General Description
The FAN5240 is a single output 2-Phase synchronous buck controller to power AMD’s mobile CPU core. The FAN5240 includes a 5-bit digital-to-analog converter (DAC) that adjusts the core PWM output voltage from 0.925VDC to 2.0VDC, which may be changed during operation.
   
Features
■ CPU Core power: 0.925V to 2.0V output range
■ ±1% reference precision over temperature
■ Dynamic voltage setting with 5-bit DAC
■ 6V to 24V input voltage range
■ 2 phase interleaved switching
■ Active droop to reduce output capacitor size
■ Differential remote voltage sense
■ High efficiency:
    >90% efficiency over wide load range
    >80% efficiency at light load
■ Excellent dynamic response with Voltage
    Feed-Forward and Average Current Mode control
■ Dynamic duty cycle clamp minimizes inductor current
    build up
■ Lossless current sensing on low-side MOSFET or
    Precision current sensing using sense resistor
■ Fault protections: Over-voltage, Over-current, and
    Thermal Shut-down
■ Controls: Enable, Forced PWM, Power Good, Power
    Good Delay
■ QSOP28, TSSOP28
   
Applications
■ AMD Mobile Athlon™ CPU VCORE Regulator
■ Graphic chip VCORE Regulator