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