RT9232

RT9232 Programmable Frequency Synchronous Buck PWM Controller General Description The RT9232 is a single-phase synchronous buck PWM DC-DC converter controller designed to drive two N-Channel MOSFET. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirement with an internal 0.8V ± 1% reference. The RT9232 uses an external compensated, single feedback loop voltage mode PWM control for fast transient response. An oscillator with Programmable frequency (50kHz to 800kHz) reduces the external inductor and capacitor component size for saving PCB board area. The RT9232 provides fast transient response to satisfy high current output applications (up to 25A) while minimizing external components. It is suitable for highperformance graphic processors, DDR and VTT power. The RT9232 integrates complete protect functions such as Soft Start, Output Enable, UVLO(under-voltage lockout) into a small 14-pin package. Features Single IC Supply Voltage: 12V Single phase DC/DC Buck Converter with `High Output Current (up to 25A ) `Low Output Voltage (down to 0.8V ) `High Input Voltage (up to 12V ) Operate from 12V, 5V or 3.3V Input 0.8V ± 1% Internal Reference Adaptive Non-Overlapping Gate Drivers Integrated High-Current, HV Gate Drivers External Programmable Soft Start External Programmable Frequency (Range: 50kHz to 800kHz, 200kHz Free Run ) Integrated Output Short Circuit Protection On/Off Control by Enable Pin Drives Two N-Channel MOSFET Full 0 to...