XC9503B093AR-G

XC9503 Series ETR0703 003 2ch.Step-Down DC/DC Controller ICs GreenOperation Compatible GENERAL DESCRIPTION XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC controller ICs. Since the series has a built-in 0.9V reference voltage (accuracy 2%), 0.9V to 6.0V can be set using external components. With a 300kHz frequency, the size of the external components can be reduced. Switching frequencies of 180kHz & 500kHz are also available as custom-designed products. The control of the XC9503 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is highly efficient from light loads through to large output currents. Noise is easily reduced with PWM control since the frequency is fixed. The series gives freedom to select control suited to the application. Soft-start time is internally set to 10msec and offers protection against in-rush currents when the power is switched on and also protects against voltage overshoot. FEATURES APPLICATIONS 2 ch DC/DC Controller (Step-Down & Down) PDAs Input Voltage Range : 2.0V ~ 10V Palmtop computers Power Supply Voltage Range : 2.0V ~ 10V Output Voltage Range : 0.9V ~ 6.0V (set by FB pins) Digital cameras Oscillation Frequency : 300kHz ( 15%) Various multi function power supplies (180kHz, 500kHz custom) Maximum Duty Cycle : 100% Control Method : PWM or PWM/PFM Selectable Output Current : More than 1000mA (VIN=5.0V, VOUT=3.3V) High Efficiency : 92% (TPY.) Stand-By Function : 3.0 A (MAX.) Soft-Start Time : 10 ms (internally set) Packages : MSOP-10, USP-10 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs. Output Current <XC9503B093A VOUT : 3.3V, VOUT : 1.8V > 1/32 XC9503 Series PIN CONFIGURATION USP-10 MSOP-10 (BOTTOM VIEW) (TOP VIEW) PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS 1 EXT 1 Channel 1: External Transistor Drive Pin <Connected to P-ch Power MOSFET Gate> 2 VDD Supply Voltage Channel 1: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage 3 FB1 can be set freely by connecting split resistors between VOUT1 and Ground.> Channel 1: PWM/PFM Switching Pin <Control Output 1. PWM control when connected to 4 PWM1 VDD, PWM / PFM auto switching when connected to Ground. > Channel 1: Enable Pin <Connected to Ground when Output 1 is in stand-by mode. 5 EN1 Connected to VDD when Output 1 is active. EXT1 is high when in stand-by mode.> Channel 2: Enable Pin <Connected to Ground when Output 2 is in stand-by mode. 6 EN2 Connected to VDD when Output 2 is active. EXT2/ is high when in stand-by mode.> Channel 2: PWM/PFM Switching Pin <Control Output 2. PWM control when connected to 7 PWM2 VDD, PWM / PFM auto switching when connected to Ground.> Channel 2: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage 8 FB2 can be set freely by connecting split resistors between VOUT2 and Ground.> 9 GND Ground 10 EXT2 Channel 2: External Transistor Drive Pin <Connected to P-ch Power MOSFET Gate> PRODUCT CLASSIFICATION Ordering Information XC9503 DESIGNATOR ITEM SYMBOL DESCRIPTION Type of DC/DC Controller B Standard type (10 Pin) Output Voltage 09 FB products =0, =9 fixed 2 180kHz (custom) Oscillation Frequency 3 300kHz 5 500kHz (custom) AR MSOP-10 (1,000/Reel) AR-G MSOP-10 (1,000/Reel) (*1) - Packages (Order Unit) DR USP-10 (3,000/Reel) DR-G USP-10 (3,000/Reel) (*1) The -G suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant. 2/32