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RT8272 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8272 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 12 page  RT8272 1 DS8272-02 March 2011 www.richtek.com Ordering Information Pin Configurations (TOP VIEW) Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 3A, 24V, 1.2MHz Step-Down Converter Applications Distributive Power Systems Battery Charger DSL Modems Pre-regulator for Linear Regulators General Description The RT8272 is a high voltage buck converter that can support the input voltage range from 4.75V to 24V and the output current can be up to 3A. Current Mode operation provides fast transient response and eases loop stabilization. The chip provides protection functions such as cycle-by- cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 25 μA of supply current. The RT8272 is available in a SOP-8 (Exposed Pad) surface mount package. Features Wide Operating Input Range : 4.75V to 24V Adjustable Output Voltage Range : 0.92V to 15V Output Current up to 3A 25 μμμμμA Low Shutdown Current Power MOSFET : 0.1 Ω Ω Ω Ω Ω High Efficiency up to 95% 1.2MHz Fixed Switching Frequency Stable with Low ESR Output Ceramic Capacitors Thermal Shutdown Protection Cycle-By-Cycle Over Current Protection RoHS Compliant and Halogen Free Typical Application Circuit SOP-8 (Exposed Pad) SS BOOT VIN GND SW FB EN COMP 2 3 4 5 8 7 6 GND 9 Package Type SP : SOP-8 (Exposed Pad-Option 1) RT8272 Lead Plating System G : Green (Halogen Free and Pb Free) VIN EN GND BOOT FB SW 7 5 2 3 1 L 4.7µH 10nF 47µF R1 25.8k R2 10k VOUT 3.3V/3A 10µF Chip Enable VIN 4.75V to 24V RT8272 D1 B330 SS 8 CSS 0.1µF COMP CC 2.2nF RC 39k CP NC 6 4, 9 (Exposed Pad) CBOOT COUT CIN |
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