P4GE-V

RT8202L/M Single Synchronous Buck Controller General Description The RT8202L/M PWM controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The RT8202L/M achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The RT8202L is available in a WQFN-16L 4x4 package and the RT8202M is available in a WQFN-16L 3x3 package. Features z z Ultra-High Efficiency Resistor Programmable Current Limit by Low Side RDS(ON) Sense (Lossless Limit) 4700ppm/°C RDS(ON) Current Sensing Quick Load Step Response within 100ns 1% VFB Accuracy over Line and Load Adjustable 0.75V to 3.3V Output Voltage Range 3V to 26V Battery Input Voltage Range Resistor Programmable Frequency Integrated Bootstrap Switch Over Voltage Protection Under Voltage Protection Voltage Ramp Soft-Start Built In Soft Discharge Output Power Good Indicator RoHS Compliant and 100% Halogen Free z z z z z z z z z z z z z Ordering Information RT8202L/M Package Type QW : WQFN-16L 4x4 (W-Type)...