Datasheet LTM4680 (Analog Devices) - 4

LTM4680
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Terminal Voltages:
TOP VIEW V + V – V + − OSNS1 OSNS1 INn (Note 4), SVIN, IIN , IIN .. –0.3V to 18V A (SV + + − SW1 GND VOUT1 IN – IIN ), (IIN – IIN ) ... –0.3V to 0.3V B SW0, SW1 .. −1V to 18V, −5V to 18V Transient V V OUT1 TRIM0_ COMP1b WP CFG INTV C CC, EXTVCC... –0.3V to 6V SHARE V SV GND IN TSNS1b PGOOD1 COMP1a CLK VDD25 OUTn .. –0.3V to 3.6V D V + + GND F VTRIM1_ V VOUT1_ OSNS0 , VOSNS1 ... –0.3V to 6V INTV SWPH_ OUT0_ CC VDD33 CFG CFG CFG CFG V − − E OSNS0 , VOSNS1 .. –0.3V to 0.3V VIN1 EXTV RUNn, SDA, SCL, ALERT ... –0.3V to 5.5V CC RUN1 ASEL F FSWPH_CFG, VOUT0,1_CFG, GND SGND FAULT1 RUN0 G VTRIM0,1_CFG, ASEL ... –0.3V to 2.75V VIN0 COMP0b SDA ALERT FAULT0 FAULTn, SYNC, SHARE_CLK, WP, H PGOOD0, PGOOD1 ... −0.3V to 3.6V I + IN PGOOD0 TSNS0b COMP0a TSNS1a TSNS0a SCL J COMPna, COMPnb, .. –0.3V to 2.7V I – GND IN SYNC TSNS0a, TSNS1a .. –0.3V to 2.2V K GND VOUT0 TSNS0b, TSNS1b .. –0.3V to 0.8V L V
Temperatures
SW0 OUT0 V + – OSNS0 VOSNS0 M Internal Operating Temperature Range 1 2 3 4 5 6 7 8 9 10 11 12 (Notes 2, 13, 16, 17) .. –40°C to 125°C BGA PACKAGE Storage Temperature Range .. –55°C to 125°C 144-LEAD (16mm × 16mm × 7.82mm) T Peak Solder Reflow Package Body Temperature ... 245°C JMAX = 125°C, θJCtop = 3.3°C/W, θJCbottom = 2°C/W, θJB = 2°C/W, θJA = 7°C/W WEIGHT = 7.4 GRAMS (Not recommended for upside down reflow.)
ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (See Note 2)
LTM4680EY#PBF LTM4680Y SAC305 (RoHS) e1 LTM4680IY#PBF LTM4680Y BGA 4 –40°C to 125°C LTM4680IY SnPb (63/37) LTM4680Y e0 Contact the factory for parts specified with wider operating temperature • Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Device temperature grade is indicated by a label on the shipping Procedures container. Pad or ball finish code is per IPC/JEDEC J-STD-609. • LGA and BGA Package and Tray Drawings Rev. A 4 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 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/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 Table 1. VOUTn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Coarse Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 2. VTRIMn_CFG Pin Strapping Look-Up Table for the LTM4680’s Output Voltage, Fine Adjustment Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 3. FSWPH_CFG Pin Strapping Look-Up Table to Set the LTM4680’s Switching Frequency and Channel Phase-Interleaving Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b) Table 4. ASEL Pin Strapping Look-Up Table to Set the LTM4680’s Slave Address (Applicable Regardless of MFR_CONFIG_ALL[6] Setting) Table 5. LTM4680 MFR_ADDRESS Command Examples Expressed in 7- and 8-Bit Addressing Fault Detection and Handling Status Registers and ALERT Masking Figure 5. LTM4680 Status Register Summary 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 Table 6. Abbreviations of Supported Data Formats Figure 6. PMBus Timing Diagram Figures 7 to 24 PMBus Protocols PMBus Command Summary PMBus Commands Table 7. PMBus Commands Summary (Note: The Data Format Abbreviations Are Detailed in Table 8) Table 8. Data Format Abbreviations 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 LTM4680 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Tables 10 thru 11: Output Current Derating Table 12. Channel Output Voltage vs Capacitor Selection, All Ceramic Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 13. Channel Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 15A to 30A Load Step with 15A/µs Slew Rate Table 14. Dual Phase Single Output Voltage vs Capacitor Selection, Bulk and Ceramic Cap Configuration, 30A to 60A Load Step with 30A/µs Slew Rate 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 Power Stage DCR 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 Table 23. LTM4680 BGA Pinout Package Photograph Design Resources Related Parts