5 4 VIN EXT CE GND FB 1 2 3 XC9220/XC9221 Series ETR0511-012 16V Input Voltage, Step-Down DC/DC Controller ICs. GENERAL DESCRIPTION The XC9220/XC9221 series is a group of multi-purpose step-down DC/DC controller ICs. The ICs enable a high efficiency, stable power supply with an output current up to 3A to be configured using only a transistor, a coil, a diode, and two capacitors connected externally. Low ESR capacitors such as a ceramic capacitor can be used as an output capacitor. The XC9220/XC9221 series has a 0.9V (1.5%) reference voltage, and using externally connected resistors, the output voltage can be set freely. With an internal switching frequency of 300kHz and 500kHz 1.0MHz, small external components can also be used. The XC9220 series is PWM control, and the XC9221 series is PWM/PFM mode, which automatically switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions. As for the soft-start time, the XC9220/XC9221A and C series is internally set to 4msec and the XC9220/XC9221B and D series can be externally set-up. With the built-in UVLO (Under Voltage Lock Out) function, the external P-channel driver transistor is forced OFF when input voltage becomes 2.3V or lower. APPLICATIONS FEATURES Operating Voltage Range : 2.8V ~ 16.0V Set top boxes Output Voltage Externally Set Range : 1.2V or more (V =0.9V+1.5%) FB Digital TVs Output Current : Less than 3.0A DVD / HDD recorders Oscillation Frequency : 300kHz, 500kHz, and 1.0MHz Smart phones / Mobile phones Control Methods : PWM control (XC9220) PWM/PFM automatic switching Note PCs / Tablet PCs (XC9221) Soft-Start Function : 4ms, internally set (XC9220/XC9221A, 500kHz) Externally set (XC9220/XC9221B) : Integral protection (1.0 ms) Protection Circuits (XC9220/XC9221 Aand B series) Short-circuit protection Low ESR Capacitor Compatible : Ceramic capacitor Operating Ambient Temperature : - 40 ~ + 85 Packages : SOT-25 USP-6C Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS VIN Efficiency vs. Output Current XC9221A095MR (VOUT=3.3V, FOSC=500kHz) CIN CIN=47 F (OS-Con), CL=47 F (OS-Con), CE L=10 H (CDRH8D43, SUMIDA) Pch PchMOSFET: CPH3308 (SANYO), CDD=1.0 F (ceramic), RIN=10 MOSFET 100 RSENSE 90 VIN=5.0V L ( for ceramic CL ) VOUT 80 70 CFB RFB1 SBD VIN=16.0V 60 CL VIN=12.0V 50 RFB2 40 30 20 10 * RSENSE : Tantalum and electrolytic capacitors can be used, in w hich case, RSENSE becomes unnecessary. 0 0.1 1 10 100 1000 10000 Output Current IOUT (mA) 1/22 Efficiency EFFI (%) XC9220/XC9221 Series PIN CONFIGURATION VIN EXT/ 5 4 * The dissipation pad for the USP-6C package (preliminary) should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the VSS (No.5) pin. 1 2 3 CE/CSS VSS FB SOT-25 USP-6C (TOP VIEW) (BOTTOM VIEW) PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTION SOT-25 USP-6C 1 6 CE/CSS Chip Enable / Soft-Start 2 5 VSS Ground 3 4 FB Output Voltage Sense 4 3 EXT/ External Transistor Drive - 2 NC No Connection 5 1 VIN Power Supply PRODUCT CLASSIFICATION Ordering Information *1 XC9220 : PWM control *1 XC9221 : PWM/PFM automatic switching control DESIGNATOR ITEM SYMBOL DESCRIPTION A Soft-start internally set with integral protection function Type of DC/DC Controller B Soft-start externally set with integral protection function ICs C Soft-start internally set without integral protection function D Soft-start externally set without integral protection function Output Voltage 09 FB Voltage (Fixed) 3 300kHz Oscillation Frequency 5 500kHz A 1.0MHz MR SOT-25 (3,000/Reel) MR-G SOT-25 (3,000/Reel) (*1) Packages (Order Unit) - ER USP-6C (3,000/Reel) ER-G USP-6C (3,000/Reel) (*1) The -G suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. 2/22