Datasheet LTM4686, LTM4686-1 (Analog Devices) - 110
| Manufacturer | Analog Devices |
| Description | Ultrathin Dual 10A or Single 20A μModule Regulator with Digital Power System Management |
| Pages / Page | 132 / 110 — APPENDIX C: PMBUS COMMAND DETAILS MFR_MODEL. MFR_SERIAL. MFR_SPECIAL_ID. … |
| Revision | B |
| File Format / Size | PDF / 3.3 Mb |
| Document Language | English |
APPENDIX C: PMBUS COMMAND DETAILS MFR_MODEL. MFR_SERIAL. MFR_SPECIAL_ID. FAULT WARNING AND STATUS. DEFAULT. COMMAND NAME
Model Line for this Datasheet
Text Version of Document
LTM4686/LTM4686-1
APPENDIX C: PMBUS COMMAND DETAILS MFR_MODEL
The MFR_MODEL command indicates the manufacturer’s part number of the LTM4686 using ASCII characters. The MFR_MODEL value is “LTM4686 ”. The value consists of 8 ASCII characters and the last character is a blank space punctuation character (“ ”), i.e., ASCII code 0x20 or 32d. This read-only command is in block format.
MFR_SERIAL
The MFR_SERIAL command contains up to 9 bytes of custom formatted data used to uniquely identify the LTM4686 configuration. This read-only command is in block format.
MFR_SPECIAL_ID
The 16-bit word representing the part name. The 0x477 prefix denotes the part is an LTM4686, whereas the X suffix is adjustable by the manufacturer. This read-only command has 2 data bytes.
FAULT WARNING AND STATUS DEFAULT COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED FORMAT UNITS NVM VALUE
CLEAR_FAULTS 0x03 Clear any fault bits that have been set. Send Byte N NA SMBALERT_MASK 0x1B Mask ALERT Activity. Block R/W Y Reg Y See CMD Details MFR_CLEAR_PEAKS 0xE3 Clears all peaks values. Send Byte N NA STATUS_BYTE 0x78 One byte summary of the unit’s fault R/W Byte Y Reg NA condition. STATUS_WORD 0x79 Two byte summary of the unit’s fault condition. R/W Word Y Reg NA STATUS_VOUT 0x7A Output voltage fault and warning status. R/W Byte Y Reg NA STATUS_IOUT 0x7B Output current fault and warning status. R/W Byte Y Reg NA STATUS_INPUT 0x7C Input supply (SVIN) fault and warning status. R/W Byte N Reg NA STATUS_ TEMPERATURE 0x7D TSNSna-sensed fault and warning status for R/W Byte Y Reg NA READ_TEMERATURE_1. STATUS_CML 0x7E Communication and memory fault and R/W Byte N Reg NA warning status. STATUS_MFR_ SPECIFIC 0x80 Manufacturer specific fault and state R/W Byte Y Reg NA information. MFR_PADS 0xE5 Digital status of the I/O pads. R Word N Reg NA MFR_COMMON 0xEF Manufacturer status bits that are common R Byte N Reg NA across multiple ADI ICs/modules. MFR_INFO 0xB6 Manufacturing Specific Information R Word N Reg NA
CLEAR_FAULTS
The CLEAR_FAULTS command is used to clear any fault bits that have been set. This command clears all bits in all status commands simultaneously. At the same time, the device negates (clears, releases) its ALERT pin signal output if the device is asserting the ALERT pin signal. If the fault is still present when the bit is cleared, the fault bit will remain Rev. B 110 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation Power Module Introduction Power Module Configurability and Readback Data Time-Averaged and Peak Readback Data Power Module Overview EEPROM Serial Interface Device Addressing Fault Detection and Handling Responses to VOUT and IOUT Faults Responses to Timing Faults Responses to SVIN OV Faults Responses to OT/UT Faults Responses to External Faults Fault Logging Bus Timeout Protection PMBus Command Summary PMBus Commands Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization RCONFIG Pin-Straps (External Resistor Configuration Pins) Voltage Selection Connecting the USB to the I2C/SMBus/PMBus Controller to the LTM4686 In System LTpowerPlay: An Interactive GUI for Digital Power System Management PMBus Communication and Command Processing Thermal Considerations and Output Current Derating EMI Performance Safety Considerations Layout Checklist/Example Typical Applications Appendix A Similarity Between PMBus, SMBus and I2C 2-Wire Interface Appendix B PMBus Serial Digital Interface Appendix C: PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Current Temperature Timing Fault Response Fault Sharing Scratchpad Identification Fault Warning and Status Telemetry NVM (EEPROM) Memory Commands Package Description Package Photographs Package Description Revision History Typical Application Design Resources Related Parts
APPENDIX C: PMBUS COMMAND DETAILS MFR_MODEL
The MFR_MODEL command indicates the manufacturer’s part number of the LTM4686 using ASCII characters. The MFR_MODEL value is “LTM4686 ”. The value consists of 8 ASCII characters and the last character is a blank space punctuation character (“ ”), i.e., ASCII code 0x20 or 32d. This read-only command is in block format.
