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GRM31CR60J476M Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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GRM31CR60J476M Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 16 page  RT8278 1 DS8278-02 March 2011 www.richtek.com 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. Pin Configurations (TOP VIEW) Applications DSL Modem for ADSL2+ Standard Distributed Power Systems Pre-Regulator for Linear Regulators SOP8 (Exposed Pad) 2A, 24V, 3MHz Step-Down Converter General Description The RT8278 is a high voltage buck converter that can support an input voltage range from 4.5V to 24V with output current 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 only draws 25 μA of supply current. The RT8278 is available in a SOP-8 (Exposed Pad) package. Features Wide Operating Input Range : 4.5V to 24V Adjustable Output Voltage Range : 0.8V to 15V Output Current up to 2A 25 μμμμμA Low Shutdown Current High Efficiency up to 90% at 2.2MHz Programmable Frequency : 220kHz to 3MHz Internal Soft-Start 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 RT EN FB COMP GND 2 3 4 5 6 7 8 9 Ordering Information Marking Information RT8278 GSPYMDNN RT8278GSP : Product Number YMDNN : Date Code 4.5V to 24V NC VIN EN GND BOOT FB SW 7 5 2 3 1 L 2.2µH 10nF 22µF R1 31.6k R2 10k VOUT 3.3V/2A 10µF Chip Enable VIN RT8278 D B220A RT 8 RRT 24K COMP CC 1nF RC 36k CP 6 4, 9 (Exposed Pad) CBOOT COUT CIN Package Type SP : SOP-8 (Exposed Pad-Option 1) RT8278 Lead Plating System G : Green (Halogen Free and Pb Free) |
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