Description
The FR9889 is a synchronous step-down DC/DC converter that provides wide 4.5V to 23V input voltage range and 3A continuous load current capability. At light load condition, the FR9889 can operate at power saving mode to support high efficiency and reduce power lose.
The FR9889 fault protection includes cycle-by-cycle current limit, UVLO, output overvoltage protection and thermal shutdown. The 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 about 1µA.
The FR9889 is available in a SOP-8 exposed pad package, which provides good thermal conductance.
Features
Low RDS(ON) Integrated Power MOSFET(120mΩ /100mΩ)
Internal Compensation Function
Internal Power Good Function
Wide Input Voltage Range: 4.5V to 23V
Adjustable Output Voltage Down to 0.925V
3A Output Current
340kHz Switching Frequency
External Programmable Soft-Start or Internal 600µs Soft-Start
Cycle-by-Cycle Current Limit
Over-Temperature Protection with Auto Recovery
OVP, UVLO
Hiccup Short Circuit Protection
SOP-8 Exposed Pad Package
Applications
STB (Set-Top-Box)
LCD Display, TV
Distributed Power System
Networking, XDSL Modem
