Datasheet LTM4676A (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management |
| Seiten / Seite | 136 / 2 — Table oF conTenTs Features ... 1. Applications .. 1. Typical Application … |
| Dateiformat / Größe | PDF / 2.1 Mb |
| Dokumentensprache | Englisch |
Table oF conTenTs Features ... 1. Applications .. 1. Typical Application .. 1. Description.. 1. Absolute Maximum Ratings .. 3
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Table oF conTenTs Features ... 1
Open-Drain Pins ...57
Applications .. 1
Phase-Locked Loop and Frequency Synchronization...58
Typical Application .. 1
RCONFIG Pin-Straps (External Resistor
Description.. 1
Configuration Pins) ..59
Absolute Maximum Ratings .. 3
Voltage Selection ...59
Order Information .. 3
Connecting the USB to the I2C/SMBus/PMBus
Pin Configuration .. 3
Control er to the LTM4676A In System ..59
Electrical Characteristics ... 4
LTpowerPlay: An Interactive GUI for Digital Power
Typical Performance Characteristics .. 11
System Management ...63
Pin Functions .. 14
PMBus Communication and Command Processing ...64
Simplified Block Diagram ... 19
Thermal Considerations and Output Current Derating ...65
Decoupling Requirements ... 19
EMI Performance ...73
Functional Diagram .. 20
Safety Considerations .. 74
Test Circuits ... 21
Layout Checklist/Example .. 74
Operation... 22 Typical Applications .. 75
Power Module Introduction ..22
Appendix A ... 81
Power Module Configurability and Readback Data .. 24 Similarity Between PMBus, SMBus and I2C Time-Averaged and Peak Readback Data ...26 2-Wire Interface ...81 Power Module Overview ..30
Appendix B ... 82
EEPROM ...33 PMBus Serial Digital Interface ...82 Serial Interface ...34
Appendix C: PMBus Command Details .. 86
Device Addressing ...35 Addressing and Write Protect ..86 Fault Detection and Handling ...35 General Configuration Registers ..88 Responses to VOUT and IOUT Faults..36 On/Off/Margin ..89 Responses to Timing Faults ...37 PWM Config ...91 Responses to SVIN OV Faults ...38 Voltage ...93 Responses to OT/UT Faults ..38 Current ...96 Responses to External Faults ..38 Temperature ...99 Fault Logging ...38 Timing .. 100 Bus Timeout Protection ...39 Fault Response ... 102
PMBus Command Summary .. 40
Fault Sharing .. 110 PMBus Commands ...40 Scratchpad ... 112 VIN to VOUT Step-Down Ratios ... 51 Identification .. 112 Input Capacitors ... 51 Fault Warning and Status ... 114 Output Capacitors .. 51 Telemetry ... 121 Light Load Current Operation ... 51 NVM (EEPROM) Memory Commands .. 125 Switching Frequency and Phase ..52
Package Description ... 132
Minimum On-Time Considerations ...54
Package Photograph ... 133
Variable Delay Time, Soft-Start and Output Voltage
Package Description ... 134
Ramping ...54
Revision History .. 135
Digital Servo Mode ..55
Typical Application ... 136
Soft Off (Sequenced Off) ...56
Design Resources .. 136
Undervoltage Lockout ..56
Related Parts .. 136
Fault Detection and Handling ...57 4676afa 2 For more information www.linear.com/LTM4676A 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 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 LTM4676A 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 Photograph Package Description Revision History Typical Application Design Resources Related Parts
Table oF conTenTs Features ... 1
Open-Drain Pins ...57
Applications .. 1
Phase-Locked Loop and Frequency Synchronization...58
Typical Application .. 1
RCONFIG Pin-Straps (External Resistor
Description.. 1
Configuration Pins) ..59
Absolute Maximum Ratings .. 3
Voltage Selection ...59
Order Information .. 3
Connecting the USB to the I2C/SMBus/PMBus
Pin Configuration .. 3
Control er to the LTM4676A In System ..59
Electrical Characteristics ... 4
LTpowerPlay: An Interactive GUI for Digital Power
Typical Performance Characteristics .. 11
System Management ...63
Pin Functions .. 14
PMBus Communication and Command Processing ...64
Simplified Block Diagram ... 19
Thermal Considerations and Output Current Derating ...65
Decoupling Requirements ... 19
EMI Performance ...73
Functional Diagram .. 20
Safety Considerations .. 74
Test Circuits ... 21
Layout Checklist/Example .. 74
Operation... 22 Typical Applications .. 75
Power Module Introduction ..22
Appendix A ... 81
Power Module Configurability and Readback Data .. 24 Similarity Between PMBus, SMBus and I2C Time-Averaged and Peak Readback Data ...26 2-Wire Interface ...81 Power Module Overview ..30
Appendix B ... 82
EEPROM ...33 PMBus Serial Digital Interface ...82 Serial Interface ...34
Appendix C: PMBus Command Details .. 86
Device Addressing ...35 Addressing and Write Protect ..86 Fault Detection and Handling ...35 General Configuration Registers ..88 Responses to VOUT and IOUT Faults..36 On/Off/Margin ..89 Responses to Timing Faults ...37 PWM Config ...91 Responses to SVIN OV Faults ...38 Voltage ...93 Responses to OT/UT Faults ..38 Current ...96 Responses to External Faults ..38 Temperature ...99 Fault Logging ...38 Timing .. 100 Bus Timeout Protection ...39 Fault Response ... 102
PMBus Command Summary .. 40
Fault Sharing .. 110 PMBus Commands ...40 Scratchpad ... 112 VIN to VOUT Step-Down Ratios ... 51 Identification .. 112 Input Capacitors ... 51 Fault Warning and Status ... 114 Output Capacitors .. 51 Telemetry ... 121 Light Load Current Operation ... 51 NVM (EEPROM) Memory Commands .. 125 Switching Frequency and Phase ..52
Package Description ... 132
Minimum On-Time Considerations ...54
Package Photograph ... 133
Variable Delay Time, Soft-Start and Output Voltage
Package Description ... 134
Ramping ...54
Revision History .. 135
Digital Servo Mode ..55
Typical Application ... 136
Soft Off (Sequenced Off) ...56
Design Resources .. 136
Undervoltage Lockout ..56
Related Parts .. 136
Fault Detection and Handling ...57 4676afa 2 For more information www.linear.com/LTM4676A 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 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 LTM4676A 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 Photograph Package Description Revision History Typical Application Design Resources Related Parts