Datasheet LTM4664 (Analog Devices) - 8

link to page 103 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 DUAL 25A PSM OUTPUT
VINS3 Input DC Voltage Operating l 7 16 V V + – OUTCn Range of Output Voltage VOUTCn Diff Sensed on VOSNS _Cn/VOSNS _Cn-Pin-Pair; l 0.5 1.5 V Regulation Commanded by Serial Bus or with Resistors Present at Start-Up on VOUTCn_CFG, Differential Remote Sense Path Voltage (Notes 4, 6) VOUTCn(DC) Output Voltage, Total Variation with Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b) l 0.995 1.000 1.005 V Line and Load Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b) l 0.985 1.000 1.015 V VOUTCn_CFG Commanded to 1.000V, VOUTCn Low Range (MFR_PWM_MODEn[1] = 1b) (Note 6) VINS3 UVLO Undervoltage Lockout Threshold VINTVCC Falling 3.55 V VINTVCC Rising 3.9 V IINRUSH(VINS3) Input Inrush Current at Start-Up VOUTCn =1V, VINS3 = 12V; No Load Besides Capacitors; 400 mA TON_RISEn = 3ms IS(VINS3,DCM) Input Supply Current in Discontinuous Mode, MFR_PWM_MODEn[0] = 0b, 60 mA Discontinuous Mode Operation IOUTCn = 100mA IS(VINS3,FCM) Input Supply Current in Forced Continuous Mode, MFR_PWM_MODEn[0] = 1b Forced-Continuous Mode Operation IOUTn = 100mA 80 mA IOUTn = 25A VINS3 = 12V, VOUTn = 1V 2.3 A IS(VINS3,SHUTDOWN) Input Supply Current in Shutdown Shutdown, RUN_Cn = 0V 25 mA
Output Specifications
IOUTCn Output Continuous Current Range Utilizing MFR_PWM_MODE[7] = 0 , 0 25 A and Using ~IOUT = 34A , Page103, (Note 4) ΔV ∆ OUTn(LINE) Line Regulation Accuracy Digital Servo Engaged (MFR_PWM_MODEn[6] = 0b) 0.03 %/V V Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b) 0.03 ±0.2 %/V OUTn Open Circuit; IOUTCn = 0A, 7V ≤ VIN ≤ 16V, VOUT Low Range (MFR_PWM_MODEn[1] = 1b), FREQUENCY_SWITCH = 350kHz (Note 6) ΔV ∆ OUTn(LOAD) Load Regulation Accuracy Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b) 0.03 % V Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b) l 0.2 0.5 % OUTn 0A ≤ IOUTn ≤ 25A, VOUT Low Range, (MFR_PWM_MODEn [1] = 1b) (Note 6) VOUTn(AC) Output Voltage Ripple 10 mV fS (Each Channel) VOUTCn Ripple Frequency FREQUENCY_SWITCH Set to 350kHz (0xFABC) l 320 350 380 kHz ΔVOUTCn(START) Turn-On Overshoot TON_RISEn = 3ms (Note 7) 8 mV tSTART Turn-On Start-Up Time Time from VIN Toggling from 0V to 12V to Rising Edge 30 ms PGOOD_Cn, TON_DELAYn = 0ms, TON_RISEn = 3ms tDELAY(0ms) Turn-On Delay Time Time from First Rising Edge of RUN_Cn to Rising Edge l 2.9 3.3 3.7 ms of PGOOD_Cn. TON_DELAYn = 0ms, TON_RISEn = 3ms, VINS3 Having Been Established for at Least 70ms ΔVOUTn(LS) Peak Output Voltage Load: 0A to 12.5A and 12.5A to 0A at 12.5A/μs, 40 mV Deviation for Dynamic Load Step VOUTn = 1V, VINS3 = 12V (Note 7) See Load Transient Graph tSETTLE Settling Time for Load: 0A to 12.5A and 12.5A to 0A at 12.5A/μs, 30 µs Dynamic Load Step VOUTn = 1V, VINS3 = 12V (Note 7) See Load Transient Graph Rev. 0 8 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