RT8230E

® RT8230A/B/C/D/E Dual-Channel Synchronous DC/DC Step-Down Controller with 5V/3.3V LDOs General Description The RT8230A/B/C/D/E is a dual-channel step-down, controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/ 3.3V linear regulators. Each linear regulator provides up to 100mA output current. The 5V linear regulator supplies power to the PWM drivers. The RT8230A/B/C/D/E includes on-board power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. To eliminate noise in audio applications, an ultrasonic mode is included, which maintains the switching frequency above 25kHz. Moreover, the diodeemulation mode maximizes efficiency for light load applications. The RT8230A/B/C/D/E is available in the WQFN-20L 3x3 package. Features  Maximum Duty Up to 96%  CCRCOT Control with 100ns Load Step Response  Wide Input Voltage Range : 5V to 25V  Dual Adjustable Output :  CH1 : 2V to 5.5V  CH2 : 2V to 4V  Fixed 3.3V and 5V LDO Output : 100mA  1% Accuracy on 3.3V LDO Output  Frequency Adjustable Via TON Setting  4700ppm/ °C RDS(ON) Current Sensing  Adjustable Current Limit Combined with Enable Control  Internal Soft-Start and Soft-Discharge  Thermal Shutdown  RoHS ...