RT6245 Datasheet | Richtek

Description The RT6245 is a high-performance, synchronous stepdown converter that delivers up to 14A output current with an input supply voltage range of 4.5V to 17V. The output voltage can be programmable from 0.4375V to 1.3875V with I2C controlled 7-Bits VID. The RT6245 adopts Advanced Constant On-Time (ACOT®) control architecture that provides ultrafast transient response and further reduces the external-ponent count. In steady states, the ACOT® operates in nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier. The RT6245A offers automatic PSM that maintains high efficiency during light load operation. The device offers a variety of functions for more design flexibility. The switching frequency, current limit level and VOUT slew rate are selectable via I2C. Independent enable control input pin and power good indicator are also provided for easy sequence control. Besides, the designers can also mand the device to be enabled or shutdown via the I2C interface. To control the inrush current during the startup, the device provides a programmable soft start-up by an external capacitor connected to the SS pin. Fully protection features are also integrated in the device including the cycle-by-cycle current limit control, OVP, UVP, input UVLO and OTP. The RT6245 is available in a thermally enhanced VQFN19L 3.5x3.5 (FC) package. Features - VID Control Range via I2C patible Interface : 0.4375V to 1.3875V in 12.5m V Steps - 4.5V to 17V Input Voltage Range - 14A Output Current Only Support 400k Hz - Integrated 9.8mΩ/4.5mΩ MOSFETs - Stable with Ceramic Output Capacitor - ACOT®Control for Fast Transient Response - Selectable Switching Frequency (400k Hz/800k Hz/ 1200k Hz) - Adjustable Current Limit Level - Adjustable Thermal Shutdown Level - Programmable Soft-Start Time with a Default 2ms - Monotonic Start-Up into Pre-Biased Outputs - 19-Lead VQFN (FC) Package Applications - Industrial and mercial Low Power Systems -...