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august 2015 ? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator features ? input voltage range: 2. 5 v to 4 .50 v ? output voltages range: 3 .0 v to 5 .0 v ? i out 1 a at v out = 5.0 v, v in 2.5 v ? i out 1.5 a at v out = 5.0 v, v in 3.0 v ? up to 94% efficient ? int ernal synchronous rectification ? soft - start with true load disconnect ? short - circuit protection ? 9 - bump, 1.215 mm x 1.215 mm, 0.4 mm pitch wlcsp ? three external components: 2016 0.47 ? h inductor, 0603 case size input / output capacitors ? total application b oar d s olution s ize : < 11 mm 2 applications ? class - d audio amplifier and usb otg supply ? boost for low - voltage li - ion batteries ? smart phones, tablets, portable d evices , wearables description the FAN48610 is a low - power boost regulator designed to provide a minimum voltage - regulated rail from a standard single - cell li - ion battery and advanced battery chemistries. even below the minimum s ystem battery voltage , the device maintain s the output voltage regulation for a minimum output load current of 1.0 a. the co mbination of built - in power transistors, synchronous rectification, and low supply current suit the FAN48610 for battery - powered applications. the FAN48610 is available in a 9 - bump, 0.4 mm pitch, wafer - level chip - scale package (wlcsp). figure 1. typical applica tion ordering information part number v out operating temp erature package packing ( 1 ) device marking FAN48610uc50x 5.0 v - 40c to 85c wlcsp, 0.4 mm pitch tape and reel kf FAN48610buc50x ( 2 ) FAN48610buc45x ( 2 ) 4.5 v ka FAN48610buc33x ( 2 ) 3.3 v kn note s : 1. tape and r eel s pecifications are available on www.fairchildsemi.com . 2. i ncludes backside lamination. f a n 4 8 6 1 0 v o u t p g n d c o u t l 1 0 . 4 7 ? h 2 2 ? f v i n s w e n c i n + b a t t e r y s y s t e m l o a d a g n d 1 0 ? f
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 2 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator block diagrams figure 2. ic block diagram table 1. recommended components component description vendor parameter typ. unit l1 0.47 h, 3 0% , 2016 toko: dfe201612c dfr201612c cyntec: pife20161b l 0.47 h dcr (ser ies r) 4 0 m ? c in 10 f, 10%, 6.3 v, x5r, 0603 murata: grm188r60j 106 k tdk: c1608x5r0j 106 k c 10 f c out 22 f, 20%, 6.3 v, x5r, 0603 tdk: c1608x5r 0j226m c 22 f pin configuration figure 3. top view figure 4. bottom view pin definitions pin # name description a1, a2 vo ut output voltage . this pin is the output voltage terminal ; connect directly to c out . a3 vin input voltage . connect to li - ion battery input power source and the bias supply for the gate drivers. b1, b2 sw switching node . connect to inductor . b3 en enab le . when this pin is high , the circuit is enabled. c1, c2 pgnd power ground . this is the power return for the ic. c out capacitor should be returned with the shortest path possible to these pins. c3 agnd analog ground . this is the signal ground reference for the ic. all voltage levels are measured with respect to this pin C connect to pgnd at a single point. q 2 q 2 b q 2 a e n l 1 c o u t v o u t q 1 m o d u l a t o r l o g i c & c o n t r o l v i n s w c i n s y n c h r o n o u s r e c t i f i e r c o n t r o l p g n d a g n d vout en sw b1 b2 pgnd c1 c2 a1 a2 vin agnd b3 a3 c3 b3 b2 c3 c2 a3 a2 b1 a1 c1
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 3 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above th e recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress rati ngs only. symbol parameter min. max. unit v in voltage on vin pin - 0.3 6.0 v v out voltage on vout pin 6.0 v sw sw n ode dc - 0.3 6 .0 v transient: 10 ns, 3 m h z - 1 .0 8.0 v cc voltage on other p ins - 0.3 6.0 ( 3 ) v esd electrostatic discharge protection level human body model per jesd22 - a114 2 kv charged device model per jesd22 - c101 1 t j junction temperature - 40 +150 c t stg storage temperature - 65 +150 c t l lead soldering temperature, 10 seconds +260 c note: 3. lesser of 6.0 v or v in + 0.3 v. recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal performance to the dat asheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. max. unit v in supply voltage 2. 5 4.5 v i out maximum output current 1000 ma t a ambient temperature - 40 +85 c t j junction temperature - 40 +125 c thermal properties junction - to - ambient thermal resistance is a function of application and board layout. this data is measured with four - layer 2 s2p boards with vias in accordance to jedec standard jesd51. special attention must b e paid not to exceed junction temperature , t j(max) , at a given ambient temperat ure, t a . symbol parameter typical unit ? ja junction - to - ambient thermal resistance 5 0 c/w
