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the fr9609 is a synchronous step-down dc/dc converter that provides wide 4.5v to 28v input voltage range and 3a continuous load current capability. at light load condition, the fr9609 can operate at power saving mode to support high efficiency and reduce power lose.

the fr9609 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 fr9609 is available in a sop-8 (exposed pad) package, which provides good thermal conductance.

• low rds(on) integrated power mosfet(90mω /70mω)
• internal compensation function
• internal power good function
• wide input voltage range: 4.5v to 28v
• adjustable output voltage down to 0.925v
• 3a output current
• 340khz switching frequency
• adjustable soft-start or internal soft-start
• internal power good function
• cycle-by-cycle current limit
• over-temperature protection with auto recovery
• ovp, uvlo
• hiccup short circuit protection
• sop-8 (exposed pad) package