RT8237E Overview
Description
The RT8237E 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 : 2.7V 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 Current Source for Current Limit RDS(ON)
- Adjustable Current Limit with Low-Side MOSFET
- 4 Selectable Frequency Setting
- Soft-Start Control
- Drives Large Synchronous-Rectifier FETs
- Integrated Boot Switch
