View FAN5361-10_8351238.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

december 2010 ? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator fan5361 6mhz, 600ma / 750ma synchronous buck regulator features ? 6mhz fixed-frequency operation ? 35a typical quiescent current ? best-in-class load transient response ? best-in-class efficiency ? 600ma or 750ma output current capability ? 2.3v to 5.5v input voltage range ? 1.0 to 1.90v fixed output voltage ? low ripple light-load pfm mode ? forced pwm and external clock synchronization ? internal soft-start ? input under-voltage lockout (uvlo) ? thermal shutdown and overload protection ? 6-bump wlcsp, 0.4mm pitch ? 6-pin 2 x 2mm umlp applications ? cell phones, smart phones ? tablets, netbooks ? , ultra-mobile pcs ? 3g, lte, wimax?, wibro ? , and wifi ? data cards ? gaming devices, digital camerasdc/dc micro modules description the fan5361 is a 600ma or 750ma, step-down, switching voltage regulator that delivers a fixed output from a 2.3v to 5.5v input voltage supply. using a proprietary architecture with synchronous rectification, the fan5361 is capable of delivering a peak efficiency of 92%, while maintaining efficiency over 80% at load currents as low as 1ma. the regulator operates at a nominal fixed frequency of 6mhz, which reduces the value of the external components to 470nh for the output inductor and 4.7f for the output capacitor. the pwm modulator can be synchronized to an external frequency source. at moderate and light loads, pulse frequency modulation is used to operate the device in power-save mode with a typical quiescent current of 35a. even with such a low quiescent current, the part exhibits excellent transient response during large load swings. at higher loads, the system automatically switches to fixed-frequency control, operating at 6mhz. in shutdown mode, the supply current drops below 1a, reducing power consumption. for applications that require minimum ripple or fixed frequency, pfm mode can be disabled using the mode pin. the fan5361 is available in 6-bump, 0.4mm pitch, wafer- level chip-scale package (wlcsp) and a 6-lead 2 x 2mm ultra-thin mlp package (umlp). typical applications figure 1. typical applications all trademarks are the property of their respective owners.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 2 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator ordering information part number output voltage (1) package temperature range packing fan5361uc123x 1.233v wlcsp-6, 0.4mm pitch ?40 to +85c tape and reel fan5361uc182x 1.820v fan5361ump123x 1.233v 6-lead, 2 x 2mm umlp fan5361ump15x 1.500v fan5361ump182x 1.820v note: 1. other voltage options available on request. contact a fairchild representative. pin configurations c1 b1 a1 c2 b2 a2 mode sw fb vin en gnd figure 2. wlcsp, bumps facing down figure 3. wlcsp, bumps facing up figure 4. umlp, leads facing down pin definitions pin # name description wlcsp umlp a1 3 mode mode . logic 1 on this pin forces the ic to stay in pwm mode. a logic 0 allows the ic to automatically switch to pfm during light loads. the regulator also synchronizes its switching frequency to four times the frequency provided on this pin. do not leave this pin floating. b1 2 sw switching node . connect to output inductor . c1 1 fb feedback / v out . connect to output voltage. c2 6 gnd ground . power and ic ground. all signals are referenced to this pin. b2 5 en enable . the device is in shutdown mode when voltage to this pin is <0.4v and enabled when >1.2v. do not leave this pin floating. a2 4 vin input voltage . connect to input power source.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 3 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator absolute maximum ratings stresses exceeding the absolute maximum ratings may damage t he device. the device may not function or be operable above the 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 ratings only. symbol parameter min. max. unit v in input voltage ?0.3 7.0 v v sw voltage on sw pin ?0.3 v in + 0.3 (2) v v ctrl en and mode pin voltage ?0.3 v in + 0.3 (2) v other pins ?0.3 v in + 0.3 (2) v esd electrostatic discharge protection level human body model per jesd22-a114 4.0 kv charged device model per jesd22-c101 