XC9281/XC9282 Series ETR05063-006 HiSAT-COT Control Extremely Small 600mA Step-Down DC/DC Converters Green Operation Compatible GENERAL DESCRIPTION (*) The XC9281/XC9282 series are 600mA synchronous rectification DC/DC converters adopting HiSAT-COT control. Due to increasing the oscillation frequency to high frequency, coil with a size of 1.0 x 0.5 mm can be used. A 0.6 x 0.3 mm ceramic capacitor can be used for the input capacitance (C ) and the output capacitance (C ), realizing that the mounting area including IN L 2 peripheral components can be reduced to 3.52 mm . Due to increasing the oscillation frequency to a high frequency, the mounting area is reduced. Additionally, an efficiency equal to or higher than that of conventional products can realize by improving on-resistance and current consumption. Because of these features, XC9281/XC9282 series are ideal for equipment requiring miniaturization and low profile mounting area, and battery-powered equipment such as mobile equipment. Moreover, the high-speed transient response technology of the HiSAT-COT control makes it possible to minimize the fluctuation of the output voltage for a load transient condition. This feature is optimal for applications requiring a fast response and output voltage stability for an instantaneous load fluctuation like FPGA. (*) HiSAT-COT is a proprietary high-speed transient response technology for DC/DC converter which was developed by Torex. It is Ideal for the LSI s that require high precision and high stability power supply voltage. FEATURES APPLICATIONS (*) HiSAT-COT: TOREX Input Voltage Range : 2.5V ~ 5.5V Smart phones / Mobile phones Output Voltage Range : 0.7V ~ 1.15V (2.0%) Wireless earphone / Headset 1.2V ~ 3.6V (1.5%) Wearable devices Output Current : 600mA DSC / Camcorder Quiescent Current : 11A (XC9282 PWM/PFM Auto) Portable game consoles Oscillation Frequency : 4MHz, 6MHz Smartcard Efficiency (fOSC=4MHz) : 90.0% (VIN=3.7V,VOUT=1.8V,IOUT=200mA) Power supply for module Control Methods : HiSAT-COT Control PWM Control (XC9281) Various small power sources PWM/PFM Auto (XC9282) Protection Functions : Current Limit PCB IMAGE Functions : Soft-Start, UVLO C Discharge (Type B) L Input / Output Capacitor : Ceramic Capacitor Operating Ambient Temperature : - 40 ~ 105 Package : LGA-6B01 (1.2 x 1.2 x 0.3mm) WLP-5-06 (0.88 x 0.96 x 0.33mm) Environmentally : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE CHARACTERISTICS XC9281B18D / XC9282B18D (VOUT=1.8V) TYPICAL APPLICATION CIRCUIT L = 1.0H (DFE18SAN1R0MG0L) C = 4.7F (GRM035R60J475ME15) C = 4.7F (GRM035R60J475ME15) IN L L : 1.0uH VIN VOUT XC9281/XC9282 (1.0x0.5x0.55mm) 2.5 ~ 5.5V 1.8V / 600mA VIN LX CE CE VOUT CIN : 4.7uF CL : 4.7uF (0.6x0.3x0.5mm) (0.6x0.3x0.5mm) GND 1/31 XC9281/XC9282 Series BLOCK DIAGRAM 1) XC9281/XC9282 Series Type A Phase C Current Limit V FB IN Compensation R1 Error Amp. V Comparator OUT + Synch. - - S Q Buffer Lx Logic + Driver R2 R Vref with GND Soft Start On Time V IN Generator V OUT CE Control Logic, CE PWM/PFM UVLO Selector (*) PWM/PFM Selecto in the XC9281 series is fixed to PWM control. PWM/PFM Selecto In the XC9282 series is fixed to PWM/PFM automatic switching control. Diodes inside the circuit are an ESD protection diode and a parasitic diode. 2) XC9281/XC9282 Series Type B Phase C Current Limit V FB IN Compensation R1 Error Amp. V Comparator OUT + Synch. - - S Q Buffer Lx Logic + Driver R2 R Vref with GND Soft Start On Time V IN Generator V OUT CE Control Logic, CE UVLO PWM/PFM C Auto-Discharge L Selector (*) PWM/PFM Selecto in the XC9281 series is fixed to PWM control. PWM/PFM Selecto In the XC9282 series is fixed to PWM/PFM automatic switching control. Diodes inside the circuit are an ESD protection diode and a parasitic diode. 2/31