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 4 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator electrical characteristics recommended operating conditions, unless otherwise noted, circuit per figure 1 , v out = 3.0 v to 5.0 v, v in = 2. 5 v to 4. 5 v , t a = - 40?c to 85?c . typical values are given v in = 3.6 v and t a = 25?c. symbol parameter conditions min. typ. max. unit power supply i q v in q uiescent c urrent v in =3.6 v, i out =0, en= v in 85 125 ? in =3.6 v 3 10 v uvlo under - v oltage lockout v in r ising 2 .2 2.3 v v uvlo_hys under - voltage lockout h ysteresis 150 mv inputs v ih enable high voltage 1. 05 v v il enable low voltage 0.4 v i pd current sink pull - down en pin , logic high 100 na r low low - state active pull - down en pin , logic low 200 300 4 00 k ou t puts v reg output voltage accuracy dc ( 4 ) referred to v out , 2.5 v v in v out - 150 mv - 2 4 % i lk_out v in - to - v out l eakage c urrent v out =0, en=0, v in =4.2 v 1 ? lk v out - to - v in r everse l eakage current v out =5 .0 v, en=0 , v in =2.5 v 3.5 ? trsp output voltage accuracy transient ( 5 ) referred to v out , 50 - 500 ma load step - 5 5 % timing f sw switching frequency v in =3.6 v, v out =5.0 v, load=1000 ma 2.0 2.5 3.0 mhz t ss soft - star t en high to regulation ( 5 ) 50 ? out = 5.0 v 600 ? rst fault restart timer ( 5 ) 20 ms power stage r ds(on)n n - channel b oost s witch r ds(on) v in =3.6 v, v out = 5 .0 v 8 0 130 m r ds(on)p p - channel sync. rectifier r ds(on) v in =3.6 v, v out = 5 .0 v 65 115 m v_lim boost v alley c urrent l imit v out =5 .0 v 3. 0 a i v_lim_ss boost soft - s tart v alley c urrent l imit v in 3 ? f. 5. guaranteed by design and characterization ; not tested in production.
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 5 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator typical characteristics unless otherwise specified; v in = 3.6 v, v out = 5 .0 v, t a = 25c , and circuit and co mponents according to figure 1 . figure 5. efficiency vs. load current and input voltage figure 6. efficiency vs. load current and temperature figure 7. efficiency vs. load current and input voltage , v out =3.3v figure 8. efficiency vs. load current and temp erature , v in =3.0v, v out =3.3v figure 9. output regulation vs. load current and input voltage (normalized to 3.6 vin, 500 ma load) figure 10. output regulation vs. load current and temperature (normalized to 3.6 vin, 500 ma load, ta=25c) 76% 80% 84% 88% 92% 96% 1 10 100 1000 efficiency load current (ma) 2.6 vin 3.0 vin 3.6 vin 4.2 vin 76% 80% 84% 88% 92% 96% 1 10 100 1000 efficiency load current (ma) - 40c +25c +85c 80% 84% 88% 92% 96% 10 100 1000 efficiency load current (ma) 2.5 vin 2.7 vin 3.0 vin 78% 82% 86% 90% 94% 98% 10 100 1000 efficiency load current (ma) - 40c +25c +85c - 2 - 1 0 1 2 3 0 250 500 750 1000 output regulation (%) load current (ma) 2.6 vin 3.0 vin 3.6 vin 4.2 vin - 2 - 1 0 1 2 0 250 500 750 1000 output regulation (%) load current (ma) - 40c +25c +85c
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 6 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator typical characteristics unless o therwise specified; v in = 3.6 v, v out = 5 .0 v, t a = 25c , and circuit and components according to figure 1 . figure 11. quiescent current vs. input voltage, temperature figure 12. output ripple vs. load current and input voltage figure 13. frequen cy vs. load current and input voltage figure 14. startup, 50 figure 15. overload protection figure 16. load transient, 100 - 500 ma, 100 ns edge 0 20 40 60 80 100 120 2.0 2.5 3.0 3.5 4.0 4.5 input current ( ? a) input voltage (v) - 40c auto +25c auto +85c auto 0 10 20 30 40 50 60 0 250 500 750 1000 output ripple (mvpp) load current (ma) 2.6 vin 3.0 vin 3.6 vin 4.2 vin 0 500 1,000 1,500 2,000 2,500 3,000 0 250 500 750 1000 switching frequency (khz) load current (ma) 2.6 vin 3.0 vin 3.6 vin 4.2 vin
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 7 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator typical characteristics unless otherwise specified; v in = 3.6 v, v out = 5 .0 v, t a = 25c , and circuit and components according to figure 1 . figure 17. load transient, 500 - 1000 ma, 100 ns edge figure 18. simultaneous line / load transient, 3.3 - 3.9 vin, 10 s edge, 500 - 1000 ma load, 100 ns edge figure 19. line transient, 3.3 - 3.9 v in , 10 ? s edge, 500 ma load figure 20. typical maximum out put current vs. input voltage 0.60 1.00 1.40 1.80 2.20 2.60 2.5 3.0 3.5 4.0 4.5 maximum output current (a) input voltage (v) +25c +85c
