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FR9808 Datasheet(PDF) 1 Page - Fitipower Integrated Technology Inc. |
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FR9808 Datasheet(HTML) 1 Page - Fitipower Integrated Technology Inc. |
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1 / 13 page  1 FR9808-1.3-OCT-2012 FR9808 85T fitipower integrated technology lnc. 21V, 4A, 500KHz Synchronous PWM-Buck DC/DC Converter Pin Assignments SP Package (SOP-8 Expose pad ) SW GND SW VIN EN/SYNC FB VCC BS 2 3 4 6 5 7 8 9 GND 1 Figure 1. Pin Assignment of FR9808 Ordering Information Description FR9808 is a high-efficiency synchronous step-down DC/DC converter that employs a special process technique to obtain very low RDS(ON) for the internal metal –oxide–semiconductor field-effect transistor (MOSFET). The input operation voltage is in a wide 4.75V to 21V, and continuous load current capability is 4A. Control circuit is designed by a particular current mode which provides fast transient response and eases loop stabilization. This product has a very low standby current less than 1μA in shutdown mode. When the EN/SYNC pin voltage is less than 0.4V, FR9808 will turn off. Fault protection includes over current protection (OCP), under voltage lockout protection (UVLO) and over temperature protection (OTP) function. This high-efficiency current mode step- down “Green Power Converter” offers the standard SOP-8 package with an exposed pad. Features High Efficiency up to 90% Internal MOSFET RDS(ON): 120mΩ/20mΩ Internal Compensation Input Operation Voltage Range: 4.75V to 21V 4A Continuous Output Current Output Voltage down to 0.805V 500KHz Oscillation Frequency Sync to External Clock from 300KHz to 800KHz Cycle-by-Cycle Current Limit Under Voltage Lockout Over-Temperature Protection with Auto Recovery <1μA Shutdown Current Thermal Enhanced SOP-8 (Exposed Pad) Package RoHS Compliant Applications Networking equipment OLPC, Netbook Distributed power system LCD monitor, TV, STB External HDD Security System FR9808 □□□ G: Green TR: Tape/Reel Package Type SP: SOP-8 (Exposed Pad) |
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