Datasheet LTM4664 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 54VIN Dual 25A, Single 50A µModule Regulator with Digital Power System Management |
| Pages / Page | 138 / 2 — TABLE OF CONTENTS Features ... 1. Applications .. 1. Typical Application … |
| File Format / Size | PDF / 3.5 Mb |
| Document Language | English |
TABLE OF CONTENTS Features ... 1. Applications .. 1. Typical Application .. 1. Description.. 1. Absolute Maximum Ratings .. 4
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TABLE OF CONTENTS Features ... 1
Output Current Sensing and Sub Mil iohm DCR
Applications .. 1
Current Sensing ... 41
Typical Application .. 1
Input Current Sensing .. 41
Description.. 1
PolyPhase Load Sharing .. 41
Absolute Maximum Ratings .. 4
External/Internal Temperature Sense ...42
Order Information .. 4
RCONFIG (Resistor Configuration) Pins ...42
Pin Configuration .. 4
Fault Detection and Handling ...45
Electrical Characteristics ... 5
Status Registers and ALERT Masking ..46
Typical Performance Characteristics ..15
Mapping Faults to FAULT Pins ...48
4:1 Divider Block Diagram ..25
Power Good Pins ...48
Dual 25A Power System Management (PSM)
CRC Protection ..48
Block Diagram ...26
Serial Interface ..48
4:1 Divider Operation ..27
Communication Protection ..48 4:1 Divider Description ...27 Device Addressing ...48 Main Control ...27 Responses to VOUT and IIN/IOUT Faults ..49 INTVCCS1,2/EXTVCCS1,2 Power ..27 Output Overvoltage Fault Response ...49 Start-Up and Shutdown ..28 Output Undervoltage Response ...50 Fault Protection and Thermal Shutdown ...28 Peak Output Overcurrent Fault Response ..50 High Side Current Sensing ..28 Responses to Timing Faults ...50 Frequency Selection ..28 Responses to VIN OV Faults ...50 Power Good and UV (PGOODSn and UVSn pins) ..29 Responses to OT/UT Faults ..50 Additional Overvoltage Protection ..29 Internal Overtemperature Fault Response ..50
4:1 Divider Application Information ..30
External Overtemperature and Undertemperature Voltage Divider Pre-Balance Before Switching..30 Fault Response .. 51 Overcurrent Protection ...31 Responses to Input Overcurrent and Output Window Comparator Programming ..31 Undercurrent Faults ... 51 Effective Open Loop Output Resistance and Responses to External Faults ... 51 Load Regulation ..32 Fault Logging ... 51 Undervoltage Lockout ...32 Bus Timeout Protection ... 51 Fault Response and Timer Programming ..32 Similarity Between PMBus, SMBus and I2C Design Example ..33 2-Wire Interface ...52
Dual 25A PSM Operation ..35
PMBus Serial Digital Interface ...52 PSM Section Overview, Major Features ..35 Figure 11 thru Figure 28 PMBus Protocols ...54 EEPROM with ECC ...36
PMBus Command Summary ..57
Power-Up and Initialization ..37 PMBus Commands ..57 Soft-Start ...38
Dual 25A PSM Applications Information ..63
Time-Based Sequencing ..38 VIN to VOUT Step-Down Ratios ...63 Voltage-Based Sequencing ..38 Input Capacitors ..63 Shutdown ..39 Output Capacitors ..63 Light-Load Current Operation ..39 Light Load Current Operation ...63 Switching Frequency and Phase ...40 Switching Frequency and Phase ..64 PWM Loop Compensation ...40 Output Current Limit Programming ...65 Output Voltage Sensing ...40 Minimum On-Time Considerations ...66 INTVCC/EXTVCC Power ..40 Rev. 0 2 For more information www.analog.com 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 Features ... 1
Output Current Sensing and Sub Mil iohm DCR
Applications .. 1
Current Sensing ... 41
Typical Application .. 1
Input Current Sensing .. 41
Description.. 1
PolyPhase Load Sharing .. 41
Absolute Maximum Ratings .. 4
External/Internal Temperature Sense ...42
Order Information .. 4
RCONFIG (Resistor Configuration) Pins ...42
Pin Configuration .. 4
Fault Detection and Handling ...45
Electrical Characteristics ... 5
Status Registers and ALERT Masking ..46
Typical Performance Characteristics ..15
Mapping Faults to FAULT Pins ...48
4:1 Divider Block Diagram ..25
Power Good Pins ...48
Dual 25A Power System Management (PSM)
CRC Protection ..48
Block Diagram ...26
Serial Interface ..48
4:1 Divider Operation ..27
Communication Protection ..48 4:1 Divider Description ...27 Device Addressing ...48 Main Control ...27 Responses to VOUT and IIN/IOUT Faults ..49 INTVCCS1,2/EXTVCCS1,2 Power ..27 Output Overvoltage Fault Response ...49 Start-Up and Shutdown ..28 Output Undervoltage Response ...50 Fault Protection and Thermal Shutdown ...28 Peak Output Overcurrent Fault Response ..50 High Side Current Sensing ..28 Responses to Timing Faults ...50 Frequency Selection ..28 Responses to VIN OV Faults ...50 Power Good and UV (PGOODSn and UVSn pins) ..29 Responses to OT/UT Faults ..50 Additional Overvoltage Protection ..29 Internal Overtemperature Fault Response ..50
4:1 Divider Application Information ..30
External Overtemperature and Undertemperature Voltage Divider Pre-Balance Before Switching..30 Fault Response .. 51 Overcurrent Protection ...31 Responses to Input Overcurrent and Output Window Comparator Programming ..31 Undercurrent Faults ... 51 Effective Open Loop Output Resistance and Responses to External Faults ... 51 Load Regulation ..32 Fault Logging ... 51 Undervoltage Lockout ...32 Bus Timeout Protection ... 51 Fault Response and Timer Programming ..32 Similarity Between PMBus, SMBus and I2C Design Example ..33 2-Wire Interface ...52
Dual 25A PSM Operation ..35
PMBus Serial Digital Interface ...52 PSM Section Overview, Major Features ..35 Figure 11 thru Figure 28 PMBus Protocols ...54 EEPROM with ECC ...36
PMBus Command Summary ..57
Power-Up and Initialization ..37 PMBus Commands ..57 Soft-Start ...38
Dual 25A PSM Applications Information ..63
Time-Based Sequencing ..38 VIN to VOUT Step-Down Ratios ...63 Voltage-Based Sequencing ..38 Input Capacitors ..63 Shutdown ..39 Output Capacitors ..63 Light-Load Current Operation ..39 Light Load Current Operation ...63 Switching Frequency and Phase ...40 Switching Frequency and Phase ..64 PWM Loop Compensation ...40 Output Current Limit Programming ...65 Output Voltage Sensing ...40 Minimum On-Time Considerations ...66 INTVCC/EXTVCC Power ..40 Rev. 0 2 For more information www.analog.com 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