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 8 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator circuit description fan 48610 is a synchronous boost reg ulator, typically operating at 2.5 mhz in c ontinuous c onduction m ode (ccm), which occurs at moderate to heavy load current and low v in voltages. the regulator s pass - t hrough m ode automatically activates when v in is above the boost regulators set point . table 2. operating modes mode description invoked when: lin linear startup v in > v out ss boost soft - start v in < v out < v out(target) bst boost operating mode v out = v out (target) pt pass - t hrough mode v in > v out (target) boost mode regulation the fan 48610 uses a current - mode modulator to achieve excellent transient response and smooth transitions between ccm and dcm operation. during ccm operation, the device maintains a switching frequency of about 2.5 m h z. in light - load operation (dcm), frequency is naturally reduced to maintain high efficiency. shutdown and startup when en is low , all bias circuits are off and the regulator is in s hutdown m ode. during shutdown, current flow is prevented from vin to vout , as well as reverse flow from vout to vin . i t is recommended to keep load current dra w below 500 ma until the devices successfully executes startup . the following table describes the startup sequence. table 3. boost startup s equen ce start mode entry exit end mode timeout (s) lin1 v in > v uvlo , en=1 v out > v in - 300 mv ss timeout lin2 512 lin2 lin1 exit v out > v in - 300 mv ss timeout fault 1024 ss lin1 or lin2 exit v out =v out (target) bst overload timeout fault 64 lin mod e when en is high and v in > v uvlo , the regulator first attempts to bring v out within 300 m v of v in by using the internal fixed - current source from vin (q 2 ). th e current is limited to the lin1 set point . if v out reaches v in - 300 m v during lin1 mode , the ss m ode is initiated . o therwise, lin1 times out after 512 ? s and lin2 mode is entered. in lin2 mode , the curr ent source is incremented to 1.6 a . if v out fails to reach v in - 300 m v after 1024 ? s , a fault condition is declared and the device waits 20 ms to attem pt an automatic restart . soft - start ( ss ) mode upon the successful completion of lin mode (v out > v in - 300 m v), the regulator begins switching with boost pulses current limited to 50% of nominal level . during ss mode , i f v out fails to reach regulation during the ss ramp sequence for more than 64 ? s , a fault is declared. if large c out is used , the reference is automatically stepped slower to avoid excessive input current draw. boost (bst) mode this is a normal operati ng mode of the regulator. pass - through (pt ) mode in normal operation, the device automatically transitions from boost mode to pass - through mode if v in goes above the target v out . in pass - through mode, the devi ce fully enhances q2 to provide a very low impedance path from vin to vout. entry to the pass - through mode is triggered by condition where v in > v out and no switching has occurred during the past 5 s. to soften the entry in to pass - through mode, q2 is driven as a linear current source for the first 5 s . pass - through mode exit is triggered whe n v out reaches the target v out voltage. during automatic pass - through mode, the device is short - circuit protected by a voltage comparator tracking the voltage drop from v in to v out ; if the drop exceeds 3 00 mv, a fault is declared. fault state the regulator enters f ault s tate under any of the following conditions: ? v out fails to achieve the voltage required to advance from lin mode to ss mode . ? v out fails to achieve the voltage required to advance from ss mode to bst mode . ? boost current limit triggers for 2 ms during bst mode . ? v in C v out > 3 00 mv ; this fault can occu r only after successful comple tion of the soft - start sequence . ? v in < v uvlo . once a fault is triggered, the regulator stops switching and presents a high - impedance path between vin and vout . after wa iting 20 ms, a n automatic restart is attempted. over - t emperature the regulator shut s down if the die temperature exceeds 150c. restart occur s when the ic has cooled by approximately 2 0c.
