Description
The FAN5232 is a high efficiency and high precision DC/DC controller for PCs. It has a synchronous switcher whose output can be adjusted from 5V up to 80% of Vin. It also has two linear regulators for standby, 3.3V and 5V. The PWM utilizes both input and output voltage feedback in a current-mode control, allowing for fast and stable loop response over a wide range of input and output variations. Synchronous switching provides best efficiency over a wide range of loads. Current sense based on MOSFET RDS,on gives maximum efficiency, while also permitting use of an optional sense resistor for high precision.
The FAN5232 is available in a 14 pin TSSOP package.

FEATUREs
• Three outputs: Adjustable Buck, 3.3V-Always, 5V-Always
• Adjustable synchronous switcher, 5V – 80% Vin
• 1% internal reference precision
• Current mode with voltage feed-forward
• Precision current limit option
• Charge pump works at all loads
• No shoot-through current
• Independent shutdown pins for ACPI
• Power Good, input UVLO, output OV
• 5.6V to 24V input voltage range

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