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Notebook and Sub-Notebook Computers
Notebook and Sub-Notebook Computers
2-Cell
3-Cell and 4-Cell Li+ Battery-Powered Devices
Maximum Duty Up to 96%
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 Compliant and Halogen Free
Dual-Channel Synchronous DC/DC Step-Down Controller with 5V/3.3V LDOs
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 diode-emulation mode maximizes ,efficiency for light load applications. The RT8230A/B/C/D/E is available in the ,WQFN-20L 3x3 package.,,
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