LTC3884/LTC3884-1 PMBus COMMAND DETAILS MFR_INFO The MFR_INFO command contains additional status bits that are LTC3884-specific and may be common to multiple ADI PSM products. MFR_INFO Data Contents:BITMEANING 15:5 Reserved. 4 EEPROM ECC status. 0: Corrections made in the EEPROM user space. 1: No corrections made in the EEPROM user space. 3:0 Reserved EEPROM ECC status is updated after each RESTORE_USER_ALL or RESET command, a power-on reset or an EEPROM bulk read operation. This read-only command has two data bytes. TELEMETRYCMDDEFAULTCOMMAND NAMECODE DESCRIPTIONTYPEPAGED FORMAT UNITSNVMVALUE READ_VIN 0x88 Measured input supply voltage. R Word N L11 V NA READ_IIN 0x89 Measured input supply current. R Word N L11 A NA READ_VOUT 0x8B Measured output voltage. R Word Y L16 V NA READ_IOUT 0x8C Measured output current. R Word Y L11 A NA READ_TEMPERATURE_1 0x8D External diode junction temperature. This R Word Y L11 C NA is the value used for all temperature related processing, including IOUT_CAL_GAIN. READ_TEMPERATURE_2 0x8E Internal junction temperature. Does not affect R Word N L11 C NA any other commands. READ_FREQUENCY 0x95 Measured PWM switching frequency. R Word Y L11 Hz NA READ_POUT 0x96 Calculated output power. R Word Y L11 W NA READ_PIN 0x97 Calculated input power. R Word N L11 W NA MFR_PIN_ACCURACY 0xAC Returns the accuracy of the READ_PIN command R Byte N % 5.0% MFR_IOUT_PEAK 0xD7 Report the maximum measured value of R Word Y L11 A NA READ_IOUT since last MFR_CLEAR_PEAKS. MFR_VOUT_PEAK 0xDD Maximum measured value of READ_VOUT R Word Y L16 V NA since last MFR_CLEAR_PEAKS. MFR_VIN_PEAK 0xDE Maximum measured value of READ_VIN since R Word N L11 V NA last MFR_CLEAR_PEAKS. MFR_TEMPERATURE_1_PEAK 0xDF Maximum measured value of external R Word Y L11 C NA Temperature (READ_TEMPERATURE_1) since last MFR_CLEAR_PEAKS. MFR_READ_IIN_PEAK 0xE1 Maximum measured value of READ_IIN R Word N L11 A NA command since last MFR_CLEAR_PEAKS. MFR_READ_ICHIP 0xE4 Measured current used by the LTC3884. R Word N L11 A NA MFR_TEMPERATURE_2_PEAK 0xF4 Peak internal die temperature since last R Word N L11 C NA MFR_CLEAR_PEAKS. MFR_ADC_CONTROL 0xD8 ADC telemetry parameter selected for repeated R/W Byte N N Reg NA fast ADC read back. Rev. F For more information www.analog.com 109 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview Main Control Loop EEPROM Power-Up and Initialization Soft-Start Time-Based Sequencing Voltage-Based Sequencing Shutdown Light-Load Current Operation Switching Frequency and Phase PWM Loop Compensation Output Voltage Sensing INTVCC/EXTVCC Power Output Current Sensing and Sub Milliohm DCR Current Sensing Input Current Sensing PolyPhase Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Detection and Handling Status Registers and ALERT Masking Mapping Faults to FAULT Pins Power Good Pins CRC Protection and ECC Serial Interface Communication Protection Device Addressing Responses to VOUT, IIN and IOUT Faults Output Overvoltage Fault Response Output Undervoltage Response Peak Output Overcurrent Fault Response Responses to Timing Faults Responses to VIN OV Faults Responses to OT/UT Faults Internal Overtemperature Fault Response External Overtemperature and Undertemperature Fault Response Responses to Input Overcurrent and Output Undercurrent Faults Responses to External Faults Fault Logging Bus Timeout Protection Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface PMBus Command Summary PMBus Commands *Data Format Applications Information Current Limit Programming ISENSE0± and ISENSE1± Pins Inductor DCR Sensing Inductor Value Calculation Inductor Core Selection Low Value Resistor Current Sensing Slope Compensation and Inductor Peak Current Power MOSFET and Optional Schottky Diode Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) INTVCC/EXTVCC Power Topside MOSFET Driver Supply (CB, DB) Undervoltage Lockout CIN and COUT Selection Fault Indication Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations External Temperature Sense Input Current Sense Amplifier External Resistor Configuration Pins (RCONFIG) Voltage Selection Frequency Selection Phase Selection Address Selection Using RCONFIG Efficiency Considerations Programmable Loop Compensation Checking Transient Response PolyPhase Configuration Master Slave Operation PC Board Layout Checklist PC Board Layout Debugging Design Example Additional Design Checks Connecting the USB to I2C/SMBus/PMBus Controller to the LTC3884 in System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing PMBus Command Details Addressing and Write Protect General Configuration Commands On/Off/Margin PWM Configuration Voltage Input Voltage and Limits Output Voltage and Limits Output Current and Limits Input Current and Limits Temperature External Temperature Calibration Timing Timing—On Sequence/Ramp Timing—Off Sequence/Ramp Precondition for Restart Fault Response Fault Responses All Faults Fault Responses Input Voltage Fault Responses Output Voltage Fault Responses Output Current Fault Responses IC Temperature Fault Responses External Temperature Fault Sharing Fault Sharing Propagation Fault Sharing Response Scratchpad Identification Fault Warning and Status Telemetry NVM Memory Commands Store/Restore Fault Log Operation Fault Logging Block Memory Write/Read Typical Applications Package Description Revision History Typical Application Related Parts
