The FR9204FH is a synchronous step-down DC/DC converter with fast constant on time (FCOT) mode control. The device provides 4.5V to 18V input voltage range and 2.5A continuous load current capability. It is constant on time pulse width modulation (PWM) controller that supports FCOT mode control. Operation frequency depends on Input and output voltage condition. The FR9204FH fault protection includes cycle-by-cycle current limit, short circuit protection, UVLO and thermal shutdown. The soft-start function prevents inrush current at turn-on. The FR9204FH use fast 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 FR9204FH is offered in TSOT-23-6 and SOT-563-6 packages, which provides good thermal conductance.

• Low VIN and Wide VIN Range: 1.75V to 5.5V
• Output Current 300mA*1
• 1% Output Voltage Accuracy
• Output Noise 65μVrms from 10Hz to 100kHz
• VOUT Fixed 1.0V to 3.3V
• Low Dropout Voltage of 160mV at 2.8V/300mA
• Ripple Rejection 65dB at 1kHz
• Low Quiescent Current at 2µA
• Needs Only 1µF Capacitor for Stability
• Thermal Shutdown Protection
• Current Limit Protection
• Current Foldback Protection
• Output Discharge Function
• UTDFN-4L (1.0mm×1.0mm) and SOT-23-5 Packages
• RoHS Compliant

*1 Attention should be paid to the power dissipation of the package when the output current is large.