july 2014 ? 2012 fairchild semiconductor corporation www.fairchildsemi.com fan53525 ? rev. 1.0.1 fan53525 ? 3.0 a, 2.4 mhz, digitally programmable tinybuck ? regulator fan53525 3.0a, 2.4mhz, digitally programmable tinybuck? regulator features ? fixed-frequency operation: 2.4 mhz ? best-in-class load transient ? continuous output current capability: 3.0 a ? 2.5 v to 5.5 v input voltage range ? digitally programmable output voltage: - 0.600 v to 1.39375 v in 6.25 mv steps ? programmable slew rate for voltage transitions ? i 2 c-compatible interface up to 3.4 mbps ? pfm mode for high efficiency in light load ? quiescent current in pfm mode: 50 a (typical) ? input under-voltage lockout (uvlo) ? thermal shutdown and overload protection ? 15-bump wafer-level chip scale package (wlcsp) applications ? application, graphic, and dsp processors - arm?, tegra?, omap?, novathor?, armada?, krait?, etc. ? hard disk drives, lpddr3 ? tablets, netbooks, ultra-mobile pcs ? smart phones ? gaming devices all trademarks are the property of their respective owners. description the fan53525 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5 v to 5.5 v. the output voltage is programmed through an i 2 c interface capable of operating up to 3.4 mhz. using a proprietary architecture with synchronous rectification, the fan53525 is capable of delivering 3.0 a continuous at over 80% efficiency, maintaining that efficiency at load currents as low as 10 ma. the regulator operates at a nominal fixed frequency of 2.4 mhz, which reduces the value of the external components to 330 nh for the output inductor and as low as 20 f for the output capacitor. additional output capacitance can be added to improve regulation during load transients without affecting stability, allowing inductance up to 1.2 h to be used. at moderate and light loads, pulse frequency modulation (pfm) is used to operate in power-save mode with a typical quiescent current of 50 a at room temperature. even with such a low quiescent current, the part exhibits excellent transient response during large load swings. at higher loads, the system automatically switc hes to fixed-frequency control, operating at 2.4 mhz. in shutdown mode, the supply current drops below 1 a, reducing power consumption. pfm mode can be disabled if fixed frequency is desired. the fan53525 is available in a 15-bump, 1.310 mm x 2.015 mm, 0.4 mm ball pitch wlcsp. figure 1. typical application
? 2012 fairchild semiconductor corporation www.fairchildsemi.com fan53525 ? rev. 1.0.1 2 fan53525 ? 3.0 a, 2.4 mhz, di gitally programmable tinybuck ? regulator ordering information part number power-up defaults dvs range / step size max. rms current temperature range package packing method vsel0 vsel1 FAN53525UC96X 1.20 1.225 0.600 v to 1.39375 v / 6.25 mv 3.0 a -40 to 85c wlcsp tape & reel fan53525uc48x 0.9 1.225 0.600 v to 1.39375 v / 6.25 mv 3.0 a -40 to 85c wlcsp tape & reel recommended external components table 1. recommended external components for 3.0 a maximum load current component description vendor parameter typ. unit l1 470 or 330 nh, 2016 case size see table 2 c out 22 ? f, 6.3 v, x5r, 0603 c1608x5r0j226m (tdk) c 22 f c in 1 piece; 4.7 ? f, 10 v, x5r, 0603 c1608x5r1a475k(tdk) c 4.7 table 2. recommended inductors component dimensions manufacturer part# l (nh) dcr (m ? typ.) i maxdc (1) l w h toko dfr201612 c-r33n 330 23 4.2 2.0 1.6 1.2 toko dfe201612 c-r47n 470 40 3.2 2.0 1.6 1.2 cyntek pife20161b-r47ms-39 470 30 3.1 2.0 1.6 1.2 semco cigt201610umr47mne 470 30 4.0 2.0 1.6 0.9 semco cigt201210umr47mne 470 33 3.0 2.0 1.2 0.9 note: 1. i maxdc is the lesser current to produce 40c te mperature rise or 30% inductance roll-off.
? 2012 fairchild semiconductor corporation www.fairchildsemi.com fan53525 ? rev. 1.0.1 21 fan53525 ? 3.0 a, 2.4 mhz, di gitally programmable tinybuck ? regulator physical dimensions figure 39. 15-ball, wafer-level ch ip-scale package (wlcsp), 3x5 arra y, 0.4 mm pitch, 250 m ball product-specific dimensions d e x y 2.015 0.03 mm 1.310 0. 03 mm 0.255 mm 0.2075 mm package drawings are provided as a service to customers considering fairchild component s. drawings may change in any manner wit hout notice. please note the revision and/or date on the drawing and contact a fairchild semi conductor representative to verify or o btain the most recent revision. package specific ations do not expand the terms of fairchild?s worldwide terms and conditi ons, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packa ging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/uc/uc015ab.pdf . b a ball a1 index area c 0.005 cab side views top view notes a. no jedec registration applies. b. dimensions are in millimeters. c. dimensions and tolerance per asme y14.5 - 2009. d. datum c is defined by the spherical crowns of the balls. e. package nominal height is 586 39 microns (547-625 microns). f. for dimensions d,e,x, and y see product datasheet. g. drawing filname: mkt-uc015ab rev1 0.03 c 0.03 c 15x bottom view 0.05 c 0.06 c recommended land pattern (nsmd type) d 2x 2x e d (?0.200) cu pad (?0.300) solder mask opening a1 seating plane ?0.2600.02 (y)0.018 (x)0.018 0.625 0.547 0.3780.018 0.2080.021 0.40 0.40 0.40 0.40 f f 123 a b c d e 0.80 1.60 0.80 1.60
? 2012 fairchild semiconductor corporation www.fairchildsemi.com fan53525 ? rev. 1.0.1 22 fan53525 ? 3.0 a, 2.4 mhz, di gitally programmable tinybuck ? regulator
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