FR9801

fitipower integrated technology lnc. FR9801 21V, 2A, 600KHz Synchronous Step-Dow85nT DC/DC Converter Description The FR9801 is a synchronous step-down DC/DC converter that provides wide 4.5V to 21V input voltage range and 2A continuous load current capability. The FR9801 fault protection includes cycle-by-cycle current limit, UVLO, output overvoltage protection and thermal shutdown. The adjustable soft-start function prevents inrush current at turn-on. This device uses current mode control scheme which provides fast transient response. Internal compensation function reduces external compensation components and simplifies the design process. In shutdown mode, the supply current is less than 1μA. The FR9801 is available in SOT-23-6 package and provides good thermal conductance. Features  High Efficiency up to 94%  Low RDS(ON) Integrated Power MOSFET  Internal Compensation Function  Wide Input Voltage Range: 4.5V to 21V  Adjustable Output Voltage from 0.8V to 17.85V  2A Output Current  Fixed 600KHz Switching Frequency  Current Mode Operation  Cycle-by-Cycle Current Limit  Over-Temperature Protection with Auto Recovery  Output Overvoltage Protection  Under Voltage Lockout  <1μA Shutdown Current  SOT-23-6 Package Applications  STB (Set-Top-Box)  LCD Display, TV  Distributed Power System  Networking, XDSL Modem Pin Assignments S6 Package (SOT-23-6) LX VIN SHDN 654 (Marking) 123 BST GND FB Figure 1. Pin Assignment of FR9801 Ordering Information FR9801□□□ TR: ...