ISL6366IRZ datasheet(13/44 Pages) INTERSIL

13 / 44 page

ISL6366

FN6964.0

January 3, 2011

IMAXS - An input pin to set the maximum current, ICCMAX,

35A when the droop is enabled (RFSS_DRPS = GND). This register

represents the maximum allowed load current for VR1 and

corresponds to a 900mV (typically set) at IMONS. When VR1

droop is disabled (RFSS_DRPS = VCC), the ICCMAX can be

programed to15A, 20A, 25A, and 30A.

TMAX - An input pin to set the maximum temperature register

(TMAX) of the VR0 and VR1 and the thermal trip point of

VR_HOT#. It covers +90°C to +120°C with 5°C/step. The

and VR1, and programs the over-temperature trip point at

VR_HOT#. The typical application should use +100°C or lower

since the NTC thermistor temperature represents the PCB, not

the hottest component on the board. In addition, the NTC

thermistor typically picks up a temperature lower than the PCB

due to the thermal impedance between PCB and NTC.

BTS_DES_TCOMPS (0D):

BTS - An input pin to set the start-up boot voltage register of VR1.

It has four levels: 0, 0.9V, 1.0, and 1.1V for graphic rails with

droop enabled (RFSS_DRPS = GND). When the droop is disabled

(RFSS_DRPS = VCC), the boot levels will be changed to 0, 0.85V,

0.925V, 1.05V for VCCIO and System Agent rails.

DES - An input pin to set the diode emulation (DE) operation

the VR1 always operates in CCM mode. When the diode

emulation is disabled, the output will decay at the rate of setVID

Slow; however, the SVID bus is still be acknowledged of execution

of the command.

TCOMPS - An input pin to set the mis-matching temperature

(+13°C to +43°C) between the actual sensed inductor and the NTC

thermistor at TMS pin. The voltage sensed on the TMS pin is utilized

as the temperature input to adjust the droop current and the

overcurrent protection limit to effectively compensate for the

temperature coefficient of the current sense element of VR1. To

implement the integrated temperature compensation, select a

proper temperature offset “TCOMP,” other than the “OFF” value,

which is to disable the integrated temperature compensation

function. When the VR1 channel’s droop is disabled by pulling

FSS_DRPS pin high with a frequency set resistor, TCOMPS register

will be used to set the address of PMBus, 80-8Eh for VR0 and E0-

EEh for VR1 in ISL6367.

BT_FDVID_TCOMP (0E):

BT - An input pin to set the start-up boot voltage register of VR0.

It has four levels: 0V, 0.9V, 1.0V, and 1.1V for core applications.

When the droop is disabled, the boot levels will be changed to 0V,

1.2V, 1.35V, and 1.5V for memory applications.

FDVID - An input pin to set the slew rate of fast Dynamic VID. It

has choices of 10mV/µs and 20mV/µs. This will only apply to

VR0, not VR1.

TCOMP - An input to set the mis-matching temperature (+13°C to

+43°C) between the actual sensed inductor of VR0 regulator and

the NTC thermistor at the TM pin. The voltage sensed on the TM pin

is utilized as the temperature input to adjust the droop current and

the overcurrent protection limit to effectively compensate for the

temperature coefficient of the current sense element of VR0. To

implement the integrated temperature compensation, select a

proper temperature offset “TCOMP,” other than the “OFF” value,

which is to disable the integrated temperature compensation

function.

NSPI_DE_IMAX (0F):

NPSI - An input pin to set the number of phases dropping at low

power mode. See Table 3 on page 16 for more details.

DE - An input pin to set the diode emulation (DE) operation

the VR0 always operates in CCM mode. When the diode

emulation is disabled, the output will decay at the rate of setVID

Slow; however, the SVID bus is still be acknowledged of execution

of the command.

IMAX - An input pin to set the maximum current, ICCMAX, register

of the VR0 voltage regulator. It has a range of 15A to 165A with

5A/step. In 5- and 6-Phase operation, it will add 90A offset over

the previous range and cover the range of 105A to 255A with

5A/step. This register represents the maximum allowed load

current for VR0 and corresponds to a 900mV (typically set) at

IMON.

NC[1:3] - No connection pins for ISL6366 and ISL6366A.

Reserved for PMBus [I2DATA, PMALERT#, I2CLK] in ISL6367.

NC[4:5] - No connection pins for ISL6366. Reserved for input

current sensing [ISENIN-, ISENIN+] in ISL6366A and ISL6367.

ISL6366IRZ Datasheet(PDF) 13 Page - Intersil Corporation

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