Datasheet LTM4680 (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | Dual 30A or Single 60A µModule Regulator with Digital Power System Management |
| Páginas / Página | 126 / 3 — TABLE OF CONTENTS PMBus Command Summary ..45. Typical Applications ..72. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 7.0 Mb |
| Idioma del documento | Inglés |
TABLE OF CONTENTS PMBus Command Summary ..45. Typical Applications ..72. PMBus Command Details ...77
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TABLE OF CONTENTS PMBus Command Summary ..45
Derating Curves ..69 PMBus Commands ..45 EMI Performance ...70 Table 7. PMBus Commands Summary (Note: Safety Considerations ..70 The Data Format Abbreviations Are Detailed in Layout Checklist/Example ...70 Table 8) ...45
Typical Applications ..72
Table 8. Data Format Abbreviations ...50
PMBus Command Details ...77 Applications Information ..51
Addressing and Write Protect ...77 VIN to VOUT Step-Down Ratios ...51 General Configuration Commands ..79 Input Capacitors .. 51 On/Off/Margin ..80 Output Capacitors .. 51 PWM Configuration ..82 Light Load Current Operation ... 51 Voltage ..85 Switching Frequency and Phase ..52 Input Voltage and Limits ...85 Output Current Limit Programming ...53 Output Voltage and Limits ..86 Minimum On-Time Considerations ...54 Output Current and Limits ..89 Variable Delay Time, Soft-Start and Output Input Current and Limits ..91 Voltage Ramping ...54 Temperature ..92 Digital Servo Mode ..54 Power Stage DCR Temperature Calibration...92 Soft Off (Sequenced Off) ...55 Timing ..93 Undervoltage Lockout ..56 Timing—On Sequence/Ramp ...93 Fault Detection and Handling ...56 Timing—Off Sequence/Ramp ..94 Open-Drain Pins ..56 Precondition for Restart ...95 Phase-Locked Loop and Frequency Synchronization . 57 Fault Response ...95 Input Current Sense Amplifier ..58 Fault Responses Al Faults ..95 Programmable Loop Compensation ..58 Fault Responses Input Voltage ...96 Checking Transient Response ..59 Fault Responses Output Voltage ...96 PolyPhase Configuration ...60 Fault Responses Output Current ...99 Connecting The USB to I2C/SMBus/PMBus Fault Responses IC Temperature .. 100 Control er to the LTM4680 In System ..60 Fault Responses External Temperature ... 101 LTpowerPlay: An Interactive GUI for Digital Power ... 61 Fault Sharing ... 102 PMBus Communication and Command Fault Sharing Propagation .. 102 Processing ...61 Fault Sharing Response .. 104 Thermal Considerations and Output Scratchpad ... 104 Current Derating ..63 Identification ... 105 Tables 10 thru 11: Output Current Derating ...66 Fault Warning and Status .. 106 Table 12. Channel Output Voltage vs Capacitor Telemetry .. 113 Selection, All Ceramic Configuration, 15A to 30A NVM Memory Commands .. 117 Load Step with 15A/µs Slew Rate ..66 Store/Restore ... 117 Table 13. Channel Output Voltage vs Capacitor Fault Logging .. 118 Selection, Bulk and Ceramic Cap Configuration, Block Memory Write/Read .. 122 15A to 30A Load Step with 15A/µs Slew Rate ...67
Package Description ... 123
Table 14. Dual Phase Single Output Voltage vs Table 23. LTM4680 BGA Pinout .. 123 Capacitor Selection, Bulk and Ceramic Cap
Revision History .. 125
Configuration, 30A to 60A Load Step with 30A/µs
Package Photograph ... 126
Slew Rate ..68
Design Resources .. 126 Related Parts .. 126
Rev. B For more information www.analog.com 3 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 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/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 Table 1. VOUTn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Coarse Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 2. VTRIMn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Fine Adjustment Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 3. FSWPH_CFG Pin Strapping Look-Up Table to Set the LTM4680’s Switching Frequency and Channel Phase-Interleaving Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 4. ASEL Pin Strapping Look-Up Table to Set the LTM4680’s Slave Address (Applicable Regardless of MFR_CONFIG_ALL[6] Setting) Table 5. LTM4680 MFR_ADDRESS Command Examples Expressed in 7- and 8-Bit Addressing Fault Detection and Handling Status Registers and ALERT Masking Figure 5. LTM4680 Status Register Summary 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 Table 6. Abbreviations of Supported Data Formats Figure 6. PMBus Timing Diagram Figures 7 to 24 PMBus Protocols PMBus Command Summary PMBus Commands Table 7. PMBus Commands Summary (Note: The Data Format Abbreviations Are Detailed in Table 8) Table 8. Data Format Abbreviations 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 LTM4680 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Tables 10 thru 11: Output Current Derating Table 12. Channel Output Voltage vs Capacitor Selection, All Ceramic Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 13. Channel Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 14. Dual Phase Single Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 30A to 60A Load Step with 30A/µs Slew Rate 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 Power Stage DCR 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 Table 23. LTM4680 BGA Pinout Revision History Package Photograph Design Resources Related Parts
