Datasheet LTM4664 (Analog Devices) - 9

link to page 103 link to page 25 LTM4664
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal operating temperature range (Note 1, 2, 3). Specified as each individual output channel designated with n (Note 3). TA = 25°C, VINS3 = 12V, RUN_Cn = 3.3V, EXTVCC = 0V, FREQUENCY_SWITCH = 350kHz and VOUTCn commanded to 1.000V unless otherwise noted. Configured with factory default EEPROM settings, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IOUTn(OCL_AVg) Output Current Limit, Time Averaged Time-Averaged Output Inductor Current Limit Inception 34 A Threshold, Commanded by IOUT_OC_FAULT_LIMITn (Note 7) Utilizing MFR_PWM_MODE[7] = 0b, and Using ~IOUT = 34A , Page103
Control Section
V – FBCMn Feedback Input VOSNS _Cn Valid Input Range (Referred to SGND) l –0.1 0.3 V Common Mode Range V + OSNS _Cn Valid Input Range (Referred to SGND) l 3.6 V VOUTn-RNGL Full-Scale Command Voltage Limit Design to 1.5V Operating for Module Range Low (0.5V to 2.75V) MFR_PWM_MODEn[1] = 1b, VOUTn Commanded to 2.75 V Set Point Accuracy 2.75V (Notes 8, 10) –0.5 0.5 % Resolution 12 Bits LSB Step Size 0.688 mV VOUTn-RNGH Full-Scale Command Voltage Limit Design to 1.5V Operating for Module Range High (0.5V to 3.6V) MFR_PWM_MODEn[1] = 0b, VOUTn Commanded to 3.60 V Set Point Accuracy 3.60V (Notes 8, 10) –0.5 0.5 % Resolution 12 Bits LSB Step Size 1.375 mV R + + + VSENSEn VOSNS _Cn Impedance to SGND 0.05V ≤ VVOSNS _Cn – VSGND ≤ 3.3V 50 kΩ tON(MIN) Minimum On-Time (Note 10 ) 60 nsec gm0,1 Resolution COMP0,1 = 1.35V, MFR_PWM_CONFIG[7:5] = 0 to 7 3 Bits Error Amplifier gm(max) MFR_PWW_CONFIG Section (Note 10) 5.76 mmho Error Amplifier gm(min) 1 mmho LSB Step Size 0.68 mmho RCOMP0, 1 Resolution MFR_PWM_CONFIG[4:0] = 0 to 31 5 Bits Compensation Resistor RCOMP(MAX) (See Figure 1, Note 10) 62 kΩ Compensation Resistor RCOMP(MIN) 0.5 kΩ
Analog OV/UV Ch 0,1(Overvoltage/Undervoltage) Output Voltage Supervisor Comparators (VOUT_OV/UV_FAULT_LIMIT and VOUT_OV/UV_WARN_ LIMIT Monitors)
NOV/UV_COMP Resolution, Output (Notes 9, 10) 9 Bits Voltage Supervisors VOV-RNG Output OV Comparator (Notes 9, 10) Limit Design to 1.5V Operating for Module Threshold Detection Range Low Range Scale, MFR_PWM_MODEn[1] = 1b 0.5 2.7 V High Range Scale, MFR_PWM_MODEn[1] = 0b 1 3.6 V VOUSTP Output OV and UV (Notes 9, 10) Comparator Threshold Low Range Scale, MFR_PWM_MODEn[1] = 1b 5.6 mV Programming LSB Step Size High Range Scale, MFR_PWM_MODEn[1] = 0b 11.2 mV VOV-ACC-Cn Output OV Threshold Accuracy (Notes 9, 10) Range Low 0.5V ≤ V + – VOSNS _Cn – VVOSNS _Cn ≤ 2.7V, MFR_PWM_ l ±40 mV MODEn[1] = 1b Range High 1V ≤ V + – VOSNS _Cn – VVOSNS _Cn ≤ 3.6V, MFR_PWM ±1.5 % MODEn[1] = 0b Rev. 0 For more information www.analog.com 9 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