? 2013 fairchild semiconductor corporation www.fairchildsemi.com FAN48610 ? rev. 1.5 9 FAN48610 2.5 mhz, fixed - output synchronous tinyboost? regulator application information output capacitance (c out ) the effectiv e capacitance (c e f f ( 6 ) ) of small, high - value ceramic capacitors decreases as their bias voltage increases , as illustrated in the graph below: figure 21. c eff for 22 ? FAN48610 is g uaranteed for stable operation with the minimum value of c eff (c eff(min ) ) outlined in table 4 . table 4. minimum c eff required for stability operating conditions c eff(min) ( ? out (v) v in (v) i load ( m a ) 5 .0 2. 5 to 4.5 0 to 1000 3.0 note: 6. c eff varies by manufacturer, capacitor material , and case size. inductor s election recommended nominal inductance value is 0.47 ? h. the FAN48610 employs valley - current limiting , so peak inductor current can reach 3. 8 a for a short duration during o verload conditions. saturation effects cause the inductor current ripple to become higher under high loading , as only the valley of the inductor current ripple is controlled. startup input current limiting is in effect during soft - start, which limits the c urrent available to charge c out and any additional capacitance on the v out line. if the output fails to achieve regulation within the limits described in the s oft - s tart section above, a fault occurs, causing the circuit to shut down . it wait s a bout 20 ms b efore attempting a restart. if the total combined output capacitance is very high, the circuit may not start on the first attempt, but eventually achieve s regulation if no load is present. if a high current load and high capacitance are both present during soft - start, the circuit may fail to achieve regulation and continually attempt soft - start, only to have the output capacitance discharged by the load when in fault s tate. output voltage ripple output voltage ripple is inversely proportional to c out . dur ing t on , when the boost switch is on, all load current is supplied by c out . and eq. 1 t herefore : eq. 2 eq. 3 eq. 4 t he maximum v ripple occurs when v in is minimum and i load is maximum. for better ripple performance , more output capacitance can be added. layout re commendations the layout recommendations below highlight various top - copper p ours by using different colors. to minimize spikes at vout , c out must be placed as close as possible to pgnd and vout , as shown below. for thermal reasons , it is suggested to ma ximize t he pour area for all planes other than sw. especially the ground pour should be set to fill all available pcb surface area and tied to internal layers with a cluster of thermal vias. figure 22. layout recommendation product - specific dimensions (this table pertains to the package information on the following page.) d e x y 1.2 1 5 0.030 mm 1.21 5 0.030 mm 0.20 75 mm 0.20 75 mm ? ? ? ? ? ? ? ? ? ? ? ? ? out in sw sw on v v t d t t 1 out ) ( 1 c i v v t v load out in sw p p ripple ? ? ? ? ? ? ? ? ? ? ? ? ? sw sw f t 1 ? 0 5 10 15 20 25 0 1 2 3 4 5 6 capacitance ( ? f) dc bias voltage (v) out ) ( c i t v load on p p ripple ? ? ?
notes a. no jedec registration applies. b. dimensions are in millimeters. c. dimensions and tolerance per asme y14.5m, 2009. d. datum c is defined by the spherical crowns of the balls. e. for dimensions d,e,x, and y see product datasheet. f. drawing filname: mkt-uc009ak rev3 bottom view side views top view recommended land pattern ball a1 index area 1 2 a b c seating plane 9x 0.005 c a b e (nsmd pad type) ?? 0.40 0.40 ;? <? 0.06 c 0.05 c d e 0.03 c 2x 0.03 c 2x e d b c a 3 ? ? a1 ? cu pad (bottom) ? solder mask 0.40 0.40 ?
www. onsemi.com 1 on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent ? marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does o n semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typic als? must be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 www.onsemi.com literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative ? semiconductor components industries, llc

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