XC9260/XC9261Series ETR05042-004a HiSAT-COT Control, 1.5A Synchronous Step-Down DC/DC Converters GreenOperation-compatible GENERAL DESCRIPTION The XC9260/XC9261 series is a group of synchronous-rectification type DC/DC converters with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Output voltage is internally set in a range from 0.8V to 3.6V (accuracy: 2.0%) increments of 0.05V. The device provides a high efficiency, stable power supply with an output current of 1.5A to be configured using only a coil and two capacitors connected externally. Oscillation frequency is set to 1.2MHz or 3.0MHz can be selected for suiting to your particular application. (*) As for operation mode HiSAT-COT control excellent in transient response, the XC9260 series is PWM control, the XC9261 series is automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0A or less. As for the soft-start function as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes 2.00V or lower. The B types integrate CL High Speed discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge. Two types of package SOT-89-5, USP-6C are available. (*) HiSAT-COT is DC/DC converter with proprietary high-speed transient response technology developed uniquely by Torex, ideal for LSI that require high precision and high stability power supply voltage. FEATURES APPLICATIONS Input Voltage Range : 2.7V5.5V Communication equipment / Communication Module Output Voltage Range : 0.8V3.6V (2.0%) (Bluetooth/Wi-Fi/GPS Quiescent Current : 25A (fOSC=3.0MHz) Output Current : 1.5A MCU/FPGA/ASIC for power supplies (POL) Oscillation Frequency : 1.2MHz, 3.0MHz Smart phones / Mobile phones 90% Efficiency : (V =3.7V, V =1.8V, I =200mA) IN OUT OUT DSC/Camcorder Control Methods : HiSAT-COT Control : 100% Duty Cycle : PWM Control (XC9260) : PWM/PFM Auto (XC9261) Protection Circuits : Thermal Shutdown : Current Limit (Pendent character) : Short Circuit Protection (Type B) Functions : Soft-Start : UVLO : CL High Speed Discharge (Type B) Capacitor : Ceramic Capacitor Operating Ambient Temperature : - 40 + 105 Packages : SOT-89-5, USP-6C Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XC9260A18D / XC9261A18D L = LQM2MPN1R0MGH(1.0H) C =10F(GRM155R61A106M) C =10F(GRM155R61A106M) IN L 100 VOUT L 1.5A V IN 90 VIN Lx 80 CE 70 CE V OUT XC9261 VIN = 5.0V 60 VIN = 3.7V XC9260 50 PGND AGND 40 CIN CL 30 VIN = 5.0V 20 VIN = 3.7V 10 0 0.1 1 10 100 1000 10000 Output Current: I (mA) OUT 1/25 Efficiency: EFFI (%) XC9260/XC9261Series BLOCK DIAGRAM 1) XC9260/XC9261 Series Type A (SOT-89-5) 2) XC9260/XC9261 Series Type B (SOT-89-5) Phase High Side Phase Short High Side CFB VIN CFB VIN Compensation Current Limit Compensation Protection Current Limit R1 R1 Error Amp. Error Amp. VOUT Comparator VOUT Comparator + + Synch. Synch. - - - S Q Buffer Lx - S Q Buffer Lx Logic Logic + + Driver Driver R2 R R2 R Vref with Vref with V V SS SS Soft Start Soft Start Minimum Minimum On Time On Time VIN VIN Generator Generator VOUT VOUT CE Control Logic, CE Control Logic, CE UVLO, CE UVLO, PWM/PFM PWM/PFM Thermal Shutdown Thermal Shutdown Selector Selector (*) The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at PWM internally. The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at PWM/PFM automatic switching internally. Diodes inside the circuit are an ESD protection diode and a parasitic diode. 3) XC9260/XC9261 Series Type A (USP-6C) 4) XC9260/XC9261 Series Type B (USP-6C) Phase High Side Phase Short High Side C V C FB IN FB VIN Compensation Current Limit Compensation Protection Current Limit R1 R1 Error Amp. Error Amp. V Comparator OUT VOUT Comparator + + Synch. Synch. - - - S Q Logic Buffer Lx - S Q Logic Buffer Lx + + Driver Driver R2 R R2 R Vref with Vref with AGND AGND Soft Start Soft Start Minimum Minimum PGND PGND On Time V On Time V IN IN Generator V Generator V OUT OUT CE Control Logic, CE Control Logic, CE UVLO, CE UVLO, PWM/PFM PWM/PFM Thermal Shutdown Selector Thermal Shutdown Selector (*) The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at PWM internally. The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at PWM/PFM automatic switching internally. Diodes inside the circuit are an ESD protection diode and a parasitic diode. 2/25