Datasheet LTC3884, LTC3884-1 (Analog Devices) - 5

LTC3884/LTC3884-1
PIN CONFIGURATION
LTC3884-1 TOP VIEW V CC – + V CC IN IN WM0 CC0 IN 48 I 47 I 46 NC 45 P 44 V 43 NC 42 PGND 41 EXT 40 V 39 INT PGOOD0 1 38 NC V + SENSE0 2 37 VCC1 V – SENSE0 3 36 PWM1 49 49 I + SENSE1 4 35 NC I – SENSE1 5 34 PGOOD1 ITHR0 6 33 V + SENSE1 ITH0 7 49 32 V – SENSE1 I + SENSE0 8 SGND 31 ITHR1 I – SENSE0 9 30 ITH1 TSNS1 10 29 VDD33 TSNS0 11 28 SHARE_CLK SYNC 12 49 49 27 WP SCL 13 26 VDD25 SDA 14 25 PHASE_CFG 16 17 18 20 21 T 15 22 23 T0 T1 ALER RUN0 FAUL FAUL RUN1 19 ASEL0 ASEL1 OUT0_CFG V V OUT1_CFG FREQ_CFG 24 RHE PACKAGE 48-LEAD (5mm × 6mm) PLASTIC GQFN TJMAX = 125°C, θJA = 31°C/W, θJC = 3.7°C/W EXPOSED PADS (PIN 49) ARE SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3884EUK#PBF LTC3884EUK#TRPBF LTC3884 UK 48-Lead (7mm × 7mm) Plastic QFN –40°C to 125°C LTC3884IUK#PBF LTC3884IUK#TRPBF LTC3884 UK 48-Lead (7mm × 7mm) Plastic QFN –40°C to 125°C LTC3884ERHE#PBF LTC3884ERHE#TRPBF LTC3884 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884IRHE#PBF LTC3884IRHE#TRPBF LTC3884 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884ERHE-1#PBF LTC3884ERHE-1#TRPBF LTC3884-1 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884IRHE-1#PBF LTC3884IRHE-1#TRPBF LTC3884-1 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C
AUTOMOTIVE PRODUCTS**
LTC3884ERHE#WPBF LTC3884ERHE#WTRPBF LTC3884 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884IRHE#WPBF LTC3884IRHE#WTRPBF LTC3884 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884ERHE-1#WPBF LTC3884ERHE-1#WTRPBF LTC3884-1 48-Lead (5mm × 6mm) Plastic GQFN –40°C to 125°C LTC3884IRHE-1#WPBF LTC3884IRHE-1#WTRPBF LTC3884-1 48-Lead (5mm × 6mm) Plastic GQFN –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 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 and ECC Serial Interface Communication Protection Device Addressing Responses to VOUT, IIN 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 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 PMBus Command Summary PMBus Commands *Data Format Applications Information Current Limit Programming ISENSE0± and ISENSE1± Pins Inductor DCR Sensing Inductor Value Calculation Inductor Core Selection Low Value Resistor Current Sensing Slope Compensation and Inductor Peak Current Power MOSFET and Optional Schottky Diode Selection Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) INTVCC/EXTVCC Power Topside MOSFET Driver Supply (CB, DB) Undervoltage Lockout CIN and COUT Selection Fault Indication Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Minimum On-Time Considerations External Temperature Sense Input Current Sense Amplifier External Resistor Configuration Pins (RCONFIG) Voltage Selection Frequency Selection Phase Selection Address Selection Using RCONFIG Efficiency Considerations Programmable Loop Compensation Checking Transient Response PolyPhase Configuration Master Slave Operation PC Board Layout Checklist PC Board Layout Debugging Design Example Additional Design Checks Connecting the USB to I2C/SMBus/PMBus Controller to the LTC3884 in System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing 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 Log Operation Fault Logging Block Memory Write/Read Typical Applications Package Description Revision History Typical Application Related Parts