Description
The FAN5235 is a high efficiency and high precision DC/DC controller for notebook converters. Utilization of both input and output voltage feedback in a current-mode control allows for fast and stable loop response over a wide range of input and output voltage variations. The two main regulators switch out of phase to minimize input ripple current.

FEATUREs
• Synchronous rectification
• ±1% precision internal reference
• >90% efficiency
• Input and output voltage feedback
• 5.4V to 24V input voltage range
• Internally set 300kHz ±15% oscillator
• 5V and 3.3V Main outputs switch out of phase
• 5V-ALWAYS and 3.3V-ALWAYS outputs
• Adjustable boost converter for 12V
• Boost converter slaved to 5V Main
• Input UVLO
• Outputs OVP of Buck Converters
• Precision current limit option for 5V, 3.3V Main
• Power Good Voltage Monitor

APPLICATIONs
• Notebook PCs and PDAs
• Hand-held portable instruments