1.5 t j junction temperature ?40 +150 c t stg storage temperature ?65 +150 c t l lead soldering temperature, 10 seconds +260 c note: 2. lesser of 7v or v in +0.3v. recommended operating conditions the recommended operating conditions table defines the condi tions for actual device operation. recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit v cc supply voltage range 2.3 5.5 v i out output current 0 600 ma l inductor 0.47 h c in input capacitor 2.2 f c out output capacitor 1.6 4.7 12.0 f t a operating ambient temperature ?40 +85 c t j operating 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 1s2 p boards in accordance to jedec standard j esd51. special attention must be paid not to exceed junction temperature t j(max) at a given ambient temperate t a . symbol parameter typical unit ja junction-to-ambient thermal resistance wlcsp 150 c/w umlp 49 c/w
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 4 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator electrical characteristics minimum and maximum values are at v in = v en = 2.3v to 5.5v, v mode = 0v (auto mode), t a = -40c to +85c; circuit of figure 1, unless otherwise noted. typical values are at t a = 25c, v in = v en = 3.6v. symbol parameter conditions min. typ. max. unit power supplies i q quiescent current no load, not switching 35 55 a pwm mode 6 ma i (sd) shutdown supply current v in = 3.6v, en = gnd 0.05 1.00 a v uvlo under-voltage lockout threshold rising v in 2.15 2.25 v v uvhyst under-voltage lockout hysteresis 150 mv logic inputs: en and mode pins v ih enable high-level input voltage 1.2 v v il enable low-level input voltage 0.4 v v lhyst logic input hysteresis voltage 100 mv i in enable input leakage current pin to v in or gnd 0.01 1.00 a switching and synchronization f sw switching frequency (3) v in = 3.6v, t a = 25c 5.4 6.0 6.6 mhz f sync mode synchronization range (3) square wave at mode input 1.3 1.5 1.7 mhz regulation v o output voltage accuracy 1.900v i load = 0 to 750ma 1.862 1.900 1.957 v pwm mode 1.862 1.900 1.938 1.820v i load = 0 to 600ma 1.784 1.820 1.875 pwm mode 1.784 1.820 1.856 1.500v i load = 0 to 600ma 1.470 1.500 1.545 pwm mode 1.470 1.500 1.530 1.233v i load = 0 to 600ma 1.207 1.233 1.272 pwm mode 1.207 1.233 1.259 t ss soft-start from en rising edge 180 300 s output driver r ds(on) pmos on resistance v in = v gs = 3.6v 350 m nmos on resistance v in = v gs = 3.6v 225 i lim(ol) pmos open-loop peak current limit v out = 1.233v, 1.5v, 1.82v 900 1100 1250 ma v out = 1.9v 1375 t tsd thermal shutdown ccm only 150 c t hys thermal shutdown hysteresis 15 c notes: 3. limited by the effect of t off minimum (see figure 14 and figure 15 in typical performance characteristics) . 4. the electrical characteristics table reflects open-loop data. refer to operation description and typical characteristics for closed-loop data.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 5 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c. 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 1 10 100 1000 i load output current (ma) efficiency auto 2.3vin auto 2.7vin auto 3.6vin auto 4.2vin 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 1 10 100 1000 i load output current (ma) efficiency 25c 85c -30c figure 5. efficiency vs. load current and input supply figure 6. efficiency vs. load current and temperature 1 10 100 1000 i load output current (ma) efficiency vin=2.3v vin=2.7v vin=3.6v vin=4.2v 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100 % 1 10 100 1000 i load output current (ma) efficiency auto pfm/pwm forced pwm figure 7. 1.233v out efficiency vs. load current and supply figure 8. efficiency, auto pwm/pfm vs. forced pwm 1.80 1.81 1.82 1.83 1.84 0 100 200 300 400 500 60 0 load current (ma) vin=2.3v vin=2.7v vin=3.6v vin=4.2v v out (v) 1.223 1.228 1.233 1.238 1.243 1.248 0.00.10.20.30.40.50.6 i load output current (a) v out (v) vin=2.3v vin=2.7v vin=3.6v vin=4.2v figure 9. load regulation figure 10. 1.233v out load regulation vs. input supply
