The FR9811 is a synchronous step-down DC/DC converter with fast constant on time (FCOT) mode control. The device provides 4.5V to 23V input voltage range and 2A 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 FR9811 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 FR9811 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 FR9811 is offered in SOT-23-6 package, which provides good thermal conductance.
Low RDS(ON) Integrated Power MOSFET
(145mΩ/90mΩ)
Wide Input Voltage Range: 4.5V to 23V
Output Voltage Range: 0.6V to 8V
2A Output Current
FCOT Mode Enables Fast Transient Response
Pseudo 850kHz Frequency
Input Under Voltage Lockout
Internal 1.5ms Soft-Start
Cycle-by-Cycle Current Limit
Hiccup Short Circuit Protection
Over Temperature Protection with Auto Recovery
SOT-23-6 Package
Applications
STB (Set-Top-Box)
LCD Display, TV
Distributed Power System
Networking, XDSL Modem
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DC-DC降压变换器
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