nimh or alkaline battery pack. featuring with an internal low resistance power mosfet, it is capable of starting up with a low battery voltage of 0.85 v. it only needs four external components (an inductor, a diode and two capacitors) to construct a step-up converter. for best efficiency performance, it is designed to operate in pwm mode with a 300 khz switching frequency under normal load and in pfm mode under light load. the voltage-mode control loop is internally compensated, simplifying converter design and reducing external parts count. it accepts input voltages from 0.85 v to 5 v, providing fixed output voltages of 2.0 v, 3.3 v, and 5.0 v. it also feat ures low shutdown current of under 1 a, over voltage protection, thermal shutdown protection, a power good output and antiringing control to minimize emi. sip12502 is available in a l ead (pb)-free 6-pin, powerpak mlp33 package and is specified to operate over the industrial temperature range of - 40 c to 85 c. features ? voltage mode control with internal frequency compensation ? 0.85 v to 5.0 v input voltage range ? fixed output voltage options - 2.0 v, 3.3 v, and 5.0 v ? other voltages available upon request ? pwm control with 300 kh z fixed switching frequency ? pfm control for light load ? powered from the output voltage supply ? integrated uvlo and soft-start ? logic controlled shutdown (< 1 a) ? 85 % typical efficiency ? internal power mos switch: 0.2 at 3.3 v output ? antiringing switch to minimize emi ? power good output ? shutdown input ? minimum external components ? powerpak ? mlp33-6 package, (dfn-6, 3 x 3) ? over voltage protection applications ? portable applications ? battery-powered equipment ? handheld devices ? digital cameras ? wireless handsets ? lcd and oled bias typical application circuit xshd lx sip12502 v out v in pgood gnd 1 3 6 4 2 5 10 h xshd 10 f v in 47 f mbr0520 330 k pgood v out
www.vishay.com 2 document number: 73578 s09-1456-rev. b, 03-aug-09 vishay siliconix sip12502 notes: a. derate 20 mw/c above 70 c. b. device mounted with all leads soldered or welded to pc board. stresses beyond those listed under ?absolute maximum ratings? ma y cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other condit ions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. absolute maximum ratings (all voltages referenced to gnd = 0 v) parameter limit unit input voltage, v in - 0.3 to 6 v lx voltage - 0.3 to v out + 0.5 output voltage, v out - 0.3 to 6 xshd voltage - 0.3 to v in + 0.5 pgood voltage - 0.3 to 6 maximum junction temperature 150 c storage temperature - 55 to 150 operating junction temperature 125 power dissipation a powerpak mlp33-6 (t a = 70 c) a 1100 mw thermal resistance b powerpak mlp33-6 50 c/w recommended operating range (all voltages referenced to gnd = 0 v) parameter limit unit input voltage, v in 0.85 to 5.0 v output voltage, v out 2.0 to 5 xshd voltage 0 to v in lx voltage 0 to v out + 0.5 pgood voltage 0 to 5 operating temperature range - 40 to 85 c specifications parameter symbol test conditions unless specified v in = 1.2 v, v out = v nom e , t a = 25 c temp. a limits unit min. b typ. c max. b minimum start-up voltage v start i load = 1 ma full 0.65 0.85 v minimum operating voltage d vh old xshd = v in 0.55 output voltage accuracy v out - 1.5 + 1.5 % - 25 c to 85 c - 3.0 + 3.0 full - 3.5 + 3.5 uvlo v uvlo rising v out full 1.8 2 v uvlo hysteresis v uvlohyst full 0.100 maximum pwm duty cycle maxdty full 80 87 % pwm switching frequency f osc full 225 300 375 khz
