The FAN5232 is a synchronous buck PWM controller from Fairchild Semiconductor (now ON Semiconductor). It is designed for high-performance CPU and memory power supplies, offering efficiency and precise voltage regulation. Its features include adaptive voltage positioning and overcurrent protection.

Applications

• Desktop and Notebook CPU Power Supplies
• Memory Power Supplies
• Graphics Card Power Supplies
• High-Current DC-DC Converters

Features

• Synchronous Rectification for High Efficiency
• Adaptive Voltage Positioning (AVP)
• Adjustable Switching Frequency
• Overcurrent Protection (OCP)
• Undervoltage Lockout (UVLO)

Benefits

• High efficiency reduces power dissipation and heat generation
• AVP optimizes transient response and reduces output capacitance requirements
• Adjustable switching frequency allows optimization for different applications
• OCP protects the power supply and load from overcurrent conditions

Specifications (Typical)

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 1MHz
• Overcurrent Protection Threshold: Adjustable
• Operating Temperature Range: -40°C to +85°C

As an end-of-life product, consider ON Semiconductor's website for potential replacement parts. Check for updated PWM controllers with similar specifications.