LTC3889 datasheet(91/118 Pages) AD

91 / 118 page

LTC3888/LTC3888-1/

LTC3888-2

Rev. B

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PMBus COMMAND DETAILS (Output Voltage and Limits)

VOUT_OV_WARN_LIMIT

The VOUT_OV_WARN_LIMIT command sets the value, in volts, of the VSENSE± differential voltage measured by the

ADC that causes an output overvoltage warning. If the VOUT_OV_WARN_LIMIT is exceeded, the device:

• Sets the VOUT Bit in the STATUS_WORD

• Sets the VOUT Overvoltage Warning Bit in the STATUS_VOUT Command

• Notifies the Host by Asserting ALERT, Unless Masked

This command has two data bytes in Linear_16u format.

VOUT_UV_WARN_LIMIT

The VOUT_UV_WARN_LIMIT command sets the value, in volts, of the VSENSE± differnetial voltage measured by the

ADC that causes an output undervoltage warning. If the VOUT_UV_WARN_LIMIT is exceeded, the device:

• Sets the VOUT Bit in the STATUS_WORD

• Sets the VOUT Undervoltage Warning Bit in the STATUS_VOUT Command

• Notifies the Host by Asserting ALERT, Unless Masked

This command has two data bytes in Linear_16u format.

VOUT_UV_FAULT_LIMIT

VOUT_UV_FAULT_LIMIT is the value in voltage the under voltage comparator triggers the LTC3888/3888-2 and the

LTC3888-1 if VOUT_SCALE_LOOP is defined. Otherwise it the under voltage trigger for VFB.

This command has two data bytes in Linear_16u format.

MFR_SPI_DATA (LTC3888)

The MFR_SPI_DATA command returns the existing VOUT offset code programmed by the Serial Peripheral Interface

for each master channel. Refer to the Serial Peripheral Interface in the Operation section for complete details.

This read-only command has one data byte in Linear_16u format.

LTC3889 Datasheet(PDF) 91 Page - Analog Devices