Datasheet LTM4664 (Analog Devices) - 10

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
VUV-RNG Output UV Comparator (Note 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 VUV-ACC Cn Output UV 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 tPROP-OV Output OV Comparator Overdrive to 10% Above Programmed Threshold 100 µs Response Times tPROP-UV Output UV Comparator Underdrive to 10% Below Programmed Threshold 100 µs Response Times
Analog OV/UV VINS3 Input Voltage Supervisor Comparators (Threshold Detectors for VIN_ON and VIN_OFF)
NVINS3-OV/UV-COMP VINS3 OV/UV Comparator (Notes 9, 10) 9 Bits Threshold-Programming Resolution VINS3-OU-RANGE VINS3 OV/UV Comparator ABS MAX = 18V for Module Design l 4.5 16 V Threshold-Programming Range VINS3-OU-STP VINS3 OV/UV Comparator (Note 10) 76 mV Threshold-Programming LSB Step Size VINS3-OU-ACC VINS3 OV/UV Comparator 4.5V < VINS3 ≤ 16V, Operating Range, 16V Max for l ±350 mV Threshold Accuracy Module tPROP-VINS3-LOW-VIN VINS3 OV/UV Comparator Test Circuit 1, and: Response Time, High VIN VIN_ON = 9V; VINS3 Driven from 8.775V to 9.225V 100 µs Operating Configuration VIN_OFF = 9V; VINS3 Driven from 9.225V to 8.775V 100 µs tPROP-VINS3-LOW-VIN VINS3 OV/UV Comparator Test Circuit 2, and: Response Time, Low VIN VIN_ON = 4.5V; VINS3 Driven from 4.225V to 4.725V 100 µs Operating Configuration VIN_OFF = 4.5V; VINS3 Driven from 4.725V to 4.225V 100 µs
Input Voltage (VINS3) Readback (READ_VIN)
NVINS3-RB Input Voltage Readback (Notes 5, 10) 10 Bits Resolution and LSB Step Size 15.625 mV VINS3-F/S Input Voltage Full-Scale (Notes 7, 11) 18V for Module Design 43 V Digitizable Range VINS3-RB-ACC Input Voltage Readback Accuracy READ_VIN, 4.5V ≤ VINS3 ≤ 16V, (VIN = VINS3) l 2 % tCONVERT-VINS3-RB Input Voltage Readback MFR_ADC_CONTROL = 0.00 (Notes 10, 12) 90 ms Update Rate MFR_ADC_CONTROL = 0.01 (Notes 10, 12) 8 ms
Channels 0 and 1 Output Voltage Readback (READ_VOUTn)
NVO-RB Output Voltage Readback (Note 10) 16 Bits Resolution and LSB Step Size 244 µV VO-F/S Output Voltage Full-Scale VRUNn = 0V (Note 10) 8 V Digitizable Range Design Limited to 1.5V V + – O-RB-AC-Cn Output Voltage Readback Accuracy 0.5V ≤ VVOSNS _Cn – VVOSNS _Cn ≤ 1.0V l Within ± 5mV, Reading 1V ≤ VVOSNS+_Cn – VVOSNS – _Cn ≤ 3.6V Within ± 0.5%, Reading
Channels 0 and 1 Output Current (READ_IOUTn)
NIO-RB Output Current Readback (Notes 5, 10) Based on MFR_PWM_MODE[7] = 1 10 Bits Resolution and LSB Step Size Using the OUT_OC_FAULT_LIMIT of 34A 34.1 mA IO-F/S Output Current Full-Scale Digitizable (Notes 5, 10) Based on MFR_PWM_MODE[7] = 1 34 A Range Using the IOUT_OC_FAULT_LIMIT of 40A Rev. 0 10 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