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 6 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c. 1.805 1.810 1.815 1.820 1.825 1.830 1 10 100 1,000 i load output current (ma) v out (v) auto pwm/pfm forced pwm 0 5 10 15 20 25 30 35 40 45 0 100 200 300 400 500 600 load current (ma) vout (mvpp) 3.6vin 5.5vin 2.5vin figure 11. load regulation, auto pfm / pwm and forced pwm figure 12. 1.82v out peak-to-peak output voltage ripple 0 5 10 15 20 25 30 0 100 200 300 400 500 600 load current (ma) vout (mvpp) 3.6vin 5.5vin 2.5vin 1 2 3 4 5 6 7 0 0.10.20.30.40.50.6 load current (a) switching frequency (mhz) vin>2.9v vin=2.7v vin=2.5v vin=2.3v fpwm mode figure 13. 1.233v out peak-to-peak output voltage ripple figure 14. effect of t off(min) on reducing switching frequency 0 1 2 3 4 5 6 7 0 0.1 0.2 0.3 0.4 0.5 0.6 load current (a) switching frequency (mhz) vin>2.4v vin=2.3v fpwm mode 0 50 100 150 200 250 300 350 2.5 3.0 3.5 4.0 4.5 5.0 5.5 input voltage (v) load current (ma) pfm border pwm border always pfm the switching mode changes at these borders always pwm figure 15. 1.233v out effect of t off(min) on reducing switching frequency figure 16. pfm / pwm boundaries
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 7 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c. always pfm the switching mode changes at these borders always pwm 0 50 100 150 200 250 2.5 3.0 3.5 4.0 4.5 5.0 5.5 input voltage(v) load current (ma) pfm bo r de r pw m bo r de r 30 32 34 36 38 40 42 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v in input voltage (v) quiescent current ( a) ven=vin ven=1.8v figure 17. 1.233v out pfm / pwm boundaries figure 18. quiescent current vs. input voltage 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 -40-200 20406080 ambient temperature (c) supply current (a) v in =5.5v v en =0v figure 19. shutdown current vs. temperature
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 8 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c, 5s/div. horizontal sweep. figure 20. line transient 3.3v in to 3.9v in , 50ma load, 10s/div. figure 21. line transient 3.3v in to 3.9v in , 250ma load, 10s/div. figure 22. combined line/load transient 3.9 to 3.3v in combined with 40ma to 400ma load transient figure 23. combined line/load transient 3.3 to 3.9v in combined with 400ma to 40ma load transient figure 24. load transient 0 to 150ma, 2.5v in figure 25. load transient 50 to 250ma, 2.5v in
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 9 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c, 5s/div. horizontal sweep. figure 26. load transient 150 to 400ma, 2.5v in figure 27. load transient 0 to 150ma, 3.6v in figure 28. load transient 50 to 250ma, 3.6v in figure 29. load transient 150 to 400ma, 3.6v in figure 30. load transient 0 to 150ma, 4.5v in figure 31. load transient 50 to 250ma, 4.5v in figure 32. load transient 150 to 400ma, 4.5v in
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 10 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c, 5s/div. horizontal sweep. figure 33. metallic short applied at v out , 50 s/div. figure 34. metallic short applied at v out figure 35. over-current fault response, r load = 1 ? , 50 s/div. figure 36. over-current fault response, r load = 1 ? figure 37. overload recovery to light load, 50 s/div. figure 38. soft-start, r load = 50 ? , 20 s/div.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 11 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator typical performance characteristics (continued) unless otherwise noted, v in = v en = 3.6v, v mode = 0v (auto mode), v out = 1.82v, t a = 25c. figure 39. sw-node jitter (infinite persistence), i load = 200ma, 50ns/div. figure 40. power supply rejection ratio at 300ma load
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 12 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator operation description the fan5361 is a 600ma or 750ma, step-down, switching voltage regulator that delivers a fixed output from an input voltage supply of 2.3v to 5.5v. using a proprietary architecture with synchronous rectification, the fan5361 is capable of delivering a peak efficiency of 92%, while maintaining efficiency over 80% at load currents as low as 1ma. the regulator operates at a nominal frequency of 6mhz at full load, which reduces the value of the external components to 470nh for the inductor and 4.7f for the output capacitor. control scheme the fan5361 uses a proprieta ry, non-linear, fixed-frequency pwm modulator to deliver a fast