www.fairchildsemi.com
FAN5230
System Electronics Regulator for Mobile PCs
Features
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www.fairchildsemi.com
FAN5230
System Electronics
Regulator for Mobile PCs
Features
5.4V to 24V input voltage range Five regulated outputs: 5V @ 5A (PWM) 3.3V @ 5A (PWM) 5V @ 50mA Always On (Linear) 3.3V @ 50mA Always On (Linear) 12V/Adjustable @ 120mA Boost (PWM) >96% efficiency Hysteretic mode for light loads PWM mode for normal loads Main
regulators switch out of phase 300kHz fixed frequency switching RDS(ON) current sense over-current Reduced BOM; Max. efficiency Optional current sense resistor for precision over-current detect Power Good signal for all voltages Input under-voltage lock-out (UVLO) Thermal shutdown ACPI compliant 24-pin QSOP 2nd source by Intersil (IPM6220)
Description
The FAN5230 is a high efficiency and high precision multiple-output voltage
regulator for notebook PC and other similar battery-powered applications. It integrates three pulse-width modulated (PWM) switching
regulator controllers and two linear
regulators to convert 5.4V-to-24V notebook battery power into the voltage used by the circuitry that surrounds the microprocessor in these systems. The two primary PWM controllers in the FAN5230 use synchronous-mode rectification to provide 3.3V and 5V at over 5A each. They switch out-of-phase to minimize input ripple-current. 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 variations. PWM control in nor...