FAN53528 3.0 A, 2.4 MHz, Digitally Programmable Buck Regulator Descriptions www.onsemi.com The FAN53528 is a stepdown switching voltage regulator that delivers a digitally programmable output from an input voltage supply 2 of 2.5 V to 5.5 V. The output voltage is programmed through an I C interface capable of operating up to 3.4 MHz. Using a proprietary architecture with synchronous rectification, the FAN53528 is capable of delivering 3.0 A continuous at over 80% WLCSP15 efficiency, maintaining that efficiency at load currents as low as CASE 567QS 10 mA. The regulator operates at a nominal fixed frequency of 2.4 MHz, which reduces the value of the external components. MARKING DIAGRAM Additional output capacitance can be added to improve regulation during load transients without affecting stability. 1 2K K At moderate and lightloads, Pulse Frequency Modulation (PFM) is Pin1 Mark used to operate in Power Save Mode with a typical quiescent current XY Z of 50 mA at room temperature. Even with such a low quiescent current, the part exhibits excellent transient response during large load 1, 2 = Two Alphanumeric Characters swings. At higher loads, the system automatically switches to for Device Mark fixedfrequency control, operating at 2.4 MHz. In Shutdown Mode, KK = Two Alphanumeric Characters the supply current drops below 1 mA, reducing power consumption. for Lot Rune Code Mark . = Pin 1 Indicator PFM Mode can be disabled if fixed frequency is desired. The X = Alphabetical Year Code FAN53528 is available in a 15bump, 1.310 mm 2.015 mm, 0.4 mm Y= 2weeks Date Code ball pitch WLCSP. Z = Assembly Plant Code Features ORDERING INFORMATION FixedFrequency Operation: 2.4 MHz See detailed ordering and shipping information on page 2 of BestinClass Load Transient this data sheet. Continuous Output Current Capability: 3.0 A 2.5 V to 5.5 V Input Voltage Range Digitally Programmable Output Voltage: 0.35 V to 1.14375 V in 6.25 mV Steps Programmable Slew Rate for Voltage Transitions 2 I CCompatible Interface Up to 3.4 Mbps PFM Mode for High Efficiency in Light-Load Quiescent Current in PFM Mode: 50 A (Typical) Input UnderVoltage Lockout (UVLO) Thermal Shutdown and Overload Protection 15Bump WaferLevel Chip Scale Package (WLCSP) Applications Application, Graphic, and DSP Processors ARM , Tegra , OMAP , NovaThor , ARMADA , Krait , etc. Hard Disk Drives, LPDDR3, LPDDR4 Tablets, Netbooks, UltraMobile PCs Smart Phones Gaming Devices Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: February, 2019 Rev. 2 FAN53528/DFAN53528 VIN C BY C IN EN VOUT SDA L1 SW FAN 53528 SCL C OUT1,2 VSEL LOAD PGND AGND Figure 1. Typical Application PACKAGE MARKING AND ORDERING INFORMATION PowerUp Defaults Temperature Packing Device Part Number VSEL0 VSEL1 EN Delay Range Package Method Marking FAN53528BUC08X 0.4 0.6 No 40 to 85 C WLCSP Tape & Reel FX FAN53528DUC40X 0.6 0.9 No FY FAN53528GUC48X 0.65 0.7 No FZ FAN53528EUC48X 0.65 0.7 5 ms FW *FAN53528DUC1204X 1.1 0.9 No TBD For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *This device is not released yet. RECOMMENDED EXTERNAL COMPONENTS Table 1. RECOMMENDED EXTERNAL COMPONENTS FOR 3.0 A MAXIMUM LOAD CURRENT Component Description Vendor Parameter Typ. Unit L1 330 nH, 2016 Case Size See Table 2 L1 Alternative (Note 1) 470 nH 2016 Case Size C C 22 F, 6.3 V, X5R, 0603 C1608X5R0J226M080AC (TDK) C 22 F OUT1, OUT2 C 1 Piece 4.7 F, 10 V, X5R, 0603 C1608X5R1A475K (TDK) C 4.7 IN C (Note 1) 1 Piece 100 nF, 6.3V, X5R, 0201 GRM033R60J104KE19D (Murata) C 100 nF BY 1. L1 Alternative can be used if not following reference design. C is recommended to reduce any high frequency component on VIN bus. BY C is optional and used to filter any high frequency component on VIN bus. BY Table 2. RECOMMENDED INDUCTORS Component Dimensions DCR I SAT (m Typ.) (Note 2) Manufacturer Part L (nH) L W H Toko DFE201610ER33N 330 21 6.1 2.0 1.6 1.0 Toko DFE201610ER47N 470 26 5.3 2.0 1.6 1.0 2. I where the dc current drops the inductance by 30%. SAT www.onsemi.com 2