load transient response, while maintaining a constant switching frequency over a wide range of operating conditions. the regulator performance is independent of the output capacitor esr, allowing for the use of ceramic output capacitors. although this type of operation normally results in a switching frequency that varies with input voltage and load current, an internal frequency loop holds the switching frequency constant over a large range of input voltages and load currents. for very light loads, the fan5361 operates in discontinuous current (dcm) single-pulse pfm mode, which produces low output ripple compared with other pfm architectures. transition between pwm and pfm is seamless, with a glitch of less than 18mv at v out during the transition between dcm and ccm modes. combined with exceptional transient response characteristics, the very low quiescent current of the controller (35a) maintains high efficiency; even at very light loads, while preserving fast transient response for applications requiring tight output regulation. enable and soft-start when en is low, all circuits in fan5361 are off and the ic draws ~50na of current. when en is high and v in is above its uvlo threshold, the regulator begins a soft-start cycle. the output ramp during soft-start is a fixed slew rate of 50mv/ s from 0 to 1 v out , then 12.5mv/ s until the output reaches its setpoint. regardless of the state of the mode pin, pfm mode is enabled to prevent current from being discharged from c out if soft-start begins when c out is charged. the ic may fail to start if heavy load is applied during startup and/or if excessive c out is used. this is due to the current- limit fault response, which protects the ic in the event of an over-current condition present during soft-start. the current required to charge c out during soft-start is commonly referred to as ?displacement current? is given as: dt dv c i out disp ? = (1) where the dt dv term refers to the soft-start slew rate above. to prevent shut-down during soft-start, the following condition must be met: ) dc ( max load disp i i i < + table 1. minimum r load values for soft-start with various c out values c out minimum r load 4.7 f, 0402 v out / 0.60 2 x 4.7 f, 0402 v out / 0.60 10 f, 0603 v out / 0.60 10 f, 0805 v out / 0.50 startup into large c out multiple soft-start cycles are required for no-load startup if c out is greater than 15 f. large c out requires light initial load to ensure the fan5361 starts appropriately. the ic shuts down for 85 s when i disp exceeds i limit for more than 21 s of current limit. the ic then begins a new soft-start cycle. since c out retains its charge when the ic is off, the ic reaches regulation after multiple soft-start attempts. mode pin logic 1 on this pin forces the ic to stay in pwm mode. a logic 0 allows the ic to automatically switch to pfm during light loads. if the mode pin is toggled, the converter synchronizes its switching frequency to four times the frequency on the mode pin (f mode ). the mode pin is internally buffered with a schmitt trigger, which allows the mode pin to be driven with slow rise and fall times. an asymmetric duty cycle for frequency synchronization is also permitted as long as the minimum time below v il(max) or above v ih(max) is 100ns. current limit, fault shutdown, and restart a heavy load or short circuit on the output causes the current in the inductor to increase until a maximum current threshold is reached in the high-side switch. upon reaching this point, the high-side switch turns off, preventing high currents from causing damage. the regulator continues to limit the current cycle-by-cycle. after 21s of current limit, the regulator triggers an over-current fault, causing the regulator to shut down for about 85 s before attempting a restart. if the fault was caused by short circuit, the soft-start circuit attempts to restart and produces an over-current fault after about 32 s, which results in a duty cycle of less than 30%, limiting power dissipation. the closed-loop peak-current limit, i lim(pk) , is not the same as the open-loop tested current limit, i lim(ol) , in the electrical characteristics table. this is primarily due to the effect of propagation delays of the ic current limit comparator.