TABLE OF CONTENTS PMBus Command Summary ..45
Derating Curves ..69 PMBus Commands ..45 EMI Performance ...70 Table 7. PMBus Commands Summary (Note: Safety Considerations ..70 The Data Format Abbreviations Are Detailed in Layout Checklist/Example ...70 Table 8) ...45
Typical Applications ..72
Table 8. Data Format Abbreviations ...50
PMBus Command Details ...77 Applications Information ..51
Addressing and Write Protect ...77 VIN to VOUT Step-Down Ratios ...51 General Configuration Commands ..79 Input Capacitors .. 51 On/Off/Margin ..80 Output Capacitors .. 51 PWM Configuration ..82 Light Load Current Operation ... 51 Voltage ..85 Switching Frequency and Phase ..52 Input Voltage and Limits ...85 Output Current Limit Programming ...53 Output Voltage and Limits ..86 Minimum On-Time Considerations ...54 Output Current and Limits ..89 Variable Delay Time, Soft-Start and Output Input Current and Limits ..91 Voltage Ramping ...54 Temperature ..92 Digital Servo Mode ..54 Power Stage DCR Temperature Calibration...92 Soft Off (Sequenced Off) ...55 Timing ..93 Undervoltage Lockout ..56 Timing—On Sequence/Ramp ...93 Fault Detection and Handling ...56 Timing—Off Sequence/Ramp ..94 Open-Drain Pins ..56 Precondition for Restart ...95 Phase-Locked Loop and Frequency Synchronization . 57 Fault Response ...95 Input Current Sense Amplifier ..58 Fault Responses Al Faults ..95 Programmable Loop Compensation ..58 Fault Responses Input Voltage ...96 Checking Transient Response ..59 Fault Responses Output Voltage ...96 PolyPhase Configuration ...60 Fault Responses Output Current ...99 Connecting The USB to I2C/SMBus/PMBus Fault Responses IC Temperature .. 100 Control er to the LTM4680 In System ..60 Fault Responses External Temperature ... 101 LTpowerPlay: An Interactive GUI for Digital Power ... 61 Fault Sharing ... 102 PMBus Communication and Command Fault Sharing Propagation .. 102 Processing ...61 Fault Sharing Response .. 104 Thermal Considerations and Output Scratchpad ... 104 Current Derating ..63 Identification ... 105 Tables 10 thru 11: Output Current Derating ...66 Fault Warning and Status .. 106 Table 12. Channel Output Voltage vs Capacitor Telemetry .. 113 Selection, All Ceramic Configuration, 15A to 30A NVM Memory Commands .. 117 Load Step with 15A/µs Slew Rate ..66 Store/Restore ... 117 Table 13. Channel Output Voltage vs Capacitor Fault Logging .. 118 Selection, Bulk and Ceramic Cap Configuration, Block Memory Write/Read .. 122 15A to 30A Load Step with 15A/µs Slew Rate ...67
Package Description ... 123
Table 14. Dual Phase Single Output Voltage vs Table 23. LTM4680 BGA Pinout .. 123 Capacitor Selection, Bulk and Ceramic Cap
Revision History .. 125
Configuration, 30A to 60A Load Step with 30A/µs
Package Photograph ... 126
Slew Rate ..68
Design Resources .. 126 Related Parts .. 126
Rev. B For more information www.analog.com 3 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 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/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 Table 1. VOUTn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Coarse Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 2. VTRIMn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Fine Adjustment Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 3. FSWPH_CFG Pin Strapping Look-Up Table to Set the LTM4680’s Switching Frequency and Channel Phase-Interleaving Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 4. ASEL Pin Strapping Look-Up Table to Set the LTM4680’s Slave Address (Applicable Regardless of MFR_CONFIG_ALL[6] Setting) Table 5. LTM4680 MFR_ADDRESS Command Examples Expressed in 7- and 8-Bit Addressing Fault Detection and Handling Status Registers and ALERT Masking Figure 5. LTM4680 Status Register Summary 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 Table 6. Abbreviations of Supported Data Formats Figure 6. PMBus Timing Diagram Figures 7 to 24 PMBus Protocols PMBus Command Summary PMBus Commands Table 7. PMBus Commands Summary (Note: The Data Format Abbreviations Are Detailed in Table 8) Table 8. Data Format Abbreviations 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 LTM4680 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Tables 10 thru 11: Output Current Derating Table 12. Channel Output Voltage vs Capacitor Selection, All Ceramic Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 13. Channel Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 14. Dual Phase Single Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 30A to 60A Load Step with 30A/µs Slew Rate 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 Power Stage DCR 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 Table 23. LTM4680 BGA Pinout Revision History Package Photograph Design Resources Related Parts