RT8209N Overview
Description
The RT8209N/P PWM controller provides 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.
Key Features
- Resistor Programmable Current Limit by Low Side RDS(ON) Sense (Lossless Limit) z 4700ppm/°C Current Sensing
- Quick Load Step Response within 100ns z 1% VFB Accuracy over Line and Load z 4.5V to 26V Battery Input Range
- Resistor Programmable Frequency
- Integrated Bootstrap Switch
- Integrated Negative Current Limiter
- Over/Under Voltage Protection
- Internal Soft-Start and Soft-Discharge Output
- Power Good Indicator
- RoHS Compliant and Halogen Free