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 13 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator under-voltage lockout (uvlo) when en is high, the under-voltage lockout keeps the part from operating until the input supply voltage rises high enough to properly operate. this ensures no misbehavior of the regulator during startup or shutdown. thermal shutdown (tsd) when the die temperature increases, due to a high load condition and/or a high ambient temperature, the output switching is disabled until the temperature on the die has fallen sufficiently. the junction temperature at which the thermal shutdown activates is nominally 150c with a 15c hysteresis. minimum off-time effect on switching frequency t off(min) is 50ns. this imposes constraints on the maximum in out v v that the fan5361 can provide, or the maximum output voltage it can provide at low v in while maintaining a fixed switching frequency in pwm mode. when v in is low, fixed switching is maintained as long as 7 . 0 1 ) ( ? ? sw min off in out f t v v . the switching frequency drops when the regulator cannot provide sufficient duty cycle at 6mhz to maintain regulation. this occurs when v out is greater than or equal to 1.82v and v in is below 2.9v at high load currents (see figure 15) . the calculation for switching frequency is given by: ? ? ? ? ? ? ? ? = mhz t f max sw sw 6 , 1 min ) ( (3) where: ? ? ? ? ? ? ? ? ? ? ? ? + + ? = out on out in off out out max sw v r i v r i v ns t 1 50 ) ( (4) where: off r = l n dson dcr r + _ on r = l p dson dcr r + _
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 14 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator applications information selecting the inductor the output inductor must meet both the required inductance and the energy handling capability of the application. the inductor value affects average current limit, the pwm-to- pfm transition point, output voltage ripple, and efficiency. the ripple current ( ? i) of the regulator is: ? ? ? ? ? ? ? ? ? ? ? sw out in in out f l v v v v i (5) the maximum average load current, i max(load), is related to the peak current limit, i lim(pk) by the ripple current, given by: 2 i i i ) pk ( lim ) load ( max ? = (6) the transition between pfm and pwm operation is determined by the point at which the inductor valley current crosses zero. the regulator dc current when the inductor current crosses zero, i dcm , is: 2 i i dcm = (7) the fan5361 is optimized for operation with l = 470nh, but is stable with inductances up to 1.2 h (nominal). up to 2.2 h(nominal) may be used; however, in that case, v in must be greater than or equal to 2.7v. the inductor should be rated to maintain at least 80% of its value at i lim(pk) . efficiency is affected by the inductor dcr and inductance value. decreasing the inductor value for a given physical size typically decreases the dcr; but since ? i increases, the rms current increases, as do the core and skin effect losses. 12 i i i 2 2 ) dc ( out rms + = (8) the increased rms current produces higher losses through the r ds(on) of the ic mosfets, as well as the inductor dcr. increasing the inductor value produces lower rms currents, but degrades transient response. for a given physical inductor size, increased inductance usually results in an inductor with lower saturation current and higher dcr. table 2 shows the effects of inductance higher or lower than the recommended 470nh on regulator performance. output capacitor table 3 suggests 0402 capacitors. 0603 capacitors may further improve performance in that the effective capacitance is higher. this improves transie nt response and output ripple. increasing c out has no effect on loop stability and can therefore be increased to reduce output voltage ripple or to improve transient response. output voltage ripple, ? v out , is: ? ? ? ? ? ? ? ? + ? ? ? = esr f c i v sw out out 8 1 (9) input capacitor the 2.2 f ceramic input capacitor should be placed as close as possible between the vin pin and gnd to minimize the parasitic inductance. if a long wire is used to bring power to the ic, additional ?bulk? capacitance (electrolytic or tantalum) should be placed between c in and the power source lead to reduce ringing that can occur between the