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XC9223B082DR データシート(PDF) 1 Page - Torex Semiconductor |
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XC9223B082DR データシート(HTML) 1 Page - Torex Semiconductor |
1 / 7 page Data Sheet 1 DC000019 XC9223/9224 Series 1A Driver Transistor Built-In Step-Down DC/DC Converters Preliminary October 7, 2004 V2 Green Operation Compatible APPLICATIONS Step-Down DC/DC Converters HDD Built-in P-channel MOSFET : 0.23 Ω Notebook computers Built-in Synchronous N-channel MOSFET : 0.25 Ω CD-R / RW, DVD (No Schottky Barrier Diode Required) PDAs, Portable communication modems High Efficiency : 94% (VIN=5.0V, VOUT=3.3V) Digital cameras, Video recorders Oscillation Frequency: : 1.0MHz, 2.0MHz (Small Inductor for High Frequency Selectable) Various general-purpose power supplies Synchronized with an External Clock Signal Ceramic Capacitor Compatible MSOP-10 / USP-10 Packages GENERAL DESCRIPTION FEATURES Input Voltage Range : 2.2V ~ 6.0V Output Voltage Range : 0.8V ~ VIN Can be set freely with 0.8V (+2%) of reference voltage by the external resistors. Oscillation Frequency : 1MHz, 2MHz ( ± 15% accuracy) Output Current : 1.0A Maximum Current Limit : 0.5A (MIN.) when LIM pin=’L’ : 1.5A (MIN.) when LIM pin=’H’ Controls : PWM/PFM externally switching : Synchronized with an external clock signal Protection Circuits : Thermal shutdown : Integral latch method (over current limit) Soft-Start Time : Short-circuit protection : 3mS (TYP.) internally set Voltage Detector : 0.712V detect, N-ch open drain output The XC9223/9224 series are synchronous step-down DC/DC converters with a 0.23 Ω (TYP.) P-channel driver transistor and a synchronous 0.25 Ω (TYP.) N-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistor. With a high switching frequency of 1.0MHz or 2.0MHz, a small inductor is selectable; therefore, the XC9223/9224 series are ideally suited to applications with height limitation such as HDD or space-saving applications. Current limit value can be chosen either 1.5A (MIN.) when the LIM pin is high level, or 0.5A (MIN.) when the LIM pin is low level for using the power supply which current limit value differs such as USB or AC adapter. With the MODE/SYNC pin, the XC9223/9224 series provide mode selection of the fixed PWM control or automatically switching current limit PFM/PWM control. As for preventing unwanted switching noise, the XC9223/9224 series can be synchronized with an external clock signal within the range of ± 25% toward an internal clock signal via the MODE/SYNC pin. For protection against heat damage of the ICs, the XC9223/9224 series build in three protection functions: integral latch protection, thermal shutdown, and short-circuit protection. With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.8V or lower. The series’ detector function monitors the discretional voltage by external resistors. TYPICAL APPLICATION CIRCUIT TYPICAL PERFOMANCE CHARACTERICSTICS Efficiency vs. Output Current VIN=5.0V, FOSC=2.0MHz L=2.0 µH(CDRH4D28C), CIN=10µF(ceramic), CL=10µF(ceramic) 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 10000 VOUT=3.3V VOUT=1.5V Output Current: IOUT (mA) VIN PGND AGND LX FB MODE/ SYNC CE VDIN VDOUT LIM L RFB1 RFB2 CL 1 3 5 2 4 10 8 6 9 7 CIN CFB CE MODE/SYNC LIM VDOUT VDIN VIN (ceramic) VOUT |
同様の部品番号 - XC9223B082DR |
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同様の説明 - XC9223B082DR |
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