MFR_SERIAL
The MFR_SERIAL command contains up to 9 bytes of custom formatted data used to uniquely identify the LTM4686 configuration. This read-only command is in block format.
MFR_SPECIAL_ID
The 16-bit word representing the part name. The 0x477 prefix denotes the part is an LTM4686, whereas the X suffix is adjustable by the manufacturer. This read-only command has 2 data bytes.
FAULT WARNING AND STATUS DEFAULT COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED FORMAT UNITS NVM VALUE
CLEAR_FAULTS 0x03 Clear any fault bits that have been set. Send Byte N NA SMBALERT_MASK 0x1B Mask ALERT Activity. Block R/W Y Reg Y See CMD Details MFR_CLEAR_PEAKS 0xE3 Clears all peaks values. Send Byte N NA STATUS_BYTE 0x78 One byte summary of the unit’s fault R/W Byte Y Reg NA condition. STATUS_WORD 0x79 Two byte summary of the unit’s fault condition. R/W Word Y Reg NA STATUS_VOUT 0x7A Output voltage fault and warning status. R/W Byte Y Reg NA STATUS_IOUT 0x7B Output current fault and warning status. R/W Byte Y Reg NA STATUS_INPUT 0x7C Input supply (SVIN) fault and warning status. R/W Byte N Reg NA STATUS_ TEMPERATURE 0x7D TSNSna-sensed fault and warning status for R/W Byte Y Reg NA READ_TEMERATURE_1. STATUS_CML 0x7E Communication and memory fault and R/W Byte N Reg NA warning status. STATUS_MFR_ SPECIFIC 0x80 Manufacturer specific fault and state R/W Byte Y Reg NA information. MFR_PADS 0xE5 Digital status of the I/O pads. R Word N Reg NA MFR_COMMON 0xEF Manufacturer status bits that are common R Byte N Reg NA across multiple ADI ICs/modules. MFR_INFO 0xB6 Manufacturing Specific Information R Word N Reg NA
CLEAR_FAULTS
The CLEAR_FAULTS command is used to clear any fault bits that have been set. This command clears all bits in all status commands simultaneously. At the same time, the device negates (clears, releases) its ALERT pin signal output if the device is asserting the ALERT pin signal. If the fault is still present when the bit is cleared, the fault bit will remain Rev. B 110 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation Power Module Introduction Power Module Configurability and Readback Data Time-Averaged and Peak Readback Data Power Module Overview EEPROM Serial Interface Device Addressing Fault Detection and Handling Responses to VOUT and IOUT Faults Responses to Timing Faults Responses to SVIN OV Faults Responses to OT/UT Faults Responses to External Faults Fault Logging Bus Timeout Protection PMBus Command Summary PMBus Commands Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization RCONFIG Pin-Straps (External Resistor Configuration Pins) Voltage Selection Connecting the USB to the I2C/SMBus/PMBus Controller to the LTM4686 In System LTpowerPlay: An Interactive GUI for Digital Power System Management PMBus Communication and Command Processing Thermal Considerations and Output Current Derating EMI Performance Safety Considerations Layout Checklist/Example Typical Applications Appendix A Similarity Between PMBus, SMBus and I2C 2-Wire Interface Appendix B PMBus Serial Digital Interface Appendix C: PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Current Temperature Timing Fault Response Fault Sharing Scratchpad Identification Fault Warning and Status Telemetry NVM (EEPROM) Memory Commands Package Description Package Photographs Package Description Revision History Typical Application Design Resources Related Parts