document number: 73578 s09-1456-rev. b, 03-aug-09 www.vishay.com 3 vishay siliconix sip12502 notes: a. full = - 40 c to 85 c. b. the algebraic convention whereby the mo st negative value is a minimum and the most positive a maximum (- 40 c to 85 c). c. typical values are for design aid only, not guaranteed nor subject to production testing. d. minimum operating voltage is determined by the battery?s capability to prov ide energy as it is deeply discharged. e. v nom equals voltage output for part selected. specifications parameter symbol test conditions unless specified v in = 1.2 v, v out = v nom e , t a = 25 c temp. a limits unit min. b typ. c max. b supply current 1 i out1 v out = v nom x 0.95 full 330 620 a supply current 2 i out2 v out = 6 v, v nom + 0.6 v, v lx > v in 150 supply current 3 i out3 v out = v nom + 0.5 v, v lx < v in 75 stand-by current i stb xshd = 0 v, not including switch leakage full 1 nmos switch leakage i leak lx = 5 v 12 full 10 nmos switch on resistance r ds(on) v out = 3.3 v 0.2 pwm to pfm current threshold i wtof 3 ma pfm to pwm current threshold i ftof 22 xshd input high level v xshdh 0.8 v v in 0.9 v full 0.55 v 0.9 v < v in 2 v full 0.8 2 v < v in 5 v full 1.2 xshd input low level v xshdl full 0.2 softstart time t start v in = 1.8 v 1.6 ms over voltage threshold v ov 110 % over voltage hysteresis v ovhyst 10 thermal shutdown t shd 160 c thermal shutdown hysteresis t hyst 20 pgood threshold v pgood 85 90 95 % pgood hysteresis v pgoodhyst 2 pgood output voltage low pg goodl v out = 3.3 v, i pgood = 1 ma full 0.15 0.2 v pgood output leakage current pg good v pgood = 5 v full 0.01 1 a
www.vishay.com 4 document number: 73578 s09-1456-rev. b, 03-aug-09 vishay siliconix sip12502 pin configuration and truth table pin functions xshd (pin 1) xshd is a logic-level shutdown control pin. when xshd is low, the ic?s switching is disabled and an antiringing switch is connected between lx and v in . when xshd is high, the ic is working in normal operation. v in (pin 2) v in is the pin connected to the battery input voltage. at start- up, sip12502 is powered from the voltage at the v in pin. once v out exceeds v in , the sip12502 is powered from v out . this increases the drive to the gate of the internal power switch, to allow higher maximum output currents and higher converter efficiency. v out (pin 3) v out is the output of the boost converter and also the power source for the ic. pgood (pin 4) pgood is the open-drain out put pin of the power good comparator. it is low when v out is 10 % lower than its regulation voltage. after the soft start is finished and v out is higher than 90 % of its regulation voltage, pgood will go high. its hysteresis is 2 %. gnd (pin 5) gnd is the ground pin for signal and power ground. lx (pin 6) lx is connects to the drain of the internal power mosfet (boost switch). externally, the lx pin should be connected to the boost inductor and schottky diode. if the inductor current falls to zero, or xshd is low, an internal antiringing switch is connected from lx to v in to minimize emi. 2 3 6 5 4 1 powerpak mlp33-6 top view v in xshd gnd lx v out pgood ordering information part number voltage output temperature range marking SIP12502DMP-20-E3 2.0 v - 40 c to 85 c 502a sip12502dmp-33-e3 3.3 v 502e sip12502dmp-50-e3 5.0 v 502g pin description pin number name function 1 xsdh logic controlled shutdown input, xshd = high: normal operation, xshd = low: shutdown 2 v in input voltage 3 v out output of the boost converter and power source for the ic battery 4 pgood power good comparator output 5 gnd signal and power ground 6 lx switch pin
