Datasheet LTM4700 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Dual 50A or Single 100A µModule Regulator with Digital Power System Management |
| Seiten / Seite | 126 / 2 — TABLE OF CONTENTS Features ... 1. Applications .. 1. Typical Application … |
| Dateiformat / Größe | PDF / 2.9 Mb |
| Dokumentensprache | Englisch |
TABLE OF CONTENTS Features ... 1. Applications .. 1. Typical Application .. 1. Description.. 1. Table of Contents .. 2
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TABLE OF CONTENTS Features ... 1
Serial Interface ...36
Applications .. 1
Communication Protection ...36
Typical Application .. 1
Device Addressing ..36
Description.. 1
Responses to VOUT and IIN/IOUT Faults ...37
Table of Contents .. 2
Output Overvoltage Fault Response ...37
Absolute Maximum Ratings .. 4
Output Undervoltage Response ..38
Order Information .. 4
Peak Output Overcurrent Fault Response ...38
Pin Configuration .. 4
Responses to Timing Faults ..38
Electrical Characteristics ... 5
Responses to VIN OV Faults ..38
Typical Performance Characteristics ..12
Responses to OT/UT Faults ...38
Pin Functions ..15
Internal Overtemperature Fault Response ...38
Simplified Block Diagram ...19
External Overtemperature and Undertemperature
Decoupling Requirements ...19
Fault Response..39
Functional Diagram ..20
Responses to Input Overcurrent and Output
Test Circuits ...21
Undercurrent Faults ..39
Operation...23
Responses to External Faults ..39 Power Module Introduction ..23 Fault Logging ..39 Power Module Overview, Major Features ..23 Bus Timeout Protection ..39 EEPROM with ECC .. 24 Similarity Between PMBus, SMBus and I2C 2-Wire Power-Up and Initialization ...25 Interface ...40 Soft-Start ..26 PMBus Serial Digital Interface ..40 Time-Based Sequencing ...26 Figures 7 to 24 PMBus Protocols ...42 Voltage-Based Sequencing ...26
PMBus Command Summary ..45
Shutdown ...27 PMBus Commands ...45 Light-Load Current Operation ...27
Applications Information ..51
Switching Frequency and Phase ...28 VIN to VOUT Step-Down Ratios ..51 PWM Loop Compensation ..28 Input Capacitors ... 51 Output Voltage Sensing ..28 Output Capacitors ... 51 INTVCC and Build-in 5V Bias Converter ..28 Light Load Current Operation ... 51 Output Current Sensing and Sub Mil iohm DCR Switching Frequency and Phase ...52 Current Sensing ..29 Output Current Limit Programming ..53 Input Current Sensing ...29 Minimum On-Time Considerations..54 PolyPhase Load Sharing ...29 Variable Delay Time, Soft-Start and Output Voltage External/Internal Temperature Sense ..30 Ramping ...54 RCONFIG (Resistor Configuration) Pins ..30 Digital Servo Mode ...54 Fault Detection and Handling ..33 Soft Off (Sequenced Off) ..55 Status Registers and ALERT Masking ...34 Undervoltage Lockout ...56 Mapping Faults to FAULT Pins ..36 Fault Detection and Handling ..56 Power Good Pins ..36 Open-Drain Pins ...56 CRC Protection ...36 Phase-Locked Loop and Frequency Synchronization ..57 Input Current Sense Amplifier ...58 Programmable Loop Compensation ...58 Rev 0 2 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
TABLE OF CONTENTS Features ... 1
Serial Interface ...36
Applications .. 1
Communication Protection ...36
Typical Application .. 1
Device Addressing ..36
Description.. 1
Responses to VOUT and IIN/IOUT Faults ...37
Table of Contents .. 2
Output Overvoltage Fault Response ...37
Absolute Maximum Ratings .. 4
Output Undervoltage Response ..38
Order Information .. 4
Peak Output Overcurrent Fault Response ...38
Pin Configuration .. 4
Responses to Timing Faults ..38
Electrical Characteristics ... 5
Responses to VIN OV Faults ..38
Typical Performance Characteristics ..12
Responses to OT/UT Faults ...38
Pin Functions ..15
Internal Overtemperature Fault Response ...38
Simplified Block Diagram ...19
External Overtemperature and Undertemperature
Decoupling Requirements ...19
Fault Response..39
Functional Diagram ..20
Responses to Input Overcurrent and Output
Test Circuits ...21
Undercurrent Faults ..39
Operation...23
Responses to External Faults ..39 Power Module Introduction ..23 Fault Logging ..39 Power Module Overview, Major Features ..23 Bus Timeout Protection ..39 EEPROM with ECC .. 24 Similarity Between PMBus, SMBus and I2C 2-Wire Power-Up and Initialization ...25 Interface ...40 Soft-Start ..26 PMBus Serial Digital Interface ..40 Time-Based Sequencing ...26 Figures 7 to 24 PMBus Protocols ...42 Voltage-Based Sequencing ...26
PMBus Command Summary ..45
Shutdown ...27 PMBus Commands ...45 Light-Load Current Operation ...27
Applications Information ..51
Switching Frequency and Phase ...28 VIN to VOUT Step-Down Ratios ..51 PWM Loop Compensation ..28 Input Capacitors ... 51 Output Voltage Sensing ..28 Output Capacitors ... 51 INTVCC and Build-in 5V Bias Converter ..28 Light Load Current Operation ... 51 Output Current Sensing and Sub Mil iohm DCR Switching Frequency and Phase ...52 Current Sensing ..29 Output Current Limit Programming ..53 Input Current Sensing ...29 Minimum On-Time Considerations..54 PolyPhase Load Sharing ...29 Variable Delay Time, Soft-Start and Output Voltage External/Internal Temperature Sense ..30 Ramping ...54 RCONFIG (Resistor Configuration) Pins ..30 Digital Servo Mode ...54 Fault Detection and Handling ..33 Soft Off (Sequenced Off) ..55 Status Registers and ALERT Masking ...34 Undervoltage Lockout ...56 Mapping Faults to FAULT Pins ..36 Fault Detection and Handling ..56 Power Good Pins ..36 Open-Drain Pins ...56 CRC Protection ...36 Phase-Locked Loop and Frequency Synchronization ..57 Input Current Sense Amplifier ...58 Programmable Loop Compensation ...58 Rev 0 2 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