Datasheet LTC3887, LTC3887-1, LTC3887-2 (Analog Devices) - 5

LTC3887/LTC3887-1/ LTC3887-2
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION JUNCTION TEMPERATURE RANGE
LTC3887EUJ#PBF LTC3887EUJ#TRPBF LTC3887UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ#PBF LTC3887IUJ#TRPBF LTC3887UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887EUJ-1#PBF LTC3887EUJ-1#TRPBF LTC3887UJ-1 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ-1#PBF LTC3887IUJ-1#TRPBF LTC3887UJ-1 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887EUJ-2#PBF LTC3887EUJ-2#TRPBF LTC3887UJ-2 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ-2#PBF LTC3887IUJ-2#TRPBF LTC3887UJ-2 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C
AUTOMOTIVE PRODUCTS**
LTC3887EUJ#WPBF LTC3887EUJ#WTRPBF LTC3887UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ#WPBF LTC3887IUJ#WTRPBF LTC3887UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887EUJ-1#WPBF LTC3887EUJ-1#WTRPBF LTC3887UJ-1 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ-1#WPBF LTC3887IUJ-1#WTRPBF LTC3887UJ-1 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887EUJ-2#WPBF LTC3887EUJ-2#WTRPBF LTC3887UJ-2 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LTC3887IUJ-2#WPBF LTC3887IUJ-2#WTRPBF LTC3887UJ-2 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
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Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. F For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Overview Main Control Loop EEPROM (NVM) Power Up and Initialization Soft-Start Sequencing EVENT-Based Sequencing Shutdown Light Load Current Operation Switching Frequency and Phase Output Voltage Sensing Current Sensing PolyPhase Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Detection and Handling Internal EEPROM with CRC Protection and ECC Serial Interface Communication Protection Device Addressing Responses to VOUT and 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/Warn Response External Overtemperature and Undertemperature Fault Response Responses to External Faults Fault Logging Bus Timeout Protection Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface PMBus Command Summary PMBus Commands *Data Format Applications Information Current Limit Programming ISENSE+ and ISENSE– Pins Low Value Resistor Current Sensing Inductor DCR Current Sensing Slope Compensation and Inductor Peak Current Inductor Value Calculation Inductor Core Selection Power MOSFET and Schottky Diode (Optional) Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) INTVCC Regulator Topside MOSFET Driver Supply (CB, DB) (LTC3887, LTC3887-2) Undervoltage Lockout CIN and COUT Selection Fault Conditions Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations RCONFIG (External Resistor Configuration Pins) Voltage Selection Frequency and Phase Selection Using RCONFIG Address Selection Using RCONFIG Efficiency Considerations Checking Transient Response PC Board Layout Checklist PC Board Layout Debugging Design Example Additional Design Checks Connecting the USB to the I2C/SMBus/PMBus Controller to the LTC3887 In System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Input Voltage and Limits Output Voltage and Limits Current Input Current Calibration Output Current Calibration Input Current Output Current Temperature External Temperature Calibration External Temperature Limits 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 (EEPROM) Memory Commands Store/Restore Fault Logging Block Memory Write/Read Typical Applications Package Description Revision History Typical Application Related Parts