FR9809

The FR9809 is a high-efficiency synchronous mode step-down DC/DC converter with operation voltage in a wide 4.75V to 21V input voltage range. The output current is up to 5A, and the efficiency is over 90%. Controller circuit design by a particular current mode operation provides fast transient response and eases loop stabilization. FR9809 has a very low standby current less than 1μA in shutdown mode. It can be turned on/off by an enable input voltage. Fault protection includes over current protection (OCP), under voltage lockout protection (UVLO), and internal thermal shutdown. The FR9809 has a standard small-outline integrated chip (SOIC) package with eight pins and an exposed pad.

FR9809是一種DC/ DC高效率同步降壓轉換IC，輸入電壓範圍在4.75V至21V，輸出電流高達5A，效率超過90％。內部current mode操作模式能提供快速的暫態響應和線路的穩定性。在關機模式擁有小於1uA的關機電流，故能被輸入電壓開啟/關閉。在保護方面，包括過電流保護（OCP），電壓過低鎖定（UVLO）和過溫關閉保護。而包裝為SOP-8(Exposed Pad)。