RT8237A Overview
Description
The RT8237A/B 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
- Wide Input Voltage Range : 4.5V to 26V
- Output Voltage Range : 0.7V to 3.3V
- Built-in 0.5% 0.7V Reference Voltage
- Quick Load-Step Response within 100ns
- 4700ppm/°C Programmable Current Limit by Low S
