ISL8272MAIRZ datasheet(32/59 Pages) RENESAS

32 / 59 page

ISL8272M

FN8670 Rev.5.00

Page 32 of 59

Nov 8, 2017

VOUT_DROOP (28h)

Definition: Sets the effective load line (V/I slope) for the rail in which the device is used. It is the rate, in mV/A, at which the output

voltage decreases (or increases) with increasing (or decreasing) output current for use with Adaptive Voltage Positioning schemes or

multi-module current sharing. In the current sharing configuration, VOUT_DROOP set in each module stands for the droop seen by the

load.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default value: Pin strap setting

Units: mV/A

Range: 0 to 40mV/A

FREQUENCY_SWITCH (33h)

Definition: Sets the switching frequency of the device. The initial default value is defined by a pin strap and this value can be overridden

by writing this command using PMBus. If an external SYNC is utilized, this value should be set as close as possible to the external clock

value. The output must be disabled when writing this command.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: Pin strap setting

Units: kHz

Range: 300kHz to 1066kHz

INTERLEAVE (37h)

Definition: Configures the phase offset of a device that is sharing a common SYNC clock with other devices. The phase offset of each

device can be set to any value between 0° and 360° in 22.5° increments. The internal two phases of the module always maintain a

phase difference of 180°.

Data Length in Bytes: 2

Data Format: BIT

Type: R/W

Default Value: 0000h

Units: N/A

IOUT_CAL_GAIN (38h)

Definition: Sets the effective impedance across the current sense circuit for use in calculating output current at +25°C.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: B370h (0.86mΩ)

Units: mΩ

IOUT_CAL_OFFSET (39h)

Definition: Used to null out any offsets in the output current sensing circuit and to compensate for delayed measurements of current

ramp due to Isense blanking time.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: 0000h (0A)

Units: A

BITS

PURPOSE

VALUE

DESCRIPTION

15:4

Reserved

3:0

Position in Group

0 to 15

Sets position of the device's rail within the group.

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