document number: 73578 s09-1456-rev. b, 03-aug-09 www.vishay.com 5 vishay siliconix sip12502 functional block diagram detailed operation sip12502 is a 300 khz boost converter ic, packaged in 6-pin mlp33 powerpak tm package. with start-up from input voltages as low as 0.65 v, this device features fixed frequency voltage mode pwm control with internal frequency compensation. with its low r ds(on) internal power mosfet, this device maintains high efficiency over a wide range of load currents. under light load co nditions, it switches to pfm mode to maintain high efficiency. a power good signal is available to monitor the output voltage. low voltage start-up sip12502 is designed to start-up at input voltage of typically 0.65 v. at start-up, v out is lower than v in due to the voltage drop of the schottky diode. th erefore, the device uses v in as the power source for its control logic and internal gate drive, until v out exceeds v in . during the start-up interval, the boost switch?s conduction in terval during each cycle is determined by the time taken for the inductor current to reach internal current limit, followed by a fixed off time before the switch is allowed to turn on again. once v out exceeds v in , the device uses v out as the ic?s power source. when v out exceeds 1.89 v, the device engages its built-in soft-start circuitry. soft-start during soft-start, the loop co mpensation guarantees the slow increase of output voltage, so that no large voltage overshoot or inrush current transients occur when the soft-start period ends. pwm operation after the soft-start interval is over, the device works in pwm operation with a fixed frequency of 300 khz, with automatic switch-over to pfm operation during light load conditions. pfm operation when operating into light load s, the sip12502 automatically switches to pfm operation. this reduces gate charge losses in the boost switch, hence raising converter efficiency. over voltage protection if the output voltage is above 10 % of the regulation voltage, the device will turn off the internal power mosfet and wait until the output voltage falls below the regulation voltage, then the pwm operation is enabled again. thermal shutdown protection if the internal device temperature rises above 160 c, the device will turn off the internal power mosfet. once the die temperature falls below 140 c, the device performs a new soft-start cycle, the converte r resumes normal operation. antiringing control the antiringing control circ uitry prevents high frequency ringing at the lx pin as the inductor current goes to zero by damping the resonant circuit formed by l and c lx (capacitance on lx pin). when the ic is shutdown, this antiringing switch is also turned on.
www.vishay.com 6 document number: 73578 s09-1456-rev. b, 03-aug-09 vishay siliconix sip12502 typical characteristics supply current 1 vs. temperature frequency vs. temperature r ds(on) vs. output voltage 0.20 0.25 0.30 0.35 0.40 - 50 - 30 - 10 10 30 50 70 90 temperature (c) ) a m ( 1 t n e r r u c y l p p u s 250 260 270 280 290 300 310 320 - 50 - 30 - 10 10 30 50 70 90 ) z h k ( y c n e u q e r f temperature (c) 0.00 0.05 0.10 0.15 0.20 0123456 v out (v) r ) n o ( s d supply current 2 vs. temperature maximum pwm duty cycle vs. temperature shutdown input voltage threshold vs. v in - 50 - 30 - 10 10 30 50 70 90 temperature (c) ) a m ( 2 t n e r r u c y l p p u s 0.140 0.145 0.150 0.155 0.160 0.165 0.170 0.175 0.180 83 84 85 86 87 88 89 90 91 92 93 - 60 - 40 - 20 0 20 40 60 80 100 e l c y c y t u d % temperature (c) 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 e g a t l o v t u p n i n w o d t u h s ) v ( d l o h s e r h t v in (v)
