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ISL6366
Dual 6-Phase + 1-Phase PWM Controller for VR12/IMVP7 Applications

热度 119

The ISL6366 is a dual PWM controller; its 6-phase PWMs control the microprocessor core or memory voltage regulator, while its single-phase PWM controls the peripheral voltage regulator for graphics, system agent, or processor I/O.

The ISL6366 utilizes Intersil''s proprietary Enhanced Active Pulse Positioning (EAPP) modulation scheme to achieve extremely fast transient response with fewer output capacitors.

The ISL6366 is designed to be compliant to Intel VR12/IMVP7 specifications. It accurately monitors the load current via the IMON pin and reports this information via the IOUT register to the microprocessor, which sends a PSI# signal to the controller at low power mode via SVID bus. The controller enters 1 or 2-phase operation in low power mode (PSI1); in the ultra low power mode (PSI2,3), it operates in single phase with diode emulation option. In low power modes, the magnetic core and switching losses are significantly reduced, yielding high efficiency at light load. After the PSI# signal is
de-asserted, the dropped phase(s) are added back to sustain heavy load transient response and efficiency.

Today''s microprocessors require a tightly regulated output voltage position versus load current (droop). The ISL6366 senses the output current continuously by measuring the voltage across a dedicated current sense resistor or the DCR of the output inductor. The sensed current flows out of the FB pin to develop a precision voltage drop across the feedback resistor for droop control. Current sensing also provides information for channelcurrent balancing, average overcurrent protection and individual phase current limiting. The TM and TMS pins sense an NTC thermistor''s temperature, which is internally digitized for thermal monitoring and for integrated thermal compensation of the current sense elements of the respective regulator.

The ISL6366 features remote voltage sensing and completely eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6366 with other voltage rails.

  • Intel VR12/IMVP7 Compliant
    • SerialVID with Programmable IMAX, TMAX, BOOT, ADDRESS OFFSET Registers
 
Alternatives
Parameters ISL6366 ISL6261 ISL6266A ISL9500
Max # of Outputs2 1 1
Max # of Phases6 2 2
VIN (min) (V)4.75 4.75 4.75 4.75
VIN (max) (V)5.25 24 24 5.25
VOUT (min) (V)0.25 0.3 0.3 0.7
VOUT (max) (V)1.52 1.5 1.5 1.708
IOUT (max) (A)200 50 100 60
VBIAS (V)4.75 to 5.25 4.75 to 5.25 4.75 to 5.25
VIDYes Yes Yes Yes
ApplicationsVR12/IMVP7 IMVP-6 IMVP-6+
Qualification LevelStandard Standard Standard Standard
DroopYes Yes Yes
Integrated MOSFET Driver(s)No No Yes

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