Datasheet LTM4664 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 54VIN Dual 25A, Single 50A µModule Regulator with Digital Power System Management |
| Pages / Page | 138 / 3 — TABLE OF CONTENTS. Dual 25A PSM Applications Information–. … |
| File Format / Size | PDF / 3.5 Mb |
| Document Language | English |
TABLE OF CONTENTS. Dual 25A PSM Applications Information–. Derating Curves ...81. Typical Applications ..84
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TABLE OF CONTENTS
Variable Delay Time, Soft-Start and Output PWM Configuration ..95 Voltage Ramping ...66 Voltage ..98 Digital Servo Mode ..66 Input Voltage and Limits ...98 Soft Off (Sequenced Off) ...67 Output Voltage and Limits ..99 Undervoltage Lockout ..68 Output Current and Limits .. 102 Fault Detection and Handling ...68 Input Current and Limits .. 104 Open-Drain Pins ..68 Temperature .. 105 Phase-Locked Loop and Frequency External Temperature Calibration .. 105 Synchronization ...69 Timing .. 106 Input Current Sense Amplifier ..70 Timing—On Sequence/Ramp ... 106 Programmable Loop Compensation ..70 Timing—Off Sequence/Ramp .. 107 Checking Transient Response ..71 Precondition for Restart ... 108 PolyPhase® Configuration ..72 Fault Response ... 108 Connecting the USB to I2C/SMBus/PMBus Fault Responses Al Faults .. 108 Control er to the LTM4664 In-System ...72 Fault Responses Input Voltage.. 109 LTpowerPlay: An Interactive GUI for Fault Responses Output Voltage ... 109 Digital Power ..73 Fault Responses Output Current ... 112 PMBus Communication and Command Fault Responses IC Temperature .. 113 Processing ...73 Fault Responses External Temperature ... 114 Thermal Considerations and Output Fault Sharing ... 115 Current Derating ..75 Fault Sharing Propagation .. 115 Table 10 and Table 11: Output Current Derating Fault Sharing Response .. 117 (Based on Demo Board) ...78 Scratchpad ... 117
Dual 25A PSM Applications Information–
Identification ... 118
Derating Curves ...81
Fault Warning and Status .. 119 EMI Performance ...82 Telemetry .. 126 Safety Considerations ..82 NVM Memory Commands .. 130 Layout Checklist/Example ...83 Store/Restore ... 130
Typical Applications ..84
Fault Logging .. 131
PMBus Command Details ...90
Block Memory Write/Read .. 135 Addressing and Write Protect ...90
Package Description ... 136
General Configuration Commands ..92
Typical Applications .. 138
On/Off/Margin ..93
Related Parts .. 138
Rev. 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics 4:1 Divider Block Diagram Dual 25A Power System Management (PSM) Block Diagram 4:1 Divider Operation 4:1 Divider Description Main Control INTVCCS1,2/EXTVCCS1,2 Power Start-Up and Shutdown Fault Protection and Thermal Shutdown High Side Current Sensing Frequency Selection Power Good and UV (PGOODSn and UVSn pins) Additional Overvoltage Protection 4:1 Divider Application Information Voltage Divider Pre-Balance Before Switching Overcurrent Protection Window Comparator Programming Effective Open Loop Output Resistance and Load Regulation Undervoltage Lockout Fault Response and Timer Programming Design Example Dual 25A PSM Operation PSM Section 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 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 Figure 11 thru Figure 28 PMBus Protocols PMBus Command Summary PMBus Commands Dual 25A PSM 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 LTM4664 In-System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Table 10 and Table 11: Output Current Derating (Based on Demo Board) Dual 25A PSM 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 Related Parts
TABLE OF CONTENTS
Variable Delay Time, Soft-Start and Output PWM Configuration ..95 Voltage Ramping ...66 Voltage ..98 Digital Servo Mode ..66 Input Voltage and Limits ...98 Soft Off (Sequenced Off) ...67 Output Voltage and Limits ..99 Undervoltage Lockout ..68 Output Current and Limits .. 102 Fault Detection and Handling ...68 Input Current and Limits .. 104 Open-Drain Pins ..68 Temperature .. 105 Phase-Locked Loop and Frequency External Temperature Calibration .. 105 Synchronization ...69 Timing .. 106 Input Current Sense Amplifier ..70 Timing—On Sequence/Ramp ... 106 Programmable Loop Compensation ..70 Timing—Off Sequence/Ramp .. 107 Checking Transient Response ..71 Precondition for Restart ... 108 PolyPhase® Configuration ..72 Fault Response ... 108 Connecting the USB to I2C/SMBus/PMBus Fault Responses Al Faults .. 108 Control er to the LTM4664 In-System ...72 Fault Responses Input Voltage.. 109 LTpowerPlay: An Interactive GUI for Fault Responses Output Voltage ... 109 Digital Power ..73 Fault Responses Output Current ... 112 PMBus Communication and Command Fault Responses IC Temperature .. 113 Processing ...73 Fault Responses External Temperature ... 114 Thermal Considerations and Output Fault Sharing ... 115 Current Derating ..75 Fault Sharing Propagation .. 115 Table 10 and Table 11: Output Current Derating Fault Sharing Response .. 117 (Based on Demo Board) ...78 Scratchpad ... 117
Dual 25A PSM Applications Information–
Identification ... 118
Derating Curves ...81
Fault Warning and Status .. 119 EMI Performance ...82 Telemetry .. 126 Safety Considerations ..82 NVM Memory Commands .. 130 Layout Checklist/Example ...83 Store/Restore ... 130
Typical Applications ..84
Fault Logging .. 131
PMBus Command Details ...90
Block Memory Write/Read .. 135 Addressing and Write Protect ...90
Package Description ... 136
General Configuration Commands ..92
Typical Applications .. 138
On/Off/Margin ..93
Related Parts .. 138
Rev. 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics 4:1 Divider Block Diagram Dual 25A Power System Management (PSM) Block Diagram 4:1 Divider Operation 4:1 Divider Description Main Control INTVCCS1,2/EXTVCCS1,2 Power Start-Up and Shutdown Fault Protection and Thermal Shutdown High Side Current Sensing Frequency Selection Power Good and UV (PGOODSn and UVSn pins) Additional Overvoltage Protection 4:1 Divider Application Information Voltage Divider Pre-Balance Before Switching Overcurrent Protection Window Comparator Programming Effective Open Loop Output Resistance and Load Regulation Undervoltage Lockout Fault Response and Timer Programming Design Example Dual 25A PSM Operation PSM Section 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 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 Figure 11 thru Figure 28 PMBus Protocols PMBus Command Summary PMBus Commands Dual 25A PSM 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 LTM4664 In-System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Table 10 and Table 11: Output Current Derating (Based on Demo Board) Dual 25A PSM 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 Related Parts
