XC9276 Series ETR05070-005a Ultra-Low Quiescent Current, Synchronous Step-Down PFM DC/DC Converter with Output voltage selectable function Green Operation compatible GENERAL DESCRIPTION The XC9276 Series is a 150mA step-down synchronous rectification DC/DC converter which has an output voltage switch- over function with an ultra-low power consumption circuit and a PFM control. The efficiency performance at a light load current is dramatically improved by implementing ultra-low power consumption circuits which has 200nA consumption current, and PFM control method. Additionally two-preset output voltage switchover function is available with using VSET pin. This function can select an appropriate output voltage based on the MCU behavior mode and contribute a power consumption reduction for a total system. Due to these functions, XC9276 series are suitable for equipment which needs a high efficiency performance at a light load current, and a long-time battery life. XC9276 series are compatible to 2.2uH inductor therefore it can reduce an output ripple voltage which is a negative side of PFM control method, and a PCB board area size. FEATURES APPLICATIONS Input Voltage Range : 1.8V ~ 6.0V Smart meter Output Voltage Setting : 0.5V ~ 1.9V (0.05V increments) Low Power RF 2.0V ~ 3.6V (0.1V increments) Sensor Module Output Voltage Accuracy 20mV (V 1.0V) OUT1,2 2.0% (V 1.0V) OUT1,2 Wearable Devices Output Current : 150mA Energy Harvest devices Supply Current : 200nA VOUT=1.8V (TYP.) Back-up power supply circuit Control Method : PFM control Smart card Function : Output Voltage selectable function CL Discharge (D Type) Devices with 1 Lithium cell UVLO function Protection Functions : Short Protection Input / Output Capacitor : Ceramic Capacitor Compatible Operation Ambient Temperature : -40 ~ 85 Package : WLP-6-03 (1.72 x 1.07x 0.33mm) SOT-26W (2.9 x 2.8 x 1.3mm) USP-8B06 (2.0 x 2.0 x 0.33mm) Environmentally Friendly EU RoHS compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS V = 1.8V OUT L=GLUHK2R201A(2.2H), C ,C =GRM188R61A106ME69(10F) IN L 100 XC9276B1410R-G 90 V IN L : 2.2 H 80 1.8 ~ 6.0V V LX IN VOUT 70 0.7V/150mA (VSET=L) 1.8V/150mA (VSET=H) CE 60 CIN CL VOUT (Ceramic) (Ceramic) 50 VSET GND 40 0.300 VIN = 2.7V 30 0.500 VIN = 3.6V 0.700 20 1.000 10 VIN = 4.2V 3.000 0 4.998 0.001 0.01 0.1 1 10 100 6.998 IOUT(mA) 9.999 1/30 EFFI (%) XC9276 Series BLOCK DIAGRAM V OUT Control Signal M1 Short Current VOUT protection Sense PV VSET Controller IN Logic PFM Comparator FB - + PFM Controller Synch Buffer Lx CE CE Controller Logic V Driver REF PGND UVLO AV IN Start-up Controller AGND * Diodes inside the circuits are ESD protection diodes and parasitic diodes. XC9276B does not have C Discharge function. L For WLP-6-03 and SOT-26W, AVIN and PVIN are connected internally and the pin name is VIN. Additionally AGND and PGND are also connected internally and the pin name is GND. 2/30