LTC2978C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2978C' PDF : 64 Pages View PDF
LTC2978
Table of Contents
Features...................................................... 1
Applications................................................. 1
Typical Application......................................... 1
Description.................................................. 1
Absolute Maximum Ratings............................... 4
Order Information........................................... 4
Pin Configuration........................................... 4
Electrical Characteristics.................................. 5
PMBus Timing Diagram.................................... 9
Typical Performance Characteristics................... 10
Pin Functions............................................... 14
Block Diagram.............................................. 16
Operation................................................... 17
Operation Overview................................................. 17
EEPROM.............................................................. 17
Reset....................................................................... 18
Write-Protect Pin..................................................... 18
Other Operations..................................................... 18
Clock Sharing...................................................... 18
PMBus Serial Digital Interface................................. 19
PMBus................................................................. 19
Device Address....................................................22
Processing Commands........................................23
PMBus Command Summary............................. 24
Summary Table.................................................... 24
Data Formats....................................................... 28
PMBus Command Description........................... 29
Operation, Mode and EEPROM Commands.............29
PAGE................................................................... 29
OPERATION......................................................... 30
ON_OFF_CONFIG................................................. 31
CLEAR_FAULTS.................................................. 31
WRITE_PROTECT................................................ 32
STORE_USER_ALL and RESTORE_USER_ALL.. 32
CAPABILITY......................................................... 32
VOUT_MODE....................................................... 33
Output Voltage Related Commands.........................33
VOUT_COMMAND, VOUT_MAX, VOUT_MARGIN_
HIGH, VOUT_MARGIN_LOW, VOUT_OV_FAULT_
LIMIT, VOUT_OV_WARN_LIMIT, VOUT_UV_
WARN_LIMIT, VOUT_UV_FAULT_LIMIT, POWER_
GOOD_ON and POWER_GOOD_OFF...................33
Input Voltage Related Commands............................33
VIN_ON, VIN_OFF, VIN_OV_FAULT_LIMIT, VIN_
OV_WARN_LIMIT, VIN_UV_WARN_LIMIT and
VIN_UV_FAULT_LIMIT........................................ 33
Temperature Related Commands.............................34
OT_FAULT_LIMIT, OT_WARN_LIMIT, UT_WARN_
LIMIT and UT_FAULT_LIMIT................................34
Timer Limits............................................................34
TON_DELAY, TON_RISE, TON_MAX_FAULT_
LIMIT and TOFF_DELAY......................................34
Fault Response for Voltages Measured by the High
Speed Supervisor....................................................35
VOUT_OV_FAULT_RESPONSE and VOUT_UV_
FAULT_RESPONSE.............................................. 35
Fault Response for Values Measured by the ADC....36
OT_FAULT_RESPONSE, UT_FAULT_RESPONSE,
VIN_OV_FAULT_RESPONSE and VIN_UV_FAULT_
RESPONSE.......................................................... 36
Timed Fault Response.............................................36
TON_MAX_FAULT_RESPONSE........................... 36
Status Commands................................................... 37
STATUS_BYTE:.................................................... 37
STATUS_WORD:.................................................. 38
STATUS_VOUT.................................................... 38
STATUS_INPUT................................................... 39
STATUS_TEMPERATURE..................................... 39
STATUS_CML...................................................... 40
STATUS_MFR_SPECIFIC..................................... 40
ADC Monitoring Commands.................................... 41
READ_VIN........................................................... 41
READ_VOUT........................................................ 41
READ_TEMPERATURE_1 ................................... 41
PMBUS_REVISION.............................................. 41
Manufacturer Specific Commands........................... 42
MFR_CONFIG_LTC2978...................................... 42
MFR_CONFIG_ALL_LTC2978............................. 43
MFR_FAULTz0_PROPAGATE, MFR_FAULTz1_
PROPAGATE........................................................ 44
MFR_PWRGD_EN............................................... 45
MFR_FAULTB00_RESPONSE, MFR_FAULTB01_
RESPONSE, MFR_FAULTB10_RESPONSE and
MFR_FAULTB11_RESPONSE............................... 46
2978fd
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