document number: 73578 s09-1456-rev. b, 03-aug-09 www.vishay.com 7 vishay siliconix sip12502 typical characteristics shutdown threshold vs. temperature v in = 1.2 v, v out = 2 v v in = 2.4 v, v out = 5 v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 - 50 - 30 - 10 10 30 50 70 90 temperature (c) ) v ( d l o h s e r h t n w o d t u h s v in = 5.0 v v in = 2.0 v v in = 0.8 v 0 10 20 30 40 50 60 70 80 90 0.1 1 10 100 1000 load current (ma) ) % ( y c n e i c i f f e 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 load current (ma) ) % ( y c n e i c i f f e v out voltage vs. temperature v in = 2.4 v, v out = 3.3 v - 4 - 3 - 2 - 1 0 1 2 3 4 - 50 - 30 - 10 10 30 50 70 90 v t u o ) % ( y c a r u c c a e g a t l o v temperature (c) 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 load current (ma) ) % ( y c n e i c i f f e
www.vishay.com 8 document number: 73578 s09-1456-rev. b, 03-aug-09 vishay siliconix sip12502 typical waveforms vishay siliconix maintains worldwide manufacturing capability. products may be manufactured at one of several qualified locatio ns. reliability data for silicon technology and package reliability represent a composite of all qualified locations. for related documents such as package/tape drawings, part marking, and reliability data, see www.vishay.com/ppg?73578 . typical switching waveform pwm mode v in = 1.2 v, v out = 3.3 v, load current = 150 ma, l = 10 h; c out = 47 f soft start and pgood v in = 1.2 v, v out = 3.3 v, load current = 50 ma, l = 10 h; c out = 47 f 1 s/div v out 50 mv/div lx 2 v/div 5 ms/div pgood 1 v/div v out 1 v/div typical switching waveform pfm mode v in = 1.2 v, v out = 3.3 v, load current = 10 ma, l = 10 h; c out = 47 f 100 s/div v out 20 mv/div lx 2 v/div
???? ???? ???? ???? ?? ?? c 0.08 c bbb m a a c ddd m 7 4 9 9 8 6 11 7 8 5 c ccc // nx detail c a1 a c aaa 2 x c aaa 2 x pin 1 mark 1 l2 e b a d l2 nxk e2 e2/2 d2/2 (nd-1) x e d2 n-1 bottom view see detail b n see detail a detail d detail c a1 r r2 l e 12 exposed pad (optional) side view a2 a3 nx b c seating plane detail d topview 4 x 5 10 datum a or b datum a or b nx r1 l2 pin tip 5 pin tip e odd pin/side detail b even pin/side e e/2 l nx r1 detail a edge of plastic body exposed metalized feature this feature applies to both ends of the package exposed slug/heat sink l2 l1 b 0.17 min 0.17 0.30 package information vishay siliconix document number: 72820 28-jan-04 www.vishay.com 1 powerpak mlp33-6, 8 and 10 (power ic only)
notes: 1. dimensioning and tolerancing conform to asme y14.5m-1994. 2. all dimensions are in millimeters. all angels are in degrees. 3. n is the total number of pins. 4. the pin #1 identifier and pin numbering convention shall conform to jesd 95-1 spp-012. details of pin #1 identifier is locat ed within the zone indicated. the pin #1 identifier is marked. 5. dimension b applies to metallized pin and is measured between 0.15 mm and 0.20 mm from the pin tip. 6. nd refers to the maximum number of pins on the d side. 7. depopulation of pins is allowed and will be called out on the individual variation. 8. coplanarity applies to the exposed heat sink slug as well as the pins. 9. profile tolerance (aaa) will be applicable only to the plastic body and not to the metallized features (such as the pin tips and tie bars.) metallized features may protrude a maximum of l2 from the plastic body profile. 10. l1 max is not called out, the metallized feature will extend to the exposed pad. thus, the 0.17-mm gap does not apply. 11. the corner will be sharp unless otherwise specified with radius dimensions. package information vishay siliconix www.vishay.com 2 document num ber: 72820 28-jan-04 powerpak mlp33-6, 8, 10 n = 6 pitch: 0.95 mm n = 8 pitch: 0.65 mm n = 10 pitch: 0.50 mm millimeters* inches dim basic min nom max basic min nom max notes a ? 0.80 0.90 1.00 ? 0.031 0.035 0.039 1, 2 a1 ? 0.00 0.025 0.05 ? 0.000 0.001 0.002 1, 2 a2 ? 0.65 0.70 0.75 ? 0.026 0.028 0.030 1, 2 a3 ? 0.15 0.20 0.25 ? 0.006 0.008 0.010 1, 2 aaa ? ? 0.10 ? ? ? 0.004 ? 1, 2 b-6 ? 0.33 0.35 0.43 ? 