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FR9809 Datasheet(PDF) 1 Page - Fitipower Integrated Technology Inc. |
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FR9809 Datasheet(HTML) 1 Page - Fitipower Integrated Technology Inc. |
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1 / 13 page  1 FR9809-Preliminary 0.4-OCT-2012 FR9809 85T fitipower integrated technology lnc. 21V, 5A, 500KHz Synchronous PWM-Buck DC/DC Converter Pin Assignments SP Package (SOP-8 Exposed Pad) LX GND LX VIN FB VCC BST 2 3 4 6 5 7 8 9 GND 1 SHDN/S Figure 1. Pin Assignment of FR9809 Ordering Information Description FR9809 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 range from 4.75V to 21V, and continuous load current capability is 5A. 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 pin voltage is less than 0.4V, FR9809 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): 110mΩ 20mΩ Internal Compensation Input Operation Voltage Range: 4.75V to 21V 5A 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 FR9809 □□□ G: Green C: Green TR: Tape/Reel Package Type SP: SOP-8 (Exposed Pad) |
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