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LTC2972 Datasheet(PDF) 37 Page - Linear Technology |
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LTC2972 Datasheet(HTML) 37 Page - Linear Technology |
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37 / 112 page  LTC2972 37 2972fa For more information www.linear.com/LTC2972 OPERATION The OPERATION command is used to turn the unit on and off in conjunction with the CONTROL pin and ON_OFF_CONFIG. This command register responds to the global page command (PAGE = 0xFF). The contents and functions of the data byte are shown in the following tables. A minimum tOFF_MIN wait time must be observed between any OPERATION commands used to turn the unit off and then back on. OPERATION Data Contents (On_off_config_use_pmbus = 1) SYMBOL Action Operation_control[1:0] Operation_margin[1:0] Operation_fault[1:0] Reserved (Read Only) BITS b[7:6] b[5:4] b[3:2] b[1:0] FUNCTION Turn off immediately 00 XX XX 00 Sequence on 10 00 XX 00 Margin low (ignore faults and warnings) 10 01 01 00 Margin low 10 01 10 00 Margin high (ignore faults and warnings 10 10 01 00 Margin high 10 10 10 00 Sequence off with margin to nominal 01 00 XX 00 Sequence off with margin low (ignore faults and warnings) 01 01 01 00 Sequence off with margin low 01 01 10 00 Sequence off with margin high (ignore faults and warnings) 01 10 01 00 Sequence off with margin high 01 10 10 00 Reserved All remaining combinations OPERATION Data Contents (On_off_config_use_pmbus = 0) On or Off SYMBOL Action Operation_control[1:0] Operation_margin[1:0] Operation_fault[1:0] Reserved (Read Only) BITS b[7:6] b[5:4] b[3:2] b[1:0] FUNCTION Output at nominal 00, 01 or 10 00 XX 00 Margin low (ignore faults and warnings) 00, 01 or 10 01 01 00 Margin low 00, 01 or 10 01 10 00 Margin high (ignore faults and warnings 00, 01 or 10 10 01 00 Margin high 00, 01 or 10 10 10 00 Reserved All remaining combinations PMBus COMMAND DESCRIPTION |
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