RT6338EH Datasheet | Richtek

Description The RT6338E/EH family are high efficiency synchronous step-down DC-DC converters with pseudo constant switching frequency 500k Hz and deliver up to 8A output current. The RT6338E/EH operate from 4.5V to 23V input voltage. The output voltage of RT6338E/EH is fixed to 3.36V output voltage. The RT6338E/EH adopts Advanced Constant On-Time (ACOT® ) control architecture that provides ultra-fast transient response and further reduces the external ponent count. In steady states, the ACOT® operates at nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier. By setting the voltage of the EN/MODE pin, RT6338E/EH operates either in diode emulation mode (DEM) or ultrasonic mode (USM) at light load. The USM maintains operation frequency above 25k Hz, which eliminates the acoustic noise. In the DEM, RT6338E/EH provides the best light-load efficiency and improves the acoustic noise with spread spectrum function. RT6338E/EH provides PGOOD indicator for easy system sequence control. Full protection features are also integrated in the device, including the cycle-bycycle current limit, OVP, UVP, input UVLO and OTP. All above functions are integrated in a UQFN-23L 3x3 (FC) package. Features - Input Voltage Range - RT6338E/EH: 4.5V to 23V - Output Voltage - RT6338E/EH: 3.36V - 8A Continuous Output Current - Stable with POSCAP and MLCC Capacitor - Fast Transient Response - Diode Emulation Mode (DEM) for Power Saving - Ultrasonic Mode (USM) for Avoiding Acoustic Noise - Pseudo Constant Switching Frequency 500k Hz in - Internal Power MOSFET Switch 26m (high-side) and 14m (low-side) - LDO - RT6338E/EH: 3.3V/100m A - Overcurrent Limit - RT6338E/EH: 12A - Output Under-/Overvoltage Protection (UVP/OVP) - RT6338E: Latched Mode UVP/OVP - RT6338EH: Hiccup Mode UVP and Non-Latched Mode OVP - Input Undervoltage Lockout (UVLO) - Over-Temperature Protection (OTP) - RT6338E: Latched Mode OTP - RT6338EH: Non-Latched Mode...