0.013 0.014 0.017 1, 2, 8 b-8 ? 0.285 0.305 0.385 ? 0.011 0.012 0.015 1, 2, 8 b-10 ? 0.18 0.20 0.28 ? 0.007 0.008 0.011 1, 2, 8 bbb ? ? 0.10 ? ? ? 0.004 ? 1, 2 ccc ? ? 0.10 ? ? ? 0.004 ? 1, 2 d 3.00 ? ? ? 0.118 ? ? ? 1, 2, 8 d2 ? 1.92 2.02 2.12 ? 0.076 0.080 0.083 1, 2, 8 ddd ? ? 0.05 ? ? 0.002 1, 2 e 3.00 ? ? ? 0.118 ? ? ? 1, 2, 8 e2 ? 1.10 1.20 1.30 ? 0.043 0.047 0.051 1, 2, 8 e-6 ? ? 0.95 ? ? ? 0.037 ? 1, 2 e-8 ? ? 0.65 ? ? ? 0.026 ? 1, 2 e-10 ? ? 0.50 ? ? ? 0.020 ? 1, 2 k ? 0.20 ? ? ? 0.008 ? ? 5, 11 l ? 0.20 0.29 0.45 ? 0.008 0.011 0.018 1, 2, 8 l1-6 ? 0.16 0.24 0.40 ? 0.006 0.009 0.016 1, 2, 8 l1-8 ? 0.16 0.24 0.40 ? 0.006 0.009 0.016 1, 2, 8 l1-10 ? ? ? ? ? ? ? ? 1, 2, 8 l2 ? ? ? 0.125 ? ? ? 0.005 5, 11 r ref ? ? 0.15 ? ? ? 0.006 ? 1, 2, 8 r1 ref-6 ? ? 0.127 ? ? ? 0.005 ? 1, 2, 8 r1 ref-8 ? ? 0.15 ? ? ? 0.006 ? 1, 2, 8 r1 ref-10 ? ? 0.075 ? ? ? 0.003 ? 1, 2, 8 ? 0 10 12 ? 0 10 12 1, 2 * use millimeters as the primary measurement. ecn: s-40082?rev. a, 02-feb-04 dwg: 5925
document number: 91 000 www.vishay.com revision: 11-mar-11 1 disclaimer legal disclaimer notice vishay all product, product specifications and data ar e subject to change without notice to improve reliability, function or design or otherwise. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectivel y, vishay), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained in any datasheet or in any o ther disclosure relating to any product. vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. to the maximum extent permitted by applicab le law, vishay disc laims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, incl uding without limitation specia l, consequential or incidental dama ges, and (iii) any and all impl ied warranties, including warran ties of fitness for particular purpose, non-infringement and merchantability. statements regarding the suitability of pro ducts for certain types of applications are based on vishays knowledge of typical requirements that are often placed on vishay products in gene ric applications. such statements are not binding statements about the suitability of products for a partic ular application. it is the customers responsibility to validate that a particu lar product with the properties described in th e product specification is su itable for use in a particul ar application. parameters provided in datasheets an d/or specifications may vary in different applications and perfo rmance may vary over time. all operating parameters, including typical pa rameters, must be validated for each customer application by the customers technical experts. product specifications do not expand or otherwise modify vishays term s and conditions of purchase, including but not limited to the warranty expressed therein. except as expressly indicated in writing, vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the vishay product co uld result in person al injury or death. customers using or selling vishay products not expressly indicated for use in such applications do so at their own risk and agr ee to fully indemnify and hold vishay and it s distributors harmless from and against an y and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that vis hay or its distributor was negligent regarding the design or manufact ure of the part. please contact authorized vishay personnel t o obtain written terms and conditions regarding products designed fo r such applications. no license, express or implied, by estoppel or otherwise, to any intelle ctual property rights is gran ted by this document or by any conduct of vishay. product names and markings noted herein may be trademarks of their respective owners.

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