Fairchild Semiconductor FAN5231
The FAN5231 is a highly integrated power controller, which provides a complete power management solution for mobile CPUs. The IC integrates two PWM controllers and a linear regulator as well as monitoring and protection circuitry into a single 28-lead plastic SSOP package. The two PWM controllers regulate the microprocessor core and I/O voltages with synchronous-rectified buck converters, while the linear regulator powers the CPU clock.| Part No. | FAN5231 |
|---|---|
| Datasheet | FAN5231 Download |
| Manufacturer |  Fairchild Semiconductor |
| Description | Precision Dual PWM Controller And Linear Regulator |
| Buy | Stock & Price |
FEATURES
● Provides 3 Regulated Voltages – Microprocessor core (SpeedStep™-enabled) – Microprocessor I/O – Microprocessor Clock Generator● High Efficiency Over Wide Load Range
● Not Dissipative Current-Sense Scheme – Uses MOSFET’s R DS(ON) – Optional Current-Sense Resistor for Precision Overcurrent
● Adaptive Dead Time Drivers for N-Channel MOSFETs
● Operates from +5V, +3.3V and Battery (5.6-24V) Inputs
● Precision Core Voltage Control: – Remote “Kelvin” Sensing – Summing Current-Mode Control – On-Chip Mode-Compensated “Droop” for Optimum Transient Response and Lower Processor Power Dissipation
● TTL-Compatible 5-Bit Digital Output Voltage Selection – Wide Range - 0.925VDC to 1.3VDC in 25mV Steps, and from 1.3VDC to 2.0VDC in 50mV Steps – Programmable “On-the-Fly” VID code change with customer programmable slew rate and 100ms settling time
● Power-Good Output Voltage Monitor
● No negative Core and I/O voltage on turn-off
● Over-Voltage, Under-Voltage and Over-Current Fault Monitors
● 3...
