Datasheet LTM4686, LTM4686-1 (Analog Devices) - 116
| Manufacturer | Analog Devices |
| Description | Ultrathin Dual 10A or Single 20A μModule Regulator with Digital Power System Management |
| Pages / Page | 132 / 116 — APPENDIX C: PMBUS COMMAND DETAILS. STATUS_WORD. STATUS_VOUT*. … |
| Revision | B |
| File Format / Size | PDF / 3.3 Mb |
| Document Language | English |
APPENDIX C: PMBUS COMMAND DETAILS. STATUS_WORD. STATUS_VOUT*. STATUS_INPUT. STATUS_BYTE. STATUS_IOUT. STATUS_MFR_SPECIFIC. MFR_COMMON
Model Line for this Datasheet
Text Version of Document
LTM4686/LTM4686-1
APPENDIX C: PMBUS COMMAND DETAILS STATUS_WORD STATUS_VOUT*
15 VOUT 7 VOUT_OV Fault 14 IOUT 6 VOUT_OV Warning 13 INPUT
STATUS_INPUT
5 VOUT_UV Warning 12 MFR_SPECIFIC 7 VIN_OV Fault SVIN 4 VOUT_UV Fault 11 POWER_GOOD# 6 (reads 0) 3 VOUT_MAX Warning 10 (reads 0) 5 VIN_UV Warning SVIN 2 TON_MAX Fault 9 (reads 0) 4 (reads 0) 1 TOFF_MAX Warning 8 (reads 0) 3 Unit Off for Insuffcient SVIN Voltage 0 (reads 0)
STATUS_BYTE
2 (reads 0) (PAGED) 7 BUSY 1 IIN_OC Warning 6 OFF 0 (reads 0) 5 VOUT_OV
STATUS_IOUT
4 IOUT_OC 7 IOUT_OC Fault 3 (reads 0)
STATUS_MFR_SPECIFIC
6 (reads 0) 2 TEMPERATURE 7 Internal Temperature Fault 5 IOUT_OC Warning 1 CML 6 Internal Temperature Warning 4 (reads 0) 0 NONE OF THE ABOVE 5 EEPROM CRC Error (PAGED) 3 (reads 0) 4 Internal PLL Unlocked 2 (reads 0) 3 Fault Log Present 1 (reads 0) 2 (reads 0)
MFR_COMMON
0 (reads 0) 1 VOUT Short Cycled (PAGED) 7 Module Not Driving ALERT Low 0 GPIO Pulled Low By External Device 6 Module Not Busy (PAGED) 5 Internal Calculations Not Pending
STATUS_TEMPERATURE
4 Output Not In Transition
MFR_PADS
7 OT Fault 3 EEPROM Initialized 6 OT Warning 15 VDD33 0V 2 (reads 0) 5 (reads 0) 14 VDD33 UV 1 SHARE_CLK_LOW 4 UT Fault 13 (reads 0) 0 WP Pin High 3 (reads 0) 12 (reads 0) 2 (reads 0) 11 Invalid ADC Result(s) 1 (reads 0)
MFR_INFO
10 SYNC Output Disabled Externally 0 (reads 0) 9 Channel 1 is POWER_GOOD 15 Reserved (PAGED) 8 Channel 0 is POWER_GOOD 14 Reserved 7 LTM4686 Forcing RUN1 Low 13 Reserved
STATUS_CML
6 LTM4686 Forcing RUN0 Low 12 Reserved 5 RUN1 Pin State 7 Invalid/Unsupported Command 11 Reserved 4 RUN0 Pin State 6 Invalid/Unsupported Data 10 Reserved 3 LTM4686 Forcing GPIO1 Low 5 Packet Error Check Failed 9 Reserved 2 LTM4686 Forcing GPIO0 Low 4 Memory Fault Detected 8 Reserved 1 GPIO1 Pin State 3 Processor Fault Detected 7 Reserved 0 GPIO0 Pin State 2 (reads 0) 6 Reserved 46861 F59 1 Other Communication Fault 5 Reserved 0 Other Memory or Logic Fault 4 EEPROM ECC Status 3 Reserved 2 Reserved 1 Reserved 0 Reserved
