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RT8270 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8270 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 12 page  RT8270 1 DS8270-01 March 2011 www.richtek.com Ordering Information Pin Configurations (TOP VIEW) SOP-8 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. 2A, 22V, 1.2MHz Step-Down Converter Applications Distributive Power Systems Battery Charger DSL Modems Pre-regulator for Linear Regulators Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area, otherwise visit our website for detail. General Description The RT8270 is an asynchronous high voltage buck converter that can support the input voltage range from 4.75V to 22V and the output current can be up to 2A. 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 RT8270 is available in a SOP-8 surface mount package. Features Wide Operating Input Range : 4.75V to 22V Adjustable Output Voltage Range : 1.222V to 16V Output Current up to 2A 25 μμμμμA Low Shutdown Current Power MOSFET : 0.18 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 BOOT VIN SW GND NC EN FB COMP 2 3 4 5 6 7 8 Package Type S : SOP-8 RT8270 Lead Plating System G : Green (Halogen Free and Pb Free) VIN EN GND BOOT FB SW 7 5 2 3 1 L1 4.7µH CB 10nF COUT 22µF R1 17k R2 10k VOUT 3.3V/2A CIN 10µF Chip Enable VIN 4.75V to 22V RT8270 D1 B330 COMP CC 1.8nF RC 18k CP NC 6 4 |
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Similar Description - RT8270 |
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