Single 12V Input Supply Dual Regulator The ISL6549 is a dual synchronous buck PWM controller manufactured by INTERSIL (now part of Renesas Electronics). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Input Voltage Range:** 4.5V to 25V
- **Output Voltage Range:** Adjustable from 0.8V to 5.5V
- **Switching Frequency:** Adjustable from 50kHz to 1MHz
- **Duty Cycle Range:** 0% to 100%
- **Maximum Output Current:** Supports high current with external MOSFETs
- **Efficiency:** Up to 95%
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 28-Lead QSOP
### **Descriptions:**
The ISL6549 is a dual-output, synchronous buck PWM controller designed for high-performance voltage regulation applications. It provides precise control for two independent power rails, making it suitable for motherboards, graphics cards, and other multi-rail power systems. The device supports adjustable switching frequency and incorporates advanced control features for optimal performance.
### **Features:**
- **Dual Independent PWM Controllers** for two synchronous buck converters
- **Programmable Soft-Start** for controlled power-up sequencing
- **Adjustable Switching Frequency** (50kHz to 1MHz)
- **Overcurrent Protection (OCP)** with hiccup mode
- **Overvoltage Protection (OVP)**
- **Undervoltage Lockout (UVLO)**
- **Power-Good (PGOOD) Output** for monitoring
- **Synchronous Rectification** for improved efficiency
- **Adjustable Dead-Time Control** to minimize shoot-through
- **Differential Remote Sensing** for accurate voltage regulation
This information is based on the manufacturer's datasheet and technical documentation.
