Datasheet LTM4700 (Analog Devices) - 112

LTM4700
PMBus COMMAND DETAILS MFR_COMMON
The MFR_COMMON command contains bits that are common to all ADI digital power and telemetry products.
BIT MEANING
7 Chip Not Driving ALERT Low 6 LTM4700 Not Busy 5 Calculations Not Pending 4 LTM4700 Outputs Not in Transition 3 NVM Initialized 2 Reserved 1 SHARE_CLK Timeout 0 WP Pin Status This read-only command has one data byte.
TELEMETRY CMD DEFAULT COMMAND NAME CODE DESCRIPTION TYPE PAGED FORMAT UNITS NVM VALUE
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 Y 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 LTM4700. 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 Reg NA fast ADC read back. Rev 0 112 For more information www.analog.com Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation PMBus Command Summary Applications Information Applications Information-Derating Curves Typical Applications PMBus Command Details Package Description Typical Applications Package Photograph Related Parts Features Applications Typical Application Description Table of Contents 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 Overview, Major Features EEPROM with ECC 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 and Build-in 5V Bias Converter 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 Serial Interface Communication Protection Device Addressing Responses to VOUT and IIN/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 Figures 7 to 24 PMBus Protocols 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 Output Current Limit Programming 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 Input Current Sense Amplifier Programmable Loop Compensation Checking Transient Response PolyPhase Configuration Connecting The USB to I2C/SMBus/PMBus Controller to the LTM4700 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Applications Information-Derating Curves EMI Performance Safety Considerations Layout Checklist/Example Typical Applications 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 Logging Block Memory Write/Read Package Description Typical Applications Package Photograph Related Parts