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RT9202PS

製品説明
仕様・特性

RT9202 Single Synchronous Buck PWM DC-DC Controller General Description Features The RT9202 is a single power supply PWM DC-DC converter controller designed to drive N-MOSFET in a synchronous buck topology. The IC integrates the control, output adjustment, monitoring and protection functions in a small 8-pin package. l The RT9202 uses a low gain voltage mode PWM control for simple application design. An internal 0.8V reference allows the output voltage to be precisely regulated to low voltage requirement. A fixed 300kHz oscillator reduces the component size for saving board space. l l l l l l l l l l The RT9202 features over current protection, over voltage protection, and under voltage lock-out. The output current is monitored by sensing the voltage drop across the MOSFET's RDS(ON), which eliminates the need for a current sensing resistor. l Applications l l Ordering Information RT9202 l l l Package Type S : SOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Note : Operate From 5V 0.8V Internal Reference Drive Two N-MOSFETs Voltage Mode PWM Control Fast Transient Response Fixed 300kHz Oscillator Frequency Full 0 to 100% Duty Cycle Internal Soft Start Adaptive Non-Overlapping Gate Driver Over-Current Monitor Uses MOSFET RDS(ON) Over-Voltage Protection Uses Low-Side MOSFET RoHS Compliant and 100% Lead (Pb)-Free l l l l Motherboard Power Regulation for Computers Subsystems Power Supplies Cable Modems, Set Top Box, and DSL Modems DSP and Core Communications processor Supplies Memory Power Supplies Personal Computer Peripherals Industrial Power Supplies 5V-Input DC-DC Regulators Low Voltage Distributed Power Supplies Pin Configurations RichTek Pb-free and Green products are : (TOP VIEW) }RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. }Suitable for use in SnPb or Pb-free soldering processes. }100%matte tin (Sn) plating. BOOT 8 PHASE UGATE 2 7 OCSET GND 3 6 FB LGATE 4 5 VCC SOP-8 DS9202-09 March 2007 www.richtek.com 1

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