MAX8952 2.5A Step-Down Regulator with Remote Sense in 2mm x 2mm WLP General Description Features 2.5A Guaranteed Output Current The MAX8952 high-efficiency DC-to-DC step-down 2 switching regulator delivers up to 2.5A of output current. I C Programmable V (770mV to 1.40V in 10mV OUT Steps) The device operates from a 2.5V to 5.5V input voltage range, supporting commonly-used battery technologies Initial Accuracy 0.5% at 1.40V Output 2 in handsets. The output voltage is I C programmable 1.5% Output Accuracy Over Load, Line, and from 0.77V to 1.40V. Remote sense ensures precise DC Temperature (DCR 38.5m) regulation at the load. Total output error is less than Power-Save Mode Increases Light Load Efficiency 1.5% over load, line, and temperature. Fixed 3.25MHz PWM Switching Frequency The IC operates at a 3.25MHz fixed frequency. The high Small 1.0H Inductor operating frequency minimizes the size of external com- Synchronizes to 13MHz, 19.2MHz, or 26MHz ponents. The switching frequency of the converter can be System Clock When Available synchronized to the master clock of the application. When Overvoltage and Overcurrent Protection synchronizing to an external clock, the IC measures the frequency of the external clock to ensure that the clock is Operates from 2.5V to 5.5V Input Supply stable before changing the switching frequency to the Thermal Shutdown Protection external clock frequency. On-Chip FET and Synchronous Rectifier An on-board DAC allows adjustment of the output volt- 2 400kHz I C Interface age in 10mV steps. The output voltage can be pro- < 1A Shutdown Current 2 grammed directly through the I C interface, or by 16-Bump, 2mm x 2mm WLP Package preloading a set of on-board registers and using the two VID logic signals to select the appropriate register. Ordering Information Other features include internal soft-start control circuitry to reduce inrush current, output overvoltage, overcur- PART TEMP RANGE PIN-PACKAGE rent, and overtemperature protection. 16-Bump WLP MAX8952EWE+T -40C to +85C Applications (0.5mm pitch) +Denotes a lead(Pb)-free/RoHS-compliant package. Cell Phones and Smartphones T = Tape and reel. PDAs and MP3 Players Visit www.maximintegrated.com/products/patents for Tablet PCs product patent marking information. Typical Operating Circuit Bump Configuration TOP VIEW (BUMPS ON BOTTOM) 2.5V TO 1.8V TO 5.5V IN1 AGND VID1 IN2 3.6V + MAX8952 IN2 A1 A2 A3 A4 V DD 0.1F 10F 10F 0.1F 1H SNS+ EN LX LX 2.5V TO LX V OUT SCL 5.5V (0.77V TO 10F 0.1F 1.40V) SDA B1 B2 B3 B4 11 PGND IN1 PGND PGND SNS- VID0 2.2F 0.1F SYNC C1 C2 C3 SNS+ C4 EN VID0 SYNC V SDA SCL DD CPU VID1 SNS- D1 D2 D3 D4 AGND WLP 0.5mm PITCH For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-5318 Rev 1 6/11MAX8952 2.5A Step-Down Regulator with Remote Sense in 2mm x 2mm WLP ABSOLUTE MAXIMUM RATINGS IN1, IN2 to AGND..................................................-0.3V to +6.0V Operating Temperature Range ...........................-40C to +85C V to AGND.........................................................-0.3V to +4.0V Junction Temperature......................................................+150C DD LX, SNS+, VID0, VID1, EN to AGND..........-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C IN1 SCL, SDA, SYNC to AGND.........................-0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C DD PGND, SNS- to AGND...........................................-0.3V to +0.3V RMS LX Current ..............................................................2500mA Continuous Power Dissipation (T = +70C) A 16-Bump WLP 0.5mm Pitch (derate 20.4mW/C above +70C).........................1632mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions 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. PACKAGE THERMAL CHARACTERISTICS (Note 1) WLP Junction-to-Ambient Thermal Resistance ( ) ...........49C/W JA Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7 using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (V = V = 3.6V, V = V = 0V, V = 1.8V, T = -40C to +85C, unless otherwise noted. Typical values are at IN1 IN2 AGND PGND DD A T = +25C.) (Note 2) A PARAMETER CONDITIONS MIN TYP MAX UNITS IN1, IN2 Operating Range 2.5 5.5 V V Operating Range 1.8 3.6 V DD V Undervoltage Lockout DD V falling 0.54 0.865 1.35 V DD (UVLO) Threshold V UVLO Hysteresis 50 mV DD IN Undervoltage Lockout V falling 2.10 2.15 2.20 V IN (UVLO) Threshold IN UVLO Hysteresis 70 mV T = +25C 0.01 1 V = V = 5.5V, A IN1 IN2 V Shutdown Supply Current A DD EN = V = AGND DD T = +85C 0.01 A T = +25C 0.25 1 IN1, IN2 Shutdown Supply V = V = 5.5V, A IN1 IN2 A Current EN = V = AGND DD T = +85C 0.25 A T = +25C 0.35 1 A V = V = 5.5V, SCL = SDA = IN1 IN2 IN1, IN2 Standby Supply Current A 2 V , EN = AGND, I C ready DD T = +85C 0.35 A V = V = V = 3.6V, IN1 IN2 DD T = +25C 0.02 1 A V Standby Supply Current A DD SCL = SDA = V , EN = AGND, DD 2 T = +85C 0.02 I C ready A LOGIC INTERFACE EN, VID0, VID1 1.4 V = V = 2.5V to 5.5V, IN1 IN2 Logic Input High Voltage (V ) V IH V = 1.8V to 3.6V DD SYNC, SCL, SDA 0.7 x V D D EN, VID0, VID1 0.4 V = V = 2.5V to 5.5V, IN1 IN2 Logic Input Low Voltage (V ) V IL V = 1.8V to 3.6V DD SYNC, SCL, SDA 0.3 x V D D T = +25C -1 0.01 +1 A SDA, SCL, SYNC Logic Input V = 0V or V = 3.6V, IL IH A Current EN = AGND T = +85C 0.01 A 2 Maxim Integrated