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The RT6541D PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage 0.77V. 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 RT6541D 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 and enter diode emulation mode at light load condition. The buck conversion allows this device to directly step down high voltage batteries at the highest possible efficiency. The RT6541D is available in a WDFN-14L 3x2 package.
Built-in 1% Reference Voltage
4700ppm/°C Programmable Current Limit by Low- Side RDS(ON) Sensing
3V to 26V Battery Input Range
Drives Large Synchronous Rectifier FETs
Integrated Boost Switch
Over/Under-Voltage Protection
Thermal Shutdown
Power Good Indicator
RoHS Compliant and Halogen Free
Tiny 14-Lead WDFN Package
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