Dual Mobile-Friendly DDR / Dual-output PWM Controller

More DDR product information
The FAN5236 PWM Controller provides high efficiency and regulation for two output voltages adjustable in the range from 0.9V to 5.5V that are required to power I/O, chip-sets, and memory banks in high-performance notebook computers, PDAs and Internet appliances. Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads. The hysteretic mode of operation CAN be disabled separately on each PWM converter if PWM mode is desired for all load levels. Efficiency is even further enhanced by using MOSFET's RDS(ON) as a Current Sense component.
Feed-forward ramp modulation, average current mode control scheme, and internal feedback compensation provide fast response to load transients. Out-of-phase operation with 180 degree phase shift reduces input current ripple. The controller CAN be transformed into a complete DDR memory power supply solution by activating a designated pin. In DDR mode of operation one of the channels tracks the output voltage of another channel and provides output current sink and source capability -- features essential for proper powering of DDR chips. The buffered reference voltage required by this type of memory is also provided. The FAN5236 monitors these outputs and generates separate PGx (power good) signals when the soft-start is completed and the output is within 10% of its set point. A built-in over-voltage protection prevents the output voltage from going above 120% of the set point. Normal operation is automatically restored when the over-voltage conditions go away. Under-voltage protection Latches the chip off when either output drops below 75% of its set value after the soft start sequence for this output is completed. An adjustable over-current function monitors the output current by sensing the voltage drop across the lower MOSFET If precision current-sensing is required, an external current-sense resistor may optionally be used.
By Fairchild Semiconductor
FAN5236 's PackagesFAN5236 's pdf datasheet
FAN5236MTC TSSOP
FAN5236MTCX TSSOP
FAN5236QSC QSOP
FAN5236QSCX QSOP




FAN5236 Pinout, Pinouts
FAN5236 pinout,Pin out
This is one package pinout of FAN5236,If you need more pinouts please download FAN5236's pdf datasheet.

FAN5236 Application circuits
FAN5236 circuits
This is one application circuit of FAN5236,If you need more circuits,please download FAN5236's pdf datasheet.


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