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the fr9209 is a synchronous step-down dc/dc converter with capacitor-current-sense constant on time (ccs-cot) mode control. the device provides 12a continuous load current capability. adjustable switching frequency, 600khz, 800khz, or 1000khz, the fr9209 provides both forced ccm or pulse skip mode to support high efficiency and reduce power loss.
the fr9209 fault protection includes cycle-by-cycle current limit, short circuit protection, uvlo, thermal shutdown, programmable soft-start function prevents inrush current at turn-on and internal power good function indicates the output is within its nominal voltage range.
the fr9209 use ccs constant on time control that provides fast transient response, the noise immunity and all kinds of very low esr output capacitor for ensuring performance stabilization.
the fr9209 is offered in tqfn-21 (3mm×4mm) package, which provides good thermal conductance.

• low rds(on) integrated power mosfet (15mω/5.5mω)
• wide input voltage range:
• 2.7v to 16v with external 5v vcc bias
• 6 v to 16v with internal bias or external5v vcc bias
• output voltage range: 0.6v to 5.5v
• differential output voltage remote sense
• 12a output current
• ccs-cot mode enables fast transient response
• selectable switching frequency from 600khz, 800khz, and 1000khz
• input under voltage lockout
• pgood active clamped low level during power failure
• selectable pulse skip or forced pwm operation
• programmable soft-start time from 1ms
• programmable accurate current limit level
• hiccup short circuit protection
• over temperature protection with auto recovery
• output voltage discharge
• output voltage tracking
• available in a tqfn-21 (3mm×4mm) package