DESCRIPTION MASKABLE GENERATES ALERT BIT CLEARABLE
General Fault or Warning Event Yes Yes Yes Dynamic No No No Status Derived from Other Bits No Not Directly No
Figure 59. Summary of the Status Registers
Rev. B 116 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 STATUS_WORD STATUS_VOUT*
15 VOUT 7 VOUT_OV Fault 14 IOUT 6 VOUT_OV Warning 13 INPUT
STATUS_INPUT
5 VOUT_UV Warning 12 MFR_SPECIFIC 7 VIN_OV Fault SVIN 4 VOUT_UV Fault 11 POWER_GOOD# 6 (reads 0) 3 VOUT_MAX Warning 10 (reads 0) 5 VIN_UV Warning SVIN 2 TON_MAX Fault 9 (reads 0) 4 (reads 0) 1 TOFF_MAX Warning 8 (reads 0) 3 Unit Off for Insuffcient SVIN Voltage 0 (reads 0)
STATUS_BYTE
2 (reads 0) (PAGED) 7 BUSY 1 IIN_OC Warning 6 OFF 0 (reads 0) 5 VOUT_OV
STATUS_IOUT
4 IOUT_OC 7 IOUT_OC Fault 3 (reads 0)
STATUS_MFR_SPECIFIC
6 (reads 0) 2 TEMPERATURE 7 Internal Temperature Fault 5 IOUT_OC Warning 1 CML 6 Internal Temperature Warning 4 (reads 0) 0 NONE OF THE ABOVE 5 EEPROM CRC Error (PAGED) 3 (reads 0) 4 Internal PLL Unlocked 2 (reads 0) 3 Fault Log Present 1 (reads 0) 2 (reads 0)
MFR_COMMON
0 (reads 0) 1 VOUT Short Cycled (PAGED) 7 Module Not Driving ALERT Low 0 GPIO Pulled Low By External Device 6 Module Not Busy (PAGED) 5 Internal Calculations Not Pending
STATUS_TEMPERATURE
4 Output Not In Transition
MFR_PADS
7 OT Fault 3 EEPROM Initialized 6 OT Warning 15 VDD33 0V 2 (reads 0) 5 (reads 0) 14 VDD33 UV 1 SHARE_CLK_LOW 4 UT Fault 13 (reads 0) 0 WP Pin High 3 (reads 0) 12 (reads 0) 2 (reads 0) 11 Invalid ADC Result(s) 1 (reads 0)
MFR_INFO
10 SYNC Output Disabled Externally 0 (reads 0) 9 Channel 1 is POWER_GOOD 15 Reserved (PAGED) 8 Channel 0 is POWER_GOOD 14 Reserved 7 LTM4686 Forcing RUN1 Low 13 Reserved
STATUS_CML
6 LTM4686 Forcing RUN0 Low 12 Reserved 5 RUN1 Pin State 7 Invalid/Unsupported Command 11 Reserved 4 RUN0 Pin State 6 Invalid/Unsupported Data 10 Reserved 3 LTM4686 Forcing GPIO1 Low 5 Packet Error Check Failed 9 Reserved 2 LTM4686 Forcing GPIO0 Low 4 Memory Fault Detected 8 Reserved 1 GPIO1 Pin State 3 Processor Fault Detected 7 Reserved 0 GPIO0 Pin State 2 (reads 0) 6 Reserved 46861 F59 1 Other Communication Fault 5 Reserved 0 Other Memory or Logic Fault 4 EEPROM ECC Status 3 Reserved 2 Reserved 1 Reserved 0 Reserved
DESCRIPTION MASKABLE GENERATES ALERT BIT CLEARABLE
General Fault or Warning Event Yes Yes Yes Dynamic No No No Status Derived from Other Bits No Not Directly No
Figure 59. Summary of the Status Registers
Rev. B 116 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