inductance of the power source leads and c in . the effective capacitance value decreases as v in increases due to dc bias effects. table 2. effects of changes in inductor value (from 470nh recommended value) on regulator performance inductor value i max(load) ? v out transient response increase increase decrease degraded decrease decrease increase improved table 3. recommended passive components and their variation due to dc bias component description vendor min. typ. max. (5) comment l1 470nh, 2012, 90m ,1.1a murata lqm21pnr47mc0 murata lqm21pnr54mg0 hitachi metals hsli-201210ag-r47 300nh 470nh 520nh minimum value occurs at maximum current c in 2.2 f, 6.3v, x5r, 0402 murata or equivalent grm155r60j225me15 grm188r60j225ke19d 1.0 f2.2 f2.4 f decrease primarily due to dc bias (v in ) and elevated temperature c out 4.7 f, x5r, 0402 murata or equivalent grm155r60g475m grm155r60e475me760 1.6 f4.7 f5.2 f decrease primarily due to dc bias (v out ) note: 5. higher inductance values are also acceptable. see ?selecting the inductor? instructions in applications information.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 15 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator pcb layout guidelines there are only three external components: the inductor and the input and output capacitors. for any buck switcher ic, including the fan5361, it is important to place a low-esr input capacitor very close to the ic, as shown in figure 41. the input capacitor ensures good input decoupling, which helps reduce noise appearing at the output terminals and ensures that the control sections of the ic do not behave erratically due to excessive noise. this reduces switching cycle jitter and ensures good overall performance. it is important to place the common gnd of c in and c out as close as possible to the fan5361 c2 terminal. there is some flexibility in moving the inductor further away from the ic; in that case, v out should be considered at the c out terminal. c out v in gnd a1 a2 b2 b1 c1 c2 c in 470nh v out figure 41. pcb layout guidance
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 16 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator physical dimensions seating plane 0.06 c 0.05 c c side views notes: a. no jedec registration applies. b. dimensions are in millimeters. c. dimensions and tolerances per asmey14.5m, 1994. d. datum c, the seating plane is defined by the spherical crowns of the balls. e. package typical height is 586 microns 39 microns (547-625 microns). f. for dimensions d, e, x, and y see product datasheet. g. drawing filename: uc006acrev4. bottom view top view recommended land pattern (nsmd pad type) e d b a ball a1 index area a1 0.03 c 2x 0.03 c 2x 0.2080.021 0.3780.018 1 2 a b c 0.40 0.40 0.005 cab (x) +/-0.018 (y) +/-0.018 ?0.2600.010 0.40 6x e d f f 0.40 (?0.20) cu pad (?0.30) solder mask opening f 0.625 0.547 figure 42. 6-bump wlcsp, 0.4mm pitch product-specific dimensions product d e x y fan5361ucx 1.370 +/-0.040 0.970 +/-0.040 0.285 0.285 package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner wit hout notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to verify or o btain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 17 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator physical dimensions side view notes: a. outline based on jedec registration mo-229, variation vccc. b. dimensions are in millimeters. c. dimensions and tolerances per asme y14.5m, 1994. d. drawing filename: mkt-umlp06crev1 bottom view top view recommended land pattern 2.40 1.40 1.10 13 64 13 64 0.30 0.65 0.50 b a 2x 2x 0.05 0.00 0.55 max 0.10 c 0.08 c (0.15) c seating plane 2.0 2.0 0.65 1.30 1.10 max 1.50 max 0.35 0.25 0.35 0.25 pin1 ident 0.10 c a b 0.05 c 6x 6x 1.50 1.60 pin1 ident 0.10 c 0.10 c figure 43. 6-lead, 2 x 2mm, ultra-thin molded leadless package (umlp) package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner wit hout notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to verify or o btain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fan5361 ? rev. 1.1.0 18 fan5361 ? 6mhz, 600ma / 750ma synchronous buck regulator

▲Up To Search▲

Price & Availability of FAN5361-10

	To